Hydrothermal Cation Exchange Enabled Gradual Evolution of Au@ZnS-AgAuS Yolk-Shell Nanocrystals and Their Visible Light Photocatalytic Applications.

Hydrothermal Cation Exchange Enabled Gradual Evolution of Au@ZnS-AgAuS Yolk-Shell Nanocrystals and Their Visible Light Photocatalytic Applications.
复制标题

水热阳离子交换使Au@ZnS-AgAuS卵黄壳纳米晶的逐步演化及其可见光光催化应用

DOI:
10.1002/advs.201700376
复制
发表时间:
2018-01
期刊:
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
影响因子:
--
通讯作者:
Zhang J
Zhang J
中科院分区:
其他
文献类型:
--
作者:
Feng J;Liu J;Cheng X;Liu J;Xu M;Zhang J

文献摘要

参考文献

被引文献

相似文献

具有贵金属核和程序化半导体壳组成的蛋黄-壳混合纳米颗粒可以表现出协同效应和可调的催化性能。本工作采用水热阳离子交换法合成了具有良好孔隙尺寸、晶界结构的ZnS-AgAuS壳层和原位生成的Au助催化剂的Au@ZnS-AgAuS蛋黄壳纳米晶(Y-S NC)。从新颖的无腔Au@AgAuS核-壳NC开始,通过与Zn 2+的水溶液阳离子交换反应,可以成功地实现与所产生的Au@ZnS-AgAuS Y-S NC的逐步演化。这种前所未有的演变可以合理地解释为阳离子交换引发的化学蚀刻的Au核心,随后通过壳层扩散到AgAuS,然后ZnS。水热处理提供了最佳的氧化还原环境,壳层中的Au离子被部分还原为表面的Au纳米粒子。其紫外-可见吸收光谱和可见光催化性能,包括光降解性能的改善和光催化析氢活性的提高,显示了其潜在的应用前景。这种新的一锅法获得不同的异质界面,以更好地协同光诱导电子/空穴分离,可以预期用于更多种类的光催化有机合成。
Yolk–shell hybrid nanoparticles with noble metal core and programmed semiconductor shell composition may exhibit synergistic effects and tunable catalytic properties. In this work, the hydrothermal cation exchange synthesis of Au@ZnS–AgAuS yolk–shell nanocrystals (Y–S NCs) with well‐fabricated void size, grain‐boundary‐architectured ZnS–AgAuS shell and in situ generated Au cocatalyst are demonstrated. Starting from the novel cavity‐free Au@AgAuS core‐shell NCs, via aqueous cation exchange reaction with Zn2+, the gradual evolution with produced Au@ZnS–AgAuS Y–S NCs can be achieved successfully. This unprecedented evolution can be reasonably explained by cation exchange initialized chemical etching of Au core, followed by the diffusion through the shell to be AgAuS and then ZnS. By hydrothermal treatment provided optimal redox environment, Au ions in shell were partially reduced to be Au NCs on the surface. The UV–vis absorption spectra evolution and visible light photocatalytic performances, including improved photodegradation behavior and photocatalytic hydrogen evolution activity, have demonstrated their potential applications. This new one‐pot way to get diverse heterointerfaces for better photoinduced electron/hole separation synergistically can be anticipated for more kinds of photocatalytic organic synthesis.
DOI: 10.1002/adfm.201101900
发表时间: 2012-02-08
影响因子: 19
作者:
Liu, Jian;Yang, Heng Quan;Qiao, Shi Zhang
通讯作者: Qiao, Shi Zhang
DOI: 10.1021/ja072191c
发表时间: 2007-07-11
影响因子: 15
作者:
Li, Hexing;Bian, Zhenfeng;Lu, Yunfeng
通讯作者: Lu, Yunfeng
DOI: 10.1002/advs.201600216
发表时间: 2017-01
期刊: Advanced science (Weinheim, Baden-Wurttemberg, Germany)
影响因子: --
作者:
Bai S;Wang L;Li Z;Xiong Y
通讯作者: Xiong Y
DOI: 10.1038/nmat3685
发表时间: 2013-09-01
期刊: NATURE MATERIALS
影响因子: 41.2
作者:
Mark, Andrew G.;Gibbs, John G.;Fischer, Peer
通讯作者: Fischer, Peer
DOI: 10.1039/c2ta00721e
发表时间: 2013-01-01
影响因子: 11.9
作者:
Meir, Noga;Plante, Ilan Jen-La;Mokari, Taleb
通讯作者: Mokari, Taleb