纳米棒
材料科学
复合数
金属有机骨架
化学工程
锌
涂层
金属
纳米技术
复合材料
化学
冶金
有机化学
吸附
工程类
作者
Bo Huang,Wen Zeng,Yanqiong Li
出处
期刊:Journal of The Electrochemical Society
[The Electrochemical Society]
日期:2022-04-01
卷期号:169 (4): 047508-047508
被引量:6
标识
DOI:10.1149/1945-7111/ac61be
摘要
It is an effective way to produce core–shell composite materials by coating nano-metal oxides with metal-organic framework. A self-sacrificial method was reported. ZnO was transformed into ZIF-8 and attached to ZnO. Through the in situ transformation of zinc oxide particles in the matrix, a great many pores are formed to ensure that all parts of ZnO can contact the gas. ZnO has three main functions, providing Zn 2+ for ZIF-8 and serving as a template for ZIF-8’s growth, and as an active material to detect gases. ZIF-8 has two functions. Firstly, it has hydrophobicity to avoid the impact of steam on the gas detection of ZnO; secondly, it can provide a large amount of pores, increase the specific surface area. A great many defects created at the interface of the two materials increases the active sites. The gas-sensing performance of ZnO to volatile organic compounds can be improved using the advantages of both materials. The composite sensor has an optimal operating temperature of 350 °C and has more than tripled its response to 50 ppm gases relative to the ZnO sensor. In addition, a gas-sensing mechanism is proposed. An effective strategy for developing high-response VOC sensors is presented in this work.
科研通智能强力驱动
Strongly Powered by AbleSci AI