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首页> 外文期刊>RSC Advances >Highly efficient visible-light-driven plasmonic photocatalysts based on graphene oxide mediated hybridization of graphite and Ag/AgBr
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Highly efficient visible-light-driven plasmonic photocatalysts based on graphene oxide mediated hybridization of graphite and Ag/AgBr

机译：基于氧化石墨烯介导的石墨与Ag / AgBr杂化的高效可见光驱动等离激元光催化剂

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Graphite (Gr)-based composite materials have been attracting great interest from the scientific and engineering communities. While tremendous progress has been achieved in this field, it still remains a formidable challenge to hybridize pristine Gr with other components under ambient conditions without breaking the π-conjugated system of Gr. Herein, we report that Gr could be facilely hybridized with visible-light-driven plasmonic photocatalyst Ag/AgBr with the assistance of graphene oxide (GO) nanosheets under ambient conditions. We demonstrate that without the use of GO, Gr could not be well hybridized with Ag/AgBr, while a good hybrid Gr/GO/Ag/AgBr could be produced when GO nanosheets are introduced into the system. Our results show that compared to Ag/AgBr, GO/Ag/AgBr and Gr/Ag/AgBr species, thus-fabricated Gr/GO/Ag/AgBr hybrids could display substantially enhanced catalytic activity towards the photobleaching of methyl orange under visible-light irradiation. It is disclosed that the good hybridization between Gr and Ag/AgBr, which is mediated by GO, and the facilitated separation of photogenerated electrons and holes, which is promoted both by GO and Gr, contribute much to the boosted catalytic performances. Considering the excellent hybridization capability of GO, the exceptional electronic characteristics, versatile multifunctionality and low-cost of Gr, our protocol might be applicable not only to the Ag/AgBr-based plasmonic photocatalysts but also to a wide variety of other functional materials, wherein Gr/GO-based advanced materials of desired and reinforced functions or properties might be inaugurated.
机译：石墨（Gr）基复合材料引起了科学和工程界的极大兴趣。尽管在该领域已经取得了巨大的进步，但是在环境条件下使原始的Gr与其他成分杂交而不破坏Gr的π共轭体系仍然是一个艰巨的挑战。在本文中，我们报道在环境条件下，借助石墨烯氧化物（GO）纳米片，可以将Gr与可见光驱动的等离激元光催化剂Ag / AgBr轻松杂交。我们证明，如果不使用GO，则Gr不能与Ag / AgBr很好地杂交，而当将GO纳米片引入系统时，可以产生良好的Gr / GO / Ag / AgBr杂化。我们的结果表明，与Ag / AgBr，GO / Ag / AgBr和Gr / Ag / AgBr物种相比，如此制造的Gr / GO / Ag / AgBr杂种在可见光下可显着增强对甲基橙光漂白的催化活性。辐射。公开了由GO介导的Gr和Ag / AgBr之间的良好杂交，以及由GO和Gr两者促进的光生电子和空穴的促进分离，对提高催化性能有很大贡献。考虑到GO的出色杂交能力，出色的电子特性，通用的多功能性和Gr的低成本，我们的协议不仅适用于基于Ag / AgBr的等离激元光催化剂，而且还适用于多种其他功能材料，其中可以启用具有所需功能和特性的基于Gr / GO的先进材料。

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