Heterogeneous Sensitization of Metal-Organic Framework Driven Metal@Metal Oxide Complex Catalysts on an Oxide Nanofiber Scaffold Toward Superior Gas Sensors
- Authors
- Koo, Won-Tae; Choi, Seon Jin; Kim, Sang-Joon; Jang, Ji-Soo; Tuller, Harry L.; Kim, Il-Doo
- Issue Date
- Sep-2016
- Publisher
- AMER CHEMICAL SOC
- Citation
- JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, v.138, no.40, pp.13431 - 13437
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
- Volume
- 138
- Number
- 40
- Start Page
- 13431
- End Page
- 13437
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/22178
- DOI
- 10.1021/jacs.6b09167
- ISSN
- 0002-7863
- Abstract
- We report on the heterogeneous sensitization of metal-organic framework (MOF)-driven metal-embedded metal oxide (M@MO) complex catalysts onto semiconductor metal oxide (SMO) nanofibers (NFs) via electrospinning for markedly enhanced chemical gas sensing. ZIF-8-derived Pd-loaded ZnO nanocubes (Pd@ZnO) were sensitized on both the interior and the exterior of WO3 NFs, resulting in the formation of multiheterojunction Pd-ZnO and ZnO WO3 interfaces. The Pd@ZnO loaded WO3 NFs were found to exhibit unparalleled toluene sensitivity (R-air/R-gas = 4.37 to 100 ppb), fast gas response speed (similar to 20 s) and superior cross-selectivity against other interfering gases. These results demonstrate that MOF-derived M@MO complex catalysts can be functionalized within an electrospun nanofiber scaffold, thereby creating multiheterojunctions, essential for improving catalytic sensor sensitization.
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