Citation: CHEN Xiao-Yun, LU Dong-Fang, HUANG Jin-Feng, LU Yan-Feng, ZHENG Jian-Qiang. Preparation and Properties of N-F Co-Doped TiO₂ Photocatalyst with Wide Range Light Response and Multipore Structure from Ionic Liquid-Water Mixture Solvent[J]. Acta Physico-Chimica Sinica, ;2012, 28(01): 161-169. doi: 10.3866/PKU.WHXB201228161 shu

Preparation and Properties of N-F Co-Doped TiO₂ Photocatalyst with Wide Range Light Response and Multipore Structure from Ionic Liquid-Water Mixture Solvent

1.
1. College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002, P. R. China;
2. College of Landscape Architecture, Fujian Agriculture and Forestry University, Fuzhou 350002, P. R. China

Received Date: 16 August 2011
Available Online: 25 October 2011
Fund Project: 国家自然科学基金(31000269) (31000269) 福建省高等学校杰出青年科研人才培育计划(JA11072) (JA11072)福建省教育厅基金(JA10121)资助项目 (JA10121)

A yellow N-F co-doped TiO₂ photocatalyst (TiONF) exhibited high activity over a wide light spectrum range and a multipore structure was prepared by a hydrolysis-precipitation method using an ionic liquid ([Bmim]PF₆)-water mixture as the solvent and TiCl₄ as the precursor. Photocatalytic activity was investigated by the photocatalytic degradation of phenol under ultraviolet (UV), artificial visible (Vis), and solar light irradiation. X-ray photoelectron spectroscopy (XPS), UV-Vis diffuse reflectance spectroscopy (DRS), transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR), spectroscopy, and N₂ adsorption-desorption were used for catalyst characterization. The results show that TiONF synthesis in an ionic liquid-water mixture solvent with suitable N-F doping gives high activity under UV, Vis, and solar light irradiation, and the activities are higher than those obtained by synthesis in pure water. The ionic liquid-water mixture solvent leads to N and F being incorporated into the TiO₂ lattice and N-F co-doping can increase the amount of surface OH^- on TiO₂. The new bandgap formed by N-F doping can induce a second adsorption edge (450-530 nm), which can be excited by Vis irradiation and induce Vis activity. N-F co-doping retards the phase transformation. In addition, an ionic liquid-water mixture as a solvent benefits the dispersion of TiO₂, increases the S_BET and reduces the particle size.
- TiO₂,
- N-F co-doping,
- Ionic liquid,
- Photocatalyst,
- Visible light
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Preparation and Properties of N-F Co-Doped TiO2 Photocatalyst with Wide Range Light Response and Multipore Structure from Ionic Liquid-Water Mixture Solvent

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通讯作者: 陈斌, bchen63@163.com

Preparation and Properties of N-F Co-Doped TiO₂ Photocatalyst with Wide Range Light Response and Multipore Structure from Ionic Liquid-Water Mixture Solvent