数字农科院2.0

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;Sha, Yixin;Bi, Changjun;Lin, Daoqing;Liu, Yuxue;Dai, Lichun;Wang, Xiaozhi;Lin, Hui;Jrar, Jawad Ahmad;Hou, Jianhua

作者机构：

关键词： Cr(VI) reduction;Microwave;Co-doping carbon;Frustrated-Lewis-pair;Absorption

期刊名称： JOURNAL OF WATER PROCESS ENGINEERING

ISSN： 2214-7144

年卷期： 2025 年 69 卷

页码：

收录情况： SCIE（2025版）

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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