硅酸盐学报2017，Vol.45Issue(10)：1467-1473,7.DOI:10.14062/j.issn.0454-5648.2017.10.12
PdO表面催化改性WO3纳米颗粒对丙酮的气敏性能
Acetone Sensing Properties of WO3 Nanoparticles with PdO Catalytic Surface Modification
摘要
Abstract
Tungsten trioxide (WO3) nanoparticles were prepared by an acidification method, and a gas sensor was fabricated based on the prepared WO3 nanoparticles by a screen printing technique. The gas sensing properties of acetone were investigated at a low concentration under dry condition. The results show that the fabricated WO3 nanoparticles are a planar-like structure with a specific surface area of 10m2/g. However, the sensing response is relatively low to acetone. In order to promote its response to acetone for the neat WO3, palladium oxide was loaded on the surface of WO3 nanoparticlesvia a conventional impregnation method. It is indicated that the response to acetone of WO3 could be increased by approximately 5 times at a loading of PdO, even just to 1.5×10-6 acetone with a response of 3.65. Thus, a small amount of PdO load (1.0％ in mass fraction) could improve the gas sensitivity of WO3 to acetone. The mechanism of gas-sensing reaction of acetone indicates that the sensing properties of PdO-WO3 to acetone could be affected by the surface adsorbed oxygen and the lattice oxygen of PdO surface catalytic modification.关键词
三氧化钨/催化改性/氧化钯/丙酮/气敏性能Key words
tungsten trioxide/catalytic modification/palladium monoxide/acetone/sensing property分类
计算机与自动化引用本文复制引用
李彦,花中秋,武一,曾艳,奉轲,王天赐,邱志磊..PdO表面催化改性WO3纳米颗粒对丙酮的气敏性能[J].硅酸盐学报,2017,45(10):1467-1473,7.基金项目
国家自然科学基金青年项目(61501167) （61501167）
天津市自然科学基金面上项目(15JCYBJC52100) （15JCYBJC52100）
河北省自然科学基金青年项目(F2016202214). （F2016202214）
