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›› 2008, Vol. 8 ›› Issue (1): 172-176.

• 材料工程专栏 • 上一篇    下一篇

N/TiO2光催化剂的制备及掺杂过程分析

唐建军,王岳俊,谢炜平,邹原,周康根   

  1. 深圳职业技术学院建筑与环境工程学院
  • 出版日期:2008-02-20 发布日期:2008-02-20

Preparation of N-doped TiO2 Photocatalyst and Analysis of Doping Process

TANG Jian-jun,WANG Yue-jun,XIE Wei-ping,ZOU Yuan,ZHOU Kang-gen   

  1. School of Construction and Environmental Engineer, Shenzhen Polytechnic
  • Online:2008-02-20 Published:2008-02-20

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被引次数

29

摘要： 以饱和尿素溶液水解沉淀钛酸四丁酯制备水合TiO2，再于400~700℃的空气气氛下煅烧2 h，制得淡黄色的N/TiO2光催化剂. 对N/TiO2光催化剂的物相、粒径、比表面积及光吸收性能进行了测试和表征，结果表明，样品的粒径为10~30 nm，比表面积为30~70 m2/g，能吸收400 nm以上的可见光；N/TiO2光催化剂在波长420 nm的荧光灯激发下，经180 min对2,4-二氯苯酚的光催化降解率超过40%. 通过TG-DTA, FT-IR及XPS等测试，分析了N/TiO2光催化剂的氮掺杂过程，表明掺杂氮源均匀存在于水合TiO2中，并在TiO2从无定型转为锐钛矿型的过程中以T?-N化学键的形式进入了TiO2的晶格.

关键词: 光催化剂, TiO2, 掺氮, 可见光催化活性

Abstract: N-doped TiO2 photocatalyst was prepared by calcination of hydrated titanium dioxide using saturated urea solution as precipitant in air atmosphere. The obtained yellow samples were characterized by XRD, BET and UV-Vis techniques, and the results indicated that their grain sizes were 10~30 nm, and specific surface areas 30~70 m2/g, which could absorb visible light wavelength above 400 nm. Photocatalysis results with N-doped TiO2 as photocatalyst showed that over 40% of 2,4-dicholophenol could be degraded after 3 h reaction when using a fluorescent lamp with the main wavelength of 420 nm as the light source. The nitrogen doping process was analysed with TG-DTA, FT-IR and XPS techniques, the results indicated that nitrogen element distributed uniformly in the precursor, and nitrogen was doped into TiO2 lattice in the form of Ti?N bond when the crystalline structure of TiO2 was changed from amorphous to anatase phase.

Key words: photocatalyst, TiO2, nitrogen doping, visible light photocatalytic activity