论文部分内容阅读
采用压电石英微天平、红外吸收光谱技术对 β -环糊精在TiO2 纳米粒多孔膜上固载过程进行了研究。基于TiO2 纳米粒多孔膜 ,实现了 β -环糊精在压电石英晶体表面的高容量固载 (约 4 μg·cm- 2 )。β -环糊精 /TiO2 纳米粒膜修饰的压电传感器检测苯环化合物蒸气具有响应时间快、可重复使用、灵敏度高的特性 ;2 5℃下 ,对于氯苯、硝基苯、O -二甲苯 ,m -二甲苯 ,p -二甲苯的检测下限分别为 12 0ng·ml- 1、10 0ng·ml- 1、4 0ng·ml- 1、4 0ng·ml- 1、4 0ng·ml- 1,响应时间约为 1min .含量为其 10倍的丙酮、乙醚、乙醇蒸气存在对上述有机物气体的测定不产生干扰
The immobilization of β - cyclodextrin on the porous TiO2 nanoparticle was studied by using piezoelectric quartz microbalance and infrared absorption spectroscopy. Based on the porous TiO2 nanoparticle, the high capacity immobilization of β - cyclodextrin on the piezoelectric quartz crystal surface was achieved (about 4 μg · cm ~ 2). β - Cyclodextrin / TiO2 Nanoparticle Membrane Modified Piezoelectric Sensor for Detection of Benzene Compounds Vapor has the characteristics of fast response time, reusable and high sensitivity. For chlorobenzene, nitrobenzene, O - bis The detection limits of toluene, m-xylene and p-xylene were respectively 120 ng · ml -1, 110 ng · ml -1, 140 ng · ml -1, 140 ng · ml -1, 60 ng · ml -1 , The response time is about 1min. The content of 10 times its acetone, ethyl ether, ethanol vapor exists on the determination of the above organic gas does not produce interference