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Different Preparation and Photocatalytic Performance of g-C
3N
4/WO
3 Heterojunctions
Liang Hongyu, Li Jianzhong, Tian Yanwen, Zou He, Hu Shaozheng
Three different methods (ultrasonic dispersion, hydrothermal method and calcination) were used to prepared g-C
3N
4/WO
3 heterojunctions. Obtained catalysts were characterized with X-ray diffraction (XRD), UVvis spectroscopy, nitrogen adsorption, X-ray photoelectron spectroscopy (XPS), photoluminescence (PL), and Electrochemical impedance spectroscopy (EIS). The results showed that the interaction between g-C
3N
4/WO
3 and WO
3 was obviously affected by the preparation methods, resulting in the significant difference in separation rate of photogenerated electrons and holes. The photocatalytic performances were detected in photocatalytic Rhodamine B (RhB) degradation under simulated visible light. The results indicated that activities of g-C
3N
4/WO
3 heterojunction composites were evidently higher than that of single g-C
3N
4/WO
3 or WO
3 semiconductor, and the heterojunction semiconductor prepared by the hydrothermal method showed the highest photocatalytic activity.
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