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Reports Outline Photocatalytics Findings from Tohoku University (Dispersed-Nanoparticle Loading Synthesis for Monodisperse Au-Titania Composite...

August 8, 2014



Reports Outline Photocatalytics Findings from Tohoku University (Dispersed-Nanoparticle Loading Synthesis for Monodisperse Au-Titania Composite Particles and Their Crystallization for Highly Active UV and Visible Photocatalysts)

By a News Reporter-Staff News Editor at Science Letter -- Current study results on Photocatalytics have been published. According to news reporting from Miyagi, Japan, by NewsRx journalists, research stated, "Submicrometer-sized amorphous titania spheres incorporating Au nanoparticles (NPs) were prepared titanium(IV) isopropoxide in the presence of chloroauric acid in a one-pot synthesis consisting of a sol gel reaction of and a successive reduction with sodium borohydride in a mixed solvent of ethanol/acetonitrile. The synthesis was allowed to prepare monodisperse titania spheres that homogeneously incorporated Au NPs with sizes of ca. 7 nm."

The news correspondents obtained a quote from the research from Tohoku University, "The Au NP-loaded titania spheres underwent different crystallization processes, including 500 degrees C calcination in air, high-temperature hydrothermal treatment (HHT), and/or low-temperature hydrothermal treatment (LHT). Photocatalytic experiments were conducted with the Au NP-loaded crystalline titania spheres under irradiation of UV and visible light. A combined process of LHT at 80 degrees C followed by calcination at 500 degrees C could effectively crystallize titania spheres maintaining the dispersion state of Au NPs, which led to photocatalytic activity higher than that of commercial P25 under UV irradiation. Under visible light irradiation, the Au NP-titania spheres prepared with a crystallization process of LHT at 80 degrees C for 6 h showed photocatalytic activity much higher than a commercial product of visible light photocatalyst."

According to the news reporters, the research concluded: "Structure analysis of the visible light photocatalysts indicates the importance of prevention of the Au NPs aggregation in the crystallization processes for enhancement of photocatalytic activity."

For more information on this research see: Dispersed-Nanoparticle Loading Synthesis for Monodisperse Au-Titania Composite Particles and Their Crystallization for Highly Active UV and Visible Photocatalysts. Langmuir, 2014;30(24):7244-7250. Langmuir can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society - www.acs.org; Langmuir - www.pubs.acs.org/journal/langd5)

Our news journalists report that additional information may be obtained by contacting T. Sakamoto, Tohoku University, Grad Sch Engn, Aoba Ku, Sendai, Miyagi 9808579, Japan. Additional authors for this research include D. Nagao, M. Noba, H. Ishii and M. Konno (see also Photocatalytics).

Keywords for this news article include: Asia, Japan, Miyagi, Photocatalyst, Nanotechnology, Emerging Technologies

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


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Source: Science Letter


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