One-step calcination method for synthesis of mesoporous g-C3N4/NiTiO3 heterostructure photocatalyst with improved visible light photoactivity

Hui Wang; Xingzhong Yuan; Hou Wang; Xiaohong Chen; Zhibin Wu; Longbo Jiang; Weiping Xiong; Yaxin Zhang; Guangming Zeng

doi:10.1039/C5RA18117H

One-step calcination method for synthesis of mesoporous g-C₃N₄/NiTiO₃ heterostructure photocatalyst with improved visible light photoactivity†

Hui Wang,^ab Xingzhong Yuan,*^ab Hou Wang,^ab Xiaohong Chen,^c Zhibin Wu,^ab Longbo Jiang,^ab Weiping Xiong,^ab Yaxin Zhang^ab and Guangming Zeng^ab

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* Corresponding authors

^a College of Environmental Science and Engineering, Hunan University, Changsha 410082, P. R. China
E-mail: yxz@hnu.edu.cn
Fax: +86 731 88823701
Tel: +86 731 88821413

^b Key Laboratory of Environment Biology and Pollution Control, Hunan University, Ministry of Education, Changsha 410082, P. R. China

^c Collaborative Innovation Center of Resource-Conserving & Environment-Friendly Society and Ecological Civilization, Changsha 410083, P. R. China

Abstract

A novel g-C₃N₄/NiTiO₃ composite was fabricated by one-step calcination method using dicyandiamide, tetrabutyl titanate and nickel acetate as the precursors. The samples were characterized by scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, N₂ adsorption/desorption isotherms, UV-vis diffuse reflection spectroscopy and photoluminescence spectroscopy. It was indicated that the hybrids owned a large surface area, mesoporous structure and improved visible light absorption. The optimal g-C₃N₄ content in the g-C₃N₄/NiTiO₃ composite was 18.4 wt%, and the corresponding visible-light removal rate for nitrobenzene was 0.0132 min⁻¹, about 1.6 times higher than that of pure NiTiO₃. The enhanced photocatalytic activity may be attributed to the large surface area, stronger absorption in the visible region and efficient electron–hole separation.

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Article information

DOI: https://doi.org/10.1039/C5RA18117H
Article type: Communication
Submitted: 05 Sep 2015
Accepted: 25 Oct 2015
First published: 26 Oct 2015

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RSC Adv., 2015,5, 95643-95648

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One-step calcination method for synthesis of mesoporous g-C₃N₄/NiTiO₃ heterostructure photocatalyst with improved visible light photoactivity

H. Wang, X. Yuan, H. Wang, X. Chen, Z. Wu, L. Jiang, W. Xiong, Y. Zhang and G. Zeng, RSC Adv., 2015, 5, 95643 DOI: 10.1039/C5RA18117H

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