期刊
SEPARATION AND PURIFICATION TECHNOLOGY
卷 267, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.seppur.2021.118607
关键词
Fixed-bed; Pebbles; Pharmaceutical; Electrochemical
资金
- National Research Foundation of Korea (NRF) - Korean government (MIST: Ministry of Science and ICT) [2019R1A2C2085250]
A series of SnO2-modified-g-C3N4 photocatalysts were prepared via a hydrothermal method, with the 4% modified sample showing significantly higher surface area and improved photocatalytic performance under visible light. The catalyst was successfully immobilized on low-cost, highly durable, and eco-friendly pebbles, expanding its practical applications. Additionally, the extended applications of the photocatalyst were studied through photoelectrochemical behaviors and electrochemical impedance spectroscopy.
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.
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