碳纳米管掺杂纳米WO_3气敏材料的制备及其应用  

Preparation and gas sensitivity of nano-tungsten oxide doped by carbon nanotubes

作　　者：桂阳海[1,2] 崔瑞立[1,2] 牛连杰[1] 张永辉[1] 李超[1] 

机构地区：[1]郑州轻工业学院河南省表界面科学重点实验室,郑州450002 [2]郑州轻工业学院功能材料研究所,郑州450002

出　　处：《化工新型材料》2011年第9期48-50,56,共4页New Chemical Materials

基　　金：河南省教育厅自然基金(2010A430021);郑州市科技攻关项目(083SGYG23143-1);郑州轻工业学院博士基金(2008BSJJ012)

摘　　要：为降低WO3气敏元件的工作电压,改善WO3基敏感材料的气敏性能,采用化学吸附沉淀-水热法合成WO3和WO3/SWCNT复合材料,并研究矿化剂用量和SWCNT掺杂量对其气敏性能的影响。结果表明,大剂量矿化剂的使用会降低WO3的气敏性能;碳纳米管掺杂可以使WO3在较低的工作温度下有较高的灵敏度。SWCNT掺杂量为1%的元件在2.68V时对体积分数为50×10-6的H2S的灵敏度高达916.90。To reduce the working voltage and enhance the sensitivity of the sensors based on WO3,WO3 and WO3/SWCNT nanocomposites were prepared through chemical adsorption precipitation-hydrothermal method.The effect of the additive amounts of mineralizer and the doping amounts of SWCNT to the gas sensing characteristics of the gas sensors based on the as-synthesized WO3 and WO3/SWCNT nanocomposites were studied.The results showed that much amount of mineralizer mook the sensitivity of WO3 was reduced,and the SWCNT doped WO3 sensors had high sensitivity at low working voltage.When w（SWCNT） was 1%,the sensitivities of the WO3/SWCNT composites to 50×10^-6 H2S was 916.90 at the working voltage of 2.68V.

关 键 词：三氧化钨 碳纳米管 水热合成 气敏 

分 类 号：TB381[一般工业技术—材料科学与工程]