摘要
将掺杂偶氮苯(Azo)的聚乙烯吡咯烷酮(PVP)作为敏感试剂,利用旋转甩涂法将其固定在钾离子(K^+)交换玻璃光波导表面,研制了Azo-PVP复合薄膜/K^+交换玻璃光波导气敏元件,并对其气敏特性进行研究。实验结果表明,该敏感元件对苯乙烯蒸汽有较好的选择性响应,其最低检测浓度为1.0×10^(-8)体积比(V/V_0),响应-恢复时间分别为9 s和24 s。在浓度1.0×10^(-8)~1.0×10^(-3)(V/V_0)范围内,气体浓度与输出光强度之间有较好的线性关系。
The azo benzene（Azo） doped polyvinylpyrrolidone（PVP） composite film was immobilized on the surface of potassium ion（K＋） exchanged glass optical waveguide（OWG） by spin coating method.An Azo-PVP compound thin film/K＋ exchange glass optical waveguide gas sensor was developed and its gas sensibility was investigated.The experimental results showed that the present gas sensor has a good sensibility to low concentration of styrene vapor at room temperature,and its response time and recovery time for 1.0×10-8 volume fraction of styrene gas were 9 s and 24 s,respectively.A good linear relationship was obtained between the output light intensity and volume concentration in the range of 1.0×10-8-1.0×10-3.The Azo-PVP composite film optical waveguide gas sensor has a short response time,high sensitivity,simple structure and easy farication.
出处
《分析测试学报》
CAS
CSCD
北大核心
2013年第11期1339-1343,共5页
Journal of Instrumental Analysis
基金
新疆维吾尔自治区自然科学基金项目(2011211A022)
国家自然科学基金项目(21265020)
