Construction of mesoporous carbon nitride/binary metal sulfide heterojunction photocatalysts for enhanced degradation of pollution under visible light

摘要: Abstract A novel binary metal sulfide fabricated with mesoporous carbon nitride (mpg-C 3 N 4 /SnCoS ) was synthesized by the simple in situ hydrothermal method. Characterizations indicate that a homogenous dispersion of SnCoS nanoparticles on ordered structure mpg-C (248 m 2  g −1 average diameter 25 nm, providing more catalytic active sites and large contact regions for adsorption degradation pollutant. By taking advantage this feature, photocatalytic properties are evaluated systematically rhodamine B (RhB) methylene blue (MB) under visible light irradiation, photocatalyitc performance MCN/SnCoS -50 is much higher than pristine , MCN/CoS MCN/SnS . Moreover, heterojunction exhibits excellent photostability after four recycles. The enhanced photo-induced oxidation reduction activity can be attributed to not only high surface area composite, but also formation n-n type heterojunction. incorporation sulfides into decrease band gap, alter CB VB potential, enhance photoinduced interfacial charge transfer, therefore increase separation efficiency during reaction.