期刊
APPLIED SURFACE SCIENCE
卷 587, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2022.152889
关键词
Visible -light; Fluorination; F-TiO2/g-C3N4 heterojunction; Organic pollutants; Catalytic mechanism
类别
资金
- Environmental Protection Department of Hubei Province [2017HB04]
- Fundamental Research Funds for the Central Universities, China University of Geo-sciences (Wuhan) [CUG170102]
Highly efficient visible-light-active catalysts F-TiO2/g-C3N4 were synthesized via a one-step-calcination method, exhibiting excellent separation and migration of photoelectron-hole pairs and effective degradation of flame retardants and antibiotics.
In order to achieve excellent visible light photoactivity of TiO2, it is still urgently required to extend their optical absorption ability and improve the potential of charge separation and migration. Here we synthesized highly efficient visible-light-active catalysts F-TiO2/g-C3N4 via a one-step-calcination method. Due to the synergic effect of =Ti-F, =Ti:F-H and the heterojunction, the obtained catalysts possess promising properties as highly effi-cient separation and migration of photoelectron-hole pairs. The prepared F-TiO2/g-C3N4 heterojunction can be successfully applied to degrade the widely used flame retardants and antibiotics. More than 95% of tetra-bromobisphenol A (TBBPA) was decomposed after light illumination for 120 min, and 98% of sulfamethazine (SMZ) was degraded for 60 min by F-TiO2/g-C3N4. Furthermore, a reasonable catalytic mechanism for the F-TiO2/g-C3N4 catalysts was proposed. It could be seen that the active species & BULL;O-2-, & BULL;OH, and h(+) played important roles in the photocatalytic process under visible light illumination.
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