Inorganic Chemistry Frontiers
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2019
·Vol. 6
·期 6
·1490-1500
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IF 5.934
Yuanguo Xu,Jie Liu,Meng Xie,Wei Wei,Ting Zhou,Jia Yan,Hui Xu,Haiyan Ji,Huaming Li,Jimin Xie
In this study, NixFeyO4–BiOBr (NFB) composites with different etching degrees were successfully synthesized via a simple hydrothermal method. The etching degree was regulated by adjusting the pH during the synthesis process. The superiorities of the obtained materials can be outlined as follows: (i) BiOBr has the property of generating H2O2in situ; and (ii) NixFeyO4 nanoparticles in the composite could effectively promote the decomposition of H2O2, which proceeded via the two-electron reduction of O2 on the surface of BiOBr. The excellent properties of the prepared materials were confirmed through the photocatalytic degradation of bisphenol A under visible light irradiation, which is denoted as a solid–liquid-interfacial Fenton system. This work may pave the way for in situ H2O2 generation and decomposition; thus, the defects of traditional Fenton reaction systems, such as strict reaction conditions, high costs and secondary contamination after reactions, can be intelligently overcome.
研究领域:
环境科学
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材料科学
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DOI
高影响因子
Environmental Science-Nano
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2018
·Vol. 5
·期 8
·1834-1843
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IF 6.087
Zehui Li,Yuheng Jiang,Chenming Liu,Zhuoya Wang,Zhiqin Cao,Yi Yuan,Mingjie Li,Yaling Wang,Daliang Fang,Zhuang Guo,Dongbin Wang,Guangjin Zhang,Jingkun Jiang
Hydrogen peroxide (H2O2) is a key species in many environmental processes such as the electro-Fenton system to remove organic pollutants in wastewater treatment. Traditional methods for measuring H2O2 are often complex and time-consuming. Due to their low cost and high catalytic activity, transition metals (TM) can be used as high-performance electrochemical sensing materials for detecting H2O2. However, the aggregation of metal atoms will severely limit their catalytic efficiency and exposure area. In this study, we explored a method to disperse TM homogeneously on a zeolitic imidazolate framework-8 (ZIF-8) derived nitrogen-doped carbon (N/C) nanoframework and used it as the electrocatalyst for detecting H2O2 in an electro-Fenton system. Cu and Mn were used as the examples. Benefitting from the homogeneously dispersed TM, the synthesized nanoframework with a low content of TM exhibits superior electrocatalytic activity and an anti-interference ability in detecting H2O2. It has a wide linear range (0.0005–50 mM for 1% Cu–N/C and 0.0001–50 mM for 1% Mn–N/C) and a low detection limit (0.047 μM for 1% Cu–N/C and 0.036 μM for 1% Mn–N/C). Using the synthesized nanoframework, a system for continuously detecting the H2O2 concentration in an electro-Fenton system in situ was presented. The reported method to fabricate such nanomaterials with a higher catalytic efficiency of TM has implications in other applications such as environmental treatment, catalysis, and energy conversion.
研究领域:
环境科学
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材料科学
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电化学
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DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2022
·
IF 4.326
Shujun Sun,Jun Zhang,Changdong Sheng,Hui Zhong
A novel Na2SiO3/Fenton system was employed for NO removal from coal-fired flue gas in a bubble reactor. The NO removal efficiency of this system could reach 94.36% when the flue gas residence time was 3 s. The hydrolysis reaction of Na2SiO3 produced OH-, which made the solution alkaline, and the formation of iron-based colloids in the alkaline environment effectively catalyzed the generation of free radicals from H2O2, O2•– radicals, which was the main reason for the increase of NO removal efficiency. The reaction of H2O2 catalyzed by iron-based colloids increased the solution pH, which could not only further improve the NO removal efficiency but also enhance the useless decomposition of H2O2. Na2SiO3 could buffer the solution pH, which weakened the ineffective decomposition of H2O2 and prolonged the effective denitrification time. The X-ray diffraction and ion chromatography analysis showed that NO was finally converted to NO3– and NO2–.
研究领域:
环境科学
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化学工程
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DOI
高影响因子
Water
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2022
·Vol. 14
·期 7
·1007
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IF 3.53
Xudong Cheng,Xiaoping Zhang,Shaoqi Zhou,Lin Shi
For the treatment of 2-naphthol wastewater, the homogeneous electro-Fenton process was considered as an effective method but some disadvantages greatly restrict its application. The three-dimensional electro-Fenton (3D-EF) system using a nano zero-valent iron-supported biochar (NZVIs-BC) particle electrode and a Cu-supported stainless steel electrode (Cu-SSE) was proposed to avoid the disadvantages of the homogeneous electro-Fenton. In this work, the 3D-EF system was developed, which consisted of a Cu-SSE (cathode), a graphite rod (anode) and a NZVIs-BC particle electrode. The effect of the ratio of ferrous sulfate heptahydrate (FS) to rice straw (RS), CuSO4•5H2O amount, initial pH of 2-naphthol wastewater and current intensity (the output current of the power supply) on the removal rate of 2-naphthol were investigated. It is noteworthy that more than 98.36% of the 2-naphthol in aqueous solution was removed by the 3D-EF system, and only about 60.09% of 2-naphthol was removed by the homogeneous electro-Fenton system. Furthermore, naphthalene, benzoic acid, β-naphthoquinone, 1, 2-naphthalenedione, phenol and aromatic hydrocarbon were the main degradation products of 2-naphthol by the 3D-EF system; the toxicity of 2-naphthol wastewater was also greatly reduced.Keywords:electro-Fenton;Cu-supported stainless steel electrode;nano zero-valent iron-supported biochar;2-naphthol wastewater
研究领域:
环境科学
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化学工程
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DOI
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
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2021
·Vol. 36
·期 3
·e6556
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IF 4.105
Wen-Jing Qiu,Ming-Wu Gao,Qi Chen,Ao Zheng,Yi-Jia Shi,Xin Liu,Juan-Hong Li,Guo-Liang Dai,Yang Hu,Zi-Xia Lin
Under normal temperature and pressure, a novel improved Fenton system that was named MHACF-MOF-808(Zr) was constructed after the introduction of Pd/MOF-808(Zr) and H 2 to solve the inherent problem of the production of iron sludge in the classic Fenton system. Only trace amount of Fe II was required during the whole reaction because Fe III could be rapidly reduced by the active hydrogen derived from the adsorption and activation of H 2 on the surface of Pd/MOF-808(Zr) composite. The concentration of Fe II could be maintained more than 10 μM. The removal of target pollutant sulfamethazine in this system was mainly relied on the degradation of ·OH verified by both of the direct detection and indirect inhibition (using methanol). By using the calculation of Laplacian bond order, the degradation pathway of sulfamethazine followed by the cleavage of N S bond. This prediction was verified by the detection of intermediate products. Only 21% sulfamethazine could be degraded after 3-h reaction in the classic Fenton reaction system, while it could be thoroughly degraded in 1.5 h in the MHACF-MOF-808(Zr) system. The influence of main parameters on the degradation effect of sulfamethazine, such as initial pH, the flow of H 2 , dosage of Pd/MOF-808(Zr), concentration of sulfamethazine, ferrous, and hydrogen peroxide, were systematically studied. Based on the relative stability of Pd/MOF-808(Zr) confirmed by the morphological characterization, sulfamethazine could be efficiently degraded in the MHACF-MOF-808(Zr) system.
研究领域:
环境科学
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化学工程
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DOI
高影响因子
NEW JOURNAL OF CHEMISTRY
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2022
·Vol. 46
·期 6
·2653-2661
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IF 3.925
Long Jin,Feng Liu,Jian-hua Wu,San-Jian Ma,Juan-Hong Li,Yong-Jing Tian,Xin Liu,Zi-Xia Lin
A novel improved Fenton system named MHACF-UiO-66(Zr) was constructed under normal temperature and pressure based on the reduction of FeIII accelerated by hydrogen. The regeneration of FeII was enhanced by Pd/UiO-66(Zr). The hydroxyl radical could be continuously generated using only trace level FeII. 10 mg L−1 4-chlorophenol could be thoroughly degraded in the initial conditions of 75 mL min−1 H2, pH 3, 20 mM H2O2, 2 g L−1 Pd/UiO-66(Zr) and 20 μM FeII. Moreover, the removal efficiency of 15 mg L−1 sulfamethazine could be maintained at least more than 94% under the same conditions. The activity of the solid catalyst could be maintained after 6 consecutive reaction cycles. This provides new insight for improving the inherent shortcomings of the Fenton reaction, which generates large amounts of iron sludge.
研究领域:
环境科学
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催化化学
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产品关联
DOI
高影响因子
DALTON TRANSACTIONS
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2022
·Vol. 52
·期 4
·1009-1020
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IF 4.569
Min Pan,Ning Wang,Zhenting Weng,Xuehua Zou,Xiaoming Huang
A heterogeneous Fenton-like system comprising palygorskite/MnO2/Fe3O4 (PMM) as a superior, low-cost, and eco-friendly ternary catalyst for the activation of peroxymonosulfate (PMS) was investigated with regard to its ability to degrade Acid Scarlet GR in an aqueous solution. Under the optimum catalytic oxidation conditions of 1 g L−1 PMM, 0.7 g L−1 PMS, and an initial pH value of 5, 200 mg L−1 Acid Scarlet GR was completely degraded within 300 min. PMM exhibited outstanding magnetic recovery ability and reusability after nine cycles with a degradation efficiency of up to 95.4%. The PMM catalyst had a broad working pH range. Singlet oxygen 1O2 was considered to play the principal role in the degradation of Acid Scarlet GR in the PMM/PMS system. The synergistic effect between MnO2, Fe3O4, and PG substantially accelerated the catalytic activity of PMM, and MnO2 was identified to be the primary active site. These findings indicate that PMM is a nanocatalyst that can efficiently activate PMS for the treatment of dye-containing wastewater.
研究领域:
环境科学
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催化化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2019
·
IF 8.355
Yuan Zhuang,Siyi Yuan,Jiemin Liu,Yan Zhang,Hao Du,Chuandong Wu,Peng Zhao,Haiying Chen,Yipu Pei
Volatile organic compound (VOC) emissions are a global environmental concern because of their potential health risks. The removal of refractory VOCs calls for advanced technologies with powerful oxidative ability and high mass transfer efficiency. In this study, a yolk-shell Fe 3 O 4 @C/Fenton system was designed to improve octane removal efficiency. The octane removal efficiency at equilibrium was increased by 24.7% relative to that of the Fe 3 O 4 /Fenton system, and the main intermediate or byproduct levels decreased by 89.4%. The yolk-shell Fe 3 O 4 @C displayed higher catalytic and mass transfer efficiencies for octane degradation than Fe 3 O 4 . A synergistic effect of mass transfer enhancement and catalytic oxidation was observed in the yolk-shell Fe 3 O 4 @C/Fenton system. The mechanism of the synergistic effect of mass transfer and octane degradation, a regional reaction theory for the yolk-shell structure, and octane removal pathways were proposed and supported by the octane removal results and byproducts detection and measurement. This yolk-shell Fe 3 O 4 @C/Fenton system provides an effective and advanced way to treat refractory and hydrophobic VOCs, and its preparation can be extended to other high-efficiency core-shell structure catalyst-carbon materials.
研究领域:
环境科学
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化学工程
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材料科学
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催化
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污染控制
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）