Heterogeneous sensitization of metal？organic framework driven metal@ metal oxide complex catalysts on an oxide nanofiber scaffold toward superior gas sensors
- Heterogeneous sensitization of metal？organic framework driven metal@ metal oxide complex catalysts on an oxide nanofiber scaffold toward superior gas sensors
- 장지수; 구원태; 최선진; 김상준; Harry L Tuller; 김일두
- Issue Date
- Journal of the American Chemical Society
- VOL 138, NO 40-13437
- 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 (Rair/Rgas = 4.37 to 100 ppb), fast gas response speed (∼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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