Transfer Charge and Energy of Ag@CdSe QDs-rGO Core-Shell Plasmonic Photocatalyst for Enhanced Visible Light Photocatalytic Activity
Transfer Charge and Energy of Ag@CdSe QDs-rGO Core-Shell Plasmonic Photocatalyst for Enhanced Visible Light Photocatalytic Activity
复制标题
Ag@CdSe QDs-rGO核壳等离子体光催化剂的电荷和能量转移增强可见光光催化活性
DOI：
10.1021/acsami.5b06997
复制
发表时间：
2015
影响因子：
9.5
通讯作者：
Yan Yongsheng
中科院分区：
文献类型：
--
作者：
Zhou Mingjun;Li Jinze;Ye Zhefei;Ma Changchang;Wang Huiqin;Huo Pengwei;Shi Weidong;Yan Yongsheng
半导体型的等离子体异质纳米结构显示出非凡的光催化效率，由在Ag@CdSe-rGO混合三元复合材料中操作的等离子体能量引起。采用一步水热法制备了纳米级等离子体光催化剂，在此过程中Ag@CdSe核壳纳米粒子的原位成核和GO的还原同时发生。三种不同的作用Ag核心和所产生的协同性能的引入rGO的交界处共同增强了CdSe的光学性能。等离子体Ag的局域等离子体共振（LPR）效应有助于通过电子和共振能量转移分离光生的e-/h+对。电化学研究进一步证实了光生电子/H+对的增强分离。从Ag@CdSe-rGO和Ag/CdSe-rGO的比较光催化实验，Ag@CdSe-rGO纳米结构中的Ag核的等离子体效应用于延长可见光下的电荷分离超过常见的附接三聚体。
Plasmonic heteronanostructures in semiconductor type display extraordinary photocatalytic efficiency induced by the plasmonic energy that operates in the Ag@CdSe-rGO hybrid ternary composites. The obtained plasmonic photocatalysts in nanoscale were fabricated by using a one-step hydrothermal method, during which the in situ nucleation of Ag@CdSe core–shell nanoparticles and the reduction of GO to rGO occurred simultaneously. Three different roles of Ag core and the junction of synergistic properties arising from the introduced rGO jointly enhanced the optical properties of CdSe. Localized plasmon resonance (LPR) effects of plasmonic Ag contribute to the separation of photogenerated e–/h+pairs via the electrons and resonant energy transfer. Electrochemical investigations have further confirmed the enhanced separation of the photogenerated e–/h+pairs. From comparative photocatalytic experiments of Ag@CdSe-rGO and Ag/CdSe-rGO, the plasmonic effect of the Ag core in the Ag@CdSe-rGO nanostructure serves to prolong the charge separation under visible light beyond common attached trimers.