Triple assembly of ZnO, large-scale hollow spherical shells with flower-like species consisting of rods grown on the outer surfaces of shells
- Key Laboratory for Advanced Materials, East China University of Science and Technology, Shanghai, 200237 (China)
Novel large-scale hollow ZnO spherical shells were synthesized by ionic liquids assisted hydrothermal oxidization of pure zinc powder without any catalyst at a relatively low temperature of 160 deg. C. X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDX) and scanning electron microscopy (SEM) patterns show that the shells are composed of ZnO and the structure of the shells is very unique. Textured flower-like ZnO consisting of ZnO rods is grown on the outer surfaces of shells forming a triple assembly. Room-temperature photoluminescence spectra of the oxidized material show a sharp peak at 379 nm and a wider broad peak centered at 498 nm. The possible growth mechanism of the triple assembly of ZnO is discussed in detail. - Graphical abstract: A proposed growth mechanism of large scale hollow ZnO. Bubbles provide the aggregation center for ionic liquids that leads to the formation of hollow Zn particle-dotted shells, buoyancy promotes shells to go upward, the breach occurs when shells are subjected to overpressure.
- OSTI ID:
- 21372541
- Journal Information:
- Journal of Solid State Chemistry, Vol. 183, Issue 3; Other Information: DOI: 10.1016/j.jssc.2010.01.009; PII: S0022-4596(10)00010-1; Copyright (c) 2010 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; ISSN 0022-4596
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CATALYSTS
LIQUIDS
PHOTOLUMINESCENCE
SCANNING ELECTRON MICROSCOPY
SHELLS
SPECTRA
SPHERICAL CONFIGURATION
SURFACES
TEMPERATURE RANGE 0273-0400 K
TEMPERATURE RANGE 0400-1000 K
X-RAY DIFFRACTION
X-RAY SPECTROSCOPY
ZINC
ZINC OXIDES
CHALCOGENIDES
COHERENT SCATTERING
CONFIGURATION
DIFFRACTION
ELECTRON MICROSCOPY
ELEMENTS
EMISSION
FLUIDS
LUMINESCENCE
METALS
MICROSCOPY
OXIDES
OXYGEN COMPOUNDS
PHOTON EMISSION
SCATTERING
SPECTROSCOPY
TEMPERATURE RANGE
ZINC COMPOUNDS