Abstract Plasmonic photocatalysis has encouraged quick improvement in improving the photocatalytic activity under visible light illumination, augmenting the potential for utilizing light for ecological and energy application. Plasmonic photocatalysis utilizes noble metal nanoparticles embedded with semiconductor nanocatalyst and utilizes Schottky junction and surface plasmonic resonance (SPR). In this particular work, a novel photocatalyst Ag-AgX-ZnO-rGO (X = Cl & Br) was synthesized making use of a hydrothermal-photoreduction method by means of zinc nitrate, cetyltrimethylammonium bromide (CTAB), cetyltrimethylammonium chloride (CTAC), AgNO3, and also graphene oxide (GO), during the course of which the crystallization of ZnO, Ag nanoparticles generation, as well as reduction of GO to rGO were attained at the same time. Main essential benefits in plasmonic photocatalyst (Ag-AgX-ZnO-rGO) over a two-component (ZnO-rGO) system and detailed processes for improved photocatalytic activity in terms of band-edge positions have been proposed. The degradation mechanism of methylene orange (MO) was discussed based on the intermediate products detected by mass spectrometry analysis. Physical mechanisms of plasmonic enhancement for photocatalytic degradation of MO in terms of the band-bending and surface plasmon resonance have been discussed. In addition, comparisons are made between photo-oxidation and photo-reduction effectiveness in Ag-AgBr-ZnO-rGO and Ag-AgCl-ZnO-rGO plasmonic photocatalyst on the foundation of charge polarization.

中文翻译：

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表面等离子体共振和肖特基结在 Ag-AgX-ZnO-rGO（X=Cl & Br）纳米复合材料中的协同作用，用于增强可见光驱动的光催化

摘要 等离子体光催化促进了在可见光照射下光催化活性的快速提高，增加了利用光进行生态和能源应用的潜力。等离子体光催化利用嵌入半导体纳米催化剂的贵金属纳米粒子，并利用肖特基结和表面等离子体共振 (SPR)。在这项特殊的工作中，利用硝酸锌、十六烷基三甲基溴化铵 (CTAB)、十六烷基三甲基氯化铵 (CTAC)、水热光还原法合成了一种新型光催化剂 Ag-AgX-ZnO-rGO (X = Cl & Br)， AgNO3 以及氧化石墨烯 (GO)，在此过程中同时实现了 ZnO 的结晶、Ag 纳米颗粒的生成以及 GO 还原为 rGO。已经提出了等离子体光催化剂（Ag-AgX-ZnO-rGO）相对于双组分（ZnO-rGO）系统的主要基本优点，以及在带边位置方面提高光催化活性的详细过程。基于质谱分析检测到的中间产物，讨论了亚甲基橙（MO）的降解机理。已经讨论了在能带弯曲和表面等离子体共振方面等离子体增强光催化降解 MO 的物理机制。此外，在电荷极化的基础上，对Ag-AgBr-ZnO-rGO和Ag-AgCl-ZnO-rGO等离子体光催化剂的光氧化和光还原效率进行了比较。