无机材料学报2024，Vol.39Issue(4)：390-398,中插7-中插9,12.DOI:10.15541/jim20230473
接枝内酯基活性炭增强苯乙烯吸附性能研究
Enhanced Styrene Adsorption by Grafted Lactone-based Activated Carbon
摘要
Abstract
Activated carbon's porous nature and high specific surface area make it an effective tool for adsobing waste gas containing styrene.However,the mechanism by which oxygen-containing functional groups adsorb weak-polar styrene remains unclear.This study described the preparation of the modified activated carbon materials AC-S and AC-N using the acid leaching method.The pore structure and specific surface area of modified activated carbon,the evolution of oxygen-containing functional groups,and their impact on the styrene-adsorbing performance were investigated.The results demonstrated that acid modification significantly improved the styrene-adsorbing capacity of activated carbon.Physical and chemical adsorption impacted both modified and unmodified activated carbon materials,as determined by the adsorption kinetics studies and isotherm fitting analyses.Monolayer adsorption was more likely to occur on modified activated carbon.HNO3-modified activated carbon(AC-N)maintained its effective styrene adsorption pore size range.The increasing number of oxygen-containing functional groups on the surface improved the styrene adsorption performance of AC-N.Study of oxygen-containing functional groups on the surface revealed that lactone group was a key factor in improving the modified activated carbon's ability to adsorb styrene.Density functional theory(DFT)calculations showed that lactone group on AC-N strongly interacted with the vinyl group in styrene,thereby enhancing the styrene adsorption performance of modified activated carbon.关键词
活性炭/吸附/苯乙烯/含氧官能团/密度泛函理论(DFT)Key words
activated carbon/adsorption/styrene/oxygen-containing functional group/density functional theory(DFT)分类
化学化工引用本文复制引用
吴光宇,舒松,张洪伟,李建军..接枝内酯基活性炭增强苯乙烯吸附性能研究[J].无机材料学报,2024,39(4):390-398,中插7-中插9,12.基金项目
四川省重点研发项目(2023YFS0354)Key R&D Projects of Sichuan Province(2023YFS0354) （2023YFS0354）
