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Oxygen vacancy boosting Fenton reaction in bone scaffold towards fighting bacterial infection
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作者 Cijun Shuai Xiaoxin Shi +2 位作者 Feng Yang Haifeng Tian Pei Feng 《International Journal of Extreme Manufacturing》 SCIE EI CAS CSCD 2024年第1期296-311,共16页
Bacterial infection is a major issue after artificial bone transplantation due to the absence of antibacterial function of bone scaffold,which seriously causes the transplant failure and even amputation in severe case... Bacterial infection is a major issue after artificial bone transplantation due to the absence of antibacterial function of bone scaffold,which seriously causes the transplant failure and even amputation in severe cases.In this study,oxygen vacancy(OV)defects Fe-doped Ti O2(OV-FeTiO2)nanoparticles were synthesized by nano TiO2and Fe3O4via high-energy ball milling,which was then incorporated into polycaprolactone/polyglycolic acid(PCLGA)biodegradable polymer matrix to construct composite bone scaffold with good antibacterial activities by selective laser sintering.The results indicated that OV defects were introduced into the core/shell-structured OV-FeTiO2nanoparticles through multiple welding and breaking during the high-energy ball milling,which facilitated the adsorption of hydrogen peroxide(H2O2)in the bacterial infection microenvironment at the bone transplant site.The accumulated H2O2could amplify the Fenton reaction efficiency to induce more hydroxyl radicals(·OH),thereby resulting in more bacterial deaths through·OH-mediated oxidative damage.This antibacterial strategy had more effective broad-spectrum antibacterial properties against Gram-negative Escherichia coli(E.coli)and Gram-positive Staphylococcus aureus(S.aureus).In addition,the PCLGA/OV-FeTiO2scaffold possessed mechanical properties that match those of human cancellous bone and good biocompatibility including cell attachment,proliferation and osteogenic differentiation. 展开更多
关键词 bacterial infection bone scaffold selective laser sintering fenton reaction antibacterial properties
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Magnetic field assisted Fenton reactions for the enhanced degradation of methyl blue 被引量:2
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作者 Xiao Long Hao Lu Yi Zou Guang Sheng Zhang Yi Bo Zhang 《Chinese Chemical Letters》 SCIE CAS CSCD 2009年第1期99-101,共3页
Magnetic field was tentatively introduced into Fenton reactions system for the degradation and discoloration of methyl blue as the represent of organic chemical dye, which was a bio-refractory organic pollutant in ind... Magnetic field was tentatively introduced into Fenton reactions system for the degradation and discoloration of methyl blue as the represent of organic chemical dye, which was a bio-refractory organic pollutant in industry wastewater. It was found that under optimal Fenton reaction conditions, with the assistant of magnetic field in Fenton reactions, the degradation rate of methyl blue, the decomposition rate of H2O2 and the conversion rate of Fe^2+ were accelerated, the extent of them would be improved by the increase of magnetic field intensity. Meanwhile, the mineralization of methyl blue (CODer) was improved by over 10% with magnetic field. 展开更多
关键词 Magnetic field fenton reactions Methyl blue DYE
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Different Heterogeneous Fenton Reaction Based on Foam Carrier Loaded with Photocatalysts
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作者 邱珊 LI Guangming +1 位作者 DENG Fengxia MA Fang 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2018年第1期85-90,共6页
The effect of heterogeneous Fenton reaction was studied on methylene blue(MB) and Nitrosomonas europaea(N. europaea) cells. Four Fenton systems were prepared and compared with each other, including Nickel Foam(NF... The effect of heterogeneous Fenton reaction was studied on methylene blue(MB) and Nitrosomonas europaea(N. europaea) cells. Four Fenton systems were prepared and compared with each other, including Nickel Foam(NF)/TiO2, NF/Bi2WO6, Ceramic foam(CM)/TiO2, and CM/Bi2WO6. The order of effect of fenton reaction ranked as NF/TiO2〉CM/TiO2〉NF/Bi2WO6〉CM/Bi2WO6. In acid or alkaline solution, the removal efficiency also decreased compared with neutral solution. With lower p H values, the nanoparticles were easier to break off from NF skeleton. Thus the synergetic effect of photocatalysis and fenton reaction can not take action. As for CM skeleton, the bond –Si-O-can bind with TiO2 or Bi2WO6. The membrane fluidity was used as an indicating parameter. After being treated by Fenton reaction, N. europaea surface was rougher than the native bacterium and the bulges on cell surface became irregular, which is attributed to change of lipopolysaccharide patches. Polarization of N. europaea cell membrane in acid medium increased more obvious than alkaline medium. 展开更多
关键词 fenton reaction N europaea POLARIZATION DEGRADATION MEMBRANE
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A Novel and Convenient Assay for the Determination of OH Produced by Fenton Reaction
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作者 Zhuo Bin YUAN Zhi Ru MA(Department of Chendstry, Graduate School, USTC, Academia Sinica, Beijing 100039) 《Chinese Chemical Letters》 SCIE CAS CSCD 1998年第6期569-571,共3页
A novel, simple and convenient method for the determination of hydroxyl radicals isestablished. Hydroxyl radicals produced by Fenton reaction is trapped by spin trap reagent phenyl-t-butyl nitrone (PBN), and the free ... A novel, simple and convenient method for the determination of hydroxyl radicals isestablished. Hydroxyl radicals produced by Fenton reaction is trapped by spin trap reagent phenyl-t-butyl nitrone (PBN), and the free radical adduct of PBN can be detected by single sweeposcillopolarography, with its second order derivative cathodic wave at -0.52V vs SCE. Theoptimum experimental conditions for the detemination is discussed, and the scavenging effects ofsome compounds on OH was also studied. 展开更多
关键词 hydroxyl radicals fenton reaction spin trap reagent PBN electrochemical method
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Mechanism of chemiluminescence in Fenton reaction
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作者 Irina Pavlovna Ivanova Svetlana Vladimirovna Trofimova +3 位作者 Igor Mihailovich Piskarev Natalia Alekseevna Aristova Olga Evgenevna Burhina Oksana Olegovna Soshnikova 《Journal of Biophysical Chemistry》 2012年第1期88-100,共13页
A scheme of the processes in Fenton solution with various substances is offered, and the channels of light formation registered by the luminometer are analyzed. Under the proposed scheme we discuss the possibilities o... A scheme of the processes in Fenton solution with various substances is offered, and the channels of light formation registered by the luminometer are analyzed. Under the proposed scheme we discuss the possibilities of studying the properties of antioxidants and prooxidants. Oxidation of alanine, albumin and sodium oxalate have been taken as an example. The properties of ascorbic acid and the mechanism of display of its oxidant and prooxidant properties are analyzed herewith. Methodical questions of the chemiluminescence research in Fenton solution such as the selection of reagents concentration, water preparation and the effect of the background radiation have been considered in this study as well. 展开更多
关键词 fenton reaction CHEMILUMINESCENCE OXIDATION Scheme ANTIOXIDANT PROOXIDANT
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H_(2)O_(2) actuated molybdenum oxide nanodots:Multi-enzyme-like activities,leverage of Fenton reaction,and dual-mode sensitive detection of alendronate sodium 被引量:1
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作者 Siqi Wang Yao Jin +5 位作者 Wenhui Ai Xiufeng Wang Zhiqing Zhang Ting Zhou Guodong Zhang Fang Wang 《Nano Research》 SCIE EI CSCD 2023年第10期12106-12115,共10页
Unexpected benefits to the catalytic performance of materials often originate from the presence of surface defects.Here,novel Dpenicillamine modified molybdenum oxide nanodots,with abundant oxygen vacancy defects,were... Unexpected benefits to the catalytic performance of materials often originate from the presence of surface defects.Here,novel Dpenicillamine modified molybdenum oxide nanodots,with abundant oxygen vacancy defects,were fabrication by a mild,simple,and cost-effective method.Ultraviolet–visible(UV–Vis)absorption spectra analysis showed that the nanodots had peroxidaselike and catalase-like activities.The reactive oxygen species were probed by electronic paramagnetic resonance technique and spectroscopic methods,demonstrating that the nanodots also had oxidase-like activity.Interestingly,the peroxidase-like activity of nanodots was synergistically enhanced in the presence of ferrous ions or ferric ions.Remarkably,less than nanomolar levels of ferrous ions were required to display this phenomenon,meaning Fenton reagent acted as leverage.Based on this,a sensitive colorimetric and fluorescent dual-mode sensor for alendronate sodium was developed.The linear ranges for colorimetric and fluorescence analysis were 0.2–2.5 and 0.2–2.0μM,with detection limits of 31.21 and 71.84 nM,correspondingly.The method has a simple large-scale material preparation process with higher sensitivity and shorter reaction time,which can inspire and enlighten the design of nanozyme sensors. 展开更多
关键词 nanozyme molybdenum oxide fenton reaction alendronate sodium multi-enzyme-like activities
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Fe_(2)O_(3)/TiO_(2)/reduced graphene oxide-driven recycled visible-photocatalytic Fenton reactions to mineralize organic pollutants in a wide pH range
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作者 Ru Zheng Dehong Yang +2 位作者 Yao Chen Zhenfeng Bian Hexing Li 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2023年第12期11-20,共10页
Photocatalytic Fenton reactions combined the advantages from both photocatalysis and Fenton reaction in mineralizing organic pollutants. The key problems are the efficiency and recycling stability. Herein, we reported... Photocatalytic Fenton reactions combined the advantages from both photocatalysis and Fenton reaction in mineralizing organic pollutants. The key problems are the efficiency and recycling stability. Herein, we reported a novel Fe_(2)O_(3)/TiO_(2)/reduced graphene oxide(FTG) nanocomposite synthesized by a facile solvothermal method. The TiO_(2)in FTG degraded organic pollutants and mineralized intermediates via photocatalysis under visible light irradiation, which could also promote Fenton reaction by accelerating Fe^(3+)-Fe^(2+)recycle. Meanwhile, the Fe_(2)O_(3)rapidly degraded organic pollutants via Fenton reactions, which also promoted photocatalysis by enhancing visible light absorbance and diminishing photoelectronhole recombination. The high distribution of TiO_(2)and Fe_(2)O_(3)on rGO, together with their strong interaction resulted in enhanced synergetic cooperation between photocatalysis and Fenton reactions, leading to the high mineralization efficiency of organic pollutants. More importantly, it could also inhibit the leaching of Fe species, leading to the long lifetime of FTG during photocatalytic Fenton reactions in a wide pH range from 3.4 to 9.2. 展开更多
关键词 Fe_(2)O_(3)/TiO_(2)/rGO nanocomposite(FTG) Visible-photocatalytic fenton reactions Synergetic effect Pollutant mineralization Strong durability in a wide pH range
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非贵金属催化电极Ni/C@CF的制备及绿色类Fenton性能 被引量:1
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作者 成施雨 杨灵 +4 位作者 包芮于 陈宸 崔萌萌 张谷令 李华 《高等学校化学学报》 SCIE EI CAS CSCD 北大核心 2024年第2期125-132,共8页
传统芬顿(Fenton)法利用Fe2+催化H_(2)O_(2)产生具有强氧化性的羟基自由基(•OH),可以高效氧化降解水中有机污染物,但其操作pH范围窄(pH≈3)和易产生铁絮凝沉淀的缺点限制了其应用发展.原子氢H*作为一种单电子供体,可以将电子快速转移到H... 传统芬顿(Fenton)法利用Fe2+催化H_(2)O_(2)产生具有强氧化性的羟基自由基(•OH),可以高效氧化降解水中有机污染物,但其操作pH范围窄(pH≈3)和易产生铁絮凝沉淀的缺点限制了其应用发展.原子氢H*作为一种单电子供体,可以将电子快速转移到H_(2)O_(2)中,生成•OH,适用于广泛的pH值,没有铁污泥产生,是一种新型高效绿色芬顿法.然而,原子H*更易相互结合形成H_(2),极不稳定,因此,探索合适的电催化剂对H*绿色Fenton的应用起着至关重要的作用.本文以炭黑作为载体,通过液相还原法制备了具有催化活性高、性能稳定的Ni/C@碳毡(Ni/C@CF)非贵金属电催化材料,制备的Ni纳米粒子均匀分散在炭黑上.以此电极材料为阴极,构建绿色Fenton催化体系,能够催化H_(2)O和H+生成H*,进而催化H_(2)O_(2)产生•OH,高效降解去除水中抗生素污染物.通过调节制备方法、电压、溶液pH值及外加氧化剂量,确定了该体系下的最佳反应条件. 展开更多
关键词 芬顿反应 原子氢 Ni/C@CF材料 电催化 有机污染物
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蒙脱土在光助非均相Fenton 反应中的应用研究进展
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作者 张云婷 刘正江 +2 位作者 马惠言 高晓平 麻文效 《印染》 CAS 北大核心 2024年第2期83-88,共6页
蒙脱土因具有良好的阳离子交换能力和吸附能力被广泛用作非均相Fenton催化剂的载体。介绍了蒙脱土负载铁氧化物、蒙脱土负载改性铁氧化物和蒙脱土负载半导体/铁氧化物三类催化剂在非均相光-Fenton反应处理水中污染物的应用,就三类催化... 蒙脱土因具有良好的阳离子交换能力和吸附能力被广泛用作非均相Fenton催化剂的载体。介绍了蒙脱土负载铁氧化物、蒙脱土负载改性铁氧化物和蒙脱土负载半导体/铁氧化物三类催化剂在非均相光-Fenton反应处理水中污染物的应用,就三类催化剂对污染物的降解机理和蒙脱土的作用进行分析,并对蒙脱土基非均相Fenton催化剂未来的研究方向进行探讨。 展开更多
关键词 蒙脱土 非均相光-fenton反应 机理
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凹凸棒负载碳-铁复合材料的制备及非均相Fenton反应降解水中亚甲基蓝的研究
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作者 秦亚飞 杨继涛 王贺洋 《化工新型材料》 CAS CSCD 北大核心 2024年第4期233-237,243,共6页
以凹凸棒为载体,采用共沉淀法和热解法制备了新型凹凸棒负载碳-铁复合材料。通过X射线衍射仪、傅里叶变换红外光谱仪、冷场发射扫描电子显微镜、X射线光电子能谱仪、热重分析仪对复合材料进行表征,用亚甲基蓝水溶液模拟有机染料废水,考... 以凹凸棒为载体,采用共沉淀法和热解法制备了新型凹凸棒负载碳-铁复合材料。通过X射线衍射仪、傅里叶变换红外光谱仪、冷场发射扫描电子显微镜、X射线光电子能谱仪、热重分析仪对复合材料进行表征,用亚甲基蓝水溶液模拟有机染料废水,考察复合材料在光暗体系下非均相Fenton催化降解亚甲基蓝的性能。结果表明,光照和暗环境下,最佳pH分别为4.0、3.5,反应120min时脱色率分别可达99.6%和96.3%。复合材料在光照环境下具有更好的催化活性,循环5次后,亚甲基蓝的脱色率仍可达99%,总有机碳去除率为42.2%,表现出良好的重复使用性。 展开更多
关键词 凹凸棒 芬顿反应 非均相 亚甲基蓝
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缺陷诱导电子-金属载体相互作用加速固液界面Fenton反应
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作者 毛海舫 刘洋 +1 位作者 许振民 卞振锋 《Chinese Journal of Catalysis》 SCIE CAS CSCD 2024年第6期247-258,共12页
水体污染物的深度氧化去除是环境领域的研究热点.芬顿反应作为典型的高级氧化技术(AOPs)被广泛用于水中有机污染物的去除.对于非均相芬顿反应,催化剂表面Fe^(3+)/Fe^(2+)的循环是决定其活性的主要因素.Fe^(3+)还原的关键在于接受额外电... 水体污染物的深度氧化去除是环境领域的研究热点.芬顿反应作为典型的高级氧化技术(AOPs)被广泛用于水中有机污染物的去除.对于非均相芬顿反应,催化剂表面Fe^(3+)/Fe^(2+)的循环是决定其活性的主要因素.Fe^(3+)还原的关键在于接受额外电子,因此电子是提升芬顿反应效率的关键.传统非均相催化剂由于表面“惰性”,限制了固液界面电子的传递,导致Fe^(3+)/Fe^(2+)的循环效率处于较低的水平.因此设计一种具有高效界面电子传递性能的催化剂对提高芬顿反应效率至关重要.本文通过简易的酸处理法,成功合成了富含缺陷的NH_(2)-UiO-66(d-NU)材料,并将其用于水中有机污染物的去除.核磁共振氢谱(1H NMR)、热重分析(TG)、傅里叶红外光谱(FTIR)和X射线吸收精细结构(EXAFS)等多种表征证明了酸处理诱导NH_(2)-UiO-66上缺陷结构的形成.光电流、电化学阻抗和时间分辨瞬态荧光光谱结果表明,缺陷结构的形成可有效促进光生电子-空穴的分离.与不含缺陷的NH_(2)-UiO-66(NU)相比,d-NU在光芬顿氧化过程中表现出更优的4-CP去除效率,其降解动力学速率常数是NU的11倍,极大地加速了4-CP的去除进程.实验及理论计算结果表明缺陷的形成破坏了Zr配位结构的几何对称性,导致Zr位点电荷密度的不对称分布.该不对称结构有利于Fe^(3+)富集到Zr-O簇上,并通过电子-金属-载体相互作用(EMSI)形成Zr‒O‒Fe桥键,促进催化剂固液界面电子的传输,提高催化剂界面Fe^(3+)/Fe^(2+)的循环效率.实际应用实验结果表明,在d-NU/Fe^(3+)/H_(2)O_(2)光芬顿体系中,环境水体中常见无机离子对4-CP的降解影响很小.同时,d-NU/Fe^(3+)/H_(2)O_(2)光芬顿体系能够对多种有机污染物保持较高的去除效率,且催化活性在经过10次循环后没有明显的衰减,说明d-NU具有较好的抗离子干扰性、降解多种污染物的普适性和结构稳定性.通过液相色谱-质谱监测确定了4-CP的降解途径,并通过毒理学模拟4-CP及其降解生成中间体的生物毒性,结果表明,4-CP降解过程中形成的中间体的综合毒性低于4-CP.综上,本研究揭示了MOF基芬顿催化剂中金属氧簇的配位关系对芬顿反应的作用机制,提出了富含缺陷的MOFs与Fe^(3+)之间电子转移的作用机制,为进一步开发高效芬顿催化剂提供了新思路. 展开更多
关键词 缺陷 NH_(2)-UiO-66 三价铁还原 电子-金属支撑作用 芬顿反应
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紫外光引发Fenton氧化技术协同去除造纸中段废水COD_(Cr)的性能研究 被引量:1
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作者 王喆 吕学斌 +1 位作者 李峰辉 郭俊利 《河南工学院学报》 CAS 2024年第1期26-29,共4页
对紫外光引发Fenton氧化技术协同处理造纸中段废水COD_(Cr)进行了研究,探究反应时间、FeSO_(4)·7H_(2)O浓度、H_(2)O_(2)浓度、pH值、紫外光强度等因素对COD_(Cr)去除效率的影响。实验结果表明,在反应时间80min,FeSO_(4)·7H_(... 对紫外光引发Fenton氧化技术协同处理造纸中段废水COD_(Cr)进行了研究,探究反应时间、FeSO_(4)·7H_(2)O浓度、H_(2)O_(2)浓度、pH值、紫外光强度等因素对COD_(Cr)去除效率的影响。实验结果表明,在反应时间80min,FeSO_(4)·7H_(2)O浓度0.6 mol/L,H_(2)O_(2)浓度0.3 mol/L,pH值为4,以及紫外光强度为14 mW/cm^(2)的最优条件下,该技术能够实现造纸中段废水74%的COD_(Cr)去除率。紫外光引发Fenton氧化技术能够有效促进Fenton氧化反应中·OH自由基的生成,提高造纸中段废水的COD_(Cr)去除效率。 展开更多
关键词 紫外光引发 fenton氧化 COD_(Cr) 造纸废水 协同作用
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基于天然黄铁矿的类Fenton体系处理焦化废水生化出水的研究
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作者 李曼 祁丽 彭静波 《工业水处理》 CAS CSCD 北大核心 2024年第3期81-88,共8页
焦化废水经过生化处理后仍含有大量难降解成分,直接外排会导致自然界水体污染。针对经典Fenton反应存在产生含铁污泥、适用pH范围较窄致使其在实际应用中局限性较大的问题,采用天然黄铁矿作为非均相Fenton反应催化剂对焦化废水生化出水... 焦化废水经过生化处理后仍含有大量难降解成分,直接外排会导致自然界水体污染。针对经典Fenton反应存在产生含铁污泥、适用pH范围较窄致使其在实际应用中局限性较大的问题,采用天然黄铁矿作为非均相Fenton反应催化剂对焦化废水生化出水进行处理,并以废水中苯酚作为模型污染物探究其氧化机理。结果表明,该工艺可以在较为宽泛的初始pH条件下对废水COD进行有效去除;废水COD的去除速率与黄铁矿的添加量呈正比,高浓度H_(2)O_(2)条件下COD去除速率略有增加,但增加的速度变慢;体系中存在均相和非均相两种催化条件,加入·OH捕获剂后,体系降解效率大幅度降低,证明体系中的主要氧化物种为·OH;苯酚是焦化废水中主要的有机污染物,检测了使用黄铁矿的类Fenton工艺降解苯酚过程中的中间产物,苯酚首先被氧化成对苯酚,随后很快转化为对苯醌,最终被氧化成小分子酸。 展开更多
关键词 黄铁矿 焦化废水生化出水 fenton反应催化剂 羟基自由基
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Fenton法预处理合成革废水的去除研究
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作者 王来春 钱佳 +2 位作者 熊晓敏 许柯 王庆 《科技和产业》 2024年第5期286-290,共5页
合成革废水中含有大量的二甲基甲酰胺(DMF)等有机污染物,对生物具有毒性危害。采用单因素试验方法,获得Fenton反应对DMF处理最佳工艺参数为pH=3、过氧化氢(H_(2)O_(2))与化学需氧量(COD_(Cr))的质量比m=6.69、H2O2与亚铁离子的摩尔比n=... 合成革废水中含有大量的二甲基甲酰胺(DMF)等有机污染物,对生物具有毒性危害。采用单因素试验方法,获得Fenton反应对DMF处理最佳工艺参数为pH=3、过氧化氢(H_(2)O_(2))与化学需氧量(COD_(Cr))的质量比m=6.69、H2O2与亚铁离子的摩尔比n=8及反应时间t=120 min, DMF的平均去除率达96.18%。在此基础上,利用Design-Expert软件中的响应面实验设计原理,设计三因素三水平共17组实验,进一步研究确定上述参数对Fenton法预处理合成革废水COD_(Cr)的去除效果。设计并制作针对DMF皮革废水有良好降解效果的Fenton一体化、H_(2)O_(2)和FeSO_(4)精准投加、pH精准调控的自动控制系统及集成反应设备,合成革废水的COD_(Cr)和DMF的平均去除率为71.87%和95.78%。 展开更多
关键词 fenton反应 合成革废水 二甲基甲酰胺(DMF) 自动控制系统
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Efficient Fe(Ⅲ)/Fe(Ⅱ) cycling triggered by MoO2 in Fenton reaction for the degradation of dye molecules and the reduction of Cr(Ⅵ) 被引量:14
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作者 Bin Shen Chencheng Dong +2 位作者 Jiahui Ji Mingyang Xing Jinlong Zhang 《Chinese Chemical Letters》 SCIE CAS CSCD 2019年第12期2205-2210,共6页
There is a relatively low efficiency of Fe(Ⅲ)/Fe(Ⅱ) conversion cycle and H2 O2 decomposition(<30%) in conventional Fenton process,which further results in a low production efficiency of ·OH and seriously res... There is a relatively low efficiency of Fe(Ⅲ)/Fe(Ⅱ) conversion cycle and H2 O2 decomposition(<30%) in conventional Fenton process,which further results in a low production efficiency of ·OH and seriously restricts the application of Fenton.Herein,we report that the commercial MoO2 can be used as the cocatalyst in Fenton process to dramatically accelerate the oxidation of Lissamine rhodamine B(L-RhB),where the efficiency of Fe(Ⅲ)/Fe(Ⅱ) cycling is greatly enhanced in the Fenton reaction meanwhile.And the L-RhB solution could be degraded nearly 100% in 1 min in the MoO2 cocatalytic Fenton system under the optimal reaction condition,which is apparently better than that of the conventional Fenton system(~50%).Different from the conventional Fenton reaction where the ’OH plays an important role in the oxidation process,it shows that 1 O2 contributes most in the MoO2 cocatalytic Fenton reaction.However,it is found that the exposed Mo^4+ active sites on the surface of MoO2 powders can greatly promote the rate-limiting step of Fe^3+/Fe^2+ cycle conversion,thus minimizing the dosage of H2 O2(0.400 mmol/L) and Fe^2+(0.105 mmol/L).Interestingly,the MoO2 cocatalytic Fenton system also exhibits a good ability for reducing Cr(Ⅵ) ions,where the reduction ability for Cr(Ⅵ) reaches almost 100% within 2 h.In short,this work shows a new discovery for M002 cocatalytic advanced oxidation processes(AOPs),which devotes a lot to the practical water remediation application. 展开更多
关键词 fenton reaction Co-catalytic Molybdenum dioxide Fe^3+/Fe^2+conversion Dye wastewater
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Catalytic degradation of methylene blue by Fenton like system: model to the environmental reaction 被引量:4
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作者 Sanjay R Thakare 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2004年第2期285-287,共3页
To develop more efficient chemical methods for the demineralization of organic pollutants from water bodies, which one was also mimic to the nature, a degradation of methylene blue by Fe(Ⅲ) and H 2O 2 in the absenc... To develop more efficient chemical methods for the demineralization of organic pollutants from water bodies, which one was also mimic to the nature, a degradation of methylene blue by Fe(Ⅲ) and H 2O 2 in the absence of light instead of Fe(Ⅱ) and H 2O 2 was studied. Results showed that use of Fe (Ⅲ) is more promising than Fe(Ⅱ). The present study reflects that Fenton reaction is more efficient, in the presence of a small amount of salicylic acid is added which is a one of the priority pollutant. 展开更多
关键词 advanced oxidation technology fenton reaction iron(Ⅲ) catalytic degradation environmental application
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Interfacial mechanisms of heterogeneous Fenton reactions catalyzed by iron-based materials: A review 被引量:39
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作者 Jie He Xiaofang Yang +1 位作者 Bin Men Dongsheng Wang 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2016年第1期97-109,共13页
The heterogeneous Fenton reaction can generate highly reactive hydroxyl radicals(·OH)from reactions between recyclable solid catalysts and H2O2 at acidic or even circumneutral pH.Hence,it can effectively oxidiz... The heterogeneous Fenton reaction can generate highly reactive hydroxyl radicals(·OH)from reactions between recyclable solid catalysts and H2O2 at acidic or even circumneutral pH.Hence,it can effectively oxidize refractory organics in water or soils and has become a promising environmentally friendly treatment technology.Due to the complex reaction system,the mechanism behind heterogeneous Fenton reactions remains unresolved but fascinating,and is crucial for understanding Fenton chemistry and the development and application of efficient heterogeneous Fenton technologies.Iron-based materials usually possess high catalytic activity,low cost,negligible toxicity and easy recovery,and are a superior type of heterogeneous Fenton catalysts.Therefore,this article reviews the fundamental but important interfacial mechanisms of heterogeneous Fenton reactions catalyzed by iron-based materials..OH,hydroperoxyl radicals/superoxide anions(HO2./O2^-.)and high-valent iron are the three main types of reactive oxygen species(ROS),with different oxidation reactivity and selectivity.Based on the mechanisms of ROS generation,the interfacial mechanisms of heterogeneous Fenton systems can be classified as the homogeneous Fenton mechanism induced by surface-leached iron,the heterogeneous catalysis mechanism,and the heterogeneous reaction-induced homogeneous mechanism.Different heterogeneous Fenton systems catalyzed by characteristic iron-based materials are comprehensively reviewed.Finally,related future research directions are also suggested. 展开更多
关键词 Heterogeneous fenton reactions ROS interfacial mechanisms iron-based materials
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Fenton reactions drive nucleotide and ATP syntheses in cancer 被引量:4
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作者 Huiyan Sun Chi Zhang +3 位作者 Sha Cao Tao Sheng Ning Dong Ying Xu 《Journal of Molecular Cell Biology》 SCIE CAS CSCD 2018年第5期448-459,共12页
We present a computational study of tissue transcriptomic data of 14 cancer types to address: what may drive cancer cell division? Our analyses point to that persistent disruption of the intraceUular pH by Fenton re... We present a computational study of tissue transcriptomic data of 14 cancer types to address: what may drive cancer cell division? Our analyses point to that persistent disruption of the intraceUular pH by Fenton reactions may be at the root of cancer development. Specifically, we have statistically demonstrated that Fenton reactions take place in cancer cytosoi and mitochondria across all the 14 cancer types, based on cancer tissue gene-expression data integrated via the Michaelis-Menten equation. In addition, we have shown that (i) Fenton reactions in cytosol of the disease cells will continuously increase their pH, to which the cells respond by generating net protons to keep the pH stable through a combination of synthesizing glycolytic ATPs and consuming them by nucleotide syntheses, which may drive cell division to rid of the continuously synthesized nucleotides; and (ii) Fenton reactions in mitochondria give rise to novel ways for ATP synthesis with electrons ultimately coming from H2O2, largely originated from immune cells. A model is developed to link these to cancer development, where some mutations may be selected to facilitate cell division at rates dictated by Fenton reactions. 展开更多
关键词 cancer driver fenton reaction gene-expression data intracellular pH Warburg effect
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Self-powered electrochemical system by combining Fenton reaction and active chlorine geheration for organic contaminant treatment 被引量:3
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作者 Yawei Feng Kai Han +5 位作者 Tao Jiang Zhenfeng Bian Xi Liang Xia Cao Hexing Li Zhong Lin Wang 《Nano Research》 SCIE EI CAS CSCD 2019年第11期2729-2735,共7页
Environmental deterioration,especially water pollution,is widely dispersed and could affect the quality of people's life at large.Though the sewage treatment plants are constructed to meet the demands of cities,di... Environmental deterioration,especially water pollution,is widely dispersed and could affect the quality of people's life at large.Though the sewage treatment plants are constructed to meet the demands of cities,distributed treatment units are still in request for the supplementary of centralized purification beyond the range of plants.Electrochemical degradation can reduce organic pollution to some degree,but it has to be powered.Triboelectric nanogenerator(TENG)is a newly-invented technology for low-frequency mechanical energy harvesting.Here,by integrating a rotary TENG(R-TENG)as electric power source with an electrochemical cell containing a modified graphite felt cathode for hydrogen peroxide(H2O2)along with hydroxyl radical(·OH)generation by Fenton reaction and a platinum sheet anode for active chlorine generation,a self-powered electrochemical system(SPECS)was constructed.Under the driven of mechanical energy or wind flow,such SPECS can efficiently degrade dyes after power management in neutral condition without any O2 aeration.This work not only provides a guideline for optimizing self-powered electrochemical reaction,but also displays a strategy based on the conversion from distributed mechanical energy to chemical energy for environmental remediation. 展开更多
关键词 self-powered electrochemistry fenton reaction active chlorine organic contaminant degradation
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Reinventing MoS2 Co-catalytic Fenton reaction:Oxygen-incorporation mediating surface superoxide radical generation 被引量:3
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作者 Xianjun Tan Wenhui Ding +2 位作者 Zhenying Jiang Linxiao Sun Yuxiong Huang 《Nano Research》 SCIE EI CSCD 2022年第3期1973-1982,共10页
To better understand the mechanisms of hydrogen peroxide(H_(2)O_(2))’s decomposition and reactive oxygen species(ROS)’s formation on the catalyst’s surface is always a critical issue for the environmental applicati... To better understand the mechanisms of hydrogen peroxide(H_(2)O_(2))’s decomposition and reactive oxygen species(ROS)’s formation on the catalyst’s surface is always a critical issue for the environmental application of Fenton/Fenton-like reaction.We here report a new approach to activate H_(2)O_(2) in a co-catalytic Fenton system with oxygen incorporated MoS2,namely MoS_(2−x) O_(x) nanosheets.The MoS_(2−x) O_(x) nanosheets assisted co-catalytic Fenton system exhibited superior degradation activity of emerging antibiotic contaminants(e.g.,sulfamethoxazole).Combining density functional theory(DFT)calculation and experimental investigation,we demonstrated that oxygen incorporation could improve the intrinsic conductivity of MoS_(2−x) O_(x) nanosheets and accelerate surface/interfacial charge transfer,which further leads to the efficacious activation of H_(2)O_(2).Moreover,by tuning the oxygen proportion in MoS_(2−x) O_(x) nanosheets,we are able to modulate the generation of ROS and further direct the oriented-conversion of H_(2)O_(2) to surface-bounded superoxide radical(·O_(2−surface)).It sheds light on the generation and transformation of ROS in the engineered system(e.g.,Fenton,Fenton-like reaction)for efficient degradation of persistent pollutants. 展开更多
关键词 Co-catalytic fenton reaction MoS2 nanosheets reactive oxygen species(ROS) superoxide radical antibiotics’degradation
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