The method requires only visible light and no external heating. Find out more at 🚀
Hydrogen sulfide, infamous for its aroma of rotten eggs, is known to be highly poisonous and corrosive - especially in wastewater applications. Petrochemical plants and other industries make thousands of tons of this gas every year as a byproduct of various processes that separate sulfur from petroleum, natural gas, coal, and other products.
In comparison, current catalytic technology refineries work through a method known as the Claus process, which requires multiple steps. Also, it produces sulfur but no hydrogen, which is converted into water. "Hydrogen sulfide emissions can result in hefty fines for industry, but remediation is also very expensive," Halas, a nanophotonics pioneer whose lab has spent years developing commercially viable light-activated nanocatalysts,. "The phrase 'game-changer' is overused, but in this case, it applies.
According to Halas, the process is economical; it could have low implementation costs and high efficiency to clean up nonindustrial hydrogen sulfide from sources like sewer gas and animal wastes. An illustration of the light-powered, one-step remediation process for hydrogen sulfide gas made possible by a gold photocatalyst created at Rice University.The team dotted the surface of grains of silicon dioxide powder with tiny "islands" of gold, according to the release. Each island was a gold nanoparticle that would interact with a wavelength of visible light. The reactions created "hot carriers," short-lived, high-energy electrons that can drive catalysis.
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