ZnIn_(2)O_(4)/Co_(3)O_(4)复合材料的制备及其传感器对异丙醇的气敏性能

Preparation of ZnIn_(2)O_(4)/Co_(3)O_(4) Composite and Gas Sensing Performance of Its Sensor to Isopropanol

利用溶剂热法在ZIF-67表面原位生长出In_(2)S_(3)和ZnIn_(2)S_(4)纳米片层结构,并通过高温退火形成相应的Co_(3)O_(4)、In_(2)O_(3)/Co_(3)O_(4)和ZnIn_(2)O_(4)/Co_(3)O_(4)敏感材料。制备出三种不同的气体传感器,并对异丙醇的气敏性能进行了研究。实验结果表明,与纯Co_(3)O_(4)传感器相比,In_(2)O_(3)/Co_(3)O_(4)和ZnIn_(2)O_(4)/Co_(3)O_(4)传感器表现出优异的气敏性能。尤其是ZnIn_(2)O_(4)/Co_(3)O_(4)传感器气敏性能最优,其对体积分数5×10^(-6)异丙醇的响应度为8.26,分别约为In_(2)O_(3)/Co_(3)O_(4)复合材料传感器的1.36倍和纯Co_(3)O_(4)传感器的4.67倍。同时,所制备的ZnIn_(2)O_(4)/Co_(3)O_(4)传感器也表现出良好的检测限、线性度、重复性和长期稳定性。

The In_(2)S_(3) and ZnIn_(2)S_(4) nanosheets hierarchical structure were in-situ grown on the surface of ZIF-67 by the solvothermal method,and the corresponding sensing materials of Co_(3)O_(4),In_(2)O_(3)/Co_(3)O_(4) and ZnIn_(2)O_(4)/Co_(3)O_(4) were obtained by high temperature annealing.And then,three different kinds of gas sensors were prepared and the gas sensing performances of isopropanol were researched.The experimental results demonstrate that compared with pure Co_(3)O_(4) sensor,In_(2)O_(3)/Co_(3)O_(4) and ZnIn_(2)O_(4)/Co_(3)O_(4) sensors exhibit excellent gas sensing performance.Especially,the gas sensing performance of ZnIn_(2)O_(4)/Co_(3)O_(4) sensor is the best,and the response of ZnIn_(2)O_(4)/Co_(3)O_(4) sensor to isopropanol with a volume fraction of 5×10^(-6) is 8.26,which is about 1.36 and 4.67 times those of In_(2)O_(3)/Co_(3)O_(4) composite sensor and pure Co_(3)O_(4) sensor,respectively.Meanwhile,the prepared ZnIn_(2)O_(4)/Co_(3)O_(4) sensor shows good limit of detection,linearity,repeatability and long-term stability.