KH2PO4-Assisted Synthesis and Electrochemical Performance of Highly Uniform CuBi2O4 Microspheres Hierarchically Self-Assembled by Nanoparticles

doi:10.1007/s11664-017-5417-9

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	KH2PO4-Assisted Synthesis and Electrochemical Performance of Highly Uniform CuBi2O4 Microspheres Hierarchically Self-Assembled by Nanoparticles
	Wang, Fei; Yang, Hua; Zhang, Yunchuan; Zhang, Haimin
刊名	JOURNAL OF ELECTRONIC MATERIALS
	2017-08
卷号	46 期号:8 页码:4774-4783
关键词	CuBi2O4 self-assembled hierarchical microspheres KH2PO4 electrochemical performance
ISSN号	0361-5235
DOI	10.1007/s11664-017-5417-9
英文摘要	The effect of KH2PO4 on the synthesis of CuBi2O4 microstructures was investigated. The samples were characterized by powder x-ray diffraction (XRD), scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) analysis, x-ray photoelectron spectroscopy (XPS) and ultraviolet (UV)-visible diffuse reflectance spectroscopy. It is demonstrated that the use of KH2PO4 leads to the production of highly uniform CuBi2O4 microspheres hierarchically self-assembled by nanoparticles. With increasing the KH2PO4 concentration from 0.5 M to 1.4 M, the average diameter of the resultant microspheres decreases gradually from 3.3 mu m to 1.4 mu m. However, further increase in the KH2PO4 concentration up to 1.5 M leads to a sudden increase in the average diameter of the resultant microspheres up to 2.3 mu m. In addition, a minor amount of bamboo leaf- or pine needle-like structures are visible in the samples prepared at the KH2PO4 concentrations of 1.0-1.5 M. The bandgap energy of the as-prepared samples is measured to be 1.89 eV by UV-visible diffuse reflectance spectroscopy. The electrochemical performance of the samples was investigated by cyclic voltammetry, galvanostatic charge-discharge measurements, and electrochemical impedance spectroscopy in 2 M KOH electrolyte. Among the hierarchical microspheres, those prepared at the KH2PO4 concentration of 1.4 M deliver a relatively higher specific capacitance due to their smaller size (1284 F g(-1) at a current density of 2 A g(-1)).
资助项目	National Natural Science Foundation of China[51262018][51662027]
WOS研究方向	Engineering ; Materials Science ; Physics
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000404530900011
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/33157]
专题	理学院设计艺术学院
通讯作者	Yang, Hua
作者单位	Lanzhou Univ Technol, Sch Sci, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Wang, Fei,Yang, Hua,Zhang, Yunchuan,et al. KH2PO4-Assisted Synthesis and Electrochemical Performance of Highly Uniform CuBi2O4 Microspheres Hierarchically Self-Assembled by Nanoparticles[J]. JOURNAL OF ELECTRONIC MATERIALS,2017,46(8):4774-4783.
APA	Wang, Fei,Yang, Hua,Zhang, Yunchuan,&Zhang, Haimin.(2017).KH2PO4-Assisted Synthesis and Electrochemical Performance of Highly Uniform CuBi2O4 Microspheres Hierarchically Self-Assembled by Nanoparticles.JOURNAL OF ELECTRONIC MATERIALS,46(8),4774-4783.
MLA	Wang, Fei,et al."KH2PO4-Assisted Synthesis and Electrochemical Performance of Highly Uniform CuBi2O4 Microspheres Hierarchically Self-Assembled by Nanoparticles".JOURNAL OF ELECTRONIC MATERIALS 46.8(2017):4774-4783.