Preparation, Characterization and Photocatalytic Properties of Transition Metal Ions Doping Zn-3(OH)(2)V2O7 center dot 2H(2)O
- 化学化工－已发表论文 
Transition metal ions doping Zn-3(OH)(2)V2O7 center dot 2H(2)O with micro flowerlike morphologies were successfully synthesized by a surfactant-free hydrothermal method, which formula can be presented as Zn3-3xM3x(OH)(2)V2O7 center dot 2H(2)O (M=Cu, Co, Ni, Mn; 0.001 <= x <= 0.02 ). The as-prepared micro flowerlike structures were characterized by means of XRD, SEM, TEM, UV-Vis DRS, EDX and BET techniques. The results of structure and morphology analysis showed that 3d transition metal ions doped samples remained Zn-3(OH)(2)V2O7 center dot 2H(2)O hexagonal structure, and the micro flowerlike structures were assembly of 2D nanosheets with (0001) main crystal facets. In UV-Vis DRS test, the spectra of as-prepared doping samples displayed red-shifts in the band-edge, and the red-shift value of Cu2+ doped sample was largest. It was the first time undoping and transition metal ions doping Zn-3(OH)(2)V2O7 center dot 2H(2)O were used as the photocatalysts for organic pollutant degradation under visible light irradiation. It was found that 0.1at% Cu doped sample Zn2.977Cu0.003 (OH)(2)V2O7 center dot 2H(2)O exhibited the highest photocatalytic activity for visible degradation of methylene blue (MB) among the doping and undoping analogues. Moreover, the influence facts including type and doping concentration of transition metal ions on the visible-light-driven photocatalytic activity of Zn3-3xM3x(OH)(2)V2O7 center dot 2H(2)O were also investigated.