文献类型：期刊文献

中文题名：NiO_x修饰TiO_2纳米管光催化还原Cr(Ⅵ)离子研究

英文题名：Photoreduction Activity of NiO_x Modified TiO_2 Nanotubes for Cr(Ⅵ)

作者：彭英春[1];龙应钊[1];孙慧萍[1];穆劲[1]

机构：[1]华东理工大学化学系,上海200237

年份：2009

卷号：50

期号：11

起止页码：641

中文期刊名：化学世界

外文期刊名：Chemical World

收录：北大核心:【北大核心2008】；CSCD:【CSCD2011_2012】；

语种：中文

中文关键词：NiOx;TiO2纳米管;Cr(Ⅵ);光催化

外文关键词：NiOx; TiO2 nanotubes; Cr（Ⅵ）; photoeatalysis

摘要：以TiO2纳米粒子(Degussa P25)为原料,经水热处理制得钛酸盐纳米管,通过离子交换将Ni2+插入钛酸盐纳米管,然后通过焙烧及氢气还原处理得到NiOx修饰TiO2纳米管,并考察了该纳米管在紫外光下还原Cr(Ⅵ)的性能。结果表明:经氢气还原处理后,NiOx的修饰能够显著提高TiO2纳米管的光催化还原Cr(Ⅵ)的活性,而未经还原处理的NiO对电子的转移起到了抑制作用。
The Na2TiO3 nanotubes were synthesized by hydrothermal processes using TiO2 nanoparticles （Degussa P25） as raw material. The NiOx modified TiO2 nanotubes were prepared by the methods of ionexchange and pyrolysis, then reduced in hydrogen atmosphere. The photocatalytic activity of the composites was investigated by photoreduction of Cr（Ⅵ） under UV light irradiation. The results showed that the NiOx modified TiO2 nanotubes after reduction have relatively higher photocatalytie activity than TiO2 nanotubes. However, the presence of unredueed NiO inhibits the transfer of electrons.