Enhanced Photochromism of Heteropolyacid/Polyvinylpyrolidone Composite Film by TiO2 Doping

被引：13
作者：
Lu, Cong [1 ]
Sun, Yan [1 ]
Liu, Jialu [1 ]
Wang, Xiansheng [1 ]
Liu, Su-Ling [2 ]
Feng, Wei [1 ]
机构：
[1] Jilin Univ, Minist Educ, Key Lab Groundwater Resources & Environm, Changchun 130021, Peoples R China
[2] Dalian Univ Technol, Sch Environm Sci & Technol, MOE, Key Lab Ind Ecol & Environm Engn, Dalian 116024, Peoples R China
来源：
JOURNAL OF APPLIED POLYMER SCIENCE | 2015年 / 132卷 / 10期
基金：
美国国家科学基金会; 高等学校博士学科点专项科研基金;
关键词：
photochromic performance; polyoxometalates; polyvinylpyrrolidone; TiO2; doping; ORGANIC-INORGANIC NANOCOMPOSITES; THIN-FILM; VISIBLE-LIGHT; BEHAVIOR; POLYOXOMETALATE; MICROSTRUCTURE; POLYACRYLAMIDE;
D O I：
10.1002/app.41583
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Novel composite film was synthesized by TiO2 doping into phosphomolybdic acid (PMoA)/polyvinylpyrrolidone (PVP) system. The influence of TiO2 doping on its microstructure and photochromic properties was investigated via atomic force microscopy, transmission electron microscope, Fourier transform infrared spectroscopy (FT-IR), ultraviolet-visible spectra, and X-ray photoelectron spectroscopy (XPS). After TiO2 doping, the surface of TiO2/PMoA/PVP composite film changed to rough from smooth, and the particle size significantly increased. The FT-IR results verified that the basic structure of PMoA and PVP were not destroyed in the composite films. The non-bonded interaction between the acid and polymer was strengthened by TiO2 doping. Irradiated with UV light, composite films changed from colorless to blue. The TiO2/PMoA/PVP composite film exhibited a strong photochromic effect and faster bleaching reaction than that of PMoA/PVP film. XPS results indicated that the amount of PMoA in photo-reductive reaction was increased after TiO2 doping, which resulted in the photochromic efficiencies enhanced. (C) 2014 Wiley Periodicals, Inc.
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页数：6
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