Title:Derived from Metal-Organic Frameworks for ppb-Level Gas Sensing

Place of Publication:Advanced Materials, vol.31, 1807161, 2019

Brief Introduction:Surmounting the inhomogeniety issue of gas sensors and realizing their reproducible ppb-level gas sensing are highly desirable for widespread deployments of sensors to build networks in applications of industrial safety and indoor/outdoor air quality monitoring. Herein, a strategy is proposed to substantially improve the surface homogeneity of sensing materials and gas sensing performance via chip-level pyrolysis of as-grown ZIF-L (ZIF stands for zeolitic imidazolate framework) films to porous and hierarchical zinc oxide (ZnO) nanosheets. A novel approach to generate adjustable oxygen vacancies is demonstrated, through which the electronic structure of sensing materials can be fine-tuned. Their presence is thoroughly verified by various techniques. The sensing results demonstrate that the resultant oxygen vacancy-abundant ZnO nanosheets exhibit significantly enhanced sensitivity and shortened response time toward ppb-level carbon monoxide (CO) and volatile organic compounds encompassin

Discipline:Engineering

First-Level Discipline:Engineering

Translated or Not:No

Electronic Link:https://onlinelibrary.wiley.com/doi/full/10.1002/adma.201807161

Release Time:2020-06-28