高等学校化学学报2025，Vol.46Issue(12)：8-15,8.DOI:10.7503/cjcu20250267
CuCl2修饰WO3对超低浓度H2S的高灵敏度检测
Highly Sensitive Detection on Trace H2S Gas over CuCl2-modified WO3
摘要
Abstract
The honeycomb-like porous WO3 assembled by nanowires was synthesized by solvothermal method.After mixing and grinding with 1%(molar ratio to WO3)of CuO or CuCl2,the CuO-WO3 and Cu2+-WO3 composites were obtained.The morphology,composition,valence state and energy band structure etc.of the WO3,CuO-WO3 and Cu2+-WO3 samples were characterized systematically and their gas sensing performances to H2S were studied.The results showed that the response value of the pure WO3 was rather low,only 2.8,while the sensitivities of the two composite sensors were significantly increased.Among the three sensors,the Cu2+-WO3 sensor had the highest response value to H2S,67.6,which is 24.1 times that of the pure WO3 sensor.Moreover,the Cu2+-WO3 sensor can effectively detect extremely low concentration of H2S gas,20 μg/kg,indicating its superior sensitivity for H2S detection.This might be due to copper ion doping enhancing the charge transfer efficiency/separation,narrowed band gap and the redox reactions between the Cu2+and H2S,leading to significantly improved H2S sensing performance.关键词
WO3复合物/铜离子掺杂/H2S/气体传感/传感机理Key words
WO3 composite/Cu2+ion doping/H2S/Gas sensing/Sensing mechanism分类
化学化工引用本文复制引用
王斌,胡梦洁,李佩林,王文静,杨赢,朱连杰..CuCl2修饰WO3对超低浓度H2S的高灵敏度检测[J].高等学校化学学报,2025,46(12):8-15,8.基金项目
国家自然科学基金(批准号:22275140)资助. Supported by the National Natural Science Foundation of China(No.22275140). （批准号:22275140）
