Improved sensing performance of WO3 nanoparticles decorated with Ag and Pt nanoparticles

• 作者: Dong-Liang Feng Zheng-You Zhu Ling-Ling Du Xia-Xia Xing Chen Wang Jian Chen Yong-Tao Tian Da-Chi Yang
• 来源期刊: 稀有金属（英文版）
• 年，卷（期）: 2021,（6）
• 所属期刊栏目: ADVANCED NANOMATERIALS FOR GAS AND HUMIDITY SENSORS
• 页码范围: 1642-1650
• 页数: 9页
• 语种: 英文

摘要

Gas sensors built with metal oxide semicon-ductors have attracted tremendous attention due to the growing demand for the detection of inflammable,explo-sive and toxic gases.Herein,to improve the sensing response,WO3 nanoparticles decorated with Ag and Pt bimetals (Ag and Pt/WO3 NPs) have been developed via combined hydrolysis and hydrothermal strategies.Such sensors prototypes show high response to acetone (Ra/Rg =250@100 × 10-6,140 ℃),which is 6.1 fold as high as that of the pristine WO3 NPs (Ra/Rg=41@100 × 10-6,140 ℃).Moreover,the recovery time of Ag and Pt/WO3 NPs was reduced from 138 to 13 s compared with that of the pristine WO3 NPs.The improved acetone sensing performance may be attributed to that the chemical and electronic sensitization of Ag and Pt to WO3 NPs increases adsorbed oxygen species,speeds up the reaction and thus boosts the sensing response.Our strategy that decoration of dual precious metals onto WO3 NPs improves the acetone sensing performance may be applied to the gas sensors of other sensing materials.