水热法合成WO3纳米片及其甲苯气敏性能研究  

Hydrothermal Synthesis and Toluene Gas Sensing Performance of WO3 Nanosheets

作　　者：高利苹 许文娴 吴乐于 孙开莲[1] 侯欢欢 陈玉萍[1] GAO Liping;XU Wenxian;WU Leyu;SUN kailian;HOU Huanhuan;CHEN Yuping(School of Material and Chemical Engineering,Chuzhou University,Chuzhou 239000,Anhui,China;Chuzhou Yinxing New Material Co.,Ltd.,Chuzhou 239000,Anhui,China;School of Chemistry and Chemical Engineering,Anhui University of Technology,Maanshan 243000,Anhui,China)

机构地区：[1]滁州学院材料与化学工程学院,安徽滁州239000 [2]滁州银兴新材料有限公司,安徽滁州239000 [3]安徽工业大学化学与化工学院,安徽马鞍山243000

出　　处：《陶瓷学报》2020年第5期686-693,共8页Journal of Ceramics

基　　金：安徽省高校省级自然科学研究重点项目(KJ2019A0636);安徽省大学生创新创业训练项目(2020CXXL107)。

摘　　要：甲苯是一种剧毒物质,为了能够对甲苯气体高灵敏度检测,采用水热法合成了单斜相WO3纳米片敏感材料。探讨了不同水热温度、煅烧温度及柠檬酸量对WO3纳米材料晶型、形貌及对甲苯气体的敏感性能影响。结果表明:随着水热温度的提高,WO3纳米材料的晶型发生转变,出现了亚稳相(六方相);随着煅烧温度的增加,材料的结晶性变好,片状结构破坏,且发生团聚现象;柠檬酸的加入有利于WO3纳米材料由颗粒状向片状结构转变。气敏性能研究表明,当加热温度为280℃时,单斜相WO3纳米片传感器对50 ppm甲苯的灵敏度达到9,为同浓度苯和甲醛气体的2倍以上,具有相对较好的选择性。Toluene is a highly toxic organic substance.In order to detect toluene gas with high sensitivity,monoclinic WO3 nanosheets were synthesized by using a hydrothermal method.The effect of hydrothermal reaction temperature,calcination temperature and the content of citric acid on crystal structure,morphology and toluene gas sensing performance of the WO3 nanosheets were studied and discussed.It is found that with the hydrothermal reaction temperature exhibited a strong influence on phase composition of the WO3 nanomaterials,with the presence of a metastable phase(hexagonal phase).With increasing calcination temperature,the crystallinity is gradually increased,but the lamellar structure is destroyed and the particles are agglomerated.The addition of citric acid has a positive effect on the formation of the lamellar structure.The WO3 nanosheets-based sensor displayed a sensitivity of 9 to 50 ppm toluene at the test temperature of 280℃,which is higher than the those to benzene and formaldehyde at the same concentration by two times,demonstrating promising selectivity to toluene.

关 键 词：WO3纳米片 水热法 甲苯 气敏性能 

分 类 号：TQ174.75[化学工程—陶瓷工业]