离子液体-水混合介质中合成N、F共掺杂宽光域响应多孔TiO<sub>2</sub>光催化剂及性能

引用本文: 陈孝云, 陆东芳, 黄锦锋, 卢燕凤, 郑建强. 离子液体-水混合介质中合成N、F共掺杂宽光域响应多孔TiO₂光催化剂及性能[J]. 物理化学学报, 2012, 28(01): 161-169. doi: 10.3866/PKU.WHXB201228161 shu

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

离子液体-水混合介质中合成N、F共掺杂宽光域响应多孔TiO₂光催化剂及性能

基金项目:
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)

摘要: 以TiCl₄为钛源, 离子液体-水为混合溶剂, 采用液相水解-沉淀法制得浅黄色的N、F共掺杂宽光域响应多孔TiO₂光催化剂(TiONF). 以苯酚为模型物, 考察了TiONF在紫外光区、可见光区及太阳光下催化活性. 采用X射线光电子能谱(XPS)、紫外-可见漫反射光谱(DRS)、透射电镜(TEM)、X射线衍射(XRD)、傅里叶变换红外(FTIR)光谱及低温N₂吸附-脱附等技术对TiONF的结构进行表征. 结果表明, 在离子液体-水混合介质中合成适量N、F共掺杂的TiO₂在紫外光区、可见光区及太阳光下均表现出较高的活性, 且高于纯水介质中合成TiONF的活性. 离子液体-水混合介质有利于N、F进入TiO₂晶格中; N、F共掺杂后在TiO₂表面生成Ti―O―N键, 形成新的能级结构, 使催化剂的吸收红移至450-530 nm, 诱发TiO₂可见光催化活性; 同时, N、F共掺杂提高了TiO₂表面羟基数量; 还提高了TiO₂相转变温度, 减缓了相转变速率. 另外, 在离子液体-水混合介质中合成的TiONF较纯水介质中合成的TiONF粒子小、分散性好、比表面积大.

关键词:

English

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: 29 December 2011
Fund Project:
国家自然科学基金(31000269)

福建省高等学校杰出青年科研人才培育计划(JA11072)

福建省教育厅基金(JA10121)资助项目

Abstract: 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.

Key words:

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1.
沈阳化工大学材料科学与工程学院沈阳 110142

离子液体-水混合介质中合成N、F共掺杂宽光域响应多孔TiO₂光催化剂及性能

English

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

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南：你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

离子液体-水混合介质中合成N、F共掺杂宽光域响应多孔TiO2光催化剂及性能

English

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

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

离子液体-水混合介质中合成N、F共掺杂宽光域响应多孔TiO₂光催化剂及性能

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