Fabrication of BiVO4 nanoplates with active facets on graphene sheets for visible-light photocatalyst
Fabrication of BiVO4 nanoplates with active facets on graphene sheets for visible-light photocatalyst
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DOI：
10.1016/j.carbon.2015.07.042
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发表时间：
2015-11-01
期刊：
影响因子：
10.9
通讯作者：
Zhang, Di
中科院分区：
文献类型：
--
作者：
Li, Yao;Sun, Zhihua;Zhang, Di
BiVO4作为一种有前景的可见光光催化剂，广泛应用于有机污染物的降解、有机物的选择性合成以及从水中生产O-2等领域。形貌设计和与石墨烯的耦合是提高其光催化效率的有效方法。在此，开发了一种新颖的水热方法，用于在还原氧化石墨烯片（RGO）上制造具有暴露的{010}面的BiVO4纳米板。在此过程中，使用的乙醇胺充当 pH 调节剂，以激发 BiVO4 的 {010} 平面以及交联剂的暴露。结果获得了复合材料的气凝胶状结构。当用作光催化剂时，与纯 BiVO4 相比，所得复合材料在从水中放出 O-2 和苯酚氧化方面表现出增强的性能。这种增强的性能可以通过具有暴露的{010}面的独特纳米板BiVO4的协同效应、由于添加石墨烯而改善的电子电导率以及更重要的是BiVO4和RGO之间的界面相互作用来解释，该相互作用有效地减少了光生电荷的复合损失。 (C) 2015 Elsevier Ltd. 保留所有权利。
As a promising visible-light photocatalyst, BiVO4 is widely used for degradation of organic pollutants, selective synthesis of organics and O-2 production from water. Morphology design and coupling with graphene are effective methods to enhance its photocatalytic efficiency. Herein, a novel hydrothermal method was developed for the fabrication of BiVO4 nanoplates with exposed {010} facets onto reduced graphene oxide sheets (RGO). During the process, ethanolamine used acts as a pH regulator to intrigue the exposure of {010} planes of BiVO4 as well as a crosslinking agent. As a result an aerogel-like structure of the composite was obtained. When used as a photocatalyst, the resultant composite showed an enhanced performance in both the O-2 evolution from water and the oxidation of phenol in comparison with pure BiVO4. This enhanced performance may be explained in terms of the synergetic effects of the unique nanoplate BiVO4 with exposed {010} planes, the improved electronic conductivity due to the addition of graphene, and more importantly, the interface interaction between the BiVO4 and RGO which reduces the recombination loss of photo-generated charges effectively. (C) 2015 Elsevier Ltd. All rights reserved.