WS_(2)/CuGa_(2)O_(4)复合材料的制备及其气敏性

Preparation and gas‑sensing properties of WS_(2)/CuGa_(2)O_(4) composite materials

采用共沉淀法制备了CuGa_(2)O_(4)纳米材料,并利用水热法制备了一系列WS_(2)/CuGa_(2)O_(4)复合材料。结合X射线衍射(XRD)、扫描电子显微镜(SEM)、X射线光电子能谱(XPS)等对制备的材料进行了物相组成、表面形貌以及元素价态的分析。研究了WS_(2)的复合量对CuGa_(2)O_(4)材料检测乙醇气体敏感性能的影响。实验结果表明,当WS_(2)与CuGa_(2)O_(4)质量比为1%时,该复合材料制备的传感器在室温下对100μL·L^(-1)乙醇气体表现出345.3的灵敏度,响应时间和恢复时间分别为184和69 s,且最低检测限为0.1μL·L^(-1)。

CuGa_(2)O_(4) nanomaterials were synthesized by the co-precipitation method,and a series of WS_(2)/CuGa_(2)O_(4) composite materials were prepared by the hydrothermal method.The crystal phase,morphology,and chemical state of the as-prepared materials were investigated by X-ray diffraction(XRD),scanning electron microscopy(SEM),X-ray photoelectron spectroscopy(XPS),and so on.The effect of the doped amount of WS_(2) on the gas-sensing sensitivity of CuGa_(2)O_(4) materials to ethanol gas was studied.The results showed that when the mass ratio of WS_(2) to CuGa_(2)O_(4) was 1%,the response of this gas sensor to 100μL·L^(-1) ethanol gas at room temperature was 345.3,and the response and recovery times were 184 and 69 s,the detection limit reached 0.1μL·L^(-1).