Enhanced gas-sensing performance of metal@ZnO core-shell nanoparticles towards ppb-ppm level benzene: the role of metal-ZnO hetero-interfaces

doi:10.1039/c8nj04621b

	Enhanced gas-sensing performance of metal@ZnO core-shell nanoparticles towards ppb-ppm level benzene: the role of metal-ZnO hetero-interfaces
	Gong, Yan 1,2; Wu, Xiaofeng 1; Chen, Jiayuan 1,2; Li, Wenhui 1,2; Han, Ning 1; Zhang, Donghai 1; Chen, Yunfa 1
刊名	NEW JOURNAL OF CHEMISTRY
	2019-02-07
卷号	43 期号:5 页码:2220-2230
ISSN号	1144-0546
DOI	10.1039/c8nj04621b
英文摘要	Core-shell metal@ZnO nanoparticles including Au@ZnO, Pd@ZnO and Pt@ZnO were synthesized and utilized for sensing low-concentration benzene. Various techniques were used to characterize the compositional properties of the typical core@shell structure and analyze the relation between the sensing properties and the metal-ZnO hetero-interfaces. When applied as gas-sensing materials, all three core-shell metal@ZnO nanoparticles showed better sensing performance than pure ZnO nanoparticles towards low concentration benzene. In particular, the gas-sensing response of the Pt@ZnO core-shell nanoparticles was 7 times higher than that of pure ZnO towards 0.1 ppm benzene and 63 times higher towards 5 ppm benzene, which was more sensitive than most gas-sensing materials in previous literature. Furthermore, the Pt@ZnO core-shell nanoparticles presented an ultra-low detection limit of no less than 10 ppb, which was lower than those of most gas-sensing materials in previous literature. Besides, the Pt@ZnO core-shell nanoparticles showed high selectivity and long-term response stability with a response value of 2.7 +/- 1.6% towards 1 ppm benzene after operating for a month. The enhanced gas-sensing performances of the metal@ZnO core-shell nanoparticles are well correlated to the work function differences between the contacted metal and ZnO within the metal-ZnO hetero-interfaces, which produce high Schottky energy barriers and modulate the electron transfer.
资助项目	National Natural Science Foundation of China[51672273] ; National Natural Science Foundation of China[51272253] ; Strategic Project of Science and Technology of Chinese Academy of Sciences[XDB05050000]
WOS关键词	ORGANIC-COMPOUNDS VOCS ; AU NANOPARTICLES ; HIERARCHICAL STRUCTURES ; OXIDE NANOSTRUCTURES ; SENSORS ; NANOSPHERES ; MORPHOLOGY ; IN2O3 ; SIZE ; NANOCRYSTALS
WOS研究方向	Chemistry
语种	英语
出版者	ROYAL SOC CHEMISTRY
WOS记录号	WOS:000459581000018
资助机构	National Natural Science Foundation of China ; Strategic Project of Science and Technology of Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/27981]
专题	中国科学院过程工程研究所
通讯作者	Wu, Xiaofeng; Chen, Yunfa
作者单位	1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, 19 A Yuquan Rd, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Gong, Yan,Wu, Xiaofeng,Chen, Jiayuan,et al. Enhanced gas-sensing performance of metal@ZnO core-shell nanoparticles towards ppb-ppm level benzene: the role of metal-ZnO hetero-interfaces[J]. NEW JOURNAL OF CHEMISTRY,2019,43(5):2220-2230.
APA	Gong, Yan.,Wu, Xiaofeng.,Chen, Jiayuan.,Li, Wenhui.,Han, Ning.,...&Chen, Yunfa.(2019).Enhanced gas-sensing performance of metal@ZnO core-shell nanoparticles towards ppb-ppm level benzene: the role of metal-ZnO hetero-interfaces.NEW JOURNAL OF CHEMISTRY,43(5),2220-2230.
MLA	Gong, Yan,et al."Enhanced gas-sensing performance of metal@ZnO core-shell nanoparticles towards ppb-ppm level benzene: the role of metal-ZnO hetero-interfaces".NEW JOURNAL OF CHEMISTRY 43.5(2019):2220-2230.