Green hydrothermal synthesis and optical absorption properties of ZnO2 nanocrystals and ZnO nanorods |
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| Authors: | Tian Hong GuoYan Liu Yong Cai Zhang Ming Zhang |
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| Affiliation: | Key Laboratory of Environmental Material and Environmental Engineering of Jiangsu Province, College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou 225002, China |
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| Abstract: | A green hydrothermal method was proposed for the controllable synthesis of ZnO2 nanocrystals and ZnO nanorods, using the common and cost-effective 2ZnCO3·3Zn(OH)2 powder and 30 mass% H2O2 aqueous solution as the raw materials. The characterization results from X-ray diffraction, high resolution transmission electron microscopy, transmission electron microscopy and energy dispersive X-ray spectroscopy indicated that the products synthesized at 100-120 °C for 6 h or at 170 °C for 0 h were cubic phase ZnO2 nanocrystals; while those synthesized at 170 °C for 3-6 h were hexagonal phase ZnO nanorods. The UV-vis absorption spectra showed that the as-synthesized ZnO2 nanocrystals and ZnO nanorods had optical band gaps of about 4.1 and 3.3 eV, respectively. |
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| Keywords: | Semiconductors Nanocrystalline materials Optical materials and properties Microstructure Zinc peroxide and oxide |
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