High photocatalytic degradation activity of the polyvinyl chloride (PVC)-vitamin C (VC)-TiO2 nano-composite film

被引：77
|
作者：
Yang, Changjun [1 ]
Gong, Chuqing [1 ]
Peng, Tianyou [1 ]
Deng, Kejian [2 ,3 ]
Zan, Ling [1 ]
机构：
[1] Wuhan Univ, Coll Chem & Mol Sci, Wuhan 430072, Peoples R China
[2] S Cent Univ Nationalities, State Ethn Affairs Commiss, Key Lab Catalysis & Mat Sci, Wuhan 430074, Peoples R China
[3] S Cent Univ Nationalities, Minist Educ, Wuhan 430074, Peoples R China
来源：
JOURNAL OF HAZARDOUS MATERIALS | 2010年 / 178卷 / 1-3期
基金：
中国国家自然科学基金;
关键词：
Solid-phase photocatalytic degradation; Nano-TiO2; Vitamin C; Polyvinyl chloride; TIO2; THIN-FILMS; POLY(VINYL CHLORIDE); SURFACE MODIFICATION; FLY-ASH; PVC; POLYSTYRENE; DIOXINS; ACID; INCINERATION; OXIDATION;
D O I：
10.1016/j.jhazmat.2010.01.056
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
A novel photodegradable polyvinyl chloride (PVC)-vitamin C (VC)-TiO2 nano-composite film was prepared by embedding VC modified nano-TiO2 photocatalyst into the commercial PVC plastic. The solid-phase photocatalytic degradation behavior of PVC-VC-TiO2 nano-composite film under UV light irradiation was investigated and compared with those of the PVC-TiO2 film and the pure PVC film, with the aid of UV-Vis spectroscopy, scanning electron microscopy (SEM), weight loss monitoring, and X-ray diffraction spectra (XRD). The results show that PVC-VC-TiO2 nano-composite film has a high photocatalytic activity: the photocatalytic degradation rate of it is two times higher than that of PVC-TiO2 film and fifteen times higher than that of pure PVC film. The optimal mass ratio of VC to TiO2 is found to be 0.5. The mechanism of enhancing photocatalytic activity is attributed to the formation of a Ti-IV-VC charge-transfer complex with five-member chelate ring structure and a rapid photogenerated charge separation is thus achieved. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：152 / 156
页数：5
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