Integrating K and P co-doped g-C3N4 with ZnFe2O4 and graphene oxide for S-scheme-based enhanced adsorption coupled photocatalytic real wastewater treatment

被引：77
|
作者：
Kumar R. [1 ]
Sudhaik A. [1 ]
Sonu [1 ]
Raizada P. [1 ]
Nguyen V.-H. [2 ]
Van Le Q. [3 ]
Ahamad T. [4 ]
Thakur S. [5 ]
Hussain C.M. [6 ]
Singh P. [1 ]
机构：
[1] School of Advanced Chemical Sciences, Shoolini University, Himachal Pradesh, Solan
[2] Centre for Herbal Pharmacology and Environmental Sustainability, Chettinad Hospital and Research Institute, Chettinad Academy of Research and Education, Tamil Nadu, kelambakkam
[3] Department of Materials Science and Engineering, Korea University, 145, Anamro Seongbuk-gu, Seoul
[4] Department of Chemistry, College of Science, King Saud University, Riyadh
[5] Department of Organic Chemistry, Bioorganic Chemistry and Biotechnology, Silesian University of Technology, B. Krzywoustego 4, Gliwice
[6] Department of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark, 07102, NJ
来源：
Chemosphere | 2023年 / 337卷
关键词：
Co-doped graphitic carbon nitride; Magnetic photocatalyst; Real wastewater treatment; S-scheme heterojunction; Zinc ferrite;
D O I：
10.1016/j.chemosphere.2023.139267
中图分类号：
学科分类号：
摘要：
Recently, there has been a significant increase in the interest of using photocatalysis for environmental clean-up applications. In this research, potassium, and phosphorus co-doped graphitic carbon nitride (KPCN) photocatalyst modified with graphene oxide (GO) and heterostructured with ZnFe2O4 was synthesized via the hydrothermal method (KPCN/GO/ZnFe2O4). The photoactivity of KPCN/GO/ZnFe2O4 photocatalyst was examined for the photocatalytic degradation of target pollutants such as methylene blue (MB) dye, rhodamine B (RhB) dye, and tetracycline (TC) antibiotic. Furthermore, the chemical oxygen demand (COD) removal efficiency for real wastewater was determined to explore the practical application of KPCN/GO/ZnFe2O4 photocatalyst. The degradation efficiencies of bare graphitic carbon nitride, KPCN, KPCN/GO, and KPCN/GO/ZnFe2O4 photocatalysts for tetracycline antibiotics were 30%, 42%, 57%, and 87% within 60 min, respectively. Moreover, KPCN/GO/ZnFe2O4 photocatalyst showed 71% COD removal efficiency within 240 min. The •OH and •O2− were the major reactive species in the photocatalytic process. Results showed that the degradation efficiencies of graphitic carbon nitride were greatly enhanced upon doping and further improved with the addition of GO and ZnFe2O4. Doping improved light harvesting, GO enhanced the adsorption ability and heterojunction with ZnFe2O4 enhanced the charge separation as well as the reusability of synthesized KPCN/GO/ZnFe2O4 photocatalyst. © 2023 Elsevier Ltd
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