Zn/Fe bimetallic modified Spartina alterniflora-derived biochar heterostructure with superior catalytic performance for the degradation of malachite green  

作　　者：Hua Jing Lili Ji Zilong Li Zhen Wang Ran Li Kaixuan Ju 

机构地区：[1]Ocean College,Zhejiang University,Zhoushan,Zhejiang 310058,China [2]National Marine Facilities Aquaculture Engineering Technology Research Center,Zhejiang Ocean University,Zhoushan,Zhejiang 316022,China [3]Zhejiang Lichen New Material Technology Co.,Ltd,Shaoxing 313100,China

出　　处：《Biochar》2023年第1期506-518,共13页生物炭（英文）

基　　金：Fundamental Research Funds for Zhejiang Provincial Universities and Research Institutes(No.2021J004);Scientific Research Fund of Zhejiang Provincial Education Department(No.Y202044721);Integration and demonstration project of key technologies for resource utilization of tuff stone powder and comprehensive treatment of contaminated soil(No.K20221027).

摘　　要：In this study,the synchronous magnetized carbonization method was utilized for preparing photocatalysis ZnO-Fe@SC heterostructure,which exhibited degradation efficiency 99.14%(60 min)for malachite green(200 mg/L)and could still maintain good performance after 5 cycles.The prepared ZnO-Fe@SC was analyzed using UV-Vis DRS,PL,SEM,TEM,BET,FTIR,XPS and VSM,and LC-MS for degradation products.The results indicate that photocatalyst has favorable magnetic properties,chemical stability and low charge carriers(e^(−)/h^(+))recombination rate.The modification of bimetals enables the composite photocatalyst to enhance the intensity of photogenerated electron transition.Moreover,quenching experiment revealed that the photo-generated holes(h^(+))and superoxide radicals(·O_(2)^(−))were the dominant active species during the photocatalytic process,which degraded malachite green into small molecules by demethylation,deamination,ring-opening reactions as deducted from LC-MS analysis.ZnO-Fe@SC was prepared using a green,safe,low cost and operable synthetic method,which has a broad market potential in the field of environmental remediation.

关 键 词：Bimetallic heterostructure NANO-ZNO Green synthesis Photocatalytic degradation 

分 类 号：O643.36[理学—物理化学]