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Realizing High Photocatalytic Performance of NaBiS 2 Nanopowders via the Introduction of Rare‐Earth Elements
Author(s) -
Guo Jun,
Zhong ChongYuan,
Ge ZhenHua,
Feng Jing
Publication year - 2019
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201900061
Subject(s) - photocatalysis , rhodamine b , materials science , degradation (telecommunications) , absorption (acoustics) , ion , photochemistry , chemical engineering , nanotechnology , catalysis , chemistry , computer science , telecommunications , biochemistry , organic chemistry , engineering , composite material
Rare earth (RE) elements (RE = Sm, Nd) added NaBiS 2 nanoparticles are successfully synthesized by a facile one pot growth method. The photocatalytic performance of all samples are evaluated by the degradation of Rhodamine B (RhB) under the visible light irradiation. The results show that the existence of amorphous phase and RE ions lead to both act as electron traps to capture the electron and promote the separation of photoinduced charge carriers. In addition, the midgap energy levels induced by RE ions lead to further energy transfer in the up‐conversion process to enhance the absorption of photons and boost the lifetime of photocarriers to improve the photocatalytic performance. The NaBiS 2 sample with 5%Nd and 5%Sm possess the best catalytic activity in which the degradation efficiency of RhB is beyond 90% under the visible light irradiation for 60 min. Furthermore, the photocatalytic mechanism of NaBiS 2 is discussed in detail.