In-situ construction of abundant active centers on hierarchically porous carbon electrode toward high-performance phosphate electrosorption: Synergistic effect of electric field and capture sites  

作　　者：Peng Zhang Fukuan Li Mingming He Silu Huo Xueli Zhang Benqiang Cen Dezhi Fang Kexun Li Hao Wang 

机构地区：[1]College of Environmental Science and Engineering,Nankai University,Tianjin,300350,China [2]MOE Key Laboratory of Pollution Processes and Environmental Criteria,Tianjin Key Laboratory of Environmental Remediation and Pollution Control,Tianjin Key Laboratory of Environmental Technology for Complex Trans-Media Pollution,Nankai University,Tianjin,300350,China [3]State Key Laboratory of Simulation and Regulation of Water Cycles in River Basins,China Institute of Water Resources and Hydropower Research,Beijing,100038,China

出　　处：《Green Energy & Environment》2024年第1期126-137,共12页绿色能源与环境（英文版）

基　　金：This work is financially supported by the National Science Foundation of Tianjin(17JCYBJC23300).

摘　　要：Phosphate removal is crucial for eutrophication control and water quality improvement.Electro-assisted adsorption,an eco-friendly elec-trosorption process,exhibited a promising potential for wastewater treatment.However,there are few works focused on phosphate electro-sorption,and reported electrodes cannot attach satisfactory removal capacities and rates.Herein,electro-assisted adsorption of phosphate via in-situ construction of La active centers on hierarchically porous carbon(LaPC)has been originally demonstrated.The resulted LaPC composite not only possessed a hierarchically porous structure with uniformly dispersed La active sites,but also provided good conductivity for interfacial electron transfer.The LaPC electrode achieved an ultrahigh phosphate electrosorption capability of 462.01 mg g^(-1) at 1 V,outperforming most existing electrodes.The superior phosphate removal performance originates from abundant active centers formed by the coupling of electricfield and capture sites.Besides,the stability and selectivity toward phosphate capture were maintained well even under comprehensive conditions.Moreover,a series of kinetics and isotherms models were employed to validate the electrosorption process.This work demonstrates a deep understanding and promotes a new level of phosphate electrosorption.

关 键 词：Electro-assisted adsorption ELECTROSORPTION Phosphate removal Active centers MOF-derived carbon 

分 类 号：X52[环境科学与工程—环境工程]