基于纳米CuZSM-5分子筛的传感器用于沙林检测的研究

Sensors Based on Nano-zeolite CuZSM-5 for Sarin Detection

将纳米ZSM-5或CuZSM-5分子筛作为敏感膜，结合石英晶体微天平（QCM）制备了对神经毒剂沙林（GB）敏感的传感器，研究了硅铝摩尔比和铜离子修饰对毒剂检测性能的影响。结果表明，硅铝摩尔比为25的纳米CuZSM-5分子筛对GB响应最好，并可对GB进行连续多次检测，其灵敏度为19．1Hz／（mg·m^-3），检出限达1．1mg·m^-3（S／N=3）；线性范围为1．5～20．0mg·m^-3，线性相关系数为0．9958，在毒剂检测中具有较强的应用前景。

A new quartz crystal microbalance （QCM）sensor based on nanoZSM-5 or nanoCuZSM-5 sensitive films for sarin detection was developed. The influences of nanoZSM-5 with different silicon - to -aluminum molar ratios （Si/A1）and copper ion modification on the sarin detection were studied. The results showed that the sensor modified with nanoCuZSM-5 with Si/Al molar ratio of 25 gave the highest response with a sensitivity of 19. 1 Hz/（mg·m^-3） and could be used repeatedly. The linear response range of sarin was 1.5 - 20. 0 mg·m^-3 （ r = 0. 995 8） with a detection limit of 1.1 mg·m^-3（S/N = 3）. The sensor may be a promising one in detecting toxic gas.