In-situ synthesis of highly efficient visible light driven stannic oxide/graphitic carbon nitride heterostructured photocatalysts.
In-situ synthesis of highly efficient visible light driven stannic oxide/graphitic carbon nitride heterostructured photocatalysts.
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DOI：
10.1016/j.jcis.2016.07.009
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发表时间：
2016-10
影响因子：
9.9
通讯作者：
Binglin Tao;Zifeng Yan
中科院分区：
文献类型：
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作者：
Binglin Tao;Zifeng Yan
采用简单的原位溶剂热法制备了新型高效的可见光驱动氧化锡/石墨氮化碳异质结构光催化剂。表征结果表明，SnO2纳米颗粒与g- c3n4基体之间存在强相互作用，形成了SnO2/g- c3n4异质结。合成的SnO2/g- c3n4复合材料在水溶液中光降解罗丹明B的效率提高，其表观速率常数比商用TiO2（Degussa P25）高6.5倍。sno2与g-C3N4之间的协同作用增强了光催化活性，使界面电荷有效转移，延长了电荷-空穴分离时间。经过6次循环后，SnO2/g- c3n4复合光催化剂具有优异的耐久性和稳定性，并提出了可能的光催化机理。本研究强调了二维g- c3n4基复合光催化剂在废水处理和环境修复领域的应用前景。
Novel and efficient visible-light-driven stannic oxide/graphitic carbon nitride heterostructured photocatalysts are prepared via a simple in-situ solvothermal method. Characterization results demonstrate that there exist strong interactions between SnO2nanoparticles and g-C3N4matrix, which indicates the formation of SnO2/g-C3N4heterojunction. The as-synthesized SnO2/g-C3N4composite exhibits improved efficiency for photodegradation of rhodamine B in aqueous solutions, with an apparent rate constant 6.5 times higher than that of commercial TiO2(Degussa P25). The enhanced photocatalytic activity is attributed to synergistic effect between SnO2and g-C3N4, resulting in effective interfacial charge transfer and prolonged charge-hole separation time. Moreover, SnO2/g-C3N4composite photocatalysts possess excellent durability and stability after 6 recycling runs, and a possible photocatalytic mechanism is also proposed. This research highlights the promising applications of two dimensional g-C3N4based composite photocatalysts in the field of waste water disposal and environmental remediation.