Abstract
In this study, a novel hollow sphere CdS/MWCNTs composite photocatalytic material was prepared by hydrothermal method and was first used for the photocatalytic degradation of sodium butyl xanthate (SBX) in sulfide mineral processing wastewater. The morphology structure and photocatalytic properties of hollow sphere CdS/MWCNTs composite catalyst were studied by scanning electron microscopy (SEM), X-ray diffraction (XRD), ultraviolet-visible diffuse reflectance spectroscopy (UV–vis DRS), thermogravimetric analysis (TGA) and photocatalytic activity experiments. The results showed that 15 mg CdS/MWCNTs with the 5 % MWCNTs doping amount possessed the highest photocatalytic degradation efficiency for SBX which the degradation rate reach 99 %. The hollow sphere structure and addition of MWCNTs obviously improved the migration and separation of photogenerated electrons (e−) and holes (h+) of pure CdS, leading to high photocatalytic efficiency.
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