Microfluidic synthesis of Ag@Cu2O core-shell nanoparticles with enhanced photocatalytic activity

doi:10.1016/j.jcis.2016.09.051

	Microfluidic synthesis of Ag@Cu2O core-shell nanoparticles with enhanced photocatalytic activity
	Yang, Mei 1; Tao, Sha 1,2; Chen, Huihui 1,2; Ren, Mingyue 1,2; Chen, Guangwen 1
刊名	JOURNAL OF COLLOID AND INTERFACE SCIENCE
	2017-01-15
卷号	486 页码:16-26
关键词	Core-shell Ag@cu2o Microreactor Continuous Photocatalytic
ISSN号	0021-9797
DOI	10.1016/j.jcis.2016.09.051
文献子类	Article
英文摘要	A microfluidic-based method for the continuous synthesis of Ag@Cu2O core-shell nanoparticles (NPs) has been developed. It only took 32 s to obtain Ag@Cu2O core-shell NPs, indicating a high efficiency of this microfluidic-based method. Triangular Ag nanoprisms were employed as the cores for the overgrowth of Cu2O through the reduction of Cu(OH)(4) with ascorbic acid. The as-synthesized samples were characterized by XRD, TEM, SEM, HAADF-STEM, EDX, HRTEM, UV-vis spectra and N-2 adsorption-desorption. The characterization results revealed that the as-synthesized Ag@Cu2O core-shell NPs exhibited a welldefined core-shell nanostructure with a polycrystalline shell, which was composed of numbers of Cu2O domains epitaxially growing on the triangular Ag nanoprism. It was concluded that the synthesis parameters such as the molar ratio of trisodium citrate to AgNO3, H2O2 to AgNO3, NaOH to CuSO4, ascorbic acid to CuSO4 and AgNO3 to CuSO4 had significant effect on the synthesis of Ag@Cu2O core-shell NPs. Moreover, Ag@Cu2O core-shell NPs exhibited superior catalytic activity in comparison with pristine Cu2O NPs towards the visible light-driven degradation of methyl orange. This enhanced photocatalytic activity of Ag@Cu2O core-shell NPs was attributed to the larger BET surface area and improved charge separation efficiency. The trapping experiment indicated that holes and superoxide anion radicals were the major reactive species in the photodegradation of methyl orange over Ag@Cu2O core-shell NPs. In addition, Ag@Cu2O core-shell NPs showed no obvious deactivation in the cyclic test. (C) 2016 Elsevier Inc. All rights reserved.
WOS关键词	SURFACE-PLASMON RESONANCE ; CU2O HOLLOW SPHERES ; VISIBLE-LIGHT ; OPTICAL-PROPERTIES ; SILVER NANOPRISMS ; ROOM-TEMPERATURE ; MASS-TRANSFER ; NANOSTRUCTURES ; AG ; FLOW
WOS研究方向	Chemistry
语种	英语
出版者	ACADEMIC PRESS INC ELSEVIER SCIENCE
WOS记录号	WOS:000387097100003
内容类型	期刊论文
源URL	[http://cas-ir.dicp.ac.cn/handle/321008/169792]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
通讯作者	Yang, Mei; Chen, Guangwen
作者单位	1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Yang, Mei,Tao, Sha,Chen, Huihui,et al. Microfluidic synthesis of Ag@Cu2O core-shell nanoparticles with enhanced photocatalytic activity[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2017,486:16-26.
APA	Yang, Mei,Tao, Sha,Chen, Huihui,Ren, Mingyue,&Chen, Guangwen.(2017).Microfluidic synthesis of Ag@Cu2O core-shell nanoparticles with enhanced photocatalytic activity.JOURNAL OF COLLOID AND INTERFACE SCIENCE,486,16-26.
MLA	Yang, Mei,et al."Microfluidic synthesis of Ag@Cu2O core-shell nanoparticles with enhanced photocatalytic activity".JOURNAL OF COLLOID AND INTERFACE SCIENCE 486(2017):16-26.