WO_3纳米棒/石墨烯复合材料的制备及其气敏性能研究  

Synthesis and gas-sensing properties of WO_3 nanorods/graphene composites

作　　者：桂阳海[1] 孔华杰 刘贝贝[1] 付柯瑞 王槐顺 袁朝圣[2] 

机构地区：[1]郑州轻工业学院材料与化学工程学院,河南郑州450001 [2]郑州轻工业学院物理与电子工程学院,河南郑州450002

出　　处：《郑州轻工业学院学报（自然科学版）》2015年第5期7-11,共5页Journal of Zhengzhou University of Light Industry:Natural Science

基　　金：国家自然科学基金项目(21371158);中国博士后基金项目(2015M580638);河南省创新人才项目(16HASTIT025);河南省骨干教师项目(2011GGJS-102);河南省科技厅基金项目(122300410299);郑州轻工业学院大学生科技创新项目

摘　　要：以钨酸钠和盐酸为原料、草酸和硫酸钠为辅助剂,采用水热法制备纯WO3,进一步掺杂氧化石墨烯(GO)制备WO3纳米棒/石墨烯复合材料.通过XRD,FE-SEM,RAMAN,FTIR等手段对不同GO掺杂量的WO3纳米棒/石墨烯复合材料进行表征,并采用静态配气法对该材料进行气敏性能测试.结果表明,纯WO3为单斜晶相,WO3纳米棒/石墨烯复合材料为四方晶相,且随着GO掺杂量的增加,纳米棒的长径比逐渐增大;当GO掺杂量为1.0 wt%时,复合材料的气敏性能较好,加热电压为2.96 V(约155℃),对5×10-6H2的灵敏度达1.779,响应和恢复时间分别为3 s和4 s.Using sodium tungstate and hydrochloric acid as raw materials,oxalic acid and sodium sulfate as auxiliary agents,WO3 nanorods / graphene composites had been synthesized by hydrothermal method. The as-synthesized samples were characterized by XRD,FE-SEM,RAMAN and FTIR. Gas-sensing characteristics of the materials had been tested by static state method. The results illustrated that the as-synthesized pure WO3 had monoclinic phase and the WO3/ graphenenanomaterial had tetragonal phase. The length-diameter ratio of the materials increased when the amounts of graphene oxide（ GO） increased,and the1. 0 wt% WO3/ graphenenanocomposite had a good gas-sensing property. Its sensitivity could reach 1. 779 of 5 × 10- 6H2 at 2. 96 V working voltage（ about 155 ℃）. And this time,the response and recovery time was 3 s and 4 s,respectively.

关 键 词：WO3纳米棒/石墨烯复合材料 水热法 气敏性能 

分 类 号：TB383[一般工业技术—材料科学与工程]