林产化学与工业2025，Vol.45Issue(5)：96-104,9.DOI:10.20195/j.issn.0253-2417.2024122
磁性多孔炭纳米复合材料的制备及其亚甲基蓝吸附性能研究
Preparation and Methylene Blue Adsorption Performance of Magnetic Porous Carbon Nanocomposites
摘要
Abstract
Magnetic biochar was prepared using jujube wood as raw material and FeCl2·4H2O as the precursor of magnetic agent through a simple impregnation-pyrolysis method,which was then activated by KOH to obtain magnetic porous carbon nanocomposites(Fe@PC).The adsorption performance of Fe@PC for methylene blue(MB)was investigated.The experimental results showed that the prepared magnetic composite Fe@PC-0.3(added 0.3 g FeCl2·4H2O)well retained the original tubular structure of jujube wood,with a high specific surface area(1 976.04 m2/g),total pore volume(0.957 cm3/g),and average pore diameter(1.94 nm).The material surface contained functional groups including—OH,C＝O,C＝C,C—H,and Fe—O,which could provide effective transmission channels and abundant adsorption sites for MB molecules.The adsorption capacity of Fe@PC-0.3 for MB could reach 712.85 mg/g,and it could achieve a rapid adsorption of 430.09 mg/g within 5 minutes.It also had good magnetic responsiveness,facilitating the separation and recovery after adsorption.The adsorption process was conformed to pseudo-second-order kinetic model(R2＞0.99)and the Langmuir adsorption isotherm model(R2＞0.99).Thermodynamic analysis indicated that the adsorption process was a spontaneous endothermic reaction,and the adsorption capacity increased with the rise in temperature.The adsorption mechanism of Fe@PC-0.3 for MB was mainly dominated by chemical adsorption of bio-based porous carbon,while the magnetic component Fe also played a synergistic role in the adsorption process,with multiple mechanisms jointly controlling.关键词
磁性多孔炭/亚甲基蓝/吸附Key words
magnetic porous carbon/methylene blue/adsorption分类
化学工程引用本文复制引用
毛志杰,张博,黄美娟,贾爽,刘佳鑫,王彩娟..磁性多孔炭纳米复合材料的制备及其亚甲基蓝吸附性能研究[J].林产化学与工业,2025,45(5):96-104,9.基金项目
新疆维吾尔自治区高校基本科研业务费资助项目(XJEDU2024P093) （XJEDU2024P093）
大学生创新训练计划项目(202413558002) （202413558002）
