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Ingenious construction of a magnetic-recyclable photo-fenton catalyst ZnFe_(2)O_(4)@MIL-88A(Fe)and its adsorption-degradation activity toward levofloxacin

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Journal of Environmental Sciences 2025年第5期151卷 677-691页

作者： Xichen Mi Tingwei Wang Yitong Chen Dan Cao Na Ma Wei Dai Key Laboratory of the Ministry of Education for Advanced Catalysis Materials College of Chemistry and Materials ScienceZhejiang Normal UniversityJinhua 321004China Jinhua Customs Comprehensive Technology Service Center Jinhua 321004China College of Geography and Environmental Sciences Zhejiang Normal UniversityJinhua 321004China

Monotonic pore size and particles inseparability of metal-organic frameworks(MOFs)caused serious effects on its light absorption ability and charge separation,restricting its application for antibiotic such as levofloxacin(LEV)degradation in *** this study,a magnetically detachable nano-photocatalyst(ZnFe_(2)O_(4)@MIL-88A(Fe))was synthesized using a simple two-step hydrothermal *** morphology and microstructure analyses showed that n-type ZnFe_(2)O_(4)catalyst particleswere efficiently assembled onto the surface of MIL-88A(Fe)*** activity studies indicated that the ZnFe_(2)O_(4)@MIL-88A(Fe)plus H_(2)O_(2)exhibiting a significantly boosted photo-fenton activity toward LEV at visible light irradiation,compared to the pure ZnFe_(2)O_(4)and MIL-88A(Fe),the degradation efficiency accordingly reached up to nearly 82%and 25%within 60 *** excellent photocatalytic performance was ascribed to the synergistic effects of the heterogeneous structure of ZnFe_(2)O_(4)and MIL-88A(Fe),whereby the efficient separation of charge carriers in the catalytic system is mutually reinforced with the efficient reduction of Fe^(3+)and Fe^(2+).Meanwhile,the degradationmechanism and intermediates of LEV during the photo-fenton reaction process were also studied in depth through free radical burst,electron paramagnetic resonance,and mass spectrometry analyses,***,the ZnFe_(2)O_(4)@MIL-88A(Fe)composite catalyst displayed significant stability and ease of separation,indicating potential for the photooxidative degradation of organic pollutants.

关键词： ZnFe_(2)O_(4) MIL-88A(Fe) Magnetism photo-fenton Levofloxacin

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Experimental and theoretical investigations of the photoelectrochemical and photo-fenton properties of Co-doped FeOCl

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Chinese Physics B 2023年第9期32卷 427-435页

作者：马金环魏智强丁梅杰赵继威路承功 School of Science Lanzhou University of TechnologyLanzhou 730050China State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals Lanzhou University of TechnologyLanzhou 730050China

For the first time,two-dimensional FeOCl(Fe_(1-x)Co_(x)OCl)doped with Co was successfully applied to the photocatalytic and photo-fenton degradation of Rhodamine B(RhB).The photocatalytic and photo-fenton experiments showed that the degradation rates of RhB by Fe0.94Co0.06OCl are 82.6%and 98.2%within 50 min under neutral solution,room temperature and visible *** inclusion of Co resulted in lattice imperfections on the surface of Fe OCl,which was advantageous for the photogenerated electron-hole pair separation efficiency(consistent with the density functional theory calculation).Moreover,the RhB removal rate decreased from 98%to 82%during five successive cycles,showing good structural ***,based on the radical capture experiment,a potential mechanism for RhB degradation by Fe_(1-x)Co_(x)OCl catalyst was *** idea of a synergistic mechanism for Fe_(1-x)Co_(x)OCl also offers a fresh concept for catalysts used in doping modification.

关键词： Co doped FeOCl photo-fenton photocatalytic DFT calculations

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Co-Fe quantum dots coupled with ultrathin g-C_(3)N_(4) nanosheets as efficient and stable photo-fenton catalysts

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Rare Metals 2023年第6期42卷 1877-1887页

作者： Jia-Yu Li Xin-Yu Wang Jian Tian Xiao-Li Zhang Feng Shi School of Materials Science and Engineering Shandong University of Science and TechnologyQingdao266590China School of Materials Science and Engineering Qilu University of Technology(Shandong Academy of Sciences)Jinan250353China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou450001China

The fenton reaction has been widely used in the environmental ***,the sharp decline of photo-fenton catalysts activity under neutral conditions is still an urgent problem to be *** study reports a Co/Fe bimetallic oxide quantum dots-coupled g-C_(3)N_(4)nanosheets(CoFeO QDs/g-C_(3)N_(4) NSs) composites with efficient degradation of organic pollutants under neutral *** the photo-fenton condition,rhodamine B(RhB) degradation efficiency reached 98.32% within 90min for CoFeO QDs/g-C_(3)N_(4) NSs *** formed heterojunction between CoFeO QDs and g-C_(3)N_(4) NSs achieves enhanced charge transfer and efficient charge ***-Fe bimetals make g-C_(3)N_(4) NSs easier to excite the production of·OH by H_(2)O_(2),achieving excellent degradation efficiency and cycle stability for organic pollutants in a wide pH ***,CoFeO QDs/g-C_(3)N_(4)NSs composites can be used as efficient and stable photofenton catalysts to degrade organic contaminants in practical applications.

关键词： Bimetallic oxide Quantum dots(QDs) gC_(3)N_(4) Wastewater treatment photo-fenton

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Ultralow-Energy-Barrier H_(2)O_(2)Dissociation on Coordinatively Unsaturated Metal Centers in Binary Ce-Fe Prussian Blue Analogue for Efficient and Stable photo-fenton Catalysis

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Energy & Environmental Materials 2023年第6期6卷 427-435页

作者： Wenting Zheng Hui Guo Changqing Zhu Cailiang Yue Wenlei Zhu Fuqiang Liu Zhaoxu Chen State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China Institute of Theoretical and Computational Chemistry Key Laboratory of Mesoscopic Chemistry of MOESchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210023China

The low intrinsic activity of fenton catalytic site and high demand for light-energy input inhibit the organic-pollution control efficiency of photo-fenton ***,through structural design with density functional theory(DFT)calculations,Ce is predicted to enable the construction of coordinatively unsaturated metal centers(CUCs)in Prussian blue analogue(PBA),which can strongly adsorb H_(2)O_(2)and donate sufficient electrons for directly splitting the O-O bond to *** a substitution-co-assembly strategy,binary Ce-Fe PBA is then prepared,which rapidly degrades sulfamethoxazole with the pseudo-first-order kinetic rate constant exceeding reported values by 1-2 orders of ***,the photogenerated electrons reduce Fe(Ⅲ)and Ce(Ⅳ)to promote the metal valence cycle in CUCs and make sulfamethoxazole degradation efficiency only lose 6.04%in 5 ***,by introducing rare earth metals into transition metal-organic frameworks,this work guides the whole process for highly active CUCs from design and construction to mechanism exploration with DFT calculations,enabling ultrafast and stable photo-fenton catalysis.

关键词： Ce substitution coordinatively unsaturated metal centers photo-fenton Prussian blue analogue

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Experimental and computational assessment of 1,4-Dioxane degradation in a photo-fenton reactive ceramic membrane filtration process

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Frontiers of Environmental Science & Engineering 2021年第5期15卷 213-225页

作者： Shan Xue Shaobin Sun Weihua Qing Taobo Huang Wen Liu Changqing Liu Hong Yao Wen Zhang School of Environmental and Municipal Engineering Qingdao University of TechnologyQingdao266033China Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard Department of Municipal and Environmental EngineeringSchool of Civil EngineeringBeijing Jiaotong UniversityBeijing100044China John A.Reif Jr.Department of Civil and Environmental EngineeringNew Jersey Institute of TechnologyNewarkNJ07102USA College of Environmental Sciences and Engineering Peking UniversityKey Laboratory of Water and Sediment Sciences(Ministry of Education)Beijing100871China

The present study evaluated a photo-fenton reactive membrane that achieved enhanced 1,4-Dioxane removal *** a common organic solvent and stabilizer,1,4-Dioxane is widely used in a variety of industrial products and poses negative environmental and health *** membrane was prepared by covalently coating photocatalyst of goethite(α-FeOOH)on a ceramic porous membrane as we reported *** effects of UV irradiation,H_(2)O_(2)and catalyst on the removal efficiency of 1,4-Dioxane in batch reactors were first evaluated for optimized reaction conditions,followed by a systematical investigation of 1,4-Dioxane removal in the photo-fenton membrane filtration *** optimized conditions,the 1,4-Dioxane removal rate reached up to 16%with combination of 2 mmol/L H_(2)O_(2)and UV365 irradiation(2000µW/cm^(2))when the feed water was filtered by the photo-fenton reactive membrane at a hydraulic retention time of 6 *** removal efficiency and apparent quantum yield(AQY)were both enhanced in the filtration compared to the batch mode of the same photo-fenton ***,the proposed degradation pathways were analyzed by density functional theory(DFT)calculations,which provided a new insight into the degradation mechanisms of 1,4-Dioxane in photo-fenton reactions on the functionalized ceramic membrane.

关键词： photo-fenton Ceramic membrane 1,4-Dioxane Goethite

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TiO_2/Schwertmannite nanocomposites as superior co-catalysts in heterogeneous photo-fenton process

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Journal of Environmental Sciences 2019年第6期31卷 208-217页

作者： Yanping Zhu Chun Zeng Runliang Zhu Yin Xu Xingyan Wang Huijun Zhou Jianxi Zhu Hongping He CAS Key Laboratory of Mineralogy and Metallogeny Guangdong Provincial Key Laboratory of Mineral Physics and Material Research and Development Guangzhou Institute of Geochemistry Chinese Academy of Sciences University of Chinese Academy of Sciences School of Environmental Science and Technology Xiangtan University

The heterogeneous photo-fenton reaction is an effective technique in combating organic contaminants for both soil and water remediation,and extensive studies have focused on enhancing its efficiency and reducing its *** this work,we developed novel photofenton catalysts by simply milling commercially available TiO_2(P25)with Schwertmannite(Sh),a natural iron-oxyhydroxysulfate *** expect that the photo-generated electrons from TiO_2could continuously migrate to Sh,which then could enhance the separation of electron-hole pairs on TiO_2and accelerate the reduction of Fe(III)to Fe(II)on Sh,leading to high degradation efficiency of the target organic *** and TEM results showed the distribution of TiO_2on Sh surface for the nanocomposites(TiO_2/Sh).Under simulated sunlight irradiation,the much higher content of Fe(II)was determined on TiO_2/Sh than on Sh via a common method in the iron ore,and the consumption of H_2O_2and the production of·OH were more significant in the TiO_2/Sh system than those in the TiO_2and Sh *** results well support our hypothesis that the photo-generated electrons could migrate from TiO_2to Sh on the composites,and can also explain the much higher degradation efficiency of Rhodamine B(RhB)in the TiO_2/Sh ***,TiO_2/Sh had lower Fe dissolution as compared with Sh,and retained high catalytic stability after four repeated *** merits of the TiO_2/Sh composites,in combining with their simple synthesis method and low-cost property,indicated that they should have promising applications as heterogeneous photo-fenton catalysts.

关键词： photo-fenton reaction Semiconductor Schwertmannite Advanced oxidation

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A direct Z-scheme 0Dα-Fe_(2)O_(3)/TiO_(2)heterojunction for enhanced photo-fenton activity with low H_(2)O_(2)consumption

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Chinese Chemical Letters 2024年第12期35卷 334-339页

作者： Cailiang Yue Nan Sun Yixing Qiu Linlin Zhu Zhiling Du Fuqiang Liu State Key Laboratory of Pollution and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China

The insufficient F(Ⅲ)/Fe(Ⅱ)cycling rate resulted from high combination of photogenerated carriers severely hinders the photo-fenton *** this work,0 dimensionalα-Fe_(2)O_(3)nanoclusters decorated Ti O_(2)heterojunction(FT-x)was prepared via in-situ phase transformation ***-200 exhibited the optimal photo-fenton activity for 2,4-dichlorophenol degradation with the kinetic rate constant reaching1.0806 min^(-1)under low H_(2)O_(2)dosage(1 mmol/L),which was 126.1 and 202.8 times higher than that of Ti O_(2)andα-Fe_(2)O_(3).Radical quenching experiments and electron spin resonance spectra proved that·OH was the leading reactive *** enhanced photo-fenton activity was attributed to the accelerated F(III)/Fe(II)cycling rate induced by the direct Z-Scheme charge transfer *** from the abundant·OH production,the dechlorinate ratios and mineralization ratios of multiple chlorophenol pollutants(2,4-dichlorophenol,4-chlorophenol,2,4,6-trichlorophenol)all exceeded 98%.The biotoxicity of chlorophenol wastewater was greatly reduced after the treatment by Light/H_(2)O_(2)/FT-200 ***,this work constructed a low-cost and highly efficient photo-fenton system for refractory organic wastewater treatment.

关键词： photo-fenton Z-scheme heterojunction Chlorophenol α-Fe_(2)O_(3) TiO_(2)

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Removal of citrate and hypophosphite binary components using fenton,photo-fenton and electro-fenton processes

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Journal of Environmental Sciences 2009年第1期21卷 35-40页

作者： Yao-Hui Huang Hsiao-Ting Su Li-Way Lin Department of Chemical Engineering "National" Cheng Kung University Tainan 701 Taiwan China. Sustainable Environment Research Center Tainan 701 Taiwan China

Both citrate and hypophosphite in aqueous solution were degraded by advanced oxidation processes （Fe^2＋/H2O2, UV/Fe^2＋/H2O2, and electrolysis/Fe^2＋/H2O2） in this study. Comparison of these techniques in oxidation efficiency was undertaken. It was found that fenton process could not completely degrade citrate in the presence of hypophosphite since it caused a series inhibition. Therefore, UV light （photo-fenton） or electron current （electro-fenton） was applied to improve the degradation efficiency of the fenton process. Results showed that both photo-fenton and electro-fenton processes could overcome the inhibition of hypophosphite, especially the electro-fenton.

关键词： citrate hypophosphite wastewater advanced oxidation processes fenton photo-fenton electro-fenton

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Evidence against hydroxyl radical mechanism in photo-fenton degradation of p-chlorophenol

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Journal of Environmental Sciences 2006年第2期18卷 388-391页

作者： CHEN Lin ZHOU Ming-hua LEI Le-cheng Institute of Environmental Engineering Zhejiang University Hangzhou 310027 China Institute of Environmental Engineering and Science Hangzhou Dianzi University Hangzhou 310018 China

This paper provides evidence for the degradation of organic pollutant by the photo-fenton complex mechanism. Both the complex oxidation and HO. oxidation mechanisms were verified by p-chlorophenol degradation, UV/Vis spectra anaylsis, and quantum yield. The hydroxyl radical involved in the photo-fenton process can also be generated from the decomposition of H2O2, photolysis of Fe^3＋ and degradation of hydrated Fe（Ⅵ）-complex, excepting the traditional fenton reaction.

关键词： photo-fenton p-chlorophenol mechanism

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Superhydrophilic membrane with photo-fenton self-cleaning property for effective microalgae anti-fouling

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Chinese Chemical Letters 2023年第8期34卷 444-448页

作者： Yunhua Wang Zhengqi Jiao Wenlong Li Sen Zeng Jiliang Deng Miao Wang Lei Ren Department of Biomaterials College of MaterialsKey Laboratory of Biomedical Engineering of Fujian Province University/Research Center of Biomedical Engineering of XiamenXiamen UniversityXiamen 361005China State Key Laboratory of Physical Chemistry of Solid Surfaces College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005China

Membrane filtration is one of the effective approaches to harvest microalgae for industrial biofuel ***,during the filtration process,microalgae cells and extracellular organic matter(EOM)will deposit on the membrane surface leading to reversible membrane fouling that can be removed by physical *** hydrophobic EOM is adsorbed on the membrane surface or inside pores,it will build up a gel layer,causing irreversible membrane *** fouling can only be removed using chemical methods that will decrease membrane lifespan and increase operational ***,we introduce a versatile superhydrophilic membrane with photo-fenton self-cleaning property,which can prevent the reversible fouling and remove the irreversible *** acid(TA)and 3-aminopropyltriethoxysilane(APTES)were co-deposited on the polyvinylidene fluoride(PVDF)membrane via Schiff base and Michael addition reactions,andβ-FeOOH nanorods were inlaid on the membrane surface by in situ *** water contact angle of the modified membrane is reduced from 120°to 0°Under 60 min visible light,the hydroxyl radical(·OH)generated by the photo-fenton reaction degraded the irreversible fouling that blocked membrane *** irreversible fouling rates of modified membrane was reduced from 39.57%to 3.26%,compared with the original *** harvesting results illustrated that the membrane has a high flux recovery rate(FRR)of 98.2%,showed excellent passive antifouling and active antifouling *** believe this work will spark a novel platform for optimizing energy-efficient microalgae harvesting separation membrane *** addition,this method of anti-fouling filtration for microorganisms can be extended to the industrial production of various bioenergy sources and will have very promising practical applications.

关键词： Membrane filtration Microalgae harvesting Irreversible membrane fouling photo-fenton Superhydrophilic

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