Solid-Phase Photocatalytic Degradation of Polystyrene

被引：0

作者：

Xie Z. ^{[1
]}

Yang M. ^{[1
]}

Jiang L. ^{[1
]}

Dan Y. ^{[1
]}

机构：

[1] State Key Laboratory of Polymer Materials Engineering of China, Sichuan University, Polymer Research Institute of Sichuan University, Chengdu

来源：

Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | 2019年 / 35卷 / 03期

关键词：

Degradation; Nano-titania; Polystyrene; Solid-phase photocatalytic;

D O I：

10.16865/j.cnki.1000-7555.2019.0070

中图分类号：

学科分类号：

摘要：

Using titania nanoparticles (TiO 2 ) with anatase-rutile hybrid crystal type as photo-catalyst, the solid-phase photocatalytic degradation of polystyrene (PS) and its blends with TiO 2 (PS/TiO 2 ) after irradiating under 250W metal halide lamp were comparably investigated by the measurements of mass loss, TGA, GC, UV-vis, 1 H-NMR and GPC. The results show that the pure PS remains stable even after irradiation for 100 h, while, after irradiation for 40 h, PS/TiO 2 suffers polymer chain scission (the relative weight average molecular mass decreases from 3.2×10 5 to 2.2×10 5 ), oxidation (the 1H-NMR detects a chemical shift of H belonging to the hydrogen atom connecting with carbonyl groups), and at last mineralization into CO 2 and H 2 O (in PS/TiO 2 , the more mass loss, the new small molecule compounds and the more CO 2 are monitored). The study demonstrates that, in the solid-phase, TiO 2 can promote the degradation of PS via light irradiation. This may provides a new idea for the purification of plastic wastes. © 2019, Editorial Board of Polymer Materials Science & Engineering. All right reserved.

引用

页码：48 / 52

页数：4

共 11 条

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