Journal
JOURNAL OF MATERIALS CHEMISTRY
Volume 21, Issue 29, Pages 10750-10754Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c0jm04405a
Keywords
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Funding
- Fundamental Research Funds of the Central University [HEUCF101010]
- Education Department of Heilongjiang Province [11553044]
- China Post-doctoral Science Foundation [AUGA41309003]
- Special Innovation Talents of Harbin Science and Technology [2010RFXXG007]
- foundation of Harbin Engineering University [HEUFT07053]
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To enrich the variety of zinc oxide, a facile trisodium citrate assisted alkaline precipitation route was developed to prepare ZnO hollow spheres with partial open gaps comprised of a mass of nanoparticles. The composition, morphology and structure of the product were characterized by X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results showed that the final products were pure hexagonal phase (zincite), and the ZnO shell was composed of a polycrystalline aggregation of nanoparticles. Trisodium citrate played a crucial role as a capping agent in the formation of the ZnO hollow spheres. The ZnO with hollow morphology exhibited excellent gas response. This result indicated that the annealed ZnO with hollow sphere architecture is a promising candidate for gas sensing applications.
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