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Findings from H. Hagiwara and Colleagues Update Understanding of Biological Pigments (Dye Modification Effects on TaON for Photocatalytic Hydrogen...

August 26, 2014



Findings from H. Hagiwara and Colleagues Update Understanding of Biological Pigments (Dye Modification Effects on TaON for Photocatalytic Hydrogen Production from Water)

By a News Reporter-Staff News Editor at Life Science Weekly -- Research findings on Biological Factors are discussed in a new report. According to news reporting originating from Fukuoka, Japan, by NewsRx correspondents, research stated, "Modification effects of porphyrin dyes on the photocatalytic activity of tantalum (oxy)nitride (TaON) were investigated. The nitrogen content in tantalum (oxy)nitride was increased by increasing the heat treatment period."

Our news editors obtained a quote from the research, "The optimized nitridation conditions were found to be calcination at 800 degrees C for 14 h under a NH3 gas flow (25 mL min(-1)). Among the porphyrin dyes examined, pentamethylene bis[4-(10,15,20-triphenylporphine-5-yl)benzoate]-dizinc (II) (Zn-TPPD) showed the most positive effect on the photocatalytic activity of TaON for H-2 production from Na2S aqueous solution. From the results of the photocatalytic reaction using various combinations of catalyst components, it was found that the modification dye and PtOx co-catalysts were necessary to achieving photocatalytic H-2 formation. In the PtOx/Zn-TPPD/TaON photocatalyst, the expected charge transfer mechanism was a two-step excitation of both TaON and Zn-TPPD, and the oxidation and reduction sites were TaON and PtOx co-catalyst, respectively."

According to the news editors, the research concluded: "These results indicate that dye modification has the potential to improve the photocatalytic activity of various (oxy)nitride photocatalysts."

For more information on this research see: Dye Modification Effects on TaON for Photocatalytic Hydrogen Production from Water. Catalysts, 2013;3(3):614-624. Catalysts can be contacted at: Mdpi Ag, Postfach, Ch-4005 Basel, Switzerland (see also Biological Factors).

The news editors report that additional information may be obtained by contacting H. Hagiwara, Int Inst Carbon Neutral Energy Res I2CNER, Nishi Ku, Fukuoka 8190395, Japan. Additional authors for this research include M. Nagatomo, C. Seto, S. Ida and T. Ishiahara.

Keywords for this news article include: Asia, Japan, Fukuoka, Porphyrins, Photocatalyst, Nanotechnology, Photocatalytic, Biological Factors, Biological Pigments, 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: Life Science Weekly


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