12 days agoWATCH: Liverpool midfielder Wijnaldum caps off brace with thunderbolt

first_imgWATCH: Liverpool midfielder Wijnaldum caps off brace with thunderboltby Freddie Taylor12 days agoSend to a friendShare the loveGini Wijnaldum has scored a thunderbolt in the Netherlands 2-1 win over Belarus on Sunday.
The long-range strike was the Liverpool midfielder’ second goal of the game.The first came from a header from six yards out.Great goal. Georginio Wijnaldum blasts one into the top corner for Netherlands vs Belarus. His second of the game. pic.twitter.com/UAipkAHBI3— James Nalton (@JDNalton) October 13, 2019 About the authorFreddie TaylorShare the loveHave your saylast_img read more

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6 days agoWerder Bremen coach Kohfeldt: Grujic chase just about…

first_imgWerder Bremen coach Kohfeldt: Grujic chase just about…by Paul Vegas6 days agoSend to a friendShare the loveWerder Bremen coach Florian Kohfeldt admits their interest in Liverpool midfielder Marko Grujic is over.The Serb chose to sign on-loan with Hertha Berlin this summer ahead of Werder.And Kohfeldt concedes: “You cannot rule out anything, but that would be pure speculation to think about it.”The coach also said: “He is a very good player, but he is now a player from Hertha and in the summer probably will again be a Liverpool. “This is not an issue for us now.” TagsTransfersAbout the authorPaul VegasShare the loveHave your saylast_img read more

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Video: Refs Absolutely Botch Late Call In Syracuse vs. Gonzaga

first_imgA close up of Trevor Cooney not out of bounds.trevor cooney out of boundsSyracuse survived Gonzaga Friday night, but it wasn’t without controversy. The Orange, which rallied to overcome a five-point deficit late, almost lost in heartbreaking fashion. A phantom out-of-bounds call was at the center of the storm.Gonzaga, trailing 61-60, had a chance to take the lead with 20 seconds to play, but an errant pass from Josh Perkins wound up in the hands of SU’s Trevor Cooney. Cooney, upon collecting the ball, did all he could to keep his feet inbounds.Cooney, however, was whistled out of bounds. As you’ll see below, it was a bad call.Channeling Cooney’s Balance @bballbreakdown #MarchMadness @AdamZagoria, @espn, @GregAnthony50 https://t.co/7LvScmvE9P— BBiomechanics (@BBiomechanics) March 26, 2016Yep, he’s in, what a play by Cooney. #Syracuse pic.twitter.com/wG4pfaReio— XFINITY Sports (@XFINITYSports) March 26, 2016Let’s review how much time is left.OK, now let’s make the wrong call.— Darren Rovell (@darrenrovell) March 26, 2016#cooney was #inbounds #Sweet16 #Syracuse wooooooo pic.twitter.com/tZhkMHjAnw— Grove Street (@Grove_Street2x) March 26, 2016Tyler Lydon blocked the Bulldogs’ shot on the ensuing possession, and after two Lydon free throws, the Orange emerged victorious anyway. They’ll next get UVA in an all-ACC Midwest region showdown.last_img read more

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FS1’s Tim Brando: Notre Dame Will Eventually Join ACC Football, Is Key To Conference Launching Network

first_imgA Notre Dame cheerleader holding pompoms with the Notre Dame flag in the background.SOUTH BEND, IN – SEPTEMBER 30: A Notre Dame Fighting Irish cheerleader performs during a game against the Miami (Oh) Redhawks at Notre Dame Stadium on Seotember 30, 2017 in South Bend, Indiana. Notre Dame defeated Miami (OH) 52-17. (Photo by Jonathan Daniel/Getty Images)This week, there has been a lot of noise made about the future of a possible ACC Network, which has been long discussed as a possibility for the league with ESPN. In a column on Campus Rush, Sports Illustrated‘s Pete Thamel called the network “imminent.” FOX Sports 1’s Tim Brando, who also calls ACC basketball games for Raycom Sports, doesn’t quite believe that we’ll see an ACC Network all that soon, but he does think it is coming, and the lynchpin to a launch is Notre Dame joining as a full conference member. That, he believes, will happen.Brando previously discussed Notre Dame’s role in the eventuality of the ACC Network on Twitter, and cleared things up a bit on “The Audible” podcast with Bruce Feldman and Stewart Mandel. Notre Dame/ACC talk starts around the 18-minute mark.On the ACC Network:“I do believe it’s going to happen, and I believe it’s going to happen when Notre Dame understands that it’s in their financial best interest to be in a conference, because they cannot command the same dollar from NBC or any other network by simply having seven home games televised. If you look at the revenues generated by both the Big Ten, the SEC, and the ACC without a network, as a conference member full time, they would, not only right now but certainly in the future, do much better than they are doing with their current arrangement. And I think that’s where we sit.”Brando says that if Notre Dame joins a conference in the next 10 years, the ACC is the only option:“No, Notre Dame cannot have a wandering eye. They not only signed a grant of rights with the ACC, but they signed an additional contract, which mandates that if they do become a conference member in football, there is no other place they can do that other than the Atlantic Coast Conference. And that’s through the year 2025. So (ACC commissioner) John Swofford and his people did a remarkable job when they brought Notre Dame in, to secure that when the Irish blue bloods decided ‘you know what, maybe it’s time to join a conference,’ they need to do that.”Perhaps most surprisingly, he predicts that this will unfold in the next three years.“I really believe that as we move forward, it’s a little early to be thinking about starting a linear network now, given the economics… It may not be the time in a year or two years, but in three years I believe you’ll be looking right down the pipe at an ACC Network, and I think the reason will be Notre Dame elected to become a full-time member.”The ACC is often viewed as the weakest of the Power 5 conferences, although with the Big 12’s issues, and the recent success of Clemson and Florida State, as well as a slew of strong hires this year, the league appears to be on solid ground. If it does, in fact, bring Notre Dame into the fold as a full member, it would be a massive coup for Swofford and company.[FOX Sports]last_img read more

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Annie Lennox Responds To Gaza Blog Comments

first_imgAnnie Lennox has addressed the many comments that her blogs about the violence in Gaza have garnered over the last few weeks.The singer and activist has been blogging about the situation in Gaza over the last few weeks, but her thoughts have caused a stir among those who read them, with many choosing sides.“Over the last few weeks my blogs have been mainly focused on the plight of thousands of innocent civilians trapped in Gaza (many of whom are young children) who have been the victims of bombing raids,” she wrote. “Whichever way you look at the arguments for and against on either side, it is abominable that any human being should have to suffer on such a scale.“I have read most of the comments posted on my blogs. The entire spectrum of viewpoints has been well represented… from hate filled bigotry to more rational viewpoints, all passionately expressed. Somewhat predictably it is so often “There is only one side… and if you’re not with us, you’re against us.”“For me, this kind of perspective only ever leads to destruction as the inevitable end game. The possibility for long term sustainable peace should be the only goal. But it seems that after decades of abuse, the situation is further away from a positive solution than it ever was. How many more innocent people must be slaughtered? How many lives shattered?“Latest developments across the entire Middle East seem to be rapidly turning the region into an even bigger tinder keg of madness and extremism. What’s the end game? I personally don’t see how this can turn out well. I don’t know how other people are feeling, but I find this all deeply disquieting.”last_img read more

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Womens lacrosse falls to Penn State in seasonending loss

The Buckeyes played host to the American Lacrosse Conference Tournament at Jesse Owens Memorial Stadium this week, as they lost to Penn State 14-12 in the quarterfinal round.The Nittany Lions (10-7) wasted no time, putting their first goal in the net within the first 40 seconds. The two teams then exchanged goals before PSU went on to score seven of the next nine goals, forcing the Buckeyes to call a time-out to regroup.“We dug ourselves a hole. We waited too long to come back,” said Kelly Haggerty, a three-year letter winner who ended the game with two goals and three assists. “We knew how much we wanted it and we remind ourselves how much we wanted to win this game. We just try to pump ourselves up because we know we can do it, we know we have it in us.”OSU put in two goals before the half, heading into the locker room down 10-6.Both committed several turnovers in the first half, with OSU recording six and PSU recording five.The Buckeyes fired back at the start of the second period, bringing the score back 8-10. PSU followed up with four straight goals to give the Nittany Lions a solid six-goal cushion late in the second.OSU, who came back from behind just once this season, was unable to catch up with PSU despite a four-goal scoring run to end the game.“I always ask the girls to play their heart out and I’ve questioned that in a couple close games, but this one today they played as hard as they could until the bitter end,” coach Sue Stimmel said. “It’s just unfortunate when you don’t win in those situations.”Sophomore Alayna Markwordt led the Buckeyes with three goals and junior Jayme Beard recorded a game-high four assists in the loss.Members of the team and coaching staff wore orange armbands with the initials “Y.L.” on them in honor of Yeardley Love, the Virginia women’s lacrosse player who was killed on Monday.A moment of silence was held prior to the awards ceremony Saturday on her behalf.This marks the end of the season for the lacrosse girls, who got to play their last game on home turf.“It was awesome. I’m sad it’s over, but there’s no other place to play like this,” Haggerty said. “A lot of people don’t get to experience what we experience. It’s just really heartfelt, and there’s nothing like team camaraderie.” read more

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Wright Rashford needs to weigh his future at United

first_imgArsenal legend Ian Wright has called on Manchester United forward Marcus Rashford to make bold decisions about his future at the club.Rashford, 20, has experienced a stop-start career at Old Trafford under Jose Mourinho but was recently named in Gareth Southgate’s latest squad.The pacy forward is wanted by other clubs and Wright admits a player who has made no secret of his desire to operate as a central striker needs to evaluate his options.The former England frontman told BBC Radio 5 Live: “I think that Rashford, especially when he burst onto the scene, we saw flashes of a striker that can go into the space and he can link up, and he can finish.“Now, what’s happened to him since he’s been at United on the left or the right, wherever they play him, he’s played everywhere apart from up front learning his trade.Cristiano Ronaldo, Nemanja Vidic, Manchester UnitedVidic: “Ronaldo is the most professional footballer I’ve seen” Andrew Smyth – September 14, 2019 Nemanja Vidic opened up on how a 21-year-old Cristiano Ronaldo’s professionalism left him stunned at Manchester United.“He’s got pace, he’s got skill, he’s got finishing ability. He’s been playing in roles that have taken the edge of those sides of his game.“Rashford’s got massive, massive, decisions to make in the next year, 18 months for me.“He’s either got to leave Manchester United and play and play in a position where he’s going to start to be that player we all thought he was going to be“When he burst onto the scene, scoring goals left, right and centre every competition he has played in or he’s going to have to stay there, whether it’s Mourinho or whoever it is, and maybe playing on the left, maybe playing on the right, maybe playing up front.”last_img read more

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Tedesco The only thing missing for Schalke was a goal

first_imgSchalke 04 boss Domenico Tedesco was pleased with their dominant performance at Galatasaray in the Champions League, but rued their missed chances in a 0-0 drawThe Royal Blues got off to a slow start at Istanbul but gradually emerged as the more dangerous side as the game progressed.After the break, Galatasaray goalkeeper Fernando Muslera was forced to make several saves from Schalke.The visitors had actually got the ball into the back of the net, only for Breel Embolo’s effort to be ruled out for offside.“I always try to remain positive – which is why I can recognise my team’s good performance and I am not focusing on not getting the win. We knew before the game that there would be a tremendous atmosphere here,” Tedesco told the club website.Top 5 Atletico Madrid players to watch in next week’s UCL Tomás Pavel Ibarra Meda – September 14, 2019 With the Champions League about to start, we need to start talking about the Top 5 Atletico Madrid players to watch in the competition.Atletico…“Players are always going to take a few minutes to adapt to this. Once we did that, we got into the game well. We were dominant tonight, it was fun to watch. The only thing missing tonight was a goal.“We had plenty of chances to score as well – we need to carry on working on this. If we can combine this kind of performance with some better finishing, we will start getting positive results again.“Ultimately we are satisfied with the point, even though we deserved the win. The group is still wide open after three games; anyone can beat anyone in my opinion.”Schalke are second in Group D with five points, while Galatasaray sit in third place on four points.last_img read more

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Jessore road crash kills schoolboy

first_imgA schoolboy was killed as his motorbike hit a roadside tree on Jessore-Benapole highway in Jessore on Sunday, reports UNB.The deceased was Raihan Parvez, 16, son of Abdul Mannan, a resident of Chachra Karichiya village and class X student of of Rudropur High School.Victim’s father Abdul Mannan said that the accident occurred around 9:00am as the motorcycle hit the tree after Parvez lost control over the bike, leaving him dead on the spot.last_img

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Venezuelan protesters clash with police

first_imgDemonstrators protesting against President Nicolas Maduro’s government and riot police clash in Caracas. Photo: AFPProtesters hurling rocks clashed with police firing tear gas Saturday in Venezuela’s fourth demonstration in a week against President Nicolas Maduro and his government.The rally was marked by anger over a ruling from the leftist government banning opposition leader Henrique Capriles from office for 15 years. Around 4,000 people attended the demonstration.Capriles narrowly lost the 2013 presidential election that brought Maduro to power following the death of his mentor Hugo Chavez—father of Venezuela’s “socialist revolution.”The government move, which the 44-year-old Capriles announced on Friday, effectively prevents him from running against Maduro in next year’s general election.Saturday’s violence broke out when protesters gathered in the east of the city changed course at Capriles’s request and headed downtown toward the government ombudsman’s office.The district—seat of many government offices—is a pro-Maduro bastion, and the president’s supporters were holding a “cultural, sporting and recreational rally” there.National Guard police fired tear gas and rubber bullets to force the protesters back.“They received us with gas and rubber bullets. They insist on siding with the dictatorship but we are going to keep moving forward,” said opposition lawmaker Juan Andres Mejia.Masked demonstrators threw rocks and Molotov cocktails at police, said AFP reporters on scene. At least two police officers were hit by the flaming bottles.‘Product of tyranny’Capriles appeared energized by the protests.“He who laughs last, laughs best! We’ll see you on the streets of Venezuela @nicolasmaduro. There will be no rest,” Capriles promised on Twitter.Capriles was also one of the leaders of mass demonstrations against Maduro earlier this week that led to clashes with police. One protester died.“This thing that they just did to Capriles is the product of tyranny,” said Adel Rincones, 61, who clutched a sign that read “Venezuela is wounded in the heart with hunger, misery, corruption, dictatorship.”Others at the rally held pictures of Capriles.“People are tired of so much corruption, hunger and poverty,” said Vanessa Garcia, 37, an optometry student.Protests also erupted in several other cities, including unrest-prone San Cristobal in the west, where masked gunmen reportedly set off explosions, causing demonstrators to flee.‘Administrative irregularities’State comptroller Manuel Galindo imposed the ban on Capriles due to alleged “administrative irregularities” in his post as governor of the northern state of Miranda.Capriles said that he would appeal the decision and stay in his job as governor, which he has held since 2008.Venezuela’s political crisis intensified last week when the Supreme Court issued rulings curbing the powers of the opposition-controlled legislature.The court has consistently ruled in Maduro’s favor since the opposition majority took its seats in the National Assembly legislature in January 2016.It drew international criticism for last week’s rulings, which seized the assembly’s powers and revoked lawmakers’ immunity from prosecution.Opposition intensifiesThe court reversed the rulings days later, but the opposition intensified its protests, prompting police to fire tear gas and water cannon to control them.The opposition then came up with the idea of seeking the dismissal of the Supreme Court’s justices. But the ombudsman’s office blocked the move.Capriles can appeal against his sanction within two weeks to the comptroller and within six months to the Supreme Court.The collapse in prices for Venezuela’s crucial oil exports has sapped the country’s revenues.Ordinary Venezuelans are suffering from shortages of food, medicine and basic goods along with a surge in violent crime.The opposition blames Maduro for the economic crisis. He says it is due to a capitalist conspiracy backed by the United States.New protests are planned for next week.last_img read more

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Texas Among Numerous Redistricting Challenges Pending In Courts

first_img Share Shelby Knowles for The Texas TribuneThe U.S. Supreme Court in Washington, D.C., on June 7, 2017.The U.S. Supreme Court is scheduled to hear arguments Wednesday on a lawsuit alleging partisan gerrymandering in the drawing of a Maryland congressional district. Eight years after the 2010 Census provided the basis for legislative redistricting, several other cases alleging unconstitutional gerrymandering in various states also are still working their way through the court system.In Pennsylvania, a recent court ruling reshaped congressional districts for this year’s elections. But many of the other cases could have a greater impact in the years to come. That’s because they could set precedents that states must follow during the next round of redistricting after the 2020 Census.Here’s a look at some key redistricting cases ruled upon recently or still pending in courts:WISCONSINPartisan breakdown: State Assembly — 63 Republicans, 35 Democrats, one vacancy.The claim: Partisan gerrymandering.The case: A federal court in November 2016 struck down Wisconsin’s state Assembly districts enacted in 2011 by the Republican-led Legislature and Republican governor as an unconstitutional partisan gerrymander in violation of Democratic voters’ rights to representation. The U.S. Supreme Court heard arguments in October 2017 and has yet to rule in the case. It could set a precedent for whether and how courts can determine if partisan gerrymandering is unconstitutional.___MARYLANDPartisan breakdown: U.S. House — seven Democrats, one Republican.The claim: Partisan gerrymandering.The case: A federal lawsuit filed in 2013 by Republican voters alleges that the Democratic governor and Democratic-controlled Legislature unconstitutionally gerrymandered the 6th Congressional District in 2011 to dilute the voting power of Republicans. The district had been held by a 20-year Republican incumbent. It’s since been held by a Democrat. The U.S. Supreme Court is to hear arguments Wednesday challenging a federal court’s refusal last August to bar continued use of the redistricting plan. The lower court put the case on hold pending guidance from the Supreme Court.___TEXASPartisan breakdown: U.S. House — 25 Republicans, 11 Democrats. State Senate — 20 Republicans, 11 Democrats. State House — 94 Republicans, 56 Democrats.The claim: Racial gerrymandering.The case: U.S. and state House maps enacted in 2011 by the Republican governor and GOP-led Legislature were tossed out in 2012 by a federal court, which produced new interim maps. Those maps were permanently adopted by the Legislature and governor in 2013. But last year, the federal court ruled that some districts were racially gerrymandered to weaken the electoral power of growing minority populations. The U.S. Supreme Court has blocked lower court orders to redraw two congressional districts and nine state House districts for the 2018 elections and is scheduled to hear arguments April 24 on an appeal of the lower court rulings.___PENNSYLVANIAPartisan breakdown: U.S. House — 12 Republicans, six Democrats if Democrat Conor Lamb’s lead holds up in a March 13 special election to replace resigned Republican Rep. Tim Murphy.The claim: Partisan gerrymandering.The case: The Pennsylvania Supreme Court ruled in January that the U.S. House districts enacted in 2011 by a Republican governor and GOP-led Legislature were an unconstitutional partisan gerrymander favoring Republicans. The Democratic-led court in February imposed new district boundaries that analysts said could boost Democrats’ electoral prospects. The U.S. Supreme Court and a lower federal court both declined March 19 to halt or overturn the use of the new districts in this year’s elections.___NORTH CAROLINAPartisan breakdown: U.S. House — 10 Republicans, three Democrats. State Senate — 35 Republicans, 15 Democrats. State House — 75 Republicans, 45 Democrats.The claims: Racial and partisan gerrymandering.The cases: The U.S. Supreme Court in January temporarily blocked a lower court’s order for state lawmakers to again redraw North Carolina’s congressional districts, pending an appeal of the panel’s ruling. That ruling held that the Republican-led legislature engaged in unconstitutional partisan gerrymandering when it redrew districts in 2016. Lawmakers were redrawing districts because a different federal judicial panel had stuck down the Legislature’s 2011 redistricting plan as an unconstitutional racial gerrymander. Separately, the U.S. Supreme Court in February temporarily blocked portions of the lower court’s decision redrawing state legislative districts. That was pending an appeal of the panel’s ruling that the Republican-led legislature’s 2017 redistricting plan violated the state constitution and contained racial biases left over from the maps it originally approved in 2011.___VIRGINIAPartisan breakdown: U.S. House — seven Republicans, four Democrats. State Senate — 21 Republicans, 19 Democrats. State House — 51 Republicans, 49 Democrats.The claim: Racial gerrymandering.The cases: The U.S. Supreme Court last year ordered a lower court to reconsider previously rejected claims that a Republican-led Legislature and governor unconstitutionally diluted black voting strength in the state. The claim was that Republicans did so by packing a high percentage of black voters into 11 state House districts under a 2011 redistricting plan. That case is still pending. A separate case pending before the state Supreme Court alleges that 11 state House and Senate districts are not compact enough. In yet another case, a federal court in 2016 redrew congressional districts after ruling that black voters had been illegally packed into a particular district to diminish their voting strength elsewhere.___GEORGIAPartisan breakdown: State House — 116 Republicans, 64 Democrats.The claim: Racial gerrymandering.The case: A federal lawsuit filed last April alleges that two state House districts were unconstitutionally gerrymandered by the Republican-led Legislature in 2015 to increase the percentage of white voters and decrease the percentage of black voters. Both Republican incumbents were re-elected over black Democratic challengers in 2016. Pre-trial motions to grant a preliminary injunction against continued use of the districts are under consideration.___MICHIGANPartisan breakdown: U.S. House — nine Republicans, four Democrats, one vacancy. State Senate — 27 Republicans, 11 Democrats. State House — 63 Republicans, 46 Democrats, one vacancy.The claim: Partisan gerrymandering.The case: A federal lawsuit filed in December by Democratic voters alleges the U.S. House and state legislative districts enacted in 2011 by a Republican governor and Republican-led Legislature are unconstitutionally gerrymandered to dilute the voting power of Democrats. Republicans have controlled the state legislative and congressional delegations since then. Pre-trial motions to dismiss the lawsuit are under consideration.___ALABAMAPartisan breakdown: State Senate — 26 Republicans, seven Democrats, one independent, one vacancy. State House — 70 Republicans, 32 Democrats, three vacancies.The claim: Racial gerrymandering.The case: Most state House and Senate candidates will be running for office under new districts this year. That’s the result of a lawsuit alleging that maps approved in 2012 by the Republican-controlled Legislature packed too many black voters into certain districts. The U.S. Supreme Court in 2015 ordered the maps to be reconsidered by a lower court, which struck down a dozen districts last year. The Legislature then redrew 25 of the 35 Senate seats and 70 of the 105 House seats, reducing racial polarization in most districts. The court dismissed a challenge to the new maps last October.last_img read more

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New AfricanAmerican Heart Disease Registry to Assist in Treatment

first_imgWith an eye toward providing better health care for underserved populations, the Association of Black Cardiologists in conjunction with the Morehouse School of Medicine and the American Heart Association is creating a cardiovascular disease registry for African Americans.The database will import data directly from electronic health records, enabling researchers to analyze trends and develop more effective, targeted treatments for African-American patients.“A comprehensive registry dedicated to addressing healthcare disparities among African American patients is long overdue,” Dr. Barbara Hutchinson, current president of the Association of Black Cardiologists, said in a statement.“This is a step forward in engaging African Americans in clinical studies,” she added. “This registry will highlight issues essential to achieving health equity and reducing the substantial gap in morbidity and mortality that currently exists for our patient population.”Heart disease is the leading cause of death among African Americans, accounting for 23.8 percent of Black deaths in 2008, and among most ethnic groups in the United States, according to the Centers for Disease Control and Prevention. Approximately one in every four deaths in the U.S. annually (610,000 people) is attributable to heart disease.Black cardiologists say they hope the new registry will be a new tool in their arsenal to combat the deadly disease within the Black community.“The registry will address critical gaps in the quality of healthcare for African Americans and other underserved patients,” particularly in patient-centered outcomes research, said Dr. Elizabeth Ofili, principal investigator for the registry and senior associate dean of clinical and translational research at Morehouse, an Atlanta-based HBCU.last_img read more

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Easing Atmospheric CO2 Levels Using Nanotubes and Sunlight

first_img(PhysOrg.com) — Researchers at The Pennsylvania State University have determined a way to use arrays of nanotubes in a solar-based process to convert carbon dioxide and water into methane and other hydrocarbon fuels. Their method may provide a new way to reduce carbon-dioxide levels in the atmosphere—rising due to our planet’s heavy use of fossil fuels—as well as produce alternative fuels. The rate of carbon dioxide (CO2) conversion using this method is 20 times higher than that of previously published research. The work is described in the January 27, 2009, online edition of Nano Letters.”Every 12 days the world consumes about one billion barrels of oil, which represents the release of almost 1 trillion pounds of carbon dioxide into the atmosphere,” said the study’s lead researcher, Craig Grimes, to PhysOrg.com. “One way of dealing with this problem is by recycling the CO2 into a high-energy-content fuel, but this makes sense only if a renewable energy source, like solar energy, can be used in the process.”This type of solar-based conversion process only works if a photocatalyst—a material that reacts with light—is used to convert the CO2 into hydrocarbons. A photocatalyst that utilizes the most solar energy possible is the best option.One popular photocatalyst candidate for the job has been titanium dioxide, also called titania, because it can powerfully react with oxygen. But so far, researchers haven’t been able to make titania perform adequately despite experimenting with a variety of forms, such as nanoparticles, pellets, and multi-layer films.Grimes and his colleagues used arrays of titania nanotubes. They created the nanotubes using a technique that incorporates nitrogen into the nanotubes’ structures, which the researchers initially thought would help increase the conversion rate (this turned out to be true only in a very limited capacity).The process also yields a high total surface area compared to other forms of the material, a property that aids in the conversion. To further boost the process, the group scattered an ultra-thin layer of platinum and/or copper “cocatalyst” nanoparticles on the surface of the array.The nanotubes were as long as 140 micrometers (millionths of a meter) in length and a diameter of about 115 nanometers (billionths of a meter). The total size of each array sample was about 2 centimeters square and the group created several samples.The researchers made two reaction chambers, each with a window at the top to let in sunlight. They loaded one sample into each chamber and evacuated the air out, producing a vacuum, and sealed them. Next they pumped CO2 through a tank of water and into the chambers, flushing it through via intake and outtake valves for 10 minutes.This all took place outdoors on sunny or mostly-sunny days on the Penn State campus. The samples were left outside for 2.5 hours, up to a maxiumum of 3.5 hours, between about 12:30 and 4:00 p.m.Analysis of the chambers’ interiors showed that the predominant product of the conversion was methane, with some ethane, propane, butane, pentane, and hexane, along with other materials in very small concentrations. The conversion rates were high, although comparing the results with other published results was rather difficult, according to the group.”Most of the previous results were achieved using nanoparticles illuminated by ultraviolet light, so we were not exactly comparing apples to apples,” said Grimes. “But going by the weight of the material, we could figure out that the rate of hydrocarbon production we achieved is at least 20 times higher than those previous studies.”Grimes and his group attribute their success, in large part, to the cocatalyst particles they used. They think that a homogeneous distribution of both types could further increase the conversion rate.More information: Nano Lett., 2009, 9 (2), pp 731-737 DOI: 10.1021/nl803258pCopyright 2009 PhysOrg.com. All rights reserved. This material may not be published, broadcast, rewritten or redistributed in whole or part without the express written permission of PhysOrg.com. Citation: Easing Atmospheric CO2 Levels Using Nanotubes and Sunlight (2009, February 16) retrieved 18 August 2019 from https://phys.org/news/2009-02-easing-atmospheric-co2-nanotubes-sunlight.html This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no part may be reproduced without the written permission. The content is provided for information purposes only. Explore further City dwellers can have an outsized impact on curbing global warming A digital photograph of one of the reaction chambers under natural sunlight. Photo courtesy Craig Grimes.last_img read more

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