Shanghai Key Laboratory of Green Chemistry and Chemical Processes, School of Chemistry and Molecular Engineering, East China Normal University , Shanghai 200062, China.
ACS Appl Mater Interfaces. 2018 Feb 7;10(5):4929-4936. doi: 10.1021/acsami.7b17046. Epub 2018 Jan 27.
Hybrid nanoparticles have intrinsic advantages to achieve better activity in photocatalysis compared to single-component materials, as it can synergistically combine functional components, which promote light absorption, charge transportation, surface reaction, and catalyst regeneration. Through functional modular assembly, a rational and stepwise approach has been developed to construct FeO-CdS-Au trimer nanoparticles and its derivatives as magnetically separable catalysts for photothermo-catalytic hydrogen evolution from water. In a typical step-by-step synthetic process, FeO-Ag dimers, FeO-AgS dimers, FeO-CdS dimers, and FeO-CdS-Au trimers were synthesized by seeding growth, sulfuration, ion exchange, and in situ reduction consequently. Following the same reaction route, a series of derivative trimer nanoparticles with alternative semiconductor and metal were obtained for water-reduction reaction. The experimental results show that the semiconductor acts as an active component for photocatalysis, the metal nanoparticle acts as a cocatalyst for enhancement of charge separation, and the FeO component helps in the convenient separation of catalysts in magnetic field and improves photocatalytic activity under near-infrared illumination due to photothermic effect.
杂化纳米粒子相比于单一成分材料在光催化中具有内在优势，因为它可以协同结合功能组件，从而促进光吸收、电荷输运、表面反应和催化剂再生。通过功能模块组装，开发了一种合理的逐步方法来构建 FeO-CdS-Au 三聚体纳米粒子及其衍生物，作为用于从水中光热协同催化析氢的可磁化分离催化剂。在典型的逐步合成过程中，通过种子生长、硫化、离子交换和原位还原，分别合成了 FeO-Ag 二聚体、FeO-AgS 二聚体、FeO-CdS 二聚体和 FeO-CdS-Au 三聚体。按照相同的反应路线，获得了一系列具有替代半导体和金属的衍生三聚体纳米粒子，用于水还原反应。实验结果表明，半导体作为光催化的活性组件，金属纳米颗粒作为增强电荷分离的助催化剂，FeO 组分有助于在磁场中方便地分离催化剂，并由于光热效应提高了近红外光照下的光催化活性。
