Site-selected synthesis of novel Ag@AgCl nanoframes with efficient visible light induced photocatalytic activity
Site-selected synthesis of novel Ag@AgCl nanoframes with efficient visible light induced photocatalytic activity
复制标题
具有高效可见光诱导光催化活性的新型Ag@AgCl纳米框架的定点合成
DOI：
10.1039/c4ta01941e
复制
发表时间：
2014-01-01
影响因子：
11.9
通讯作者：
Zhang, Junlong
中科院分区：
文献类型：
--
作者：
Han, Changcun;Ge, Lei;Zhang, Junlong
开发了一种新的、简便的合成Ag@AgCl光催化剂的方法。AgCl纳米框架最初是通过择位生长过程制备的。光照射后，成功地合成了银纳米粒子在表面均匀分布的Ag@AgCl复合纳米框架。用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、紫外-可见漫反射光谱(DRS)、X射线光电子能谱(XPS)、电子自旋共振(ESR)和光致发光光谱(PL)对复合光催化剂的物理和光物理性能进行了表征。与纯AgCl和Ag@AgCl立方结构相比，Ag@AgCl纳米框架在可见光照射下表现出更好的光催化活性和光生载流子分离效率。此外，Ag@AgCl纳米框架在5次循环后仍能保持光催化活性。提出了Ag@AgCl纳米框架结构的一种可能机制。Ag@AgCl光催化活性的提高可以归因于Ag的表面等离子体共振(SPR)效应和AgCl的杂化效应。
A novel and facile synthetic route toward Ag@AgCl nanoframe photocatalysts is developed. The AgCl nanoframes were initially prepared via a site-selected growth process. After light irradiation, the Ag@AgCl composite nanoframes with uniform distribution of Ag nanoparticles on the surface were successfully synthesized. The physical and photophysical properties of the Ag@AgCl composite photocatalysts were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), ultraviolet-visible diffuse reflection spectroscopy (DRS), X-ray photoelectron spectroscopy (XPS), electron spin resonance (ESR) and photoluminescence spectroscopy (PL). The Ag@AgCl nanoframes showed superior photocatalytic activity and photo-generated charge carrier separation efficiency under visible light irradiation, when compared with pure AgCl and Ag@AgCl cubic structures. Furthermore, the Ag@AgCl nanoframes can maintain photocatalytic activity after 5 cycles. A possible mechanism for Ag@AgCl nanoframe structures is proposed. The enhanced photocatalytic activity of Ag@AgCl nanoframe structures can be attributed to the surface plasmon resonance (SPR) effect from Ag and the hybrid effect from AgCl.