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

作　　者：黄青武[1] 吴金金[1] 曾大文[2] 宋武林[1] HUANG Qingwu;WU Jinjin;ZENG Dawen;SONG Wulin(The Analytical and Testing Center,Huazhong University of Science and Technology,Wuhan 430074,China;School of Material Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]华中科技大学分析测试中心,武汉430074 [2]华中科技大学材料科学与工程学院,武汉430074

出　　处：《华南师范大学学报（自然科学版）》2022年第4期18-24,共7页Journal of South China Normal University(Natural Science Edition)

基　　金：湖北省自然科学基金项目(2020CFB664);华中科技大学实验技术研究项目(201946,201755,201444)。

摘　　要：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.

关 键 词：WO_(3) 室温气敏性能 光电子能谱 甲苯 氧空位 光激发 

分 类 号：O614.61[理学—无机化学]