S-doped g-C۳N۴/SnO۲ nanocomposite applied for pollutantdegraradion under the visible light radiarion

In this work, SnO۲/sulfur-doped graphitic carbon nitride (CNS) was fabricated in situ. The phase structureand morphology of composite indicated that the perfect crystalline structure and the stacking degree of CNSphase were disrupted during the formation of SnO۲ particles, so that specific surface area of composite wasenhanced about ۲.۸ times compared with that of pure CNS photocatalyst. The SnO۲/CNS compositephotocatalyst showed a high photocatalytic efficiency for degrading methylene blue (MB) under visible lightirradiation among the individual CNS and SnO۲ photocatalysts. The improved photoactivity could be relatedto introducing S dopant in CNS backbone which led to increasing the visible light absorption. Also, due toloading the SnO۲ nanoparticles, heterojunctions were formed between SnO۲ and CNS which facilitated theeffective charge transfer through interfacial interactions between both components. The heterojunctionprepared by the in situ strategy showed excellent stability for the photocatalytic activity under optimizedconditions.

کلیدواژه ها:

: Photocatalyst ، Nanocomposite ، Visible light irradiation ، Sulfur doping ، Heterojunction