TY - JOUR
T1 - Photocatalytic degradation of 2-Mercaptobenzothiazole by a novel Bi 2 WO 6 nanocubes/In(OH) 3 photocatalyst
T2 - Synthesis process, degradation pathways, and an enhanced photocatalytic performance mechanism study
AU - Qin, Yingying
AU - Li, Hong
AU - Lu, Jian
AU - Ding, Yingchun
AU - Ma, Changchang
AU - Liu, Xinlin
AU - Liu, Zhi
AU - Huo, Pengwei
AU - Yan, Yongsheng
N1 - Publisher Copyright:
© 2019
PY - 2019/7/1
Y1 - 2019/7/1
N2 - Designing and developing an efficient photocatalytic system for degrading organic pollutants was a research hotspot in the field of environmental governance. In this study, a novel Bi 2 WO 6 /In(OH) 3 composite photocatalyst was first fabricated via facile calcination-hydrothermal synthesis method. The 9-Bi 2 WO 6 /In(OH) 3 composite had superior photocatalytic performance for degrading the 2-Mercaptobenzothiazole (MBT) under visible-light irradiation. The degradation rate constant of 9-Bi 2 WO 6 /In(OH) 3 was 0.02192 min −1 , which was 2.3 times than that of pure Bi 2 WO 6 (0.00948 min −1 ). The improvement in photocatalytic performance was due to the synergistic effect of the surface heterojunction and the electron-transfer medium. The density functional theory (DFT) showed that the difference in energy levels between the conduction bands and valence bands of Bi 2 WO 6 nanocubes (010) and (001) could build the surface heterojunction, which was in favor to promote the electron-hole pairs separation. And the In(OH) 3 not only acted as a supporter to prevent the agglomeration of small size Bi 2 WO 6 nanocubes, but also served as electron-transfer mediator to inhibit the recombination of electrons and holes. This study provided a reference value for the development and utilization of Bi-based photocatalysts. Considering the properties and structural characteristics of Bi-based photocatalysts and hydroxides, Bi 2 WO 6 /In(OH) 3 composite photocatalysts were design reasonably, which provided a variety of the types of photocatalysts.
AB - Designing and developing an efficient photocatalytic system for degrading organic pollutants was a research hotspot in the field of environmental governance. In this study, a novel Bi 2 WO 6 /In(OH) 3 composite photocatalyst was first fabricated via facile calcination-hydrothermal synthesis method. The 9-Bi 2 WO 6 /In(OH) 3 composite had superior photocatalytic performance for degrading the 2-Mercaptobenzothiazole (MBT) under visible-light irradiation. The degradation rate constant of 9-Bi 2 WO 6 /In(OH) 3 was 0.02192 min −1 , which was 2.3 times than that of pure Bi 2 WO 6 (0.00948 min −1 ). The improvement in photocatalytic performance was due to the synergistic effect of the surface heterojunction and the electron-transfer medium. The density functional theory (DFT) showed that the difference in energy levels between the conduction bands and valence bands of Bi 2 WO 6 nanocubes (010) and (001) could build the surface heterojunction, which was in favor to promote the electron-hole pairs separation. And the In(OH) 3 not only acted as a supporter to prevent the agglomeration of small size Bi 2 WO 6 nanocubes, but also served as electron-transfer mediator to inhibit the recombination of electrons and holes. This study provided a reference value for the development and utilization of Bi-based photocatalysts. Considering the properties and structural characteristics of Bi-based photocatalysts and hydroxides, Bi 2 WO 6 /In(OH) 3 composite photocatalysts were design reasonably, which provided a variety of the types of photocatalysts.
KW - Bi WO /In(OH)
KW - Crystal growth mechanism
KW - Electron-transfer mediator
KW - Photocatalytic degradation
KW - Surface heterojunction
UR - http://www.scopus.com/inward/record.url?scp=85063464849&partnerID=8YFLogxK
U2 - 10.1016/j.apsusc.2019.03.244
DO - 10.1016/j.apsusc.2019.03.244
M3 - 文章
AN - SCOPUS:85063464849
SN - 0169-4332
VL - 481
SP - 1313
EP - 1326
JO - Applied Surface Science
JF - Applied Surface Science
ER -