不同形貌聚苯胺/氧化锌复合材料的制备与光催化性能  

Synthesis and Photodegradation Characteristics of PANI /ZnO with Different Morphology

作　　者：徐惠[1] 邢建伟[1] 陈泳[1] 

机构地区：[1]兰州理工大学石油化工学院,甘肃兰州730050

出　　处：《高分子材料科学与工程》2013年第9期164-168,174,共6页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(51062011);甘肃省教育厅项目

摘　　要：通过水热法制备了球形、棒状和花形的纳米氧化锌;并利用原位聚合法制备了对应形貌的氧化锌/聚苯胺复合材料。用X射线衍射(XRD)、热重分析(TG-DTG)和扫描电镜(SEM)等测试手段,对氧化锌及复合物进行了结构表征。以次甲基蓝为模拟污染物,在紫外灯下考察了复合物材料的光催化性能和动力学特征。结果表明,聚苯胺(PANI)/氧化锌(ZnO)复合材料的光催化性能远高于纯纳米ZnO,而不同形貌的PANI/ZnO其光催化降解效率也不同,依次为球形>棒状>花形;PANI/ZnO(球形)的失水温度和分解温度与纯PANI相比分别提高了123.3℃和47.6℃。光催化动力学研究表明,以球形和棒状氧化锌为原料制备的PANI/ZnO复合材料符合一级动力学,PANI/ZnO(花形)复合物符合二级动力学。The spherical, rodlike and floriated nano ZnO and polyaniline （PANI）/ZnO composites were prepared respectively by hydrothermal method and in situ polymerization with zinc acetate, sodium hydroxide and ammonium etc. The structure of the composite was characterized by XRD, TG-DTA and SEM. The photodegradation and dynamic characteristics were also investigated in the methylene blue （MB） degradation under the UV lamp. The results show that PANI/ZnO composites show higher degradation efficiency than pure ZnO. The catalyst with the different morphology presents the different efficiency. The dehydration and decomposition temperature of spherical ZnO/PANI composites increases by 123.3℃ and 47.6℃ respectively than those of pure PANI. The dynamics research shows that the spherical and rodlike ZnO/PANI composites accord with pseudo-first-order dynamics, while the floriated ZnO/PANI composite conforms to the secondary dynamics.

关 键 词：聚苯胺 氧化锌 光降解 次甲基蓝 形貌 动力学 

分 类 号：TB333[一般工业技术—材料科学与工程]