标题: Magnetic porous carbon materials derived from metal-organic framework in-situ growth on natural cellulose of wood for sulfadiazine degradation: Role of delignification and mechanisms

作者: Zheng, KW (Zheng, Kewang); Xiao, L (Xiao, Ling)

来源出版物: INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES  卷: 248  文献号: 125902  DOI: 10.1016/j.ijbiomac.2023.125902  出版年: SEP 1 2023  

摘要: Magnetic porous carbon materials as peroxymonosulfate (PMS) activators for sulfadiazine degradation were derived from metal-organic frameworks (MOFs) grown in-situ on the cellulose of wood through the one-step pyrolysis method. The cellulose was obtained by treating wood powder with sodium chlorite to remove lignin, and Fe-MOFs (MIL-101(Fe)) nanoparticles were in-situ grown on the cellulose through hydrothermal reaction. The delignification of wood effectively enhanced the in-situ growth of MIL-101(Fe) on the wood tracheid skeleton, increased the specific surface area of magnetic porous carbon material (Fe@PC-50) after pyrolysis, and improved the performance of Fe@PC-50 as a PMS activator for the degradation of sulfadiazine. With the presence of 0.04 g L-1 Fe@PC-50 and 0.12 g L-1 PMS, the degradation percentage of sulfadiazine (20 mg L-1) could reach 100 % within 15 min, indicating excellent catalytic activity. Quenching tests and electron paramagnetic resonance (EPR) indicated that both free and non-free radicals played important roles in PMS activation. X-ray photoelectron spectroscopy (XPS) suggested that Fe0 and Fe3C were the possible important active sites for sulfadiazine degradation. This work offered an effective method to synthesize PMS activators from biomass/MOF materials for water treatment.

作者关键词: Wood; Metal-organic frameworks; Sulfadiazine; Delignification; Peroxymonosulfate

KeyWords Plus: PEROXYMONOSULFATE ACTIVATION; ANTIBIOTIC-RESISTANCE; PERFORMANCE; ELECTROCATALYSTS; FE; COMPOSITE; BIOCHAR

地址: [Zheng, Kewang; Xiao, Ling] Wuhan Univ, Sch Resource & Environm Sci, Key Lab Biomass Resource Chem & Environm Biotechno, Wuhan 430072, Peoples R China.

通讯作者地址: Xiao, L (通讯作者)，Wuhan Univ, Sch Resource & Environm Sci, Key Lab Biomass Resource Chem & Environm Biotechno, Wuhan 430072, Peoples R China.

电子邮件地址: xiaoling9119@whu.edu.cn

影响因子：8.2