News Column

Recent Findings from Institute for Solid State Physics Provides New Insights into Photocatalytics

June 24, 2014



By a News Reporter-Staff News Editor at Life Science Weekly -- Current study results on Photocatalytics have been published. According to news reporting originating from Hefei, People's Republic of China, by NewsRx correspondents, research stated, "The ultra-small Ag nanocrystallite-decorated TiO2 hollow sphere heterostructures were fabricated by using a two-step hydrothermal method. These heterostructures demonstrated an excellent photodegradation performance of rhodamine B. The photodegradation efficiency could reach up to 100% within 20min under simulated sunlight irradiation."

Our news editors obtained a quote from the research from Institute for Solid State Physics, "XRD, field emission SEM, TEM, scanning TEM, high-resolution TEM coupled with energy-dispersive X-ray spectroscopy, UV/Vis absorption and photoluminescence spectroscopy, X-ray photoelectron spectroscopy, Mott-Schottky analysis, and hydroxyl radical measurements were used to correlate the structure, surface property, and energy band alignment of rhodamine B to its photocatalytic activity. In these metal-semiconductor heterostructures, the Ag nanocrystallites were highly crystalline and were distributed evenly on the surface of TiO2 hollow spheres with compact interfaces. They reduced the recombination rate of charge carriers and favoured the charge transfer across the interfaces. The increased surface adsorbed oxygen facilitated the generation of hydroxyl radicals, and the reduced surface defects increased the lifetime of charge carriers upon Ag loading. The Schottky barriers between Ag and illuminated TiO2, the upward shift of the Fermi level, and increased electron density due to Ag coupling contributed to the charge transfer and increase in quantum efficiency."

According to the news editors, the research concluded: "These key factors involved in photocatalysis are of great importance to design functional and effective photocatalysts."

For more information on this research see: Improved Photocatalytic Performance of the Ultra-small Ag Nanocrystallite-Decorated TiO2 Hollow Sphere Heterostructures. Chemcatchem, 2014;6(5):1392-1400. Chemcatchem can be contacted at: Wiley-V C H Verlag Gmbh, Boschstrasse 12, D-69469 Weinheim, Germany. (Wiley-Blackwell - www.wiley.com/; Chemcatchem - onlinelibrary.wiley.com/journal/10.1002/(ISSN)1867-3899)

The news editors report that additional information may be obtained by contacting Q. Li, Chinese Academy Sci, Inst Solid State Phys, Key Lab Mat Phys, Anhui Key Lab Nanomat & Nanotechnol, Hefei 230031, People's Republic of China. Additional authors for this research include C.H. Zhang, J.M. Ma, G.Z. Wang and D.H.L. Ng (see also Photocatalytics).

Keywords for this news article include: Asia, Hefei, Photocatalyst, Nanotechnology, Emerging Technologies, People's Republic of China

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Life Science Weekly


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