Abstract
Herein, the optional and controllable growth of Bi2S3 onto NH2-MIL-125 via covalent conjunction strategy was reported. The experimental results demonstrate that the obtained heterojunction exhibits boosting photocatalytic reduction CO2 and organic dye degradation. The 18-Bi2S3@NH2-MIL-125-SH displays the highest yield of 12.46 μmol g−1h−1 of CO, >13 times that of pure NH2-MIL-125. Meanwhile, the reaction kinetic of 18-Bi2S3@NH2-MIL-125-SH in the degradation of methylene blue is uppermost, which is 160 times than that of the commercial P25. The enhancement of photocatalytic performance could be ascribed to the covalent coordination-driven intimate interfacial interaction in n-scheme heterojunction. Meanwhile, the plausible mechanism was also investigated by UV–vis diffuse reflectance (UV–vis), photoluminescence (PL), electrochemical photocurrent, electron spin resonance (ESR) and electrochemical impedance spectroscopy (EIS).
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