期刊
APPLIED SURFACE SCIENCE
卷 435, 期 -, 页码 799-808出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2017.11.195
关键词
TiO2 IOPCs; Ordered porous structure; 3D multilayer; UCNPs sensitization; Photocatalytic water purification
类别
资金
- Doctoral Foundation of Natural Science Foundation of Shandong Province [ZR2017BEM013]
- Primary Research AMP
- Development Plan of Shandong Province [2017GNC13110]
A novel porous monolayer inverse opal (IO) structure was prepared by a simple sol-gel method combined with a self-assembly PS photonic crystal (PC) as template. By prolonging deposition time of PS spheres, three-dimensional multilayer TiO2 IOPC was also fabricated. Up-conversion nanoparticles (UCNPs) were selected to sensitize TiO2 IOPCs. Photocatalytic activity of as-prepared materials was investigated by disinfection of bacteria and organic pollutant degradation. Under NIR light irradiation, a large improvement in bacterial inactivation and photodegradation efficiency could be seen for NYF/TiO2 composites in comparison with other samples. As for monolayer NYF/TiO2, water disinfection of 100% inactivation of bacteria is realized within 11 h and kinetic constant of RhB degradation is 0.133 h(-1), which is about 10 times higher than that of pure TiO2 IOPCs. Reasons of enhanced photocatalytic activity were systematically investigated and a possible mechanism for NIR-driven photocatalysis was reasonably proposed. (C) 2017 Elsevier B.V. All rights reserved.
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