News Column

New Findings on Nanotechnology Described by Investigators at University of Illinois

June 3, 2014



By a News Reporter-Staff News Editor at Life Science Weekly -- Research findings on Nanotechnology are discussed in a new report. According to news reporting from Urbana, Illinois, by NewsRx journalists, research stated, "A novel Cu2O/TiO2 composite photocatalyst structure of Cu2O nanospheres decorated with TiO2 nanoislands were synthesized by a facile hydrolyzation reaction followed by a solvent-thermal process. In this Cu2O/TiO2 composite photocatalyst, Cu2O served as the main visible light absorber, while TiO2 nanoislands formed heterojunctions of good contact with Cu2O, beneficial to the photoexcited electron transfer between them."

The news correspondents obtained a quote from the research from the University of Illinois, "Their band structure match and inner electrostatic field from the p n heterojunction both favored the transfer of photoexcited electrons from Cu2O to TiO2, which effectively separated the electron hole pairs. Photogenerated holes on Cu2O could react with water or organic pollutants/microorganisms in water to avoid accumulation on Cu2O because of the partial TiO2 nanoislands coverage, which enhanced their stability during the photocatalysis process. Their superior photocatalytic performance under visible light illumination was demonstrated in both the degradation of methyl orange and the disinfection of Escherichia coli bacteria."

According to the news reporters, the research concluded: "An interesting post-illumination catalytic memory was also observed for this composite photocatalyst as demonstrated in the disinfection of Escherichia coli bacteria in the dark after the visible light was shut off, which could be attributed to the transfer of photoexcited electrons from Cu2O to TiO2 and their trapping on TiO2 under visible light illumination, and their release in the dark after the visible light was shut off."

For more information on this research see: Synthesis of Cu2O Nanospheres Decorated with TiO2 Nanoislands, Their Enhanced Photoactivity and Stability under Visible Light Illumination, and Their Post-illumination Catalytic Memory. ACS Applied Materials & Interfaces, 2014;6(8):5629-5639. ACS Applied Materials & Interfaces can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society - www.acs.org; ACS Applied Materials & Interfaces - www.pubs.acs.org/journal/aamick)

Our news journalists report that additional information may be obtained by contacting L.M. Liu, University of Illinois, Dept. of Mat Sci & Engn, Urbana, IL 61801, United States. Additional authors for this research include W.Y. Yang, Q. Li, S.A. Gao and J.K. Shang (see also Nanotechnology).

Keywords for this news article include: Urbana, Illinois, Nanosphere, United States, Photocatalyst, Nanotechnology, Photocatalytic, Emerging Technologies, North and Central America

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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