Abstract

Photocatalytic redox reactions occur on the surface of the catalyst, and therefore the surface properties of the photocatalyst are vital for efficient catalytic reactions. Bi2MoO6 surface co-doped with Ni2+ and Ti4+ ions was fabricated through an incipient-wetness impregnation technology and calcination method. The influence of Ni2+ and Ti4+ co-doping with different concentrations on the crystal structure, morphology, and optical properties of Bi2MoO6 were investigated by different instrumental methods, and the characterization results confirm that the surface of Bi2MoO6 was doped with Ni2+ and Ti4+ ions. Under visible-light irradiation, the effects of Ni2+ and Ti4+ surface co-doping on the photocatalytic activity of Bi2MoO6 were evaluated by the degradation of rhodamine B, with the results suggesting Ni2+ and Ti4+ co-doping increases visible-light absorption by Bi2MoO6 and promotes the separation of photogenerated charge carriers. With optimum Ni2+ and Ti4+ co-doping, Bi2MoO6 surface co-doped with 0.18% Ni2+ and 0.192% Ti4+ exhibits the greatest photocatalytic activity and stability in the degradation of rhodamine B.

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