Journal
JOURNAL OF SOLID STATE CHEMISTRY
Volume 305, Issue -, Pages -Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2021.122703
Keywords
G-C3N4; ZnS; Phosphorus doping; Photocatalyst; Heterojunction; Tetracycline
Funding
- National Natural Science Foundation of China [21773203]
- Qing Lan Project of Jiangsu Province
- Nantong Science and Technology Program, China [JC2020105, JC2020136, JC2021021]
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The Phosphorus-doped g-C3N4/ZnS composite photocatalyst was prepared by element doping and structuring a heterojunction, showing enhanced photocatalytic properties for degrading pharmaceutical wastewater with visible light irradiation. The design and synthesis of PCN/ZnS provide a new way for photodegrading pharmaceutical wastewater with improved photocatalytic performance.
Phosphorus-doped g-C3N4/ZnS (PCN/ZnS) composite photocatalyst was prepared by element doping and structuring heterojunction by solvothermal methods. The heterojunction composite was characterized by XRD, SEM/TEM, XPS and UV -vis DRS. The photocatalytic properties of PCN, ZnS and PCN/ZnS were studied by photodegradation of tetracycline (TC) with visible light irradiation. The 15%PCN/ZnS showed the highest photocatalytic degradation performance of TC with the reaction rate constant of 0.0529 min(-1), which was 40.7 times of ZnS and 6.3 times of PCN. Superoxide radicals and holes played a major role in the photocatalytic degradation process, but not hydroxyl radicals. Besides, according to the conduction and entrainment positions of PCN and ZnS, they form a type II heterojunction structure, which could extend the range of light response, enhance the charges transfer and efficient separation. In general, the design and synthesis of PCN/ZnS provide a new way to photodegrade pharmaceutical wastewater with enhanced photocatalytic properties.
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