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Interfacial engineering-mediated S-Scheme heterojunction with dual-ion cycling for enhanced photo-Fenton degradation of levofloxacin using a magnetically recyclable MnFe2O4@MIL-101(Fe)catalyst 认领 引用
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作者 Xichen Mi Tingting Zhan +2 位作者 Xiaojing Zhou Na Ma Wei Dai 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2026年第8期96-108,共13页
The uniform pore size distribution and inherent particle inseparability of iron-based metal-organic frameworks(Fe-MOFs)have been shown to significantly hinder their light-harvesting capabilities and charge carrier sep... The uniform pore size distribution and inherent particle inseparability of iron-based metal-organic frameworks(Fe-MOFs)have been shown to significantly hinder their light-harvesting capabilities and charge carrier separation efficiency.These intrinsic limitations compromise catalyst recyclability and reaction kinetics in practical scenarios,thereby impeding their applicability in the degradation of antibiotic pollutants such as levofloxacin(LEV)in aquatic environments.Here,we report an S-type heterojunction photocatalyst,MnFe2O4@MIL-101(Fe),prepared via hydrothermal coupling of magnetic MnFe2O4 nanoparticles with MIL-101(Fe).The synergistic effect of Fe3+/Fe2+and Mn3+/Mn2+redox pairs,combined with the heterojunction interface and built-in electric field,significantly enhances visible-light-driven photo-Fenton activity.The catalyst degraded over 95%of LEV with a rate constant of 0.05056 min-1 and retained 87%activity after five cycles.LC-MS analysis revealed defluorination and demethylation pathways,while toxicity assessments confirmed lower LC50,mutagenicity,and developmental toxicity of intermediates,validating the environmental viability of the photo-Fenton process. 展开更多
关键词 MnFe 2 O 4 MIL-101(Fe) Levofloxacin Photo-Fenton S-scheme Electric field
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Online measurement and timely optimization of hydrogen peroxide concentration in photo-Fenton processes:Application of an Arduino device 认领 引用
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作者 Kevin U.Antela Davide Palma +3 位作者 Angel Morales Maria Luisa Cervera Debora Fabbri Alessandra Bianco Prevot 《Water Science and Engineering》 EI CAS CSCD 2026年第1期67-74,共8页
The scale-up of photocatalytic processes for pollutant removal from water involves several critical aspects,including timely analytical control and optimization of operational parameters to maximize efficiency while m... The scale-up of photocatalytic processes for pollutant removal from water involves several critical aspects,including timely analytical control and optimization of operational parameters to maximize efficiency while minimizing reagent consumption.In advanced oxidation processes,reagent use represents a major cost.Specifically,in photo-Fenton processes,excess hydrogen peroxide(H2O2)can hinder pollutant degradation kinetics,making precise dosing crucial.Automation of H2O2 concentration monitoring and dosing is therefore essential to the development of reliable,rapid,and cost-effective devices.This study investigated the role of H2O2 dosing in the photo-Fenton degradation of two emerging contaminants(paracetamol and caffeine).A custom Arduino-controlled automated device was employed for online colorimetric H2O2 measurements and dosing.The kinetics of substrate degradation,organic carbon mineralization,and H2O2 consumption were compared to determine the optimal H2O2 dosing strategy for maximizing process efficiency.The H2O2 consumption profile was found to be substrate-dependent.Caffeine degradation exhibited distinctive behavior,warranting preliminary analysis of its by-products.The device also enabled online dissolved oxygen measurements to explore potential relationships with H2O2 concentrations.The results revealed faster substrate and organic carbon removal when a stoichiometric H2O2 dose was added initially,whereas successive additions of smaller H2O2 doses reduced overall H2O2 consumption. 展开更多
关键词 Photo-Fenton Process optimization Online monitoring H2O2measurement H2O2dosing
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Fe-O-Bi efficient electron transfer channels and photo-Fenton synergy in S-scheme heterojunctions:Insights into interfacial interactions and ofloxacin degradation 认领 引用 被引量：2
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作者 Jiawei Liu Jun Shi Huiping Deng 《Green Energy & Environment》 SCIE EI CAS CSCD 2025年第7期1503-1518,共16页
Fenton method combined with light to accelerate the production of free radicals from H2O2 can achieve more efficient pollutant degradation.In this paper,a novel BiOI/FeWO4 S-scheme heterojunction photocatalyst was obt... Fenton method combined with light to accelerate the production of free radicals from H2O2 can achieve more efficient pollutant degradation.In this paper,a novel BiOI/FeWO4 S-scheme heterojunction photocatalyst was obtained by in situ synthesis,which can activate H2O2 and degrade the organic pollutant OFC(ofloxacin)under visible light.The S-scheme charge transfer mechanism was confirmed by XPS spectroscopy,in situ KPFM and theoretical calculation.The photogenerated electrons were transferred from FeWO4 to BiOI driven by the built-in electric field and band bending,which inhibited carrier recombination and facilitated the activation of H2O2.The BiFe-5/Vis/H2O2 system degraded OFC up to 96.4%in 60 min.This study provides new systematic insights into the activation of H2O2 by S-scheme heterojunctions,which is of great significance for the treatment of antibiotic wastewater. 展开更多
关键词 H2O2 BiOI/FeWO4 heterojunction Ofloxacin Photo-Fenton
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Boosting charge transfer at inorganic/organic S-scheme interface for photo-Fenton degradation of antibiotics and bacterial inactivation 认领 引用 被引量：2
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作者 Haotian Qin Yuxin Huang +2 位作者 Qiang Cheng Suding Yan Kai Wang 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2025年第5期106-117,共12页
Solar-driven Fenton-like reactions are promising strategies for degrading pharmaceutical wastewater to address environmental challenges and antibiotic pollution.However,its efficacy is limited by suboptimal light abso... Solar-driven Fenton-like reactions are promising strategies for degrading pharmaceutical wastewater to address environmental challenges and antibiotic pollution.However,its efficacy is limited by suboptimal light absorption efficiency,rapid charge recombination,and inadequate interfacial charge transfer.In this study,an inorganic/organic S-scheme photo-Fenton system of pseudobrookite/carbon nitride(FTOCN)was synthesized via a hydrothermally coupled calcination process for the effective purification of tetracycline antibiotics under visible-light irradiation.The optimized FTOCN-2 heterostructure exhibits a significantly enhanced TC degradation capacity of 90%within 60 min.The rate constant of FTOCN-2 is 1.6 and 5.2 times greater than those of FTO and CN,respectively.Furthermore,FTOCN exhibits high antibacterial efficacy,highlighting its potential application in the purification of natural water.Measurements via a range of analytical techniques,including Kelvin probe force microscopy,density functional theory calculations,in situ X-ray photoelectron spectroscopy,and femtosecond transient absorption spectroscopy,corroborate the S-scheme mechanism.This study provides a novel perspective for the development of photo-Fenton systems with S-scheme heterojunctions for water purification. 展开更多
关键词 Photo-Fenton reaction Inorganic/organic heterojunction Antibiotics degradation Bacterial inactivation S-scheme mechanism
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Ingenious construction of a magnetic-recyclable photo-Fenton catalyst ZnFe2O4@MIL-88A(Fe)and its adsorption-degradation activity toward levofloxacin 认领 引用 被引量：1
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作者 Xichen Mi Tingwei Wang +3 位作者 Yitong Chen Dan Cao Na Ma Wei Dai 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2025年第5期677-691,共15页
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 levoflo... 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 water.In this study,a magnetically detachable nano-photocatalyst(ZnFe2O4@MIL-88A(Fe))was synthesized using a simple two-step hydrothermal technique.The morphology and microstructure analyses showed that n-type ZnFe2O4catalyst particleswere efficiently assembled onto the surface of MIL-88A(Fe)crystal.Photocatalytic activity studies indicated that the ZnFe2O4@MIL-88A(Fe)plus H2O2exhibiting a significantly boosted photo-Fenton activity toward LEV at visible light irradiation,compared to the pure ZnFe2O4and MIL-88A(Fe),the degradation efficiency accordingly reached up to nearly 82%and 25%within 60 min.This excellent photocatalytic performance was ascribed to the synergistic effects of the heterogeneous structure of ZnFe2O4and MIL-88A(Fe),whereby the efficient separation of charge carriers in the catalytic system is mutually reinforced with the efficient reduction of Fe3+and Fe2+.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,etc.Additionally,the ZnFe2O4@MIL-88A(Fe)composite catalyst displayed significant stability and ease of separation,indicating potential for the photooxidative degradation of organic pollutants. 展开更多
关键词 ZnFe2O4 MIL-88A(Fe) Magnetism Photo-Fenton Levofloxacin
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Fenton及Photo-Fenton反应研究进展 认领 引用 被引量：102
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作者 张德莉 黄应平 +3 位作者 罗光富 刘德富 马万红 赵进才 《环境化学》 CAS 北大核心 2006年第2期121-127,共7页
Fenton反应自发现以来一直广泛用于不同的氧化反应．近年来,Fenton及Photo-Fenton作为一种新的有效的高级氧化技术应用于环境污染的处理领域．本文简要介绍了Fenton及Photo-Fenton反应的机理和应用在催化氧化领域中的研究进展．
关键词 Fenton Photo-Fenton 机理 应用
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磁性Fe_3O_4/石墨烯Photo-Fenton催化剂的制备及其催化活性 认领 引用 被引量：19
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作者 何光裕 张艳 +2 位作者 钱茂公 陈海群 汪信 《无机化学学报》 SCIE CAS CSCD 北大核心 2012年第11期2306-2312,共7页
采用共沉淀法制备磁性Fe3O4/GE(石墨烯)催化剂,实现Fe3O4纳米颗粒生长和氧化石墨烯还原同步进行,采用FTIR、XRD、TEM及低温氮吸附-脱附等对Fe3O4/GE纳米催化剂的物相、颗粒粒径及比表面积进行了表征。在H2O2存在条件下,以亚甲基蓝为目... 采用共沉淀法制备磁性Fe3O4/GE(石墨烯)催化剂,实现Fe3O4纳米颗粒生长和氧化石墨烯还原同步进行,采用FTIR、XRD、TEM及低温氮吸附-脱附等对Fe3O4/GE纳米催化剂的物相、颗粒粒径及比表面积进行了表征。在H2O2存在条件下,以亚甲基蓝为目标降解物,考察了在模拟太阳光下Fe3O4/GE的催化活性,当氧化石墨烯与Fe3O4的质量比为1∶10时,经过2 h催化反应,在pH=6条件下,对亚甲基蓝的降解率达到98.7%,经过10次循环使用后对染料溶液的降解率仍保持在95.7%以上,明显优于纯的Fe3O4。 展开更多
关键词 纳米Fe3O4/GE 磁分离 Photo-Fenton反应
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Photo-Fenton法降解水中新型污染物双氯芬酸及降解产物的毒性评价 认领 引用 被引量：24
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作者 于万禄 熊振湖 马华继 《环境科学学报》 CAS 北大核心 2009年第10期2070-2075,共6页
研究了photo-Fenton反应对非甾体抗炎药双氯芬酸的降解和矿化.同时,探讨了H2O2、Fe2+初始浓度、pH值等因素对photo-Fenton反应的影响,确定了最佳操作条件,并进行了各种氧化法的比较.结果表明,对于UV/H2O2/Fe2+反应系统下双氯芬酸的降解... 研究了photo-Fenton反应对非甾体抗炎药双氯芬酸的降解和矿化.同时,探讨了H2O2、Fe2+初始浓度、pH值等因素对photo-Fenton反应的影响,确定了最佳操作条件,并进行了各种氧化法的比较.结果表明,对于UV/H2O2/Fe2+反应系统下双氯芬酸的降解,其降解速率受到反应条件的强烈影响.双氯芬酸初始浓度为20mg·L-1时,适宜操作条件是pH值为5,初始FeSO4浓度为5mg·L-1,初始H2O2浓度为200mg·L-1.在最佳条件下,各种氧化法的降解能力趋势为UV/Fenton>UV/H2O2>Fenton>UV.由于反应中有中间产物的生成,双氯芬酸的矿化过程要长于降解过程,其生物毒性也是随着反应的进行先增大而后减小. 展开更多
关键词 双氯芬酸 photo-Fenton 降解与矿化 生物毒性 EC50
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2D/2D step-schemeα-Fe2O3/Bi2WO6 photocatalyst with efficient charge transfer for enhanced photo-Fenton catalytic activity 认领 引用 被引量：18
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作者 Wenliang Wang Wenli Zhao +2 位作者 Haochun Zhang Xincheng Dou Haifeng Shi 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2021年第1期97-106,共10页
Although the traditional Fenton reaction is considered an effective strategy for solving problems caused by environmental pollution,construction of an efficient photocatalytic system by coordinating the Fenton reactio... Although the traditional Fenton reaction is considered an effective strategy for solving problems caused by environmental pollution,construction of an efficient photocatalytic system by coordinating the Fenton reaction is challenging.In this study,2D/2D step-schemeα-Fe2O3/Bi2WO6(FO/BWO)heterostructure photo-Fenton catalysts were successfully fabricated by a facile hydrothermal method.The as-prepared materials were characterized by XRD,FT-IR,TEM,XPS,UV-vis DRS,PL,I-t,EIS,and BET analyses.Under visible light irradiation,FO/BWO exhibited remarkably high and stable photo-Fenton catalytic activity for the degradation of methyl blue(MB)at low concentrations of H2O2.It was noted that FO/BWO(0.5)displayed a significantly enhanced photo-Fenton catalytic activity,which was 11.06 and 3.29 times those of FO nanosheets and BWO nanosheets,respectively.The notably improved photo-Fenton catalytic activity of FO/BWO was mainly due to the combination of H2O2 and FO under light illumination and the presence of the 2D/2D S-scheme heterostructure,with the large contact surface,abundant active sites,and efficient separation rate of photogenerated carriers playing contributory roles.Additionally,a possible catalytic mechanism for the FO/BWO composite was preliminarily proposed via active species trapping experiments.In summary,this study provided new insights into the synthesis of an effectively heterogeneous 2D/2D S-scheme photo-Fenton catalyst for degradation of organic pollutants in wastewater. 展开更多
关键词 Bi2WO6 α-Fe2O3 S-scheme Photo-Fenton 2D photocatalyst
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Removal of citrate and hypophosphite binary components using Fenton,photo-Fenton and electro-Fenton processes 认领 引用 被引量：9
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作者 Yao-Hui Huang Hsiao-Ting Su Li-Way Lin 《Journal of Environmental Sciences》 SCIE EI CAS 2009年第1期35-40,共6页
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... 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. 展开更多
关键词 citrate hypophosphite wastewater advanced oxidation processes Fenton photo-Fenton electro-Fenton
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Singlet oxygen synergistic surface-adsorbed hydroxyl radicals for phenol degradation in CoP catalytic photo-Fenton 认领 引用 被引量：8
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作者 Haoran Yu Danxu Liu +5 位作者 Hengyi Wang Haishuang Yu Qingyun Yan Jiahui Ji Jinlong Zhang Mingyang Xing 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 2022年第10期2678-2689,共12页
In recent years,there have been numerous studies on Fenton or Fenton-like reactions mediated by nonfree radicals such as singlet oxygen(1O2);however,there are few studies on the synergistic effect of 1O2 and fre... In recent years,there have been numerous studies on Fenton or Fenton-like reactions mediated by nonfree radicals such as singlet oxygen(1O2);however,there are few studies on the synergistic effect of 1O2 and free radicals on the degradation of organic molecules,such as phenol in Fenton reaction.In this study,a cocatalyst,CoP,commonly used in photocatalysis was synthesized using a simple two-step method,and a CoP/Fe2+/AM1.5 system was constructed by introducing Fe2+and simulated sunlight(AM1.5)irradiation.The newly constructed CoP/Fe2+/AM1.5 system could effectively degrade various organic pollutants,including dyes,phenols,and antibiotics.Radical quenching experiments and electron paramagnetic resonance detection confirmed that there were three reactive oxygen species(ROS)in the CoP/Fe2+/AM1.5 system,including·OHads,·O2-,and 1O2.Further,combined with the liquid chromatogram of phenol,its intermediate products,and the fluorescence diagram of o-hydroxybenzoic acid,it can be concluded that a synergistic effect exists between 1O2 and the surface-adsorbed·OHads in the CoP/Fe2+/AM1.5 system.The controllable formation of surface 1O2 and·OHads was achieved through the oxidation(Co3+)and reduction(Pδ−)centers exposed on the CoP surface,and the synergistic effect between them results in phenol’s hydroxylation,ring-opening,and degradation.The study of this new mechanism provides a new perspective for revealing the surface interface reaction between ROS and organic pollutants. 展开更多
关键词 Surface hydroxyl radical Singlet oxygen Synergistic effect Hydroxylation Photo-Fenton
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Ordered mesoporous Fe/TiO_2 with light enhanced photo-Fenton activity 认领 引用 被引量：9
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作者 Zhenmin Xu Ru Zheng +2 位作者 Yao Chen Jian Zhu Zhenfeng Bian 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2019年第5期631-637,共7页
Ordered mesoporous Fe/TiO2 was prepared by an evaporation-induced self-assembly method. The iron ions were in situ embedded in the pore wall of the TiO2 framework. The catalyst has excellent light-assisted Fenton cata... Ordered mesoporous Fe/TiO2 was prepared by an evaporation-induced self-assembly method. The iron ions were in situ embedded in the pore wall of the TiO2 framework. The catalyst has excellent light-assisted Fenton catalytic performance under UV and visible light irradiation. X-ray diffraction and transmission electron microscopy results showed that the TiO2 samples have an ordered two-dimensional hexagonal pore structure and an anatase phase structure with high crystallinity. The ordered pore structure of the TiO2 photocatalyst with a large specific surface area is beneficial to mass transfer and light harvesting. Furthermore, iron ions can be controlled by embedding them into the TiO2 framework to prevent iron ion loss and inactivation. After five cycles, the reaction rate of the ordered mesoporous Fe/TiO2 remained unchanged, indicating that the material has stable performance and broad application prospects for the purification of environmental pollutants. 展开更多
关键词 Ordered mesoporous TiO2 Iron doping Photo-Fenton Photocatalysis
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Fenton/Photo-Fenton氧化与生物处理组合技术的应用研究进展 认领 引用 被引量：8
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作者 张红岩 王伟财 +1 位作者 吕荣湖 刘晓春 《化工进展》 CAS 北大核心 2008年第1期1-5,共5页
Fenton/Photo-Fenton与生物处理组合技术在处理受污染的水和土壤中具有广阔的应用前景。首先简明归纳了Fenton/Photo-Fenton作为预处理改善污染物可生化性的研究概况,指出通过改变氧化条件找到合适的氧化状态点是问题的关键。然后介绍了... Fenton/Photo-Fenton与生物处理组合技术在处理受污染的水和土壤中具有广阔的应用前景。首先简明归纳了Fenton/Photo-Fenton作为预处理改善污染物可生化性的研究概况,指出通过改变氧化条件找到合适的氧化状态点是问题的关键。然后介绍了Fenton/Photo-Fenton与生物处理组合技术的具体应用研究进展,主要是实验室规模研究,也包括几个中试应用的实例。最后,针对该组合技术的问题提出了今后的研究方向。 展开更多
关键词 Fenton Photo-Fenton 可生化性 生物处理 组合技术
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TiO_2/Schwertmannite nanocomposites as superior co-catalysts in heterogeneous photo-Fenton process 认领 引用 被引量：6
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作者 Yanping Zhu Chun Zeng +5 位作者 Runliang Zhu Yin Xu Xingyan Wang Huijun Zhou Jianxi Zhu Hongping He 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2019年第6期208-217,共10页
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 c... 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 costs.In this work,we developed novel photoFenton catalysts by simply milling commercially available TiO_2(P25)with Schwertmannite(Sh),a natural iron-oxyhydroxysulfate nanomineral.We 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 contaminants.SEM 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 systems.These 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 system.Besides,TiO_2/Sh had lower Fe dissolution as compared with Sh,and retained high catalytic stability after four repeated cycles.Above 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. 展开更多
关键词 Photo-Fenton reaction Semiconductor Schwertmannite Advanced oxidation
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Co-Fe quantum dots coupled with ultrathin g-C3N4 nanosheets as efficient and stable photo-Fenton catalysts 认领 引用 被引量：10
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作者 Jia-Yu Li Xin-Yu Wang +2 位作者 Jian Tian Xiao-Li Zhang Feng Shi 《Rare Metals》 SCIE EI CAS CSCD 2023年第6期1877-1887,共11页
The Fenton reaction has been widely used in the environmental remediation.However,the sharp decline of photo-Fenton catalysts activity under neutral conditions is still an urgent problem to be solved.This study report... The Fenton reaction has been widely used in the environmental remediation.However,the sharp decline of photo-Fenton catalysts activity under neutral conditions is still an urgent problem to be solved.This study reports a Co/Fe bimetallic oxide quantum dots-coupled g-C3N4nanosheets(CoFeO QDs/g-C3N4 NSs) composites with efficient degradation of organic pollutants under neutral conditions.Under the photo-Fenton condition,rhodamine B(RhB) degradation efficiency reached 98.32% within 90min for CoFeO QDs/g-C3N4 NSs composites.The formed heterojunction between CoFeO QDs and g-C3N4 NSs achieves enhanced charge transfer and efficient charge separation.Co-Fe bimetals make g-C3N4 NSs easier to excite the production of·OH by H2O2,achieving excellent degradation efficiency and cycle stability for organic pollutants in a wide pH range.Therefore,CoFeO QDs/g-C3N4NSs composites can be used as efficient and stable photoFenton catalysts to degrade organic contaminants in practical applications. 展开更多
关键词 Bimetallic oxide Quantum dots(QDs) gC3N4 Wastewater treatment Photo-Fenton
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Fenton及Photo-Fenton非均相体系降解有机污染物的研究进展 认领 引用 被引量：23
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作者 赵超 姜利荣 黄应平 《分析科学学报》 CAS 2007年第3期355-360,共6页
Fenton及photo-Fenton氧化法是一种有效的应用于环境污染物处理领域的高新氧化技术之一,对Fenton试剂的固定化可以减少铁离子的二次污染,提高催化能力和光利用率,及扩展pH等优势。本文综述了近年来Fenton及photo-Fenton非均相体系氧化... Fenton及photo-Fenton氧化法是一种有效的应用于环境污染物处理领域的高新氧化技术之一,对Fenton试剂的固定化可以减少铁离子的二次污染,提高催化能力和光利用率,及扩展pH等优势。本文综述了近年来Fenton及photo-Fenton非均相体系氧化降解有机污染物的研究状况。引用文献57篇。 展开更多
关键词 Fenton photo-Fenton 非均相 氧化降解
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敌百虫农药废水Photo-Fenton处理方法研究 认领 引用 被引量：6
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作者 陈心满 徐明芳 +1 位作者 彭延治 葛湘峰 《水资源保护》 CAS 北大核心 2006年第5期53-55,94,共3页
以含敌百虫有机磷农药的溶液为研究对象,采用Photo-Fenton试剂进行氧化降解处理,使其成功转化成为无机磷(PO43-)。实验表明,在pH值=3.0,c(Fe2+)=0.72 mmol/L,c(H2O2)=3 mmol/L的酸性条件下,Photo-Fenton处理方法对敌百虫废水有机磷转化... 以含敌百虫有机磷农药的溶液为研究对象,采用Photo-Fenton试剂进行氧化降解处理,使其成功转化成为无机磷(PO43-)。实验表明,在pH值=3.0,c(Fe2+)=0.72 mmol/L,c(H2O2)=3 mmol/L的酸性条件下,Photo-Fenton处理方法对敌百虫废水有机磷转化成无机磷的转化率可达70%,这可能是因为Fe3+络合物对光的吸收产生的配合基的作用以及产生羟基自由基(OH.)的速率加快。还对photo-Fenton处理有机磷农药的影响因素进行探讨。 展开更多
关键词 photo-Fenton 农药 敌百虫 光氧化作用
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Efficient visible light photo-Fenton-like degradation of organic pollutants using in situ surface-modified BiFeO_3 as a catalyst 认领 引用 被引量：12
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作者 Junjian An Lihua Zhu +1 位作者 Yingying Zhang Heqing Tang 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2013年第6期1213-1225,共13页
The visible light photo-Fenton-like catalytic performance of BiFeO3 nanoparticles was investigated using Methyl Violet （MV）, Rhodamine B （RhB） and phenol as probes. Under optimum conditions, the pseudo first-order... The visible light photo-Fenton-like catalytic performance of BiFeO3 nanoparticles was investigated using Methyl Violet （MV）, Rhodamine B （RhB） and phenol as probes. Under optimum conditions, the pseudo first-order rate constant （k） was determined to be 2.21 × 10^-2, 5.56 × 10^-2 and 2.01 × 10^-2 min〈 for the degradation of MV （30 μmol/L）, RhB （10 μmol/L） and phenol （3 mmol/L）, respectively, in the BiFeO3-H202-visible light （Vis） system. The introduction of visible light irradiation increased the k values of MV, RhB and phenol degradation 3.47, 1.95 and 2.07 times in comparison with those in dark. Generally, the k values in the BiFeO3- H202-Vis system were accelerated by increasing BiFeO3 load and H202 concentration, but decreased with increasing initial pollutant concentration. To further enhance the degradation of pollutants at high concentrations, BiFeO3 was modified with the addition of surface modifiers. The addition of ethylenediamineteraacetic acid （EDTA, 0.4 mmol/L） increased the k value of MV degradation （60 μmol/L） from 1.01 × 10.2 min^-1 in the BiFeO3-H202-Vis system to 1.30 min^-1 in the EDTA-BiFeO3-H2O2-Vis system by a factor of 128. This suggests that in situ surface modification can enable BiFeO3 nano-particles to be a promising visible light photo-Fenton-like catalyst for the degradation of organic pollutants. 展开更多
关键词 nanoscale BiFeO3 visible light photo-Fenton-like catalysis degradation surface modification
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Degradation of Reactive Yellow 86 with photo-Fenton process driven by solar light 认领 引用 被引量：4
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作者 Hideyuki Katsumata Syunya Koike +2 位作者 Satoshi Kaneco Tohru Suzuki Kiyohisa Ohta 《Journal of Environmental Sciences》 SCIE EI CAS 2010年第9期1455-1461,共7页
The decolorization of Reactive Yellow 86 （RY 86）, one of reactive azo dyes, was investigated in the presence of Fenton reagent under solar light irradiation. The decolorization rate was strongly influenced by pH, in... The decolorization of Reactive Yellow 86 （RY 86）, one of reactive azo dyes, was investigated in the presence of Fenton reagent under solar light irradiation. The decolorization rate was strongly influenced by pH, initial concentrations of H202 and Fe（II）, and so on. An initial concentration of 40 mg/L was decolored more than 90% after 20 min under optimum conditions. The activation energy of the solar photo-Fenton reaction was 1.50 kJ/mol for RY 86 in the temperature range of 10-60℃. In the kinetic study, the rate constant of RY 86 with OH- radicals could be estimated to be 1.7 × 10^10 L/（mol.sec）. The decolorization efficiency of RY 86 under solar light irradiation was comparable to the artificial light irradiation. The decrease of TOC as a result of mineralization of RY 86 was observed during photo-Fenton process. The rate of RY 86 mineralization was about 83% under UV irradiation after 24 hr. The formation of chloride, sulfate, nitrate and ammonium ions as end-products was observed during the photocatalytic process. The decomposition of RY 86 gave two kinds of intermediate products. The degradation mechanism of RY 86 was proposed on the base of the identified intermediates. 展开更多
关键词 reactive azo dye photo-Fenton reaction solar light irradiation decolorization mineralization
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Coaxial Fe2O3/TiO2nanotubes for enhanced photo-Fenton degradation of electron-deficient organic contaminant 认领 引用 被引量：4
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作者 Yue Li Dan-Dan Cheng +1 位作者 Yan Luo Li-Xia Yang 《Rare Metals》 SCIE EI CAS CSCD 2021年第12期3543-3553,共11页
Coaxial Fe2O3/TiO2nanotubes(Fe2O3/TiO2NTs)were prepared by two anodic oxidation processes.The synthesized Fe2O3/TiO2NTs catalysts showed high photocatalytic activity in heterogeneous photo-F... Coaxial Fe2O3/TiO2nanotubes(Fe2O3/TiO2NTs)were prepared by two anodic oxidation processes.The synthesized Fe2O3/TiO2NTs catalysts showed high photocatalytic activity in heterogeneous photo-Fenton system.With the help of Fe2O3/TiO2NTs,4-nitrophenol(10 mg·L-1,50 ml),a typical electron-deficient organic contaminant,can be completely removed by adding only0.4 mmol·L-1of H2O2under irradiation.Investigation results clarify that the calculated position of Fe2O3/TiO2NTs valence band is at 2.944 eV,its potential is higher than the potential of OH~-/·OH(2.800 eV),thereby ensuring the generation of·OH.Meanwhile,the transformation of photogenerated electrons from the conduction band of TiO2to Fe2O3accelerates the reduction of Fe3+to Fe2+.The unstable Fe2+can be oxidized by H2O2to produce high yields of·OH.Therefore,both the coaxial heterojunction and fast Fe2+/Fe3+conversion provide abundant·OH to effective attack the electron-deficient benzene ring passivated by the nitro group.Thus,surface-catalyzed degradation of 4-nitrophenol can be carried out step by step.This work contributes a detailed understanding of charge transfer in semiconductor composites and degradation of organic contaminants. 展开更多
关键词 Fe2O3 TiO2 Coaxial Electron Deficient organic contaminant Photo-Fenton catalysis
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