催化学报

催化学报 ›› 2009, Vol. 30 ›› Issue (5): 426-432.

• 研究论文 • 上一篇    下一篇

大孔-介孔氮掺杂二氧化钛的制备及其光催化性能测试

景文珩, 王韦岗, 邢卫红   

  1. 南京工业大学化学化工学院材料化学工程国家重点实验室, 江苏南京210009
  • 出版日期:2009-05-25 发布日期:2013-02-05

Preparation and Photocatalytic Activity of Macro-Mesoporous N-Doped TiO2

JING Wenheng, WANG Weigang, XING Weihong*   

  1. State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing 210009, Jiangsu, China
  • Online:2009-05-25 Published:2013-02-05

PDF

909

被引次数

47

摘要： 以嵌段共聚物为模板剂, 甲酰胺为氮源, 结合溶胶凝胶法制备了具有可见光活性的大孔-介孔氮掺杂二氧化钛(N-TiO2)材料. 通过 X 射线衍射、低温 N2 吸附-脱附、扫描电镜、紫外-可见吸收光谱等手段, 考察了嵌段共聚物对样品微结构和可见光活性的影响. 结果表明, 样品主要以锐钛矿相和板钛矿相混合形式存在; 改变嵌段共聚物的浓度, 可以制得晶粒粒径 9~12 nm, 孔径 10~14 nm, 禁带宽度 2.98~2.76 eV 的大孔-介孔 N-TiO2, 且随着模板剂加入量的增加, 大孔孔径增大, 孔壁增厚. 对甲基橙溶液的室内自然光降解实验表明, 大孔-介孔 N-TiO2 具有良好的光催化活性, 随着嵌段共聚物加入量的增加, 样品对甲基橙的降解时间缩短, 降解率提高.

关键词: 嵌段共聚物, 甲酰胺, 二氧化钛, 氮掺杂, 大孔-介孔, 甲基橙, 光催化降解

Abstract: Macro-mesoporous N-doped TiO2 photocatalysts were directly prepared by a sol-gel technique with a block copolymer as template and formamide as solvent. The microstructure, band gap, and photocatalytic activity of the materials were mainly affected by the concentration of the template. When its concentration was 11%, the band gap was 2.76 eV, and the degradation of methyl orange reached 93.2% after 120 min.

Key words: block copolymer, formamide, titanium dioxide, nitrogen doping, macropore, mesopore, methyl orange, photocatalytic degradation