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Structural and optical properties of ZnO nanopowder prepared by microwave-assisted synthesis |
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| Authors: | YC Lee CS Yang SY Hu CF Cheng MK Tsai |
| Institution: | a Department of Electronic Engineering and Research Center for Micro/Nano Technology, Tungnan University, Taipei, Taiwan b Graduate Institute of Electro-optical Engineering, Tatung University, Taipei, Taiwan c Department of Electrical Engineering, Tung Fang Institute of Technology, Kaohsiung, Taiwan d Department of Materials Engineering, Ming Chi University of Technology, Taipei, Taiwan e Chemistry Department, Chung Yuan Christian University, Chung-Li, Taiwan |
| Abstract: | We report the characterization of nano-size zinc oxide (ZnO) powder synthesized via microwave-assisted heating of Zn(CH3COO)2·2H2O and NaHCO3 solution with deionized water (DI water) as the solvent. The as-synthesized ZnO powder was calcined at temperatures from 400 to 800 °C for 8 h. The X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR) spectra revealed pure wurtzite structure for the ZnO nanopowder (NP) calcined at 800 °C. Scanning electron microscopy (SEM) images showed increasing size ZnO NP with uniform size distribution with increase in calcination temperature. Significant UV emission at about 373 nm has been observed in the photoluminescence (PL) spectra of the as-synthesized and calcined ZnO NP. Our results showed enhanced PL intensity with a reduced full-width at half-maximum (FWHM) for ZnO NP synthesized at higher calcination temperature. |
| Keywords: | Zinc oxide Microwave-assisted synthesis X-ray diffraction Photoluminescence |
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