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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Graphene quantum dot sensitized leaf-like InVO4/BiVO4 nanostructure: a novel ternary heterostructured QD-RGO/InVO4/BiVO4 composite with enhanced visible-light photocatalytic activity
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Graphene quantum dot sensitized leaf-like InVO4/BiVO4 nanostructure: a novel ternary heterostructured QD-RGO/InVO4/BiVO4 composite with enhanced visible-light photocatalytic activity

机译：石墨烯量子点敏化的叶片状InVO4 / BiVO4纳米结构：新型三元异质结构QD-RGO / InVO4 / BiVO4复合材料，具有增强的可见光光催化活性

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摘要

Leaf-like InVO4/BiVO4 nanostructures with sizes of 2-5 mu m were synthesized by a simple hydrothermal method. Graphene quantum dots (QD-RGO) were then deposited onto the surfaces of the leaf-like InVO4/BiVO4 crystals through a facile deposition-precipitation technique. Under visible light irradiation (lambda > 420 nm), the QD-RGO/InVO4/BiVO4 photocatalyst degraded rhodamine B (Rh B) efficiently and displayed a much higher photocatalytic activity than pure BiVO4, InVO4, RGO/InVO4, RGO/BiVO4 or an InVO4/BiVO4 hybrid. The InVO4/BiVO4 photocatalyst with 3 wt% of QD-RGO exhibited the highest photocatalytic efficiency. The quenching effects of different scavengers demonstrated that O(2)(center dot-)played a major role in Rh B degradation. It was elucidated that the excellent photocatalytic activity of QD-RGO/InVO4/BiVO4 for the degradation of Rh B under visible light (lambda > 420 nm) can be ascribed to the extended absorption in the visible light region resulting from the QD-RGO loading, the high specific surface area, and the efficient separation of photogenerated electrons and holes through the QD-RGO/InVO4/BiVO4 heterostructure.
机译：通过简单的水热法合成了大小为2-5微米的叶状InVO4 / BiVO4纳米结构。然后通过简便的沉积沉淀技术将石墨烯量子点（QD-RGO）沉积到叶状InVO4 / BiVO4晶体的表面上。在可见光照射下（λ> 420 nm），QD-RGO / InVO4 / BiVO4光催化剂可有效降解罗丹明B（Rh B），并显示出比纯BiVO4，InVO4，RGO / InVO4，RGO / BiVO4或纯净的高得多的光催化活性。 InVO4 / BiVO4混合体。具有3重量％的QD-RGO的InVO 4 / BiVO 4光催化剂表现出最高的光催化效率。不同清除剂的淬灭效果表明，O（2）（中心点）在Rh B降解中起主要作用。阐明了QD-RGO / InVO4 / BiVO4对可见光（λ> 420 nm）下Rh B降解的优异光催化活性可以归因于QD-RGO负载导致的可见光区域的扩展吸收，高比表面积以及通过QD-RGO / InVO4 / BiVO4异质结构有效分离光生电子和空穴。

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