物理化学学报 >> 2007, Vol. 23 >> Issue (07): 1037-1041.doi: 10.3866/PKU.WHXB20070714

研究论文 上一篇    下一篇

铁、氮共掺杂二氧化钛薄膜的亲水性能

黄东升; 曾人杰; 陈朝凤; 李玉花   

  1. 厦门大学化学化工学院, 固体表面物理化学国家重点实验室, 福建 厦门 361005
  • 收稿日期:2007-01-24 修回日期:2007-03-22 发布日期:2007-07-03
  • 通讯作者: 曾人杰 E-mail:rjzeng@xmu.edu.cn

Hydrophilicity of TiO2 Thin Films Codoped with Iron and Nitrogen

HUANG Dong-Sheng; ZENG Ren-Jie; CHEN Chao-Feng; LI Yu-Hua   

  1. State Key Laboratory for Physical Chemistry of Solid Surfaces, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian Province, P. R. China
  • Received:2007-01-24 Revised:2007-03-22 Published:2007-07-03
  • Contact: ZENG Ren-Jie E-mail:rjzeng@xmu.edu.cn

摘要: 采用溶胶-凝胶法制备了铁掺杂TiO2(Fe-TiO2)薄膜, 将Fe-TiO2薄膜放置氨气气氛中高温处理, 形成铁、氮共掺杂TiO2(Fe/N-TiO2)薄膜. 通过XRD、XPS、SEM、UV-Vis法进行吸收光谱分析及薄膜表面亲水接触角分析, 研究了铁、氮掺杂浓度, 热处理温度, 膜厚等因素对薄膜亲水性能的影响. 结果表明, Fe/N-TiO2(0.5%Fe, 摩尔百分数)显示出更佳的亲水性能, 在可见光下优势尤为明显. 铁掺杂主要作用是降低电子和空穴的复合几率, 氮掺杂可以增强TiO2薄膜在可见光区的吸收, 两种效应相互结合, 共同提高了薄膜在可见光下的亲水性能.

关键词: 溶胶-凝胶法, 铁、氮共掺杂, 二氧化钛, 亲水性

Abstract: TiO2 doped with iron (Fe-TiO2) thin films were synthesized using sol-gel method. TiO2 codoped with iron and nitrogen (Fe/N-TiO2) thin films were prepared by calcining Fe-TiO2 thin films in ammonia atmosphere. The influence of iron and nitrogen doping concentration, heat-treatment temperature and film thickness on the hydrophilicity of the films were studied by XRD, XPS, SEM, UV-Vis spectra and measured water contact angle. The results indicated that Fe/N-TiO2 (0.5%Fe,molar percent) films were optimumin hydrophilicity, especially under visible-light irradiation. Doping iron mostly reduced the recombination of electrons and holes, and doping nitrogen in TiO2 enhances photoresponse in visible-light region. The hydrophilicity benefited fromboth effects.

Key words: Sol-gel method, Iron and nitrogen codoping, Titania, Hydrophilicity

MSC2000: 

  • O643