Preferentially epitaxial growth of beta-FeOOH nanoflakes on SnO2 hollow spheres allows the synthesis of SnO2/alpha-Fe2O3 hetero-nanocomposites with enhanced gas sensing performance for dimethyl disulfide

doi:10.1016/j.snb.2018.06.002

CORC > 合肥物质科学研究院 > 中国科学院合肥物质科学研究院 > 中科院固体物理研究所

	Preferentially epitaxial growth of beta-FeOOH nanoflakes on SnO2 hollow spheres allows the synthesis of SnO2/alpha-Fe2O3 hetero-nanocomposites with enhanced gas sensing performance for dimethyl disulfide
	Liu, Bo1,2 ; Gao, Lei 1; Zhou, Fei 1; Duan, Guotao 1
刊名	SENSORS AND ACTUATORS B-CHEMICAL
	2018-11-01
卷号	272 页码:348-360
关键词	Preferentially epitaxial growth SnO2/alpha-Fe2O3 hetero-nanocomposite Electron accumulation layer Gas sensing performance Dimethyl disulfide
ISSN号	0925-4005
DOI	10.1016/j.snb.2018.06.002
通讯作者	Duan, Guotao(duangt@issp.ac.cn)
英文摘要	Hetero-nanocomposites have shown extraordinary potential for improving the properties of nanomaterials originated from the interfacial interaction. Herein, we report the synthesis of the "sea urchin"-like SnO2/alpha-Fe2O3 hetero-nanocomposites, which was constituted of SnO2 hollow spheres and a-Fe2O3 needle-like nanoparticles, via integrating a two-step hydrothermal route with an annealing process. The detailed studies revealed that the preferentially epitaxial growth of two-dimensional beta-FeOOH nanonanoflakes on three-dimensional SnO2 hollow spheres in the second hydrothermal process is the main reason for the formation of such hetero-nanocomposites, which is also directly observed by the characterization on high resolution transmission electron microscopy. Significantly, such SnO2/alpha-Fe2O3 hetero-nanocomposites were demonstrated as a promising sensing material for dimethyl disulfide and showed excellent gas sensing performances, prominently superior to the gas sensor based on pristine SnO2 hollow spheres. More importantly, further H-2-TPR, CO-TPR and NH3-TPD measurements for such hetero-nanocomposites shows that the enhanced sensing performances probably arise from the improvement of oxidizability induced by change of surface basic property of nanocomposites, as well as the formation of "electron accumulation layer" driven by the heterojunctions between SnO2 and alpha-Fe2O3.
资助项目	National Key R&D Program of China[2016YFC0201103] ; Natural Science Foundation of China[11674320] ; Natural Science Foundation of China[51471161] ; Youth Innovation Promotion Association CAS ; Key Research Projects of the Frontier Science CAS[QYZDB-SSW-JSC017]
WOS关键词	LITHIUM-ION BATTERIES ; ULTRASENSITIVE DETECTION ; HETEROSTRUCTURES ; NANOSHEETS ; NANORODS ; SENSORS ; FE2O3 ; OXIDE ; TIO2 ; H2S
WOS研究方向	Chemistry ; Electrochemistry ; Instruments & Instrumentation
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000439715000043
资助机构	National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; National Key R&D Program of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; Natural Science Foundation of China ; 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内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/37775]
专题	合肥物质科学研究院_中科院固体物理研究所
通讯作者	Duan, Guotao
作者单位	1.Chinese Acad Sci, Inst Solid State Phys, Anhui Key Lab Nanomat & Nanotechnol, Key Lab Mat Phys, Hefei 230031, Peoples R China 2.Univ Sci & Technol China, Hefei 230026, Peoples R China
推荐引用方式 GB/T 7714	Liu, Bo,Gao, Lei,Zhou, Fei,et al. Preferentially epitaxial growth of beta-FeOOH nanoflakes on SnO2 hollow spheres allows the synthesis of SnO2/alpha-Fe2O3 hetero-nanocomposites with enhanced gas sensing performance for dimethyl disulfide[J]. SENSORS AND ACTUATORS B-CHEMICAL,2018,272:348-360.
APA	Liu, Bo,Gao, Lei,Zhou, Fei,&Duan, Guotao.(2018).Preferentially epitaxial growth of beta-FeOOH nanoflakes on SnO2 hollow spheres allows the synthesis of SnO2/alpha-Fe2O3 hetero-nanocomposites with enhanced gas sensing performance for dimethyl disulfide.SENSORS AND ACTUATORS B-CHEMICAL,272,348-360.
MLA	Liu, Bo,et al."Preferentially epitaxial growth of beta-FeOOH nanoflakes on SnO2 hollow spheres allows the synthesis of SnO2/alpha-Fe2O3 hetero-nanocomposites with enhanced gas sensing performance for dimethyl disulfide".SENSORS AND ACTUATORS B-CHEMICAL 272(2018):348-360.