三维有序大孔WO_3的制备及其对丙酮的气敏响应  

Synthesis of Three-dimensionally Ordered Macroporous WO_3 and Its Response of Acetone Gas Sensing Performance

作　　者：刘志强[1] 要红昌[2] 申小清[1] 陈金周[1] 

机构地区：[1]郑州大学材料科学与工程学院,郑州450001 [2]郑州大学化学与分子工程学院,郑州450001

出　　处：《人工晶体学报》2016年第11期2626-2633,共8页Journal of Synthetic Crystals

基　　金：国家自然科学基金(21471133);河南省教育厅基金(14A150001);郑州市科技局项目(141PQYJS562)

摘　　要：三维有序大孔(3DOM)材料具有高度有序的孔结构和较大的比表面积,这些特点有利于气体在材料表面的传输与扩散,可以作为良好的气敏材料。本文通过聚苯乙烯模板结合煅烧处理的方法制备了3DOM WO_3气敏材料,并运用XRD、SEM、BET、XPS等手段对其物相、形貌、比表面积和表面成分等进行了表征。气敏测试结果表明,所制备的3DOM材料对丙酮灵敏度高(在丙酮浓度10 ppm时,S=10),检测限可低至0.2 ppm。此外,3DOM WO_3材料对丙酮还具有良好的选择性和长期稳定性。最后,对所制备的3DOM WO_3材料进行了气敏机理解释。Three-dimensionally ordered macroporous（3DOM） materials have great application potential in gas sensing area because their characteristics,including well-ordered porous architecture and high surface area,facilitate the access,diffusion and reaction of gas molecules on the surface of the materials.Herein,3DOM WO3 was synthesized by a simple polystyrene template method followed by heat treatment.The structure, morphology, specific surface area and composition of the as-prepared product were characterized by XRD,SEM,BET and XPS.The performance of the 3DOM WO3 sensor to acetone was investigated.The response of the 3DOM WO3 sensor to 10 ppm actone could reach up to 10 and the practical detection limit attained as low as 0.2 ppm.Besides,the WO3 sensor exhibited good selectivity to acetone and excellent long-term stability.The mechanism of the 3DOM WO3 gas sensing is also proposed.

关 键 词：WO3 三维有序大孔 气敏 

分 类 号：TB383[一般工业技术—材料科学与工程]