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掺杂Cu的TiO2纳米粒子的制备、表征及其光催化活性
引用本文:辛柏福,井立强,付宏刚,孙志华,任志宇,王百齐,蔡伟民.掺杂Cu的TiO2纳米粒子的制备、表征及其光催化活性[J].高等学校化学学报,2004,25(6):1076-1080.
作者姓名:辛柏福  井立强  付宏刚  孙志华  任志宇  王百齐  蔡伟民
作者单位:1. 黑龙江大学化学化工与材料学院, 哈尔滨 150080
2. 黑龙江大学化学化工与材料学院, 哈尔滨 150080;哈尔滨工业大学环境科学与工程系, 哈尔滨 150001
3. 哈尔滨工业大学环境科学与工程系, 哈尔滨 150001
基金项目:国家自然科学基金(批准号: 20171016; 20301006)、教育部重点项目计划(批准号: 02051)、黑龙江省杰出青年科学基金(2002)、黑龙江省自然科学基金(批准号: B0305)、黑龙江省科学技术计划项目(批准号: WB02103)、黑龙江大学杰出青年基金(批准号: JC200308)和黑龙江省教育厅科学技
摘    要:采用Sol-gel法制备了纯的和掺杂不同量Cu的TiO2纳米粒子,并用TG-DTA,XRD,XPS,UV-Vis和荧光光谱对样品进行了表征,考察焙烧温度和Cu含量对TiO2纳米粒子的性质及光催化活性的影响,初步探讨了Cu的掺杂对TiO2相变的作用机制及样品荧光光谱与光催化活性的关系.结果表明,Cu2+的掺杂对TiO2的相变有很大的促进作用,并使其光谱响应范围向可见光区拓展.Cu的掺杂未引起新的荧光现象,但适量Cu的掺杂能够降低TiO2纳米粒子的荧光强度.此外,在光催化降解苯酚的实验中,于500℃处理的掺杂Cu的TiO2纳米粒子的光催化活性较高,与表征结果一致.而掺杂不同量Cu的TiO2的光催化活性顺序与样品荧光光谱强度的顺序相反,即荧光光谱强度越低,其光催化活性越高.

关 键 词:TiO2  掺杂  Cu  荧光光谱  光催化
文章编号:0251-0790(2004)06-1076-05
收稿时间:2003-11-11

Preparation and Characterization of Cu Doped TiO2 Nanoparticles and Their Photocatalytic Activity
XIN Bai-Fu,JING Li-Qiang,FU Hong-Gang,SUN Zhi-Hua,REN Zhi-Yu,WANG Bai-Qi,CAI Wei-Min.Preparation and Characterization of Cu Doped TiO2 Nanoparticles and Their Photocatalytic Activity[J].Chemical Research In Chinese Universities,2004,25(6):1076-1080.
Authors:XIN Bai-Fu  JING Li-Qiang  FU Hong-Gang  SUN Zhi-Hua  REN Zhi-Yu  WANG Bai-Qi  CAI Wei-Min
Institution:1. School of Chemistry and Materials Science, Heilongjiang University, Harbin 150080, China;
2. Department of Environmental Sciences and Engineering, Harbin Institute of Technology, Harbin 150001, China
Abstract:In this work,pure and Cu doped TiO2 nanoparticles with different molar fractions of Cu were prepared by a sol-gel process,and were characterized by means of XRD,TG-DTA,XPS,DRS and FS spectra. We mainly investigated the effects of calcining temperature and Cu content on the properties and the photocatalytic activity of as-prepared TiO2 samples,and also discussed the relationships between FS spectra and photocatalytic activity as well as the mechanisms of Cu doping on TiO2 phase transformation. The results showed that Cu2+ dopant greatly promoted TiO2 phase transformation,and made the optic response range of TiO2 nanoparticles expand to the visual light,Cu dopant did not give rise to new FS phenomena,but it could make the FS intensity decrease with an appropriate Cu content. Moreover,in the experiment of photocatalytic degradation phenol,Cu doped TiO2 nanoparticles calcined at 500 ℃ exhibited a higher photocatalytic activity,corresponding to the characterization results. The order of photocatalytic activity of Cu doped TiO2 samples with different molar fractions of Cu was opposite to the orders of their PL intensity,namely,the weaker the PL intensity,the higher the photocatalytic activity. This could be explained by the points that the dopant Cu2+ could capture photoinduced electrons not only to make the FS intensity decrease during the process of photoluminescence but also to promote the oxidation of organic pollutants during the process of photocatalytic reaction.
Keywords:TiO_2  Doping  Cu  Fluorescence spectrum  Photocatalysis
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