WO_(3)/石墨烯的湿化学法制备及其室温光激发甲苯气敏性能

The Preparation of WO3/Graphene Nanocomposites with the Wet Chemical Method and Their Photo-activated Toluene-sensing Property at Room Temperature

采用简单的低温化学合成法成功制备出WO_(3)/石墨烯纳米复合材料,该材料在室温下表现出极佳的光激发甲苯气敏性能。结果表明:石墨烯的加入会使WO_(3)片层尺寸减小到300 nm左右,同时会组装成球状结构。在复合材料中石墨烯与WO_(3)会以化学键结合,有效降低WO_(3)中氧空位的浓度。在蓝光激发下,WO_(3)/石墨烯复合材料对100 mL/m^(3)甲苯的气敏响应性能比WO_(3)材料提高了3.3倍。该甲苯传感材料在易爆、易燃和有毒环境中有很好的应用前景。

WO_(3)/graphene nanocomposites were successfully prepared with the simple low-temperature chemical synthesis method and they showed excellent photo-activated toluene gas-sensing properties at room temperature. The results showed that the addition of graphene would reduce the size of WO_(3)lamella to about 300 nm and assemble it into a spherical structure. Graphene and WO_(3)would form a chemical bond in the composite, effectively reducing the concentration of oxygen vacancies in WO_(3). The photo-activated gas-sensing response of WO_(3)/graphene composite to 100 mL/m^(3) toluene under blue light was 3.3 times higher than that of pure WO_(3). The material may have a good prospect for application in the explosive, flammable and toxic environment.