Journal
SCIENCE OF THE TOTAL ENVIRONMENT
Volume 711, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.scitotenv.2019.134643
Keywords
CuBi2O4/Ag3PO4 composite; Photocatalysis; Diclofenac sodium; Photodegradation; Pollutant
Categories
Funding
- National Natural Science Foundation of China [51708116]
- Doctoral Fund of Ministry of Education of China [2019M663139]
- 13th Five-Year Plan of Educational Science in Guangdong Provincespecial Innovation Projects (Natural Science) [2018KTSCX243]
- Science and Technology Planning Project of Guangdong Province, China [2017B030314175]
- Scientific Research Foundation for High-level Talents of Foshan University [gg07014]
Ask authors/readers for more resources
Highly efficient visible-light-responsive Z-Scheme CuBi2O4/Ag3PO4 photocatalysts were prepared by a hydrothermal synthesis and in-situ deposition method and characterized comprehensively. Under visible-light irradiation, the photocatalytic performance of CuBi2O4/Ag3PO4 in the degradation of diclofenac sodium (DS) in aqueous solutions was studied under different conditions such as different catalyst composition, solution pH, and concentration of S2O82- or H2O2, and the response surface methodology (RSM) was used to analyze the interaction effect of the parameters. The optimal activity of CuBi2O4/Ag3PO4 was achieved at the mass ratio of 3:7 and pH of 4.42. Moreover, the introduced S2O82- could significantly enhance the catalytic activity of CuBi2O4/Ag3PO4; when 1 mM S2O82- was added to the catalytic system, 10 mg/L of DS could be completely degraded within 60 min, but the structure of CuBi2O4/Ag3PO4 was severely destroyed. While when H2O2 was introduced into the system, both the activity and stability of CuBi2O4/Ag3PO4 were improved significantly. Finally, the photodegradation pathway of DS is proposed and the photocatalytic mechanism of CuBi2O4/Ag3PO4 under different conditions is explained. CuBi2O4/Ag(3)PO(4)and CuBi2O4/Ag3PO4 (S2O82-) photocatalytic systems follow the Z-Scheme theory, and Ag formed on the surface of catalyst serves as the recombination center for the photogenerated e from the conduction band (CB) of Ag3PO4 and h(+) from the valence band (VB) of CuBi2O4; meanwhile, the catalytic degradation of DS by CuBi2O4/Ag3PO4 in the presence of H2O2 follows the heterojunction energy band theory. (C) 2019 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available