Preparation of Cu-Zn/ZnO core-shell nanocomposite by surface modification and precipitation process in aqueous solution and its photoluminescence properties

Journal Article · Thu Nov 09 00:00:00 EST 2006 · Materials Research Bulletin

DOI:https://doi.org/10.1016/j.materresbull.2006.03.033· OSTI ID:20891953

Nan, Yang ^[1]; Haibin, Yang ^[2]; Yuqiu, Qu ^[1]; Fan, Yuzun ^[1]; Lianxia, Chang ^[1]; Hongyang, Zhu ^[1]; Minghui, Li ^[1]; Guangtian, Zou ^[1]

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1. National Laboratory of Superhard Materials, Jilin University, Changchun 130012 (China)
2. National Laboratory of Superhard Materials, Jilin University, Changchun 130012 (China) and School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454003 (China)

A novel core-shell structure material, Cu-Zn/ZnO, was prepared by a surface modification precipitation process in aqueous solution at low temperature. A nucleation and crystal growth model for this structure was proposed. The resultant nanocomposites were characterized by X-ray diffraction, transmission electron microscope, field emission scanning electron microscope and photoluminescence spectroscope. Results showed that 20-50 nm thick ZnO shell was obtained on the surface of Cu-Zn nanopowders directly in the aqueous solution at 40 deg. C during the precipitation process and as-synthesized materials have a strong ultraviolet luminescence peak around 379-390 nm, but no usual defect-related emissions in visible range. The quantum confinement effect of ZnO nanocrystals, the presence of Cu and Zn atoms and absence of defects in ZnO layer are believed responsible for the characteristics of the photoluminescence spectra.

• OSTI ID: 20891953
• Journal Information: Materials Research Bulletin, Vol. 41, Issue 11; Other Information: DOI: 10.1016/j.materresbull.2006.03.033; PII: S0025-5408(06)00129-2; Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AQUEOUS SOLUTIONS
CHEMICAL PREPARATION
COMPOSITE MATERIALS
COPPER
CRYSTAL DEFECTS
CRYSTAL GROWTH
FIELD EMISSION
LAYERS
NANOSTRUCTURES
PHOTOLUMINESCENCE
PRECIPITATION
SCANNING ELECTRON MICROSCOPY
SHELLS
TRANSMISSION ELECTRON MICROSCOPY
ULTRAVIOLET RADIATION
X-RAY DIFFRACTION
ZINC OXIDES