Enhanced core-shell CeO2:Er,Yb@W18O49 heterojunction H2 generation by multiband emissions of Er ions

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

doi:10.1088/1361-6528/ab6747

Enhanced core-shell CeO₂:Er,Yb@W₁₈O₄₉ heterojunction H₂ generation by multiband emissions of Er ions

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

Authors

Yang Yang¹, Yan Cong, Baosheng Cao, Yu Xiao, Jingyu Shang, Yao Tong, Huimin Zhang, Yang Liu, Bin Dong, Jia-Hua Zhang

Affiliation

¹ 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.

PMID: 31899897
DOI: 10.1088/1361-6528/ab6747

Abstract

The core-shell CeO₂:Er,Yb@W₁₈O₄₉ heterojunction is successfully synthesized via the facile solvothermal method. The octahedral CeO₂:Er,Yb nanocrystal's core exhibits green (²H_11/2, ⁴S_3/2 → ⁴I_15/2), red (⁴F_9/2 → ⁴I_15/2) and NIR (⁴I_11/2 → ⁴I_15/2 and ⁴I_13/2 → ⁴I_15/2) emission under 980 nm laser diode excitation, and the multiband emissions are absorbed by the W₁₈O₄₉ nanowire's shell, re-exciting its higher energy localized surface plasmon resonances (LSPR). With the excitation of 980 nm, the photocatalytic property of CeO₂:Er,Yb@W₁₈O₄₉ for hydrogen (H₂) evolution from ammonia borane (BH₃NH₃), a three-fold increase compared to W₁₈O₄₉, is researched. The application of natural sunlight for the production of H₂ is studied, and an obvious H₂ production enhancement compared to the use of W₁₈O₄₉ (two-fold) is also observed. This remarkable enhancement in the catalytic activity of CeO₂:Er,Yb@W₁₈O₄₉ heterostructures is ascribed to the re-excitation of LSPR by multiband emissions of CeO₂:Er,Yb.