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- Title
Nano-sized ZnO supported on poly(triazine imide) nanotube for visible light driven photocatalytic reduction of Cr(VI).
- Authors
Yan, Xin; Qin, Jie; Gao, Qiang; Ye, Zimeng; Ai, Tao; Su, Xinghua; Wang, Zhenjun
- Abstract
The poly(triazine imide) (PTI) nanotube/ZnO heterojunction was prepared by two step method. PTI nanotube was synthesized from the condensation of melamine in a salt melt of LiCl-KCl. Then, nano-sized ZnO supported on PTI nanotube was prepared by a chemical precipitation method. The reduction rate of Cr(VI) under visible light irradiation was used to evaluate the activity of photocatalyst. It was found that the PTI/ZnO-1.5 wt% heterojunction exhibits the highest photocatalytic activity, which can reduce almost all Cr(VI) within 120 min. The kinetic constant of reduction reaction with PTI/ZnO-1.5 wt% heterojunction (0.0291 min− 1) is about 6 times as high as that of the PTI (0.00443 min− 1). A possible photocatalytic mechanism was discussed on the basis of the energy-band theory and scavenger experiments. Results show that photo-induced electrons participated in the reduction of Cr(VI) solution over the PTI/ZnO heterojunction. The enhanced photocatalytic activities of heterojunction can be attributed to efficient charge separation and good interfacial contact between PTI and ZnO.
- Subjects
HETEROJUNCTIONS; ZINC oxide synthesis; NANOTUBES; NANOSTRUCTURED materials synthesis; PHOTOREDUCTION; MELAMINE; PHOTOCATALYSTS
- Publication
Journal of Materials Science: Materials in Electronics, 2018, Vol 29, Issue 22, p19509
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-018-0081-2