Citation: WANG Dan, ZHAO Li-Xia, ZHANG Hui, GUO Liang-Hong. Study on Morphological Distribution of Photogenerated Superoxide Radicals Produced by Different Crystal Titanium Dioxide[J]. Chinese Journal of Analytical Chemistry, ;2017, 45(12): 1882-1887. doi: 10.11895/j.issn.0253-3820.171378 shu

Study on Morphological Distribution of Photogenerated Superoxide Radicals Produced by Different Crystal Titanium Dioxide

State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China

Corresponding author: ZHAO Li-Xia, zlx@rcees.ac.cn
Received Date: 25 October 2017
Accepted Date: 4 November 2017

Fund Project: the National Key Research and Development Program of China 2016YFA0203102the Chinese Academy of Sciences XDB14040100the National Natural Science Foundation of China 21577156the National Natural Science Foundation of China 21677152This work was supported by the National Key Research and Development Program of China (No. 2016YFA0203102), the Chinese Academy of Sciences (No. XDB14040100), and the National Natural Science Foundation of China (Nos. 21677152, 91543203, 21577156)the National Natural Science Foundation of China 91543203

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Superoxide radical (O₂^·-), 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 O₂^·- and surface-adsorbed O₂^·- during TiO₂ photocatalytic reaction using nitroblue tetrazolium (NBT) as capture probe. Furthermore, three different TiO₂ (anatase, rutile and P25) were selected as model, and O₂^·- generation and its existence form were all studied. The results showed that the generation of total O₂^·- was followed by the order P25> anatase> rutile, but the surface-adsorbed O₂^·- 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.
- Titanium dioxide,
- Photocatalytic reaction,
- Superoxide radical,
- Morphological distribution
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