摘要
采用简单水热法合成了一系列C3N4/CuGaO2复合材料.采用XRD、SEM、TEM和XPS对制备的样品进行了表征.研究了一系列C3N4/CuGaO2复合材料的气敏性能.结果表明,基于C3N4/CuGaO2-0.3复合材料(C3N4与CuGaO2的摩尔比为0.3:1)的气体传感器对甲苯的传感性能优于CuGaO2传感器.相比较于CuGaO2传感器的工作温度(140 ℃),C3N4/CuGaO2-0.3复合材料传感器的最佳工作温度仅为25 ℃,对100 μL/L甲苯气体的响应达到28,检出限低至0.01 μL/L.对100 μL/L甲苯气体的响应时间和恢复时间分别为114.2和27.4 s.此外,用于检测甲苯的C3N4/CuGaO2-0.3复合材料传感器还具有优异的长期稳定性、良好的重复性和优异的抗湿性能.
Abstract
A series of C3N4/CuGaO2 composites were synthesized by facile hydrothermal method.The prepared samples were characterized by XRD,SEM,TEM,and XPS.The gas sensing properties of the C3N4/CuGaO2 composites were investigated.Results demonstrate that the gas sensor based on C3N4/CuGaO2-0.3 composite(molar ratio of C3N4 to CuGaO2 is 0.3:1)shows better sensing performance to toluene than CuGaO2 sensor does.Compared with the operating temperature of CuGaO2 sensor(140 ℃),the optimal working temperature of C3N4/CuGaO2-0.3 composite sensor is only 25 ℃,the response to 100 μL/L toluene gas reaches 28,and the detection limit is as low as 0.01 μL/L.The response time and recovery time for the detection of 100 μL/L toluene vapor are 114.2 and 27.4 s,respectively.Moreover,the C3N4/CuGaO2-0.3 composite sensor also exhibits excellent long-term stability,good repeatability,and extraordinary humidity resistance for toluene detection.
基金项目
National Natural Science Foundation of China(61971003)
National Natural Science Foundation of Shandong Province(ZR2020MF025)
NETL
NSTL
万方数据