Facile synthesis of Ag@CeO2 core-shell plasmonic photocatalysts with enhanced visible-light photocatalytic performance
Facile synthesis of Ag@CeO2 core-shell plasmonic photocatalysts with enhanced visible-light photocatalytic performance
复制标题
轻松合成具有增强可见光催化性能的Ag@CeO2核壳等离子体光催化剂
DOI：
10.1016/j.jhazmat.2015.06.062
复制
发表时间：
2015-12-30
影响因子：
13.6
通讯作者：
Xin, Yongji
中科院分区：
文献类型：
--
作者：
Wu, Linen;Fang, Siman;Xin, Yongji
Novel Ag@CeO2 core-shell nanostructures with well-controlled shape and shell thickness were successfully synthesized via a green and facile template-free approach in aqueous solution. As-prepared samples were characterized by high-resolution transmission electron microscopy (HRTEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), ultraviolet-visible diffuse reflection spectroscopy (DRS), electron spin resonance (ESR) and photoluminescence spectroscopy (PL). The structures with different core shapes and controllable shell thickness exhibited unique optical properties. It is found that the nanoscale Ag@CeO2 core-shell photocatalysts exhibit significantly enhanced photocatalytic activities in the O-2 evolution and MB dye degradation compared to pure CeO2 nanoparticals. The enhancement in photocatalytic activities can be ascribed to the localized surface plasmon resonance (SPR) of Ag cores. Moreover, larger active interfacial areas and contact between metal/semiconductor in the core-shell structure facilitate transfer of charge carriers and prolong lifetime of photogenerated electron-hole pairs. It is expected that the Ag@CeO2 core-shell structure may have great potential in a wider range of light-harvesting applications. (C) 2015 Elsevier B.V. All rights reserved.
