标題: Core-shell FeMn@NG derived from cellulose supported Prussian blue analogs for peroxymonosulfate activation: Non-radical mechanism and ultra-low metal leaching

作者: Xiong, WX (Xiong, Wenxue); Hu, F (Hu, Feng); Liu, Y (Liu, Ying); Nie, G (Nie, Gang); Xiao, L (Xiao, Ling)

來源出版物: JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING 卷: 10 期: 5 文獻号: 108523 DOI: 10.1016/j.jece.2022.108523 出版年: OCT 2022

摘要: FeMn bimetallic nanoparticles coated with nitrogen-doped graphene shells (FeMn@NG) were prepared by calcination of cellulose supported Prussian blue analogs under N-2 flow, and used as catalysts to activate per-oxymonosulfate (PMS) for the degradation of 2,4,6-trichlorophenol (2,4,6-TCP). The addition of cellulose during the formation of Prussian blue analogs reduced the agglomeration of metal particles in the subsequent carbonization process, thus increasing the specific surface area and enhancing the catalytic efficiency of the obtained catalyst.O- 1(2) and the electron transfer pathway were proved to be the main mechanisms by radical quenching experiment, electron paramagnetic resonance and chronoamperometry analysis. The metal leaching of lower than 0.1 mg L-1 and high catalytic stability were attributed to the stable core-shell structure that the metals were encapsulated and protected by graphene shells. The XPS analysis implied that a Fe/Mn redox cycle existed and played a role in balancing electrons during the PMS activation. This study shows that the PMS activator with high catalytic activity can be obtained for the degradation of pollutants by combining Prussian blue analogs with cellulose.

作者關鍵詞: FeMn bimetallic; Cellulose; 2,4,6-trichlorophenol; Peroxymonosulfate; Carbon materials

地址: [Xiong, Wenxue; Hu, Feng; Liu, Ying; Nie, Gang; Xiao, Ling] Wuhan Univ, Sch Resource & Environm Sci, Key Lab Biomass Resource Chem & Environm Biotechno, Wuhan 430072, Peoples R China.

通訊作者地址: Xiao, L (通訊作者)，Wuhan Univ, Sch Resource & Environm Sci, Key Lab Biomass Resource Chem & Environm Biotechno, Wuhan 430072, Peoples R China.

電子郵件地址: xiaoling9119@whu.edu.cn

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