Ag/AgCl nanoparticles assembled on BiOCl/Bi12O17Cl2 nanosheets: Enhanced plasmonic visible light photocatalysis and in situ DRIFTS investigation

Ag/AgCl nanoparticles assembled on BiOCl/Bi12O17Cl2 nanosheets: Enhanced plasmonic visible light photocatalysis and in situ DRIFTS investigation
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Ag/AgCl 纳米粒子组装在 BiOCl/Bi12O17Cl2 纳米片上:增强等离子体可见光光催化和原位漂移研究

DOI:
10.1016/j.apsusc.2018.05.171
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发表时间:
2018-10
影响因子:
6.7
通讯作者:
Fan Dong
Fan Dong
中科院分区:
材料科学1区
文献类型:
--
作者:
Wendong Zhang;Xing'an Dong;Yi Liang;Yanjuan Sun;Fan Dong

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采用沉积-沉淀法在BiOCl/Bi 12 O 17 Cl 2纳米片表面成功地锚定了Ag/AgCl@BiOCl/Bi 12 O 17 Cl 2(Ag/AgCl@BOC)等离子体复合材料。采用XRD、XPS、SEM、TEM、UV-vis DRS、PL、光电流、EIS、BET-BJH、ESR等测试手段对样品的微观结构和物理化学性能进行了研究。此外,还利用原位漫反射红外光谱研究了NOx氧化过程中的吸附和光催化反应机理。优化后的1:2 Ag/AgCl@BOC复合材料不仅表现出优异的光催化性能(49.5%),而且在可见光照射下对室内空气中NO的去除表现出较高的光化学稳定性。根据DMPO-ESR自旋俘获谱,Ag/AgCl@BOC在可见光下产生的活性物种为自由基dotO 2 −和自由基dotOH。结果表明,Ag/AgCl纳米粒子的表面等离子体共振效应和有效的载体分离能力的协同作用导致了光催化效率的提高。本工作为设计高性能、稳定的铋基等离子体光催化剂提供了一种简便的方法。
The Ag/AgCl@BiOCl/Bi12O17Cl2(Ag/AgCl@BOC) plasmonic composites have been successfully synthesized by anchoring Ag/AgCl nanoparticles on the surfaces of BiOCl/Bi12O17Cl2nanosheets via a deposition-precipitation strategy at room temperature. The XRD, XPS, SME, TEM, UV–vis DRS, PL, Photocurrent, EIS, BET-BJH, and ESR were applied to explore the intrinsic microstructure and physicochemical properties. Furthermore, thein situdiffuse reflectance infrared Fourier transform spectroscopy is used to investigate the adsorption and photocatalytic reaction mechanism during the NOxoxidation process. The optimized 1:2 Ag/AgCl@BOC composites not only exhibited excellent photocatalytic performance (49.5%) but also displayed high photochemical stability for removal of NO at the indoor air level under visible-light irradiation. Based on the DMPO-ESR spin trapping, the active species generated from Ag/AgCl@BOC wereradical dotO2−radicals andradical dotOH radicals under visible light. The results demonstrate that the synergetic effect of surface plasmon resonance of the Ag/AgCl nanoparticles and the effective carrier separation ability result in the improvement of photocatalytic efficiency. The present work can provide a facile strategy to the design of high and stable performance bismuth-based plasmonic photocatalysts for environmental purification.
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