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Graphene quantum dots-decorated ZnS nanobelts with highly efficient photocatalytic performances

机译：石墨烯量子点装饰ZnS纳米座，具有高效的光催化性能

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Hybrid nanostructures combining inorganic materials and graphene have shown great potential for the environmentally friendly treatment of effluents. Herein, graphene quantum dots (GQDs)-decorated ZnS nanobelts have been synthesized via a facile hydrothermal method. The electrostatic attraction of two materials and the thermal reduction of graphene are the main driving forces to fabricate well-defined composite nanostructures. GQDs in GQD/ZnS nanocomposites have been found to exist discretely and uniformly on the surfaces of ZnS nanobelts. The photocatalytic activity of GQD/ZnS nanocomposites has been found to be highest at a GQD/ZnS mass ratio of 8 × 10 ~(?4) . The photocatalytic rate constant (0.0046 min ~(?1) ) of GQD/ZnS nanocomposites having the optimized GQD content in the photodegradation reaction of rhodamine B has been found to be 14 times higher than that of commercially available ZnS powder. Decorated GQDs introduce an additional visible-light response and serve as electron collectors and transporters to block electron–hole recombination efficiently, enhancing the photocatalytic performances of ZnS nanobelts immensely.
机译：结合无机材料和石墨烯组合的杂种纳米结构表明了流出物的环保治疗潜力。这里，已经通过容易水热法合成了石墨烯量子点（GQDS） - 覆盖的ZnS纳米胶。两种材料的静电吸引和石墨烯的热还原是制造明确定义的复合纳米结构的主要驱动力。已经发现GQD / ZnS纳米复合材料中的GQDS在ZnS纳米座的表面上是离散和均匀的。已经发现GQD / ZnS纳米复合材料的光催化活性以8×10〜（α4）的GQD / ZnS质量比为最高。已发现在罗丹明B的光降解反应中具有优化的GQD含量的GQD / ZnS纳米复合材料的光催化速率常数（0.0046min〜（α1））比市售ZnS粉末高14倍。装饰GQD引入了额外的可见光响应，并用作电子收集器和运输扣，以便有效地阻止电子空穴重组，增强ZnS纳米纤维的光催化性能。

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