One-step microwave method synthesis of N, S-codoped carbon with the frustrated Lewis pairs for Cr (VI) removal
文献类型： 外文期刊
作者： Wang, Liwen 1 ; Sha, Yixin 1 ; Bi, Changjun 1 ; Lin, Daoqing 1 ; Liu, Yuxue 2 ; Dai, Lichun 3 ; Wang, Xiaozhi 1 ; Lin, Hui 2 ; Jrar, Jawad Ahmad 1 ; Hou, Jianhua 1 ;
作者机构： 1.Yangzhou Univ, Coll Environm Sci & Engn, Yangzhou 225000, Peoples R China
2.Zhejiang Acad Agr Sci, Inst Environm Resource Soil & Fertilizer, State Key Lab Managing Biot & Chem Threats Qual &, Hangzhou 310021, Peoples R China
3.Minist Agr & Rural Affairs, Biogas Inst, Key Lab Dev & Applicat Rural Renewable Energy, Chengdu 610041, Sichuan, Peoples R China
4.Jiangsu Collaborat Innovat Ctr Solid Organ Waste R, Nanjing 210095, Peoples R China
关键词： Cr(VI) reduction; Microwave; Co-doping carbon; Frustrated-Lewis-pair; Absorption
期刊名称：JOURNAL OF WATER PROCESS ENGINEERING （ 影响因子：6.7； 五年影响因子：6.7 ）
ISSN： 2214-7144
年卷期： 2025 年 69 卷
页码：
收录情况： SCI
摘要： This study synthesized a novel N, S-codoped carbon with the frustrated Lewis pairs (NS-12) within 12 min via microwave process. Thiourea and glycerol are raw materials for carbon, nitrogen and sulfur elements. The frustrated Lewis pairs (FLPs) of NS-12 formed by adjacent -NH3+ and -SO2- groups facilitated the elimination of Cr (VI) ions, markedly enhancing hexavalent chromium reduction efficiency. NS-12 consists of agglomerated irregular nanoparticles, different from the irregular bulk microstructure of carbon materials synthesized in a chamber furnace at high temperatures (NSC). In particular, NS-12 has a richer N and S element with more frustrated Lewis pairs (FLPs) than NSC. NS-12 achieved the optimal Cr (VI) adsorption potential at pH =1. The absorption technique adhered to pseudo-second-order dynamics, and the Langmuir equilibrium profile determined the optimum absorption potential to be 296.96 mg/g. And the adsorption amount is 5.4 times more significant than that of NSC (54.73 mg/g). FTIR and XPS studies confirmed that removing Cr (VI) by NS-12 involved electrostatic attraction, surface complexation, and reduction. Therefore, the present work can quickly obtain N, S-codoped carbon using a single-step microwave technique, which provides a new way to develop heavy metal adsorption materials.
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