Fabrication of a ternary plasmonic photocatalyst CQDs/Ag/Ag2O to harness charge flow for photocatalytic elimination of pollutants
Fabrication of a ternary plasmonic photocatalyst CQDs/Ag/Ag2O to harness charge flow for photocatalytic elimination of pollutants
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DOI：
10.1016/j.apcatb.2016.03.056
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发表时间：
2016-09-05
影响因子：
22.1
通讯作者：
Shi, Weidong
中科院分区：
文献类型：
--
作者：
Chen, Jibin;Che, Huinan;Shi, Weidong
光催化技术为日益增长的环境和能源问题提供了一种直接有效的策略。在这项研究中，提出了一种实用的策略，以促进分离的e-h对，并提高在半导体中的光稳定性，通过使用肖特基结的贵金属-CQDs-半导体堆叠结构（CQDs，碳量子点）。不同的表征技术被用来研究合成样品的结构和光学性质。由于CQDs的光诱导电子转移和上转换发光特性，CQDs/Ag/Ag 2 O三元光催化剂在全光谱范围内表现出优异的光催化活性和操作稳定性。此外，Ag纳米粒子负载在Ag 2 O八面体晶体包裹的CQDs层上，通过界面修饰和电荷转移通道设计的协同催化作用，获得了最高的光催化活性。我们的工作为当前环境污染，能源问题和其他相关领域的实用光催化剂的开发提供了宝贵的方法。(C)2016爱思唯尔B. V.保留所有权利。
The photocatalytic technology provides a straightforward and effective strategy for the ever-increasing environmental and energy concerns. In this study, a practical strategy is proposed to facilitate the separation of e-h pairs and enhance the photostability in a semiconductor by the use of a Schottky junction in a noble metal-CQDs-semiconductor stack structure (CQDs, carbon quantum dots). Different characterization techniques were used to investigate the structural and optical properties of the synthesized samples. Importantly, due to the photoinduced electron transfer and upconverison luminescence properties of CQDs, the CQDs/Ag/Ag2O ternary photocatalysts exhibit excellent photocatalytic activity and operational stability in full-spectrum. Furthermore, Ag nanoparticles supported on an ultrathin CQDs layer encapsulating Ag2O octahedral crystal lead to the highest photocatalytic activity by the synergetic catalytic effect of interfacial modification and vectorial charge-transfer channel design. Our works provide an invaluable methodology for the development of practical photocatalysts in current environmental pollution, energy issues and other related areas. (C) 2016 Elsevier B.V. All rights reserved.