文献类型：期刊文献

英文题名：Efficient degradation of levofloxacin using a g-C3N4@glucose-derived carbon catalyst with adjustable N content via peroxymonosulfate activation

作者：Zhang, Xinxi[1,2];Tian, Yunhao[1,2];Zhou, Liang[1,2];Wang, Lingzhi[3,4];Zhang, Jinlong[3,4];Liu, Yongdi[1,2];Lei, Juying[1,2,5,6]

机构：[1]East China Univ Sci & Technol, Natl Engn Res Ctr Ind Wastewater Detoxicat & Resou, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asses, 130 Meilong Rd, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Shanghai Engn Res Ctr Multimedia Environm Catalysi, 130 Meilong Rd, Shanghai 200237, Peoples R China;[4]Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China;[5]East China Univ Sci & Technol, Sch Chem & Mol Engn, Feringa Nobel Prize Scientist Joint Res Ctr, Key Lab Adv Mat, 130 Meilong Rd, Shanghai 200237, Peoples R China;[6]East China Univ Sci & Technol, Sch Chem & Mol Engn, Feringa Nobel Prize Scientist Joint Res Ctr, Joint Int Res Lab Precis Chem & Mol Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2023

卷号：314

外文期刊名：CHEMOSPHERE

收录：;EI(收录号：20230213365576);WOS:【SCI-EXPANDED(收录号:WOS:000919324400001)】；

基金：This work was financially supported by the National Natural Science Foundation of China (22076046, 22176061) , the Science and Technology Commission of Shanghai Municipality (21230712000,19ZR1472400) , and the Fundamental Research Funds for the Central Universities (JKB01221619) .

语种：英文

外文关键词：N-doped carbon-based catalyst; Graphite carbon nitride; Peroxymonosulfate; Non-radical pathway; Singlet oxygen

摘要：Metal-free carbon-based catalysts hold great promise for the degradation of organic pollutants by perox-ymonosulfate (PMS) activation because they avoid the negative effects of metal catalysts such as harmful metal ions leaching. However, these carbon-based catalysts are limited by their high cost and complex synthesis, and the mechanisms for the activation of PMS are unclear. Herein, the N-rich carbon catalysts (GCN-x) derived from glucose and g-C3N4 were facilely synthesized by hydrothermal treatment and carbonization to explore the mechanism of PMS activation. The nitrogen content of catalysts could be adjusted by simply altering the ratio of glucose and g-C3N4. GCN-2.4 with a ratio of glucose and g-C3N4 of 2.4 displayed the highest efficiency for the degradation of pollutants represented by Levofloxacin. The electron paramagnetic resonance and quenching experiments demonstrated that the non-radical pathway was dominant in Levofloxacin degradation and singlet oxygen (O-1(2)) was the main active specie. Further, we found O-1(2) was generated from superoxide radical (O-center dot(2)-) which has rarely been studied. Levofloxacin degradation rate was shown to be positively correlated with both the amount of graphitic N and pyridinic N. Graphitic N and pyridinic N were identified as the catalytic sites. The GCN-2.4/PMS system could also remove multifarious contaminants effectively. Overall, this research advances understanding of the role of N species in PMS activation and has potential practical application in wastewater treatment.