Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 12, Issue 23, Pages 26161-26169Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c04580
Keywords
MOFs; IGO; ZnO; core-shell; nanotubes; acetone detection
Funding
- Natural Science Foundation of China [11564042]
- Department of Science and Technology of Yunnan Province [2018FB091, 2019FB129]
- Project of the Department of Education of Yunnan Province [2019J0001]
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The development of acetone gas sensors is desirable but challenging for both air quality monitoring and medical diagnosis. Herein, starting from bimetallic In/Ga metal-organic frameworks (MOFs) (MIL-68 (In/Ga)), a facile strategy is proposed to couple with zinc ions to design In/Ga oxide (IGO)@ZnO core-shell nanotubes for efficient acetone detection. In such a heterostructure, tiny ZnO nanoparticles are closely decorated on IGO nanotubes, which is beneficial to enlarge the specific surface area and create rich oxygen vacancies and heterojunction interfaces. Benefiting from the structural merits and synergetic effects, the IGO@ZnO-based gas sensor exhibits a low detection limitation (200 ppb), a high response, good linearity relationship between the sensing responses and wide testing acetone concentrations, and fast response and recovery time (6.8/6.1 s) with good selectivity and stability. These sensing performances strongly indicate the practical application to quantitatively detect acetone.
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