© The Institution of Engineering and Technology
An easy alkali treatment method is designed to enhance the activity of Co0.01Zn0.99S (CZS). After alkali treatment, the surface area of CZS increases by 2.8 times (12.8 versus 3.4 m2g−1), and the oxidation potential (E VB) of valence band also increases greatly (2.55 versus 2.19 V). After treatment, the UV-light activity has increased by 3.4 times for the degradation of dye. This simple, low-cost method may be extended to mass production for practical applications.
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