Synthesis of yellow mesoporous Ni-doped TiO2 with enhanced photoelectrochemical performance under visible light

Bin Gao; Tao Wang; Xiaoli Fan; Hao Gong; Hu Guo; Wei Xia; Yaya Feng; Xianli Huang; Jianping He

doi:10.1039/C6QI00609D

Synthesis of yellow mesoporous Ni-doped TiO₂ with enhanced photoelectrochemical performance under visible light†

Bin Gao,^a Tao Wang,

*^a Xiaoli Fan,^a Hao Gong,^a Hu Guo,^a Wei Xia,^a Yaya Feng,^a Xianli Huang^a and Jianping He*^a

Author affiliations

* Corresponding authors

^a College of Materials Science and Technology, Jiangsu Key Laboratory of Materials and Technology for Energy Conversion, Nanjing University of Aeronautics and Astronautics, 210016 Nanjing, PR China
E-mail: wangtao0729@nuaa.edu.cn, jianph@nuaa.edu.cn
Fax: +86 25 52112626
Tel: +86 25 52112906

Abstract

A novel ordered mesoporous Ni-doped TiO₂ was successfully prepared via an in situ sol–gel method. TEM and SEM images showed that the synthesized material had a highly ordered and uniform mesoporous structure. EDS and XPS confirmed that the nickel element was doped into the TiO₂ crystal lattice homogeneously in the form of Ni²⁺ ions. Meanwhile, the doping of Ni changed the positions of the energy bands of TiO₂, resulting in the decrease of the band gap, and enhanced the absorption of visible light. Moreover, due to the defect sites induced by doping which could cause recombination of electrons and holes, different doping amounts were investigated in order to achieve optimized parameters. As a result, when the molar ratio of Ni/Ti was 0.01, the ordered mesoporous Ni-doped TiO₂ exhibited the highest photocurrent density of 3.1 μA cm⁻² at 1.3 V (vs. RHE) under visible light irradiation.

This article is part of the themed collection: Inorganic Chemistry Frontiers HOT articles for 2017

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Article information

DOI: https://doi.org/10.1039/C6QI00609D
Article type: Research Article
Submitted: 27 Dec 2016
Accepted: 16 Feb 2017
First published: 16 Feb 2017

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Inorg. Chem. Front., 2017,4, 898-906

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Synthesis of yellow mesoporous Ni-doped TiO₂ with enhanced photoelectrochemical performance under visible light

B. Gao, T. Wang, X. Fan, H. Gong, H. Guo, W. Xia, Y. Feng, X. Huang and J. He, Inorg. Chem. Front., 2017, 4, 898 DOI: 10.1039/C6QI00609D

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