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Investigation on the Different Photocatalytic Properties of Bismuths Oxychlorides: Bi 12 O 15 Cl 6 versus Bi 3 O 4 Cl versus BiOCl
Author(s) -
Gu Wenhao,
Xu Juan,
Teng Fei,
Ul Abideen Zain
Publication year - 2018
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201801318
Subject(s) - irradiation , photocatalysis , absorption (acoustics) , analytical chemistry (journal) , visible spectrum , materials science , degradation (telecommunications) , nuclear chemistry , chemistry , catalysis , optoelectronics , physics , organic chemistry , telecommunications , computer science , nuclear physics , composite material
It is found that under UV light (λ≤420 nm) irradiation, the photo activity of Bi 12 O 15 Cl 6 is 1 times higher than that of BiOCl for the degradation of methyl orange (MO), which is mainly attributed to the wider light absorption range and higher charge separation efficiency, but rather than BET area (4.5 m 2 g −1 vs . 15.9 m 2 g −1 ). Under visible light (λ>420 nm) irradiation, the photo activity of Bi 12 O 15 Cl 6 is 3.3 times higher than that of Bi 3 O 4 Cl for the degradation of MO, which is mainly attributed to the higher charge separation efficiency and higher BET area (0.4 m 2 g −1 ), rather than light absorption range (2.86 vs . 2.63 eV). Under UV light irradiation (λ≤420 nm), the photo activity of BiOCl is 1 times higher than that of Bi 3 O 4 Cl for the degradation of MO, which is mainly ascribed to the higher BET area (15.9 vs . 0.4 m 2 g −1 ) and the higher charge separation efficiency, rather than light absorption (3.4 vs . 2.63 eV). This work suggests that various affecting factors should be fully investigated to correctly understand the photochemical properties of a photocatalyst.