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Vol. 26 No. 17 (2014): Vol 26 Issue 17

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High Visible Response of Vertical TiO2 Nanoclusters-CdSe Linked by Cysteine

https://doi.org/10.14233/ajchem.2014.18154
Fu Fang Zhou
School of Physics and Technology and MOE Key Laboratory of Artificial Micro- and Nano-structures, Wuhan University, Wuhan 430072, P.R. China ; College of Physics & Electronic Information, Yunnan Normal University, Kunming 650500, P.R. China
Delong Li
School of Physics and Technology and MOE Key Laboratory of Artificial Micro- and Nano-structures, Wuhan University, Wuhan 430072, P.R. China
Wenhui Wu
School of Physics and Technology and MOE Key Laboratory of Artificial Micro- and Nano-structures, Wuhan University, Wuhan 430072, P.R. China
Liuying Zhao
College of Physics & Electronic Information, Yunnan Normal University, Kunming 650500, P.R. China
Ping Wang
College of Chemistry & Chemical Industry, Yunnan Normal University, Kunming 650500, P.R. China
Yuan Ming Huang
School of Mathematics and Physics, Changzhou University, Jiangsu 213164, P.R. China
Chunxu Pan
School of Physics and Technology and MOE Key Laboratory of Artificial Micro- and Nano-structures, Wuhan University, Wuhan 430072, P.R. China

Corresponding Author(s) : Yuan Ming Huang

dongshanisland@126.com

Asian Journal of Chemistry, Vol. 26 No. 17 (2014): Vol 26 Issue 17

Abstract

Vertically oriented single-crystal TiO2 nanoclusters in tetramethylammonium hydroxide solution were synthesized hydrothermally directly on Ti substrate. N-Type semiconducting CdSe nanoparticles were then introduced deep coating TiO2 nanocrystalss via a two-step procedure using cystein as a surface coupling agent, followed by a subsequent electrodeposition process from selenosulfite to form orderly interconnecting heterojunctions. A key result achievement is that although the TiO2nanocrystalss are less than 1 μm long, under the help of the bifunctional 2-amino-3-sulfhydrylpropanoic acid molecule linking the acceptor and donor materials, the virtue of strong visible absorption of single crystal TiO2 nanoclusters were fully developed in addition of ultraviolet, so that the heterojunction electrode exhibits excellent photoresponse in photoelectrochemical cells to visible lights, whose contribution is rather significant compared with that of ultraviolet lights. Vertical nanoclusters have advantages of leading electrons directly into the metal Ti substrate while maintaining the large surface area towards the electrolyte. These highly ordered nanohybrids are expected to have potential applications in photochemical solar cells with high efficiency.

Keywords

TiO2 nanocluster CdSe Vertically oriented Visible lights Sensitization
Fang Zhou, F., Li, D., Wu, W., Zhao, L., Wang, P., Ming Huang, Y., & Pan, C. (2014). High Visible Response of Vertical TiO2 Nanoclusters-CdSe Linked by Cysteine. Asian Journal of Chemistry, 26(17), 5557–5562. https://doi.org/10.14233/ajchem.2014.18154
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