Self-assembled bundled TiO2 nanowire arrays encapsulated with indium tin oxide for broadband absorption in plasmonic photocatalysis
Literature Information
Xingce Fan, Zhengwei Luo, Xiangyu Hou, Xiaozhi Yang, Teng Qiu, Paul K. Chu
In order to enhance photocatalysis by broadening light harvesting, bundled TiO2 nanowire bundle arrays are encapsulated with indium tin oxide (ITO) by a self-assembly technique involving anodization, electrochemical etching, and ITO deposition. The plasmonic photocatalyst, which has a multiscale structure with variable nanoscale gaps as well as microscale funnels, shows broadband localized surface plasmon resonance absorption of 84% in the wavelength range between 400 and 2500 nm. The improved photocatalytic efficiency is demonstrated by methyl orange degradation under sunlight illumination. The improvement stems from enhanced light harvesting arising from the localized surface plasmon resonance of the ITO membrane which extends the light response to the visible and NIR regions and excites hot charge carriers.
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