Abstract
The present study reported fabrication of novel carbon quantum dots-MnFe2O4@ZIF-8(CQDs-MFO@ZIF-8)by using co-precipitation hydrothermal method for activation of peroxydisulfate(PDS)to degrade bisphenol A(BPA),one of important emerging organic pollutants in water environment.CQDs-MFO@ZIF-8 served as a highly efficient thermal activated PDS catalyst with high catalytic degradation efficiency,reusability and stability.The catalyst achieved almost completely removal of 20.0 mg/L BPA within 5.0 min,and the degradation efficiency remained higher than 83％after 5 consecutive cycles.Free radicals(·OH,SO4·-and·O2-)and non-free radicals(1O2)were generated in the thermal PDS-activation system,in which singlet oxygen(1O2)played a dominant role in the degradation of BPA.The potential toxicity of BPA degradation intermediates was analyzed upon the culture of E.coli and Chlorella sorokiniana by using Ecological Structure-Activity Relationship Model(ECOSAR)program.The catalytic performances of BPA degradation by CQDs-MFO@ZIF-8 were evaluated for treatment of different practical water samples to further verify the feasibility of practical applications.This study provides proof-in-concept demonstration of new nanomaterials for enhanced catalytic water decontamination.
基金项目
国家自然科学基金(52270074)
国家自然科学基金(52170039)
国家自然科学基金(U22A20241)
国家重点研发计划(2022YFE0135700)
黑龙江省自然科学基金(LH2021E117)
University Nursing Program for Young Scholars with Creative Talents in Heilongjiang Province(UNPYSCT-2020068)
万方数据