Open AccessLow Pr‐doped Bi 2 O 3 photocatalyst with long‐wavelength response: mechanisms by first‐principles calculation
Author(s) -
Wang Guoying,
Chen Xuefu,
Li Lan,
Shi Gaofeng
Publication year - 2018
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2017.0849
Subject(s) - doping , photocatalysis , materials science , wavelength , optoelectronics , nanotechnology , chemistry , catalysis , organic chemistry
The low Pr‐doped Bi 2 O 3 photocatalyst was prepared via the acrylamide polymerisation method. The photocatalytic activity of prepared samples was evaluated by degrading methyl orange under visible‐light irradiation. In comparison to α‐Bi 2 O 3 nanoparticles, 4% Pr‐α‐Bi 2 O 3 photocatalyst exhibit obviously enhanced photocatalytic performance. The theoretical calculation and experimental results show that Pr doping can extend the optical absorption range from 436 to 518 nm and improve the photocatalytic efficiency from 40.9 to 70.4%. This long‐wavelength response can be happened because of Pr doping that gives rise to the modification of electron structure and the hybridisation of the energy levels.