Rational design of coaxial CdS@ZnO nanowire array for efficient photodegradation of organic pollutants

Herein, a novel coaxial CdS@ZnO nanowire array catalyst was synthesized by magnetron sputtering and hy-drothermal method. The optimum photocatalytic composite was obtained by controlling the ratio of CdS and ZnO. Take methylene blue (MB) as the model, the CdS@ZnO nanowire array (CdS@ZnO-10) exhibited strong photocatalytic solid activity, and the highest adsorption and photodegradation rate of MB reached 90.38 % in 50 min and 99.13 % in 120 min under simulated sunlight illumination. The mechanism of the heterojunction interface affecting photocatalytic performance was studied. Therefore, the synthesis approach could offer new design and controllable construction of coaxial structure for organic dye pollutant degradation.

Automated summary

A novel coaxial CdS@ZnO nanowire array catalyst was synthesized and the optimal photocatalytic composite was obtained by adjusting the ratio of CdS and ZnO. The catalyst exhibited strong photocatalytic solid activity, achieving high adsorption and photodegradation rates for methylene blue under simulated sunlight illumination.