5 years ago

Phase- and Morphology-Controlled Synthesis of Zinc Molybdate for Excellent Photocatalytic Property

Mingyun Guan, Hai-Lang Jia, Yan Zhuang, Dongming Wang, Jianhua Sun, Maozhan Huang
The paper reported phase- and morphology-controlled synthesis of zinc molybdate via a hydrothermal route. With the increase in the monomer concentrations, the morphology and phase of the products transferred from ZnMoO4 plate with monoclinic phase to ZnMoO4*0.8H2O rod-bundle with triclinic phase. Morphology and phase conversion of the products were monitored with the help of SEM, TEM, and XRD. A possible formation mechanism of the product was proposed. The optic properties of zinc molybdate were characterized. The band gap values of zinc molybdate stood in the range of approximately 2.71-3.05 eV. With the use of photocatalytic degradation of RhB being a probe reaction, photocatalytic performance of α- and β-zinc molybdate was investigated. The degradation efficiency of RhB over calcined α-ZnMoO4*0.8H2O was up to 89%. The calcined β-ZnMoO4 plate exhibited the highest activity for degradation of RhB, up to 98%. The radical trapping experiments evidenced *O2- and h+ to be the mainly reactive species. Some possible reasons for influencing the photocatalytic activity of the products were discussed.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/ejic.201701066

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