Study on Morphological Distribution of Photogenerated Superoxide Radicals Produced by Different Crystal Titanium Dioxide
10.11895/j.issn.0253-3820.171378
- VernacularTitle:二氧化钛光催化产生超氧自由基的形态分布研究
- Author:
Dan WANG
1
;
Xia Li ZHAO
;
Hui ZHANG
;
Hong Liang GUO
Author Information
1. 中国科学院生态环境研究中心 环境化学与生态毒理国家重点实验室
- Keywords:
Titanium dioxide;
Photocatalytic reaction;
Superoxide radical;
Morphological distribution
- From:
Chinese Journal of Analytical Chemistry
2017;45(12):1882-1887
- CountryChina
- Language:Chinese
-
Abstract:
Superoxide radical ( O·-2 ) , is one of reactive oxygen species ( ROS ) produced in TiO2 photocatalytic reactions, and plays an important role in the photodegradation of pollutants. In this work, we constructed two different procedures to study the generation of total O·-2 and surface-adsorbed O·-2 during TiO2 photocatalytic reaction using nitroblue tetrazolium ( NBT) as capture probe. Furthermore, three different TiO2 ( anatase, rutile and P25 ) were selected as model, and O·-2 generation and its existence form were all studied. The results showed that the generation of total O·-2 was followed by the order P25> anatase> rutile, but the surface-adsorbed O·-2 was nearly the same. The study of surface-adsorbed ROS is very important due to their probably persistence for the pollutants photodegradation or antibacterial activity.
