Ag@AgI复合N,F共掺杂TiO_2纳米管的制备及其可见光催化性能  

Preparation and photocatalytic activity under visible light of Ag@AgI modified N,F codoped TiO_2 nanotubes

作　　者：范济民[1] 朱力校[1] 龚超[1] 王翠[1] 赵志换[1] 

机构地区：[1]太原理工大学化学化工学院,太原030024

出　　处：《化工新型材料》2016年第1期83-85,共3页New Chemical Materials

基　　金：山西省自然科学基金青年基金(2008021015);山西省社会发展攻关项目(20130313026-5)

摘　　要：采用一步水热合成法制备出氮(N),氟(F)共掺杂TiO_2纳米管,然后通过沉积-沉淀法并结合光还原处理制备出一种新型Ag@AgI复合的N,F共掺杂TiO_2纳米管。结果表明:所制备的催化剂样品具有均匀的纳米管结构,比表面积较大可达210.6m^2/g。由于N,F的掺杂和Ag表面等离子体共振效应使得催化剂的禁带宽度降低到1.9eV,其光吸收边际红移到650nm左右,其在可见光范围的响应明显增强,光生电子-空穴对更容易分离。在波长大于400nm光照射75min,样品对甲基橙催化降解率达到98.2%,循环利用5次样品对甲基橙的催化降解率仍能保持在90%以上,说明该催化剂具有稳定的光催化活性。N,F codoped TiO2 nanotubes were prepared with one-pot hydrothermal synthesis method and then got the new type photocatalyst material of Ag@AgI/N,F-TNTs through deposition-precipitation combined with photoreduction method.The results showed that the prepared photocatalyst material had nanotube structure and its specific surface area was 210.6m^2/g.With surface plasma resonance,the photoabsorption bound had a red shift about to 650 nm,which significantly enhanced the response of the visible light range and the photoinduced electron-hole pairs separated easily.Under visible light（wavelength exceeded 400nm）,the degradation rate of methyl orange remained over 90% when the catalyst reused for five times,which can explain the as synthesized photocatalysts had stable photocatalytic activity.

关 键 词：TiO2 纳米管 Ag@AgI 表面等离子体共振 可见光催化 

分 类 号：O643.36[理学—物理化学]