文献类型：期刊文献

英文题名：Degradation of TeCG catalyzed by graphene quantum Dot-reconstituted magnetic hydrotalcite composites

作者：Huang, Yan[1];Mu, Guangda[1];Huan, Weiwei[2];Yang, Yuxiang[1];Yuan, Hongmin[3];Batool, Irum[1];Yao, Pingping[1];Wang, Chengyin[4];Liu, Xiangnong[6];Ni, Chaoying[5]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[2]Zhejiang A&F Univ, Coll Chem & Mat Engn, Hangzhou 311300, Zhejiang, Peoples R China;[3]Jilin Univ, State Key Lab Inorgan Synth & Preparat Chem, Changchun 130012, Peoples R China;[4]Yangzhou Univ, Coll Chem & Chem Engn, 180 Si Wang Ting Rd, Yangzhou 225002, Peoples R China;[5]Univ Delaware, Dept Mat Sci & Engn, Newark, DE 19716 USA;[6]Yangzhou Univ, Anal Test Ctr, Yangzhou 225009, Peoples R China

年份：2025

卷号：507

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20250817911024);WOS:【SCI-EXPANDED(收录号:WOS:001430837000001)】；

语种：英文

外文关键词：Layered double hydroxide; Graphene quantum dots; Heterogeneous Fenton reagent; Tetrachloroguaiacol; Degradation mechanism

摘要：The traditional chlorine bleaching technique produces highly toxic tetrachloroguaiacol (TeCG), a chemical that not only poses a serious threat to aquatic organisms and disrupts the food chain in the ecosystem, but also causes a series of health problems. In order to remove TeCG from wastewater, a novel Fenton catalyst was developed in this study, and graphene quantum dots (GQDs) were successfully prepared by a hydrothermal method using citric acid and cysteine as raw materials, and Mg/Al/Fe-LDHs/GQDs were prepared by reconstituting calcined Mg/Al/ Fe-LDHs using GQDs. simulation experiments were conducted to verify that the The key role of GQDs in TeCG degradation: the introduction of GQDs significantly increased the specific surface area and dispersibility of the catalysts, and meanwhile accelerated the charge transfer on the catalyst surface, enhanced the separation efficiency of charge carriers, and enhanced the degradation efficiency of the pollutants. The results showed that the maximum removal rate of the catalyst for 10 mg/L TeCG could reach 89.34 % within 60 min, and the catalyst maintained high stability after several cycles. According to the gas chromatography-mass spectrometry (GC-MS) analysis, the decomposition of TeCG was mainly converted to low-toxicity or non-toxicity products through oxidative dechlorination and aryl ring cleavage processes. The multiphase Fenton catalyst reconstituted by GQDs proposed in this paper has the ability to remove chlorinated pollutants with high efficiency, which shows a broad application prospect in the field of wastewater treatment and provides important theoretical and experimental support for the development of efficient Fenton catalysts.