I D
× COMMENTARYCOVER STORYIN THE NEWSNEWSFRONTSCHEMENTATOR + Show More BUSINESS NEWSTECHNICAL & PRACTICALFEATURE REPORTFACTS AT YOUR FINGERTIPSTECHNOLOGY PROFILEEQUIPMENT & SERVICESFOCUSNEW PRODUCTS + Show More

Comment

This multifunctional photocatalyst splits water with visible light

By Tetsuo Satoh |

Oxysulfide semiconductors have narrow bandgaps — a property that makes them suitable photocatalysts for water splitting under irradiation with visible light (640 nm wavelength). That’s because the electronegative sulfide ions negatively shift the valence band edges of the corresponding oxides. However, the instability of sulfide ions during the water oxidation is a critical obstacle to simultaneous evolution of hydrogen and oxygen. Now, a Japanese collaboration of industry, academia and government has demonstrated the activation and stabilization of Y2Ti2O5S2 (1.9 eV bandgap), as a photocatalyst for overall water splitting. On loading of IrO2 and Rh/Cr2O3 as O2 and H2 evolution co-catalysts, respectively, and fine-tuning of the reaction conditions, simultaneous production of stoichiometric amounts of H2 and O2 was achieved on Y2Ti2O5S2 during a 20-h reaction. The fine particles of the photocatalyst could be handled by a simple spray-coating procedure to produce a photocatalyst sheet with a large surface-area. The discovery of the overall water-splitting capabilities of Y2Ti2O5S2 is expected to be applied for the inexpensive production of H2, while extending the range of promising materials for solar-H2 production. The consortium…
Related Content
Advanced water electrolysis launched
Last month, thyssenkrupp Industrial Solutions AG (Dortmund, Germany; www.thyssenkrupp-industrial-solutions.com) launched industrial-scale water electrolysis systems that make large-scale hydrogen production from…

Andritz

Minimizing particle breakage and mother liquor residue in technical salts production

Technical salts and crystallization products have found a broad spectrum of different applications in the industrial sector in the past decades. One of the most frequently used salts is sodium chloride...

Chemical Engineering publishes FREE eletters that bring our original content to our readers in an easily accessible email format about once a week.
Subscribe Now
The Big 6 level measurement technologies: Where to use them and why
Minimizing particle breakage and mother liquor residue in technical salts production
Expectations are shifting: How measurement solutions can help overcome chemical industry challenges
CoriolisMaster: The SmartSensor solution
ABB in Chemical Industry

View More