Au/BiOI花状微米球的制备及其对抗生素的降解特性

Preparation of Au/BiOI Composite Flower-like Microspheres and Its Degradation Characteristics to Antibiotics

采用水热法制备BiOI花状微米球,采用光还原法制备Au/BiOI复合材料。BiOI花球由许多的纳米片交错堆积而形成,Au纳米颗粒附着在BiIO花状球的表面。随着Au含量的增加,样品在可见光照射下对MB和TC的降解率逐渐增加,Au-4样品对MB和TC降解率达到95%以上。过量的Au颗粒复合,降低了样品的光吸收性能,从而降低了材料的降解特性。上述结果表明Au/BiOI复合纳米材料在环境保护领域,尤其是对抗生素的降解方面具有潜在的应用价值。

BiOI flower-like microspheres were prepared by hydrothermal method,and then Au/BiOI composite nanomaterials were prepared by photodeposition method.The degradation characteristics of methylene blue and tetracycline by Au/BiOI were studied to investigate the kinetic behaviour of Au/BiOI photocatalysts for the oxidative degradation of antibiotics.The results showed that the degradation rate of Au/BiOI composites on MB was faster than that of pure BiOI materials,and the best degradation rate of Au-4 samples on MB was achieved after 30 min of light exposure,reaching more than 95%.One of the composite Au-4 samples also achieved 95%degradation of tetracycline after 1 h of light exposure.