期刊
APPLIED CLAY SCIENCE
卷 199, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.clay.2020.105885
关键词
Chrysotile; ZnO; Band gap; Photocatalytic activity; Surface passivation; Interfacial action
资金
- national natural science foundation of China [51704116]
- Hunan province natural science foundation of China [2018JJ3252]
- Scientific research project of Hunan province department of education [19A264]
- planned science and technology project of Hunan province, China [2016TP1028]
- China postdoctoral science foundation [2017M 612582]
A novel type of chrysotile@ZnO nanocomposite was prepared by ZnO nanoparticles generated on the surface of chrysotile to improve its utility and tune the band gap and property of ZnO nanoparticles. XRD, SEM, TEM, BET, PL and UV-vis were used to study the phase, morphology, microstructure and properties of the nanocomposite. The study of its photo-degradation performance took methylene blue (MB) as an organic dye model. Compared with chrysotile and ZnO nanoparticles, chrysotile@ZnO nanocomposite has a narrower band gap (1.91 eV) and stronger photo-catalytic activity. The results showed that the synergistic effect of surface passivation and interfacial action of chrysotile reduced the band gap and photon-hole recombination rate of ZnO nanoparticles, to enhance photo-degradability of organic pollutants and meanwhile endowed chrysotile with new performance. This work is novel and can be used as a basic experimental reference for the functionalization of clay minerals and the development of highly active supported catalysts.
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