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Iodine‐Deficient BiO 1.2 I 0.6 Coupling with Bi 2 O 3 for Degradation of Volatile Organic Compounds under Simulated Sunlight Irradiation
Author(s) -
Wang Shaomang,
Guan Yuan,
Zeng Ruiheng,
Zhang Zhijun,
Liu Liang,
Li Zhongyu,
An Wen,
Fu Yang
Publication year - 2019
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201901627
Subject(s) - photocatalysis , toluene , decomposition , photocurrent , mineralization (soil science) , degradation (telecommunications) , iodine , irradiation , chemistry , thermal decomposition , photochemistry , nuclear chemistry , analytical chemistry (journal) , materials science , organic chemistry , catalysis , nitrogen , optoelectronics , telecommunications , physics , computer science , nuclear physics
A photocatalyst with a high separation efficiency of carriers is crucial for the photocatalytic efficient decomposition of volatile organic compounds (VOCs). In this work, a new iodine‐deficient BiO 1.2 I 0.6 /Bi 2 O 3 photocatalyst was developed through a solvothermal approach coupled with thermal decomposition. The 2 wt % BiO 1.2 I 0.6 /Bi 2 O 3 sample demonstrated optimal photocatalytic activity for the degradation of toluene, achieving a 55.1 % mineralization ratio under 8 h of irradiation, which was 14.9 and 2.1 times higher than those of BiO 1.2 I 0.6 and Bi 2 O 3 , respectively. Compared with BiO 1.2 I 0.6 and Bi 2 O 3 , 2 wt % BiO 1.2 I 0.6 /Bi 2 O 3 exhibited the weakest fluorescence band, highest photocurrent density, and lowest impedance; thus suggesting that Bi 2 O 3 compounded by 2 wt % BiO 1.2 I 0.6 distinctly promoted the separation efficiency of carriers. The hydroxyl radical ( . OH) was the main active species, apart from holes, for the photocatalytic degradation of toluene.