JOURNAL OF HAZARDOUS MATERIALS
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2020
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IF 9.038
Yanbiao Liu,Shengnan Yang,Hualin Jiang,Bo Yang,Xiaofeng Fang,Chensi Shen,Jianmao Yang,Wolfgang Sand,Fang Li
Advanced nanotechnologies for efficient arsenic decontamination remain largely underdeveloped. The most abundant inorganic arsenic species are neutrally-charged arsenate, As(III), and negatively-charged arsenite , As(V). Compared with As(V), As(III) is 60 times more toxic and more difficult to remove due to high mobility. Herein, an electrochemical filtration system was rationally designed for one-step As(III) decontamination . The key to this technology is a functional electroactive carbon nanotube (CNT) filter functionalized with sea urchin-like FeOOH. With the assistance of electric field, CNT-FeOOH anodic filter can in situ transform As(III) to less toxic As(V) while passing through. Then, as-produced As(V) could be effectively sequestrated by FeOOH. The sufficient exposed sorption sites, flow-through design, and filter’s electrochemical reactivity synergistically guaranteed a rapid arsenic removal kinetic. The underlying working mechanism was unveiled based on systematic experimental investigations and theoretical calculations. The system efficacy can be adapted across a wide pH range and environmental matrixes. Exhausted CNT-FeOOH filters could be effectively regenerated by chemical washing with diluted NaOH solution. Outcomes of the present study are dedicated to provide a straightforward and effective strategy by integrating electrochemistry , nanotechnology, and membrane separation for the removal of arsenic and other similar heavy metals from water bodies.
研究领域:
环境科学
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纳米技术
·
电化学工程
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DOI
PubMed
高影响因子
CHEMOSPHERE
·
2020
·
IF 5.778
Fu He,Wencheng Ma,Dan Zhong,Yixing Yuan
The pipe deposits from water distribution network are iron-wastes, which could be used as a catalyst of advanced oxidation processes (AOPs). This paper prepared one main composition (α-FeOOH) of pipe deposits and compared the difference of chloramphenicol (CAP) degradation by α-FeOOH-activated hydrogen peroxide/persulfate and α-FeOOH-activated hydrogen peroxide/peroxymonosulfate with hydroxylamine assistance. Several key affecting factors were investigated. The results revealed that the double-oxidant system has a synergy effect in CAP degradation process. The hydroxyl radicals were identified as the predominant radicals in two different degradation processes via electron paramagnetic resonance (EPR) technique. The possible degradation pathways and products were confirmed by liquid chromatography-mass spectrometry (LC-MS). This study provided a theoretic research for pollutant removal by taking full advantage of pipe deposits and advance the development of water quality security in water distribution network in future.
研究领域:
环境科学
·
水处理工程
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DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2025
·
IF 3.9
He Xianhong,Tian Wei,Ahmed Jahangeer,Bai Zhengyu,Yang Lin
Bismuth vanadate (BiVO 4 , BVO) is an ideal photoabsorber for the photoelectrocatalytic water splitting, but its performance and photostability limit its commercial application. Therefore, enhancing the catalytic performance and stability becomes an increasingly crucial issue. In this study, we report a composite catalytic material poly (3,4-ethylenedioxythiophene, EDOT) (PEDOT)-modified β-FeOOH nanosheets loading onto the surface of BVO through the hydrolysis of Fe 3+ in BVO semiconductor film and the catalytic polymerization of EDOT form the conductive polymer. The structure facilitates the catalytic process, and when it is used in photoelectrocatalysis oxygen evolution reaction, it exhibits a photocurrent density of 3.3 mA cm −2 at 1.23 V versus standard hydrogen electrodes. Mechanistic studies show that the introduction of PEDOT-modified β-FeOOH optimized the electrode/electrolyte contact interface, adjusted the defect state, and provided catalytically active sites during the catalytic process. This study provides a feasible idea for exploring the catalytic mechanism of BVO-based photoelectrode and designing catalysts.
研究领域:
材料科学
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电化学
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能源转换
✓ 已验证
产品关联
DOI
高影响因子
INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Xian-Yu Shen,Ya-Nan Wang,Ya-Ting Zheng,Ye Wang,Wen-Wen Dong,Jun Zhao,Dong-Sheng Li
Formaldehyde (HCHO), a crucial industrial chemical, finds extensive applications across diverse sectors, including household products, commercial materials, aviation, and medical supplies. Methane (CH4), as an abundant C1 resource, presents a promising feedstock for HCHO synthesis. However, the direct conversion of CH4 to HCHO remains challenging due to its inherent chemical inertness, characterized by low polarizability and high C–H bond dissociation energy (439 kJ mol–1), coupled with the high reactivity of intermediate products. The development of efficient strategies for selective CH4 oxidation to high-value HCHO under mild conditions is therefore of significant practical importance. In this study, we developed a series of MIL-125-NH2@FeOOH-x heterostructured photocatalysts (FM-x) through the controlled deposition of FeOOH nanoparticles on MIL-125-NH2 surfaces. Comprehensive characterization and photocatalytic evaluations reveal that the optimized FM-1 catalyst facilitates in situ H2O2 generation and subsequent decomposition into hydroxyl radicals (•OH), enabling efficient CH4 photooxidation. Remarkably, the FM-1 catalyst achieves an exceptional HCHO production rate of 197.79 μmol·gcat–1 with >99.99% selectivity in water vapor, significantly outperforming both pristine FeOOH and MIL-125-NH2 components. This work presents a promising photocatalytic system for selective CH4 conversion, offering new insights into the design of efficient catalysts for C1 chemistry.
研究领域:
化学工程
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材料科学
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环境科学
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产品关联
DOI
PubMed
高影响因子
Micromachines
·
2024
·Vol. 15
·期 3
·387
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IF 3
Wenyao Zhang,Ya Zhang,Xiao Miao,Ling Zhao,Changqing Zhu
Hematite is one of the most promising photoanode materials for the study of photoelectrochemical (PEC) water splitting because of its ideal bandgap with sufficient visible light absorption and stability in alkaline electrolytes. However, owing to the intrinsically high electron-hole recombination, the PEC performance of hematite is still far below that expected. The efficient charge separation can be achieved via growth of FeOOH on hematite photoanode. In this study, hematite nanostructures were successfully grown on the surface of iron foil by the simple immersion deposition method and thermal oxidation treatment. Furthermore, cocatalyst FeOOH was successfully added to the hematite nanostructure surface to improve charge separation and charge transfer, and thus promote the photoelectrochemical water splitting. By utilizing the FeOOH overlayer as a cocatalyst, the photocurrent density of hematite exhibited a substantial 86% increase under 1.5 VRHE, while the onset potential showed an apparent shift towards the cathodic direction. This can be ascribed to the high reaction area for the nanostructured morphology and high electrocatalytic activity of FeOOH that enhanced the amount of photogenerated holes and accelerated the kinetics of water splitting.
研究领域:
材料科学
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能源转换
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2023
·
IF 6.2
Changwang Ke,Qin Zhao,Yu Zhang,Xiaofei Yang,Weiping Xiao
Designing inexpensive and high-efficiency Fe(oxy)-hydroxide nanomaterials are essential to accelerate the sluggish kinetics of oxygen evolution reaction (OER). However, it is still a challenge to increase its electronic conductivity and exposure of the active site, as well as make it work under high current densities. Herein, a facile corrosion engineering strategy is proposed to in-situ synthesize the self-supporting Fe(oxy)-hydroxide heterostructures on nickel foam substrate in the corrosion system of “FeCl 3 -NaCl”. The morphologies and phase compositions characterization show that Cl - concentration can accelerate the oxygen corrosion process, while the concentration and species of metal irons can change the composition of the corrosion products. The synergistic effect of Cl - and Fe 3+ enabled the FeOOH-Fe 2.0 catalyst with stereoscopic nano-microflower structure, which owns abundant active sites, strong catalyst-base bond interaction, and fast electron transfer efficiency, reducing the potential reaction barrier of OER kinetics. Therefore, the obtained FeOOH-Fe 2.0 provides a lower overpotential of 263 mV to achieve the current density of 100 mA cm −2 and a low Tafel slope of 64.03 mV dec −1 in 1 M KOH electrolyte. Furthermore, the FeOOH-Fe 2.0 catalyst is used as an air electrode material to assemble Zn-air battery, which reaches the peak power density of 107.10 mW cm −2 and achieves long-term charge/discharge performance. This project offers a simple and effective method for preparing high-efficiency OER catalyst by corrosion strategy and confirms its application prospect in rechargeable Zn-air batteries.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
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2025
·
IF 9.5
Yixing Luo,Yang Yang,Yakun Tian,Qingsheng Wu,Wen-Feng Lin,Ming Wen
Transition-metal based layered double hydroxides (TM-LDHs) have attracted widespread attention due to their advantages for the electrocatalytic oxygen evolution reaction (OER). However, their sluggish and unstable reconstruction during the OER has seriously limited their applications in water electrolysis at industrial-level current density. Herein, FeOOH/FeNiCo-LDH heterogeneous nanosheets (2.1 nm in thickness) are uniformly integrated on honeycomb-channel N-doped carbon (FeOOH/FeNiCo-LDH/HCNC) through a self-sacrificing and dual-ion etching strategy. Thermodynamically favoured hydrogen/electron-capturing ability of FeOOH together with kinetically favoured rapid mass/electron transfer efficiency of conductive HCNC collaboratively accelerates the reconstruction of FeNiCo-LDH to generate highly active and stable FeNiCoOOH species, which displays an optimal reaction pathway with reduced energy barrier for the OER. Consequently, FeOOH/FeNiCo-LDH/HCNC exhibits superior OER activity in both alkaline freshwater (η10 = 258 mV with Tafel slope of 32.4 mV dec−1) and alkaline natural seawater (η10 = 296 mV with Tafel slope of 54.7 mV dec−1). When applied in anion exchange membrane electrolyzer as OER electrocatalyst, FeOOH/FeNiCo-LDH/HCNC achieves outstanding stability with low cell-voltage increase rates of 1.7 mV h−1 (freshwater) and 1.5 mV h−1 (seawater) over 120 h at the industrially required current density of 500 mA cm−2. This study proposed an ingenious reconstruction strategy for advanced TM-LDH electrocatalysts toward industrial applications.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2023
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IF 6.2
Xinrui Qiang,Chao Feng,Bingzhe Jia,Han Wang,Yan Wang,Xinming Wu
The same element heterojunction structure can effectively improve the energy density of the electrodes with its unique structural properties, but the specific mechanism of heterojunction action is not clear. Based on this, in this paper, the same element heterojunction electrode constructed with FeOOH on NiFe-LDHs can reach a specific capacitance of 4.34 F cm -2 at 2 mA cm -2 . After 6000 cycles, its capacity is still maintained to 95.67% (30 mA cm -2 ). The FeOOH@NiFe-LDHs//AC flexible supercapacitor device was prepared to achieve a specific capacitance of 1.06 F cm -2 at 2 mA cm -2 . More notably, an impressive energy density of 0.47 mWh cm -2 at 1.78 mW cm -2 was achieved, which is higher than previous reported. In addition, the capacitance remains 96.3% after 3000 cycles at 50 mA cm -2 , and the electrode exhibited flexibility and outstanding bending stability. The high energy density of the electrodes in this study is attributed to the resulting Fermi energy level differences, which provide more carriers and increase the conductivity of the electrode material. This suggests that the heterojunction has obvious advantages for increasing the energy density of both flexible and non-flexible electrodes, and also provides new ideas for the application of supercapacitors in wearable electronic devices.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Rui Guo,Yan He,Tao Yu,Peng Cheng,Junhua You,Hongji Lin,Chien-Te Chen,Tingshan Chan,Xuanwen Liu,Zhiwei Hu
Surface modification of electrocatalysts is a convenient strategy for addressing the drawbacks arising from the sluggish kinetics of the oxygen evolution reaction (OER). However, the preparation of electrocatalysts usually involves complex procedures, rendering investigation of the catalytic mechanism difficult. In this study, S-modified FeOOH electrocatalysts were prepared via a facile hydrothermal method at 120 °C. The electrocatalyst exhibited an outstanding OER performance with an overpotential of 254 mV at 50 mA·cm −2 . Morphological, structural, and electrochemical characterizations revealed that Fe ion is the most important active center. The effect of S on the catalytic process was investigated based on the steric hindrance for OH* adsorption, changes in ΔG of the rate-determining step, and coordination mode of the active species. This is the first report on the formation of an (Fe-S)-O* bond that plays a key role in enhancing the electrochemical performance.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2019
·Vol. 25
·期 12
·3112-3118
·
IF 5.16
Zhipeng Lin,Hao Zhang,Guofeng Liang,Yanqi Jin,Hongbin Zeng,Jiawang Li,Jian Chen,Weihong Zhang,Fangyan Xie,Yanshuo Jin,Hui Meng
Graphical Composite nanostructured cathode : FeOOH nanocubes with a core–shell structure and anchored on carbon ribbons have been prepared. The carbon ribbons improve the conductivity of the system and make more of the FeOOH surface available for electrochemical reaction. An Li/O 2 battery with FeOOH as the cathode material shows a specific capacity of 14816 mAh g −1 cathode and a long-term stability of 67 cycles over 400 h (see figure). A composite of FeOOH nanocubes anchored on carbon ribbons has been synthesized and used as a cathode material for Li/O 2 batteries. Fe 2+ ion-exchanged resin serves as a precursor for both FeOOH nanocubes and carbon ribbons, which are formed simultaneously. The as-prepared FeOOH cubes are proposed to have a core–shell structure, with FeOOH as the shell and Prussian blue as the core, based on information from XPS, TEM, and EDS mapping. As a cathode material for Li/O 2 batteries, FeOOH delivers a specific capacity of 14816 mA h g −1 cathode with a cycling stability of 67 cycles over 400 h. The high performance is related to the low overpotential of the oxygen reduction/evolution reaction on FeOOH. The cube structure, the supporting carbon ribbons, and the -OOH moieties all contribute to the low overpotential. The discharge product Li 2 O 2 can be efficiently decomposed in the FeOOH cathode after a charging process, leading to higher cycling stability. Its high activity and stability make FeOOH a good candidate for use in non-aqueous Li/O 2 batteries.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Chuan Gang,Jiayi Chen,Qihao Chen,Yantao Chen
The supported and dispersed ultrafine active species for electrocatalytic water oxidation are quite promising for the high intrinsic activity. A novel heterostructure of ultrafine FeOOH nanodots with an average size of 2.3 nm supported on CoAl-LDH nanosheets , is constructed by a facile method under ambient conditions. The as-prepared FeOOH@CoAl-LDH shows a strong interfacial interaction upon the formation of heterostructure, and is demonstrated as a highly efficient and stable electrocatalyst that demands 272 mV to attain 50 mA cm −2 and exhibits a Tafel slope of 40 mV dec −1 . Moreover, density functional theory calculations manifest the coupling of FeOOH with CoAl-LDH can effectively decrease the energy barrier during the water oxidation process by optimizing the adsorption free energy of intermediates in the reaction pathway. The successful development of FeOOH@CoAl-LDH can shed light on the design of novel electrocatalysts that can fully take advantages of small size, heterostructure and synergistic effect.
研究领域:
材料科学
·
电化学
·
理论计算
✓ 已验证
DOI
PubMed
高影响因子
Sustainable Energy & Fuels
·
2023
·Vol. 7
·期 4
·977-985
·
IF 5.6
Tingting Wen,Limin Wang,Yaqiong Gong
Design and synthesis of a highly efficient OER catalyst is the key to improve the efficiency of hydroelectrolysis for hydrogen production. In this paper, a rational approach to improve the catalytic performance of CoMoO4 nanomaterial was reported. A nanoflower structured CoMoO4 precursor was synthesized on nickel foam using a typical hydrothermal method. Then, CoMoO4/NF was etched through brief immersion in iron nitrate solution at room temperature to produce FeOOH–CoMoO4/NF. The unique 3D structure of FeOOH–CoMoO4/NF could availably promote interfacial electron transfer as well as effectively provide abundant active sites, and it exhibited excellent electrocatalytic activity. FeOOH–CoMoO4/NF requires an overpotential of 209 mV to achieve a current density of 10 mA cm−2. Meanwhile, the material FeOOH–CoMoO4/NF exhibits excellent catalytic durability of up to 24 h, which is promising for practical applications in energy conversion. Thus, this work may offer a viable strategy to assemble remarkable OER electrocatalysts.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）