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Core-shell Au@ZnO nanoparticles derived from Au@MOF and their sub-ppm level acetone gas-sensing performance
Li, Wenhui1,2; Wu, Xiaofeng1; Han, Ning1; Chen, Jiayuan1,2; Tang, Wenxiang3; Chen, Yunfa1
2016-12-01
Source PublicationPOWDER TECHNOLOGY
ISSN0032-5910
Volume304Issue:DECPages:241-247
Abstract

Noble metal@metal oxides have attracted extensive attention as gas-sensing materials due to the formation of Schottky junction, modulating surface physicochemical properties of oxide nanomaterials. Herein, a facile way was developed to construct core-shell Au@ZnO nanoparticles through direct pyrolysis of Au@Zn-based metal-organic framework (MOF). The obtained Au@ZnO nanoparticles have -50 nm Au nanoparticles as cores and interpenetrated ZnO nanoparticles (-20 nm) as porous shells. When applied as gas-sensing materials, the unique core-shell Au@ZnO nanoparticles exhibited significantly enhanced gas-sensing response and selectivity towards sub-ppm level acetone at 300 degrees C. The response value of Au@ZnO nanoparticles was 11 times higher than that of singular ZnO nanopartides towards 1 ppm of acetone. The enhanced gas-sensing properties are ascribed to the electronic and chemical sensitization of Au nanoparticles, due to the formation of Schottky junction within AuZnO hetero-interface of core-shell nanoparticles. (C) 2016 Elsevier B.V. All rights reserved.

KeywordCore-shell Au@zno Nanoparticles Au@mof Sub-ppm Level Schottky Junction
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.powtec.2016.08.028
Indexed BySCI ; ISTP
Language英语
WOS KeywordVOLATILE ORGANIC-COMPOUNDS ; ROOM-TEMPERATURE ; FACILE SYNTHESIS ; SOLUTION-PHASE ; HOLLOW ; SENSORS ; HETEROSTRUCTURE ; FABRICATION ; FRAMEWORKS ; NANOWIRES
WOS Research AreaEngineering
WOS SubjectEngineering, Chemical
WOS IDWOS:000389394500026
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/21828
Collection多相复杂系统国家重点实验室
Affiliation1.Chinese Acad Sci, State Key Lab Multiphase Complex Syst, Inst Proc Engn, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
3.Univ Connecticut, Inst Mat Sci, Storrs, CT 06269 USA
Recommended Citation
GB/T 7714
Li, Wenhui,Wu, Xiaofeng,Han, Ning,et al. Core-shell Au@ZnO nanoparticles derived from Au@MOF and their sub-ppm level acetone gas-sensing performance[J]. POWDER TECHNOLOGY,2016,304(DEC):241-247.
APA Li, Wenhui,Wu, Xiaofeng,Han, Ning,Chen, Jiayuan,Tang, Wenxiang,&Chen, Yunfa.(2016).Core-shell Au@ZnO nanoparticles derived from Au@MOF and their sub-ppm level acetone gas-sensing performance.POWDER TECHNOLOGY,304(DEC),241-247.
MLA Li, Wenhui,et al."Core-shell Au@ZnO nanoparticles derived from Au@MOF and their sub-ppm level acetone gas-sensing performance".POWDER TECHNOLOGY 304.DEC(2016):241-247.
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