纳米WO_3/聚苯胺复合材料的制备及气敏性能  

Preparation and gas-sensing properties of WO_3/polyaniline nanocomposites

作　　者：桂阳海[1] 王伟民[1] 刘贝贝[1] 苗赵阳 田俊峰[1] 赵建波[1] 

机构地区：[1]郑州轻工业学院材料与化学工程学院,河南郑州450002

出　　处：《电子元件与材料》2015年第9期35-39,共5页Electronic Components And Materials

基　　金：国家自然科学基金资助(No.21371158);河南省高等学校青年骨干教师资助计划;河南省科技厅基金资助(No.122300410299);大学生科技创新项目

摘　　要：用过硫酸铵作为氧化剂,通过界面聚合法制备纳米聚苯胺,并进一步通过水热法制备了纳米WO3/聚苯胺复合材料。通过XRD、FTIR、TG-DTA、SEM等手段对不同聚苯胺掺杂(质量分数为1%,5%,10%)的WO3/聚苯胺复合材料进行了表征,并进行了气敏性能研究。结果显示,合成的球状纳米WO3包覆棒状聚苯胺核-壳结构复合材料主晶相为正交晶系,晶粒大小约为20 nm;掺杂质量分数10%的聚苯胺后,主晶相变为六方晶系,晶粒大小为15 nm左右。复合材料的分解温度提高到262℃左右。气敏性能研究表明,复合材料在室温对三甲胺显示出较好的气敏性能,对体积分数200×10–6的三甲胺的灵敏度达到4.8。Using ammonium persulfate as the oxidizer, uniform polyaniline （PANI） nanofibers were prepared by interracial polymerization method. The WO3/PANI nanocomposites with different doping mass fraction （1%, 5%, 10%） of PANI were then synthesized via hydrothermal method. The as-synthesized nanocomposites were characterized by means of XRD, FTIR, TG-DTA, SEM and other techniques as well as the gas sensing properties were investigated. The main phase of the core-shell structural nanocomposite with the globular WO3 coated on the surface of PANI nanofibers is orthogonal WO3 ·0.33H20 with an average grain size of about 20 nrn, while it is transformed to hexagonal WO3 · 0.33H20 with an average grain size of about 15 nm when doped with 10% mass fraction of PANI. The WO3/10% PANI nanocomposite is qualified with the decomposition temperature above 262 ℃ and better gas-sensing performance to trimethylamine with the sensitivity of 4.8 to 200× 10-6 （volume fraction） h-imethylamine at room temperature.

关 键 词：纳米WO3 聚苯胺 水热 气敏 室温 三甲胺 

分 类 号：TB383[一般工业技术—材料科学与工程]