Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 404, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jhazmat.2020.124171
Keywords
G-C3N4; Binary doped; Adsorption-Photocatalysis synergy; Berberine Hydrochloride; Hexavalent chromium
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Funding
- cultivation foundation of South China Normal University for young teachers [16 KJ20]
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The coexistence of antibiotics and inorganic heavy metals pollutants in wastewater has become a universal phenomenon due to the rapid development of modern industry. Developing efficient and eco-friendly photocatalysts to degrade mixed pollutants is significant. The synergistic mechanism of adsorption-photocatalysis was unveiled through a series of experiments, demonstrating the efficient removal of organic pollutants and Cr(VI) simultaneously.
Due to the rapid development of modern industry, the coexistence of antibiotics and inorganic heavy metals pollutants in wastewater has become a universal phenomenon. Therefore, developing efficient and eco-friendly photocatalyst for mixed pollutants degradation is significant. In this work, a well-designed phosphorus and sulfur co-doped g-C3N4 with feeble N vacancies catalyst (P/S-g-C3Nx) was fabricated by supramolecular self-assembly method, and was applied to remove berberine hydrochloride (BH) and Cr(VI) simultaneously with the synergy of adsorption-photocatalysis. A series of experiments was conducted to unveil the synergistic mechanism. The kinetic models indicated that the adsorption of P/S-g-C3Nx improved the BH removal process by accelerating the photo-degradation, because the adsorption rate > surface degradation rate > bulk degradation rate. Besides, the photo-degradation process improved the BH removal rate by regenerating the adsorption sites of P/S-g-C3Nx. Moreover, from the experiments in BH-Cr(VI) mixed solution system, the existence of BH also enhanced the surface adsorption of Cr(VI) in P/S-g-C3Nx sample, and the reduction rate of Cr(VI) was also promoted with the existence of BH. Overall, the results of this investigation suggest that the adsorption-photocatalysis synergy method is an efficient way to eliminate organic pollutant and Cr(VI) simultaneously.
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