Bi2O3/PMoA/SiO2复合膜的制备及其可见光光致变色性能研究  

The Preparation and Visible-light Photochromic Behaviors of Bi2O3/PMoA/SiO2 Hybrid Film

作　　者：郭苏岳 孔沁初 冯威[1] Guo Suyue;Kong Qinchu;Feng Wei(Key Laboratory of Groundwater Resource and Environment Ministry Education,Jilin University,Jilin,130021)

机构地区：[1]吉林大学地下水资源与水环境教育部重点实验室,吉林130021

出　　处：《当代化工研究》2020年第11期4-6,共3页Modern Chemical Research

基　　金：国家自然科学基金(No.61774073)。

摘　　要：将Bi2O3纳米粒子与Keggin结构的磷钼酸复合,利用SiO2溶胶-凝胶制备了Bi2O3/PMoA/SiO2复合膜。通过使用透射电子显微镜、红外光谱、紫外-可见吸收光谱和X射线光电子能谱,研究了该复合膜的结构、可见光光致变色性能及其可能的机制。研究成果显示,Bi2O3/PMoA粒子以较均匀的球形粒子形态很好的分散在复合膜中。Keggin结构PMoA的基本结构在复合过程中未被破坏,PMoA和Bi2O3粒子在界面间存在强的相互作用。经可见光照射后Bi2O3/PMoA/SiO2复合膜从无色变为深蓝色,Mo6+被部分还原为Mo5+,该变色过程按照光生电子转移的机制进行。The Bi2O3/PMoA/SiO2 hybrid film was prepared by SiO2 sol-gel combined with nano Bi2O3 and phosphommolybic acid of Keggin structure.The structure,photochromic behaviors and possible mechanism of the hybrid film were determined by TEM,IR,UV-vis and XPS.The results show that Bi2O3/PMoA particles are well dispersed in the hybrid film as relatively even spherical particles.The basic structure of Keggin PMoA was not destroyed during the combination process,and there was a strong interaction between PMoA and Bi2O3.The hybrid film changed from colorless to dark blue and Mo6+was partially reduced to Mo5+after being irradiated by visible light.The color-changed process was carried out according to the mechanism of photogenerated electron transfer.

关 键 词：杂多酸 BI2O3 复合膜 可见光 光致变色 光生电子 

分 类 号：TQ423.2[化学工程]