标题: Prussian blue analogs derived nanostructured Mn/Fe bimetallic carbon materials for organic pollutants degradation via peroxymonosulfate activation

作者: Liu, Y (Liu, Ying); Tian, X (Tian, Xue); Xiong, WX (Xiong, Wenxue); Nie, G (Nie, Gang); Xiao, L (Xiao, Ling)

来源出版物: COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS 卷: 657 文献号: 130592 DOI: 10.1016/j.colsurfa.2022.130592 子辑: B 出版年: JAN 20 2023

摘要: In this study, using Prussian blue analogs (Mn-Fe PBAs) as the precursors, Mn/Fe bimetal loaded N-doped carbon materials (Mn-Fe-CN) were obtained by pyrolysis followed by acid etching. The influences of calcination tem-perature and the molar ratio of Fe/Mn in precursor were investigated. Mn-Fe-CN obtained by calcining Mn-Fe PBAs precursors with Fe/Mn molar ratio of 0.5 at 700 degrees C exhibited high activity for degradation of rhoda-mine b (RhB) by activating peroxymonosulfate (PMS). Acid etching achieved higher catalytic activity by removing excessive agglomerated metals generated during pyrolysis process and exposing more catalytic active sites in the catalyst. Fe, Mn and N-doped carbon were the active sites of the catalyst. In the Mn-Fe-CN/PMS/ RhB system, there was a redox cycle between Fe and Mn with multivalent states. O2 & BULL; and 1O2 were found to be the major reactive oxygen species, while & BULL;OH, SO4 & BULL; and electron transfer between Mn-Fe-CN and PMS, RhB played the minor roles. This work could provide a reference for further development of high performance and envi-ronmentally friendly catalyst.

作者关键词: Mn; Fe bimetal; Peroxymonosulfate; Carbon materials; Prussian blue analogues; Rhodamine b

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

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

电子邮件地址: xiaoling9119@whu.edu.cn

影响因子：5.2