通过铒离子的多波段发射增强核壳结构CeO:Er,Yb@WO异质结中的氢生成。

Enhanced core-shell CeO:Er,Yb@WO heterojunction H generation by multiband emissions of Er ions.

作者信息

Yang Yang, Cong Yan, Cao Baosheng, Xiao Yu, Shang Jingyu, Tong Yao, Zhang Huimin, Liu Yang, Dong Bin, Zhang Jia-Hua

机构信息

State Key Laboratory of Luminescence and Applications, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, 3888, Eastern South Lake Road, Changchun 130033, People's Republic of China. University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China.

出版信息

Nanotechnology. 2020 Apr 17;31(16):165707. doi: 10.1088/1361-6528/ab6747. Epub 2020 Jan 3.

DOI:10.1088/1361-6528/ab6747

PMID:31899897

Abstract

The core-shell CeO:Er,Yb@WO heterojunction is successfully synthesized via the facile solvothermal method. The octahedral CeO:Er,Yb nanocrystal's core exhibits green (H, S → I), red (F → I) and NIR (I → I and I → I) emission under 980 nm laser diode excitation, and the multiband emissions are absorbed by the WO nanowire's shell, re-exciting its higher energy localized surface plasmon resonances (LSPR). With the excitation of 980 nm, the photocatalytic property of CeO:Er,Yb@WO for hydrogen (H) evolution from ammonia borane (BHNH), a three-fold increase compared to WO, is researched. The application of natural sunlight for the production of H is studied, and an obvious H production enhancement compared to the use of WO (two-fold) is also observed. This remarkable enhancement in the catalytic activity of CeO:Er,Yb@WO heterostructures is ascribed to the re-excitation of LSPR by multiband emissions of CeO:Er,Yb.

摘要

通过简便的溶剂热法成功合成了核壳结构的CeO:Er,Yb@WO异质结。八面体CeO:Er,Yb纳米晶体的核在980 nm激光二极管激发下呈现绿色（H，S→I）、红色（F→I）和近红外（I→I和I→I）发射，且多波段发射被WO纳米线的壳层吸收，从而重新激发其更高能量的局域表面等离子体共振（LSPR）。在980 nm激发下，研究了CeO:Er,Yb@WO对氨硼烷（BHNH）产氢（H）的光催化性能，与WO相比提高了三倍。研究了利用自然阳光产氢的情况，与使用WO相比（提高了两倍），也观察到明显的产氢增强。CeO:Er,Yb@WO异质结构催化活性的显著增强归因于CeO:Er,Yb的多波段发射对LSPR的重新激发。