期刊
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
卷 11, 期 11, 页码 9506-9512出版社
AMER SCIENTIFIC PUBLISHERS
DOI: 10.1166/jnn.2011.5269
关键词
Hydrothermal; Metastable ZnMoO4; Optical Property; Photocatalytic Activity
类别
资金
- National Natural Science Foundation of China [20967004]
- Ministry of Education [Z2004-2-15028, Z2007-1-01034]
- inner Mongolia National Science Foundation [2010Zd08]
- scientific research foundation for the returned overseas Chinese scholars of Ministry of Education [2006-331]
- Scientific and Technological Innovation Team of Inner Mongolia University [12110614]
- Inner Mongolia University [Z20090106]
Metastable monoclinic ZnMoO4 was successfully synthesized via a hydrothermal route with variation of reaction temperatures and time at pH value of 5.7. Systematic sample characterizations were carried out, including X-ray powder diffraction, scanning electron microscopy, Fourier transformed infrared spectra, UV-visible diffuse reflectance spectra, and photoluminescence spectra. The results show that all as-prepared ZnMoO4 samples were demonstrated to crystallize in a pure-phase of monoclinic wolframite structure. All samples were formed in plate-like morphology. Six IR active vibrational bands were observed in the wave number range of 400-900 cm(-1). The band gap of as-prepared ZnMoO4 was estimated to be 2.86 eV by Tauc equation. Photoluminescence measurement indicates that as-prepared ZnMoO4 exhibits a broad blue-green emission under excitation wavelength of 280 nm at room temperature. Photocatalytic activity of as-prepared ZnMoO4 was examined by monitoring the degradation of methyl orange dye in an aqueous solution under UV radiation of 365 nm. The as-prepared ZnMoO4 obtained at 180 degrees C for 40 h showed the best photocatalytic activity with completing degradation of MO in irradiation time of 120 min. Consequently, monoclinic ZnMoO4 proved to be an efficient near visible light photocatalyst.
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