Construction of Novel Z-Scheme N-CQDs/Sn3O4 Heterojunction for Excellent Photocatalytic Degradation of Organic Pollutant

摘要: The construction of heterojunction can improve the transfer and separation efficiency photogenerated electron-hole pairs, which is conducive to photocatalytic removal pollutant. In this work, a novel Z-scheme N-CQDs (Nitrogen-doped carbon quantum dots)/Sn3O4 was synthesized by facile hydrothermal method. were evenly dispersed on surface Sn3O4, helpful for formation heterostructured interface between Sn3O4. As-prepared N-CQDs/Sn3O4 heterojunctions exhibited superior visible light activity pure Sn3O4 degradation methyl orange (MO). Especially, 1.25% sample displayed optimal with 78% MO under illumination 80 min. improvement behavior could be mainly attributed heterostructure interfaces, not only increases photoinduced charges but also reserves high energy electrons holes, as well higher specific area. Active species trapping experiments demonstrated that superoxide radical holes are important active during process. This work provides insight into design synthesis Sn3O4-based organic pollutants.