Oxidative degradation of chitosan by Fe-MCM-41 heterogeneous Fenton-like system

被引:2
作者
Zhang, Zhang [1 ]
Dong, Wuheng [2 ,3 ,4 ]
Huang, Yongchun [1 ,2 ,3 ,5 ]
机构
[1] Guangxi Univ Sci & Technol, Sch Biol & Chem Engn, Liuzhou 545000, Peoples R China
[2] Guangxi Univ Sci & Technol, Guangxi Key Lab Green Proc Sugar Resources, Liuzhou 545000, Peoples R China
[3] Guangxi Univ Sci & Technol, Guangxi Liuzhou Luosifen Engn Technol Res Ctr, Liuzhou 545000, Peoples R China
[4] Guangxi Univ Sci & Technol, Med Ctr, Lab Drug Design & Synth, Liuzhou 545006, Guangxi, Peoples R China
[5] Guangxi Vocat & Tech Coll, Nanning 530026, Peoples R China
来源
SCIENTIFIC REPORTS | 2024年 / 14卷 / 01期
基金
中国国家自然科学基金;
关键词
Molecular sieve; Catalyst; Fe-MCM-41; Fenton-like; OPTIMIZATION;
D O I
10.1038/s41598-024-76520-9
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
We herein disclosed an efficient multiphase Fenton-like catalytic system for oxidative degradation of chitosan. By utilizing Fe-MCM-41, featured with regular mesoporous structure and high specific surface area, the activation efficiency of H2O2 was significantly enhanced and the chitosan degradation efficiency proved by 28.1% higher than the conventional system using H2O2 alone. Under optimized conditions (5 g/L chitosan, 0.5 g/L Fe-MCM-41, 0.16 mol/L CH3COOH, 0.86 mol/L H2O2, 50 degrees C, 140 min), the viscosity reduction rate of chitosan reached an impressive 98.2%. Among the catalysts tested, Fe-MCM-41 with a loading factor of x = 0.12 demonstrated optimal degradation performance. After four recycles, the degradation efficiency maintained > 93.6%, demonstrating its excellent stability and recyclability for potential industrial applications. Kinetic studies provided further elucidation of the reaction mechanism, which indicated that the degradation process of chitosan followed a first-order kinetic model, with an apparent activation energy (E-a) of 48.91 kJ/mol. This novel and efficient strategy for chitosan degradation, addressed the challenges of catalyst recovery and secondary pollution typically associated with traditional Fenton systems, and posed broad application potential for polysaccharide material processing.
引用
收藏
页数:18
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