光催化
食腐动物
降级(电信)
催化作用
化学
兴奋剂
化学工程
材料科学
激进的
有机化学
计算机科学
电信
光电子学
工程类
作者
Tongtong Zhang,Binhua Liu,Qiangang Li,Xiaoxu Niu,Zhiheng Xia,Qi Lu,Guohua Liu,Yingxu Liu,Aihua Gao,Hongchen Wang
标识
DOI:10.1016/j.seppur.2024.128386
摘要
As an advanced oxidation method, Fenton oxidation has been extensively studied in industrial wastewater treatment. However, its drawbacks such as high reagent dosage, costliness, and the generation of secondary pollutants have limited its application in urban sewage treatment. Photocatalytic in-situ hydrogen peroxide (H2O2) generation and the construction of photocatalysis-self-Fenton oxidation system (PSFs) is considered a potential approach for applying Fenton oxidation in the sewage treatment industry. In this paper, a nitrogen vacancy-modified B-doped g-C3N4 photocatalyst with high efficiency of H2O2 production without adding a scavenger was prepared based on ion-doping and defect construction. Combined with both characterization analysis and theoretical calculation, it was clarified that the modified catalyst enhanced the photo-generated charge separation and transfer. A PSFs was constructed by adding Fe2+ for the degradation of tetracycline (TC). The system produced H2O2 in-situ through photocatalytic action and promoted the Fe2+/Fe3+ cycle under the action of photo-generated electrons. The system achieved almost complete degradation of TC under the joint action of hydroxyl radicals and superoxide radicals, and maintained more than 90 % degradation efficiency after five cycles. And the efficiency of PSFs was significantly improved compared with that of single photocatalysis and photo-Fenton oxidation.
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