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Photocatalytic and photo-electrochemical behavior of novel SnO2-modified-g-C3N4 for complete elimination of tetracycline under visible-light irradiation: Slurry and fixed-bed approach

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Abstract
We present a novel and low-cost SnO2-modified-g-C3N4 (SnCN)-coated on natural pebbles through a unique fabrication method. Initially, a succession of unique SnO2-modified-g-C3N4 (SnCN) photocatalysts was prepared via a facile hydrothermal method. The addition of SnO2 into g-C3N4 not only reduced the band-gap energy and recombination ability of the electron-hole pairs but also drastically augmented the pore volume and surface area. The BET surface area of the 4% modified sample (69.1022 m2/g) was approximately 4.5 times higher in comparison to the pure form (16.2567 m2/g). Notably, the photocatalytic performance of the SnCN samples under visible light irradiation was significantly improved, with tetracycline 40 ppm (TC) removal of up to 90.29% attained after 2 h at the optimized initial pH of 10 in the presence of 4% SnO2 modification. With a view toward the practical applications, the as-prepared catalyst was successfully immobilized over low-cost, highly durable and eco-friendly pebbles as confirmed through characterization techniques. In addition to the photocatalytic process, the extended applications of the as-prepared photocatalyst were also studied by analyzing the photoelectrochemical (PEC) behaviors through transient photocurrent response, Mott-Schottky plots, and electrochemical impedance spectroscopy (EIS) spectra.
Author(s)
웬 딘 민 타오이병규부이 탄 선Palak BansalMilad Jourshabani
Issued Date
2021
Type
Article
Keyword
ElectrochemicalFixed-bedPebblesPharmaceutical
DOI
10.1016/j.seppur.2021.118607
URI
https://oak.ulsan.ac.kr/handle/2021.oak/9267
https://ulsan-primo.hosted.exlibrisgroup.com/primo-explore/fulldisplay?docid=TN_cdi_crossref_primary_10_1016_j_seppur_2021_118607&context=PC&vid=ULSAN&lang=ko_KR&search_scope=default_scope&adaptor=primo_central_multiple_fe&tab=default_tab&query=any,contains,Photocatalytic%20and%20photo-electrochemical%20behavior%20of%20novel%20SnO2-modified-g-C3N4%20for%20complete%20elimination%20of%20tetracycline%20under%20visible-light%20irradiation:%20Slurry%20and%20fixed-bed%20approach&offset=0&pcAvailability=true
Publisher
SEPARATION AND PURIFICATION TECHNOLOGY
Location
네덜란드
Language
영어
ISSN
1383-5866
Citation Volume
267
Citation Number
1
Citation Start Page
118607
Citation End Page
118607
Appears in Collections:
Engineering > Civil and Environmental Engineering
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