微波辅助合成纳米WO3/TiO2复合材料及其气敏性能

摘要

To enhance the gas sensing property of WO3-based sensing material, WO3/TiO2 nanocomposites were one-step synthesized through a microwave returning method. Gas sensors were fabricatel from the synthesized WO3/TiO2 nanocomposites, and the effects of TiO2-doped amount on the gas sensing properties of obtained gas sensor were studied.The results show that the gas sensors have higher response to H2S, NOx, acetone and xylene of 100× 10-6 (volume fraction).When doped w(TiO2) is 20％, the sensitivities of the gas sensors to H2S and NOx are 31.18 and 695.84, respectively. If doped w(TiO2) is 30％, the sensitivities of the gas sensors to xylene and acetone are 39.19 and 35.69, respectively.%为改善WO3基敏感材料的气敏性能,采用微波回流法一次性合成了纳米WO3/TiO2复合材料,并研究TiO2掺杂量对用其制备的气敏元件气敏性能的影响.结果表明:此气敏元件对体积分数为100×10-6的NOx、二甲苯、H2S和丙酮气体具有较强的敏感性,掺杂w(TiO2)为20%的元件,对H2S和NOx的灵敏度分别为31.18和695.84;掺杂w(TiO2)为30%的元件,对二甲苯和丙酮的灵敏度分别为39.19和35.69.