New Photoelectrochemicals Findings from Industrial Technology Research Institute Described (Surface Passivation of TiO2 Nanowires Using a Facile Precursor-Treatment Approach for Photoelectrochemical Water Oxidation)
By a News Reporter-Staff News Editor at Biotech Week -- Investigators discuss new findings in Biotechnology. According to news reporting originating from Hsinchu, Taiwan, by NewsRx correspondents, research stated, "We developed a facile precursor-treatment approach for effective surface passivation of rutile TiO2 nanowire photoanode to improve its performance in photoelectrochernical (PEC) water oxidation. The approach was demonstrated by treating rutile TiO2 nanowires with titanium precursor solutions (TiCl4, Ti(OBu)(4), or Ti(OiP)(4)) followed by a postannealing process, which resulted in the additional deposition of anatase TiO2 layer on the nanowire surface."
Our news editors obtained a quote from the research from Industrial Technology Research Institute, "Compared to pristine TiO2, all the precursor-treated TiO2 nanowire electrodes exhibited a significantly enhanced photocurrent density under white light illumination. Among the three precursor-treated samples, Ti(OBu)(4)-treated TiO2 nanowires achieved the largest enhancement of photocurrent generation, which is approximately a 3-fold increase over pristine TiO2. Monochromatic incident photon-to-electron conversion efficiency (IPCE) measurements showed that the improvement of PEC performance was dominated by the enhanced photoactivity of TiO2 in the UV region. The photovoltage and electrochemical impedance spectroscopy (EIS) measurements showed that the enhanced photoactivity can be attributed to the improved charge transfer as a result of effective surface state passivation. This work demonstrates a facile, low-cost, and efficient method for preparing highly photoactive TiO2 nanowire electrodes for PEC water oxidation."
According to the news editors, the research concluded: "This approach could also potentially be used for other photoconversion applications, such as TiO2 based dye-sensitized solar cells, as well as photocatalytic systems."
For more information on this research see: Surface Passivation of TiO2 Nanowires Using a Facile Precursor-Treatment Approach for Photoelectrochemical Water Oxidation. Journal of Physical Chemistry C, 2014;118(27):15086-15094. Journal of Physical Chemistry C can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society - www.acs.org; Journal of Physical Chemistry C - www.pubs.acs.org/journal/jpccck)
The news editors report that additional information may be obtained by contacting Y.C. Pu, Ind Technol Res Inst, Green Energy & Environm Res Labs, Hsinchu 31040, Taiwan. Additional authors for this research include Y.C. Ling, K.D. Chang, C.M. Liu, J.Z. Zhang, Y.J. Hsu and Y. Li (see also Biotechnology).
Keywords for this news article include: Asia, Biotechnology, Taiwan, Hsinchu, Nanowire, Nanotechnology, Photoelectrochemical, Emerging Technologies
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