High-performance silver nanoparticles coupled with monolayer hydrated tungsten oxide nanosheets: The structural effects in photocatalytic oxidation of cyclohexane
High-performance silver nanoparticles coupled with monolayer hydrated tungsten oxide nanosheets: The structural effects in photocatalytic oxidation of cyclohexane
复制标题
高性能银纳米粒子与单层水合氧化钨纳米片耦合：环己烷光催化氧化的结构效应
DOI：
10.1016/j.jcis.2018.01.057
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发表时间：
2018
影响因子：
9.9
通讯作者：
Fang Yanxiong
中科院分区：
文献类型：
--
作者：
Xiao Yepeng;Liu Jincheng;Mai Jijin;Pan Chenqian;Cai Xiaolan;Fang Yanxiong
研究了银纳米粒子（Ag NPs）与氧化钨（WO 3）纳米晶的耦合对环己烷（CyH）选择性氧化反应的光催化性能。单层水合WO 3纳米片-银纳米颗粒复合物（WO 3 NSs-Ag NPs）的光催化活性是WO 3纳米立方体-银纳米颗粒复合物（WO 3 NCs-Ag NPs）的1.3倍。在室温太阳光照射下，通过WO 3 NSs-Ag纳米颗粒的光催化剂实现了40.2%的最高环己烷转化率和97.0%的环己醇和环己酮（KA油）选择性。WO 3 NSs-Ag纳米粒子在10次循环后显示出良好的光催化稳定性，催化活性没有明显下降。WO 3 NSs-Ag纳米粒子光催化氧化环己烷的活性提高主要是由于Ag纳米粒子表面等离子体共振（SPR）效应增强光吸收，促进了高活性羟基自由基（dotOH）的产生，以及WO 3单层结构表面有效的电荷转移。本研究的WO 3 NSs-Ag纳米粒子的设计和结构分析为进一步开发高性能光催化剂提供了一种新的途径。
The photocatalytic properties of silver nanoparticles (Ag NPs) coupled with tungsten oxide (WO3) nanocrystals are investigated to understand structural effects of the WO3nanocrystals in selective oxidation of cyclohexane (CyH). The photocatalytic activity of monolayer hydrated WO3nanosheet - Ag nanoparticle composites (WO3NSs-Ag NPs) is 1.3 times higher than that of WO3nanocube - Ag nanoparticle composites (WO3NCs-Ag NPs). The highest cyclohexane conversion of 40.2% with cyclohexanol and cylohexanone (KA oil) selectivity of 97.0% is achieved by the photocatalyst of WO3NSs-Ag NPs under solar-light irradiation at room temperature. The WO3NSs-Ag NPs shows good photocatalytic stability without evident decline of catalytic activity after ten cycles. The improved photocatalytic activity in the oxidation of cyclohexane by WO3NSs-Ag NPs is mainly due to the facilitated generation of high-reactive hydroxyl radical (radical dotOH), which is caused by the enhanced light absorption by surface plasmon resonance (SPR) effect of Ag NPs, and the effective charge transfer on the surface of WO3monolayer structure. The design and structural analysis of the WO3NSs-Ag NPs in this research may provide a novel approach for the further development of high-performance photocatalyst.