Photocatalytic activation of sulfite by N-doped porous biochar/MnFe_(2)O_(4) interface-driven catalyst for efficient degradation of tetracycline  

作　　者：Long Cheng Yuanhui Ji 

机构地区：[1]Jiangsu Province Hi-Tech Key Laboratory for Biomedical Research,School of Chemistry and Chemical Engineering,Southeast University,Nanjing,211189,China

出　　处：《Green Energy & Environment》2024年第3期481-494,共14页绿色能源与环境（英文版）

基　　金：gratefully acknowledge the financial support for this research from the National Natural Science Foundation of China(Grant No.:21978047,21776046);the Six Talent Climax Foundation of Jiangsu(Grant No.:XCL-079).

摘　　要：A novel photo-catalytic system composed of N-doped biochars(NBCs),MnFe_(2)O_(4) and sulfite activation under ultraviolet(NBCs/MnFe_(2)O_(4)/sulfite/UV)was constructed to realize the efficient eliminate of tetracycline(TC).As the carrier of MnFe_(2)O_(4),NBCs were synthesized from alfalfa,which has large specific surface area,graphite like structure and hierarchical porous structure.The adsorption isotherm indicated that NBCs/MnFe_(2)O_(4)-2:1 had the best adsorption performance for TC(347.56 mg g^(-1)).Through synergistic adsorption and photocatalysis,the removal rate of TC reached 84%,which was significantly higher than that of MnFe_(2)O_(4).Electrochemical impedance spectroscopy(EIS)and Photoluminescence(PL)characterization results showed that the introduction of NBCs improved the separation efficiency of photogenerated electron and hole pairs and enhanced the photocatalytic performance.Moreover,the adsorption,degradation mechanism and degradation path of TC by the catalyst were systematically analyzed by coupling HPLC–MS measurement with the theoretical calculation.Considering the advantages of excellent degradation performance,low cost,easy separation and environmental friendliness of NBCs/MnFe_(2)O_(4),this work was expected to provide a new path for the practical application of biochar.

关 键 词：BIOCHAR MnFe_(2)O_(4) SULFITE Adsorption PHOTOCATALYSIS 

分 类 号：X703[环境科学与工程—环境工程] O643.36[理学—物理化学] O644.1[理学—化学]