pH-dependent structure and photochromic properties of phosphomolybdic acid/polyacrylamide composite films

被引：7
|
作者：
Chen, Jie [1 ]
Dong, Li-li [2 ]
Feng, Wei [3 ]
Liu, Su-Ling [1 ]
Liu, Jing [3 ]
Yang, Feng-Lin [1 ]
机构：
[1] Dalian Univ Technol, Sch Environm Sci & Technol, Key Lab Ind Ecol & Environm Engn MOE, Dalian 116024, Peoples R China
[2] Jilin Architectural & Civil Engn Inst, Minist Educ, Key Lab Songliao Aquat Environm, Changchun 130118, Peoples R China
[3] Jilin Univ, Key Lab Groundwater Resources & Environm, Minist Educ, Changchun 130021, Peoples R China
来源：
JOURNAL OF MOLECULAR STRUCTURE | 2013年 / 1049卷
基金：
中国国家自然科学基金; 高等学校博士学科点专项科研基金;
关键词：
Phosphomolybdic acid; Polyacrylamide; Composite films; Photochromism; pH-dependent; KEGGIN;
D O I：
10.1016/j.molstruc.2013.06.067
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A series of nanocomposite films with different pH were constructed by entrapped phosphomolybdic acid (PMoA) into polyacrylamide (PAM) networks. The structure, photochromic properties and mechanism of composite films were studied with transmission electron microscope (TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), ultraviolet-visible spectra (UV-vis) and X-ray photoelectron spectroscopy (XPS). The results indicated that pH had a significant effect on the microstructure and photochromic properties of composite films. The TEM image showed that PMoA particles changed from well dispersed sphere-shape to irregular similar ball-shape with the increase of pH. XRD pattern showed that PMoA changed from crystal phase to amorphous phase with pH increased. The FT-IR results revealed that the octahedral structure of PMoA was destroyed with the increase of pH. PMoA/PAM films with pH 2 had higher photochromic efficiency than those films with other pH value. According to XPS, the different photochromic properties were caused by the microstructure change of the heteropoly compound with different pH value. (c) 2013 Elsevier B.V. All rights reserved.
引用
收藏
页码：414 / 418
页数：5
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