Nano
Sun Jul 15, 2018 1:43
Gold Nanoparticles for Solar Energy Storage
TEHRAN (FNA)- Star-shaped gold nanoparticles, coated with a semiconductor, can produce hydrogen from water over four times more efficiently than other methods - opening the door to improved storage of solar energy and other advances that could boost renewable energy use and combat climate change, according to researchers.

"Instead of using ultraviolet light, which is the standard practice, we leveraged the energy of visible and infrared light to excite electrons in gold nanoparticles," said Laura Fabris, associate professor in the Department of Materials Science and Engineering in the School of Engineering who led the work with Fuat Celik, assistant professor in the Department of Chemical and Biochemical Engineering. "Excited electrons in the metal can be transferred more efficiently into the semiconductor, which catalyzes the reaction."

The researchers, whose study was published online today in the journal Chem, focused on photocatalysis, which typically means harnessing sunlight to make faster or cheaper reactions.

Titanium dioxide illuminated by ultraviolet light is often is used as a catalyst, but using ultraviolet light is inefficient.

In the study, Rutgers researchers tapped visible and infrared light that allowed gold nanoparticles to absorb it more quickly and then transfer some of the electrons generated as a result of the light absorption to nearby materials like titanium dioxide.

The engineers coated gold nanoparticles with titanium dioxide and exposed the material to UV, visible, and infrared light and studied how electrons jump from gold to the material. The researchers found that the electrons, which trigger reactions, produced hydrogen from water over four times more efficiently than previous efforts demonstrated. Hydrogen can be used to store solar energy and then combusted for energy when the sun is not shining.

"Our outstanding results were ever so clear," Fabris said. "We were also able to use very low temperature synthesis to coat these gold particles with crystalline titanium. I think both from the materials perspective and the catalysis perspective, this work was very exciting all along. And we were extremely lucky that our doctoral students, Supriya Atta and Ashley Pennington, were also as excited about it as we were."

"This was our first foray," she added, "but once we understand the material and how it operates, we can design materials for applications in different fields, such as semiconductors, the solar or chemical industries or converting carbon dioxide into something we can use. In the future, we could greatly broaden the ways we take advantage of sunlight."

 

 

 

 

Bottom top
‘Washington Has No Idea About Who It Deals with': Erdogan Brushes Off US Criticism over S-400

TEHRAN (FNA)- Turkish President Recep Tayyip Erdogan confirmed that Ankara does not intend to abandon the S-400 missile systems purchased from Russia.
‘Rigged Election?’ Trump Seizes on Biden's Latest Gaffe, Boasting About 'Most Extensive, Inclusive VOTER FRAUD' Organization

TEHRAN (FNA)- Democratic presidential candidate Joe Biden's remark that his party has created “the most extensive voter fraud organization” has reinforced the former VP’s “gaffe-machine” status, giving the Republicans a free gotcha moment.
Iran Reports 6,191 New COVID-19 Cases

TEHRAN (FNA)- The Iranian health ministry announced on Sunday that 6,191 new cases of coronavirus infection have been reported across the country during the past 24 hours, adding that 296 patients have passed away in the same period of time.
GC Spokesman: Iran Not Interested in US Presidential Election

TEHRAN (FNA)- Spokesman of Iran’s Guardian Council Abbasali Kadkhodayee underlined that the Islamic Republic is not interested in interfering in the US presidential election, and blasted the media hype by the West in this regard.
Pakistan PM: French President Encouraged Islamophobia

TEHRAN (FNA)- The Pakistani prime minster added his voice to the growing criticism of the French president for "encouraging Islamophobia" following the killing of a teacher who showed cartoons of the Prophet Mohammad (PBUH) to his pupils.
Biden Gains as Suburban Women, Elderly Voters Look to Dump Trump

TEHRAN (FNA)- Joe Biden’s hopes of reaching the White House could rest on two crucial demographic groups that appear to be deserting President Donald Trump: elderly people and suburban women.
Iranian Army Conducts Military Drills along Northwestern Borders

TEHRAN (FNA)- The Iranian Army Ground Force units staged a one-day drill along the country's Northwestern border regions on Sunday.
Iran Calls for Broadening of Bilateral Ties with Bolivia

TEHRAN (FNA)- Iranian President Hassan Rouhani called for the expansion of mutual cooperation with Bolivia in different fields.
Officials: Top al-Qaeda Leader Killed in Eastern Afghanistan

TEHRAN (FNA)- A senior al-Qaeda commander has been killed by Afghan security forces in the central city of Ghazni, security officials said.
COVID-19: Italy Reports Highest Single-Day Spike

TEHRAN (FNA)- Italy reported 19,644 new coronavirus cases on Saturday, the highest single-day spike since the start of the pandemic.
IRGC Commander Warns against Geopolitical Border Change in Regions Around Iran

TEHRAN (FNA)- Islamic Revolution Ground Force Commander Brigadier General Mohammad Pakpour said any threat that harms people’s security and calm will receive Iran’s countermeasure, but further warned that his country would not tolerate any change in the geopolitical borders in regions close to Iran.
Palestinian Groups Condemn Macron’s Defense of Anti-Islam Cartoons

TEHRAN (FNA)- Palestinian resistance groups based in the Israeli-besieged Gaza Strip have blasted French President Emmanuel Macron for defending offensive cartoons of Islam’s Prophet Mohammad (PBUH).
Iran Condemns Terrorist Attack in Afghanistan

TEHRAN (FNA)- Iranian Foreign Ministry Spokesman Saeed Khatibzadeh condemned a terrorist attack in Afghanistan, saying that the Afghan students have fallen victim to the ugly violence and unending war they had never chosen.
Iran: Arbitrary Detention of Palestinians by Israel Should Stop

TEHRAN (FNA)- The Iranian Foreign Ministry condemned the Zionist regime’s unjust imprisonment of hundreds of Palestinians, urging the immediate release of hunger striker Maher Al-Akhras.
350kg of Opium Seized in Central Iran in 4 Operations

TEHRAN (FNA)- Police forces of the Central Province of Yazd confiscated 350 kg of illegal drugs in four separate operations, according to the local police commander Brigadier General Abbas Ali Behdani Fard.