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Study Data from Inha University Provide New Insights into Materials Science (Novel Coupled Structures of FeWO4/TiO2 and FeWO4/TiO2/CdS Designed for...

August 5, 2014



Study Data from Inha University Provide New Insights into Materials Science (Novel Coupled Structures of FeWO4/TiO2 and FeWO4/TiO2/CdS Designed for Highly Efficient Visible-Light Photocatalysis)

By a News Reporter-Staff News Editor at Journal of Technology -- New research on Materials Science is the subject of a report. According to news reporting from Inchon, South Korea, by VerticalNews journalists, research stated, "A quadrilateral disk-shaped FeWO4 nanocrystal (NC) with an average size of similar to 35 nm was prepared via hydrothermal reaction. The obtained dark brown FeWO4 NC with a bandgap (E-g) of 1.98 eV was then coupled with TiO2 to form FeWO4/TiO2 composites."

The news correspondents obtained a quote from the research from Inha University, "The valence band (VB) of FeWO4 (+2.8 eV vs NHE) was more positive than that of TiO2 (+2.7 eV); thus this system could be classified as a Type-B heterojunction. Under visible-light irradiation, 5/95 FeWO4/TiO2 (by wt %) exhibited remarkable photocatalytic activity: the amount of CO2 evolved from gaseous 2-propanol (IP) and the decomposition rate of aqueous salicylic acid (SA) were, respectively, 1.7 and 2.5 times greater than those of typical nitrogen-doped TiO2 (N-TiO2). This unique catalytic property was deduced to arise from the intersemiconductor hole transfer between the VBs of FeWO4 and TiO2. Herein, several experimental evidence were also provided to confirm the hole-transfer mechanism. To further enhance the catalytic efficiency, double-heterojunctioned FeWO4/TiO2/CdS composites were prepared by loading CdS quantum dots (QDs) onto the FeWO4/TiO2 surface."

According to the news reporters, the research concluded: "Surprisingly, the catalytic activity for evolving CO2 from IP was 2.6 times greater than that of bare FeWO4/TiO2 and 4.4 times greater than that of N-TiO2, suggesting that both holes and electrons were essential species in decomposing organic compounds."

For more information on this research see: Novel Coupled Structures of FeWO4/TiO2 and FeWO4/TiO2/CdS Designed for Highly Efficient Visible-Light Photocatalysis. ACS Applied Materials & Interfaces, 2014;6(12):9654-9663. 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 S. Bera, Inha University, Dept. of Chem & Chem Engn, Inchon 402751, South Korea. Additional authors for this research include S.B. Rawal, H.J. Kim and W.I. Lee.

Keywords for this news article include: Asia, Inchon, South Korea, Materials Science

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


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Source: Journal of Technology


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