期刊
ACS CENTRAL SCIENCE
卷 7, 期 7, 页码 1176-1182出版社
AMER CHEMICAL SOC
DOI: 10.1021/acscentsci.1c00289
关键词
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资金
- National Research Foundation of Korea - Korea government [2020R1A2C3008933]
- Korea Environmental Industry & Technology Institute [2020002700011]
- National Research Foundation of Korea [2020R1A2C3008933, 4120200513611] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The hybrid of Cu-3(HHTP)(2) nanoflakes and Fe2O3 nanoparticles shows highly sensitive, selective, and reversible detection of NO2, providing a new strategy for designing high-performance MOF-based gas sensors.
Metal-organic frameworks (MOFs) with high surface area, tunable porosity, and diverse structures are promising platforms for chemiresistors; however, they often exhibit low sensitivity, poor selectivity, and irreversibility in gas sensing, hindering their practical applications. Herein, we report that hybrids of Cu-3(HHTP)(2) (HHTP = 2,3,6,7,10,11-hexahydroxytriphenylene) nanoflakes and Fe2O3 nanoparticles exhibit highly sensitive, selective, and reversible detection of NO2 at 20 degrees C. The key parameters to determine their response, selectivity, and recovery are discussed in terms of the size of the Cu-3(HHTP)(2) nanoflakes, the interaction between the MOFs and NO2, and an increase in the concentration and lifetime of holes facilitated by visible-light photoactivation and charge-separating energy band alignment of the hybrids. These photoactivated MOF-oxide hybrids suggest a new strategy for designing high-performance MOF-based gas sensors.
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