文献类型：期刊文献

英文题名：Anchoring Pd nanoparticles on metal-organic frameworks for SO2 detection

作者：Lu, Yuanjia[1];Du, Qian[1];Yang, Li[1];Guo, Shenghui[1];Gao, Jiyun[1];Hou, Ming[1];Zhang, Shunping[2];Zhang, Guozhu[3]

机构：[1]Kunming Univ Sci & Technol, Dept Met & Energy Engn, Kunming 650093, Peoples R China;[2]Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, Wuhan 530074, Peoples R China;[3]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai Key Lab Intelligent Sensing & Detect Tech, Shanghai 200237, Peoples R China

年份：2023

卷号：636

外文期刊名：APPLIED SURFACE SCIENCE

收录：;EI(收录号：20232614320979);WOS:【SCI-EXPANDED(收录号:WOS:001026513200001)】；

基金：This research was supported by National Natural Science Foundation of China (NSAF Grant No. U2030207) ; Yunnan Province Science and Technology Major Project for Materials Genetic Engineering of Rare and Precious Metal (202002AB080001) ; Science Research Foundation of Yunnan Provincial Education Department (2022J0441) ; Sichuan Science and Technology Program (22QYCX0097) .

语种：英文

外文关键词：Porous ZIF-8 material; Pd nanoparticles; Gas sensing; Electron sensitization; Chemical sensitization

摘要：Enhancing the electron transport capability of metal-organic framework (MOF) materials, which are novel gas sensing materials, remains a formidable challenge. In this study, palladium metal nanoparticles (Pd-NPs) were successfully anchored on the surface of ZIF-8, a porous material, by using chemical reduction to improve the gas sensing performance of ZIF-8 significantly. The active catalytic sites of Pd-NPs are stimulated by the porous structure of ZIF-8 and are uniformly dispersed on the surface of the porous ZIF-8 material. The Pd-NPs/ZIF-8 composite material has good response and selectivity for up to 200 ppm SO2 at 300 degrees C (gas sensing response of 86.61%), a fast response time (approximately 24 s), low detection limit (4.0 ppb) and excellent stability and anti-interference ability. These outcomes can be attributed to the fact that anchoring Pd-NPs on the surface of the porous ZIF-8 material can effectively improve gas sensing performance by exploiting the high conductivity and catalytic activity of Pd-NPs through electron and chemical sensitisation.