Design of FeCoNiSmNd-co-doped porous carbon catalysts from pulverized coal for radical and non-radical peroxymonosulfate activation in organic pollutant degradation
Journal
Journal of Industrial and Engineering Chemistry
ISSN
1226-086X
Date Issued
2025-11
Author(s)
Zhen Wu
Lisheng Wang
Xiaohan Wang
Bin Zhao
Heliang Fan
Xueyu Tao
Ming Zheng
Yasser Vasseghian
Hojjati Najafabadi Akbar
CUMT, China University of Mining and Technology, JiangXi University of Science and Technology
Litong Guo
Abstract
Pulverized coal has a good specific surface area, surface activity, and adsorption properties, which can be utilized to construct new carbon materials. In this work, multi-rare-earth elements co-doped coal-based composite catalysts are synthesized using a pyrolysis carbonization route with pulverized coal as the carbon source.
The performance for the catalytic activation of persulfate is investigated with TC as the representative contaminant. The results demonstrate that the porous carbon-based catalyst with uniform doping of transition metals and rare earth metals is prepared with a surface area equal to 654 m2/g. This coal-based catalyst has good degradation efficiencies for TC (95.7 %), RhB (100.0 %), MO (90.0 %), and MB (100.0 %) in 30 min, respectively.
The MB and RhB could be entirely degraded within 20 and 10 min, respectively. The activation energy of the reaction system is 16.21 kJ/mol. According to the free radical quenching reaction, the degradation of active compounds of tetracycline (TC) is calculated, which showed that O2•−(39.1 %), SO4•− (27.1 %), 1O2 (22.4 %) and •OH (15.6 %) all played important roles during the degradation of TC. The catalyst retains 94.5 % of its degradation efficiency after four cycles of use.
The degradation efficiency and reaction rate constants of the system to degrade TC in lake water, tap water and seawater all increased due to the effect of Cl-, from 89.2 % and 0.2126 min−1 to 97.0 % and 0.3466 min−1, respectively, which showed the catalysts used have a good adaptability with different water.
The performance for the catalytic activation of persulfate is investigated with TC as the representative contaminant. The results demonstrate that the porous carbon-based catalyst with uniform doping of transition metals and rare earth metals is prepared with a surface area equal to 654 m2/g. This coal-based catalyst has good degradation efficiencies for TC (95.7 %), RhB (100.0 %), MO (90.0 %), and MB (100.0 %) in 30 min, respectively.
The MB and RhB could be entirely degraded within 20 and 10 min, respectively. The activation energy of the reaction system is 16.21 kJ/mol. According to the free radical quenching reaction, the degradation of active compounds of tetracycline (TC) is calculated, which showed that O2•−(39.1 %), SO4•− (27.1 %), 1O2 (22.4 %) and •OH (15.6 %) all played important roles during the degradation of TC. The catalyst retains 94.5 % of its degradation efficiency after four cycles of use.
The degradation efficiency and reaction rate constants of the system to degrade TC in lake water, tap water and seawater all increased due to the effect of Cl-, from 89.2 % and 0.2126 min−1 to 97.0 % and 0.3466 min−1, respectively, which showed the catalysts used have a good adaptability with different water.