Photoelectrochemical switch based on cis-Azobenzene chromophore modified TiO2 nanowires |
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| Authors: | Xiaojun Lv Haixin Chang |
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| Institution: | a Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, PR Chinab Department of Chemistry, Key Lab. of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University, Beijing 100084, Chinac WPI-Advanced Institute for Materials Research, Tohoku University, Sendai 980-8578, Japan |
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| Abstract: | Carboxylated-azobenzene chromophore modified TiO2 nanowire composites were prepared and characterized. Photocurrent measured with monochromatic incident light irradiation results showed that azobenzene modified TiO2 nanowire electrode had obviously higher photocurrent and broader visible light response covering range of 350-650 nm, and the wavelength position corresponding to the maximum photocurrent was red shift to about 470 nm. After alternate irradiation with UV and visible light, the azobenzene modified TiO2 nanowire electrode exhibited obvious photoelectrochemical switching properties. Furthermore, the photocurrent under visible light irradiation was much higher than that under UV irradiation due to the cis-to-trans isomerization transformation of azobenzene chromophore. |
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| Keywords: | TiO2 nanowires Azobenzene modified Photoelctrochemical switch Higher photocurrent |
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