CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yulong Luo,Kerun Li,Wei Liu
The Advanced Oxidation Process (AOPs) has garnered significant attention as an efficient and promising technology for wastewater treatment in the field of environmental remediation. Currently, the exploration of highly effective catalysts for peroxymonosulfate (PMS) activation remains a focal point of scientific research, with increasing emphasis placed on the reuse of waste materials. In line with this objective, this study reports the synthesis of a Fe Co bimetallic metal-organic framework (MOF)-sponge composite (FCS) via an in-situ growth method using discarded natural sponge as a support material. Subsequently, the carbonized derivative (FCSC), obtained through high-temperature carbonization, was employed as a catalyst for PMS activation. The resulting catalyst demonstrated remarkable efficiency in removing 4-nitrophenol (4-NP) from aqueous solutions. Utilizing waste natural sponge as a support not only facilitates resource recovery but also enables the uniform distribution of MOF particles within its inherent three-dimensional porous structure. This feature enhances the contact between the catalyst and pollutants, thereby improving catalytic performance. Moreover, diatomic active sites exhibit significantly higher degradation efficiency toward 4-NP compared to the monometallic configurations. This enhanced performance can be attributed to the more rapid generation of free radicals by diatomic structures during PMS activation, which accelerates electron transfer between metal centers and adjacent oxygen atoms. This work offers novel insights into the development of efficient strategies for the removal of organic contaminants.
研究领域:
环境科学
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材料科学
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化学工程
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纳米技术
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产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2016
·
IF 3.782
Nannan Qin,Ya Zhang,Hongjian Zhou,Zhigang Geng,Gang Liu,Yunxia Zhang,Huijun Zhao,Guozhong Wang
The reactivity of zero valent iron (Fe 0 ) for removing Cr(VI) is self-inhibiting under neutral and alkaline conditions, due to the precipitation of ferrous hydroxide on the surface of Fe 0 . To overcome this difficulty, we incorporated a second metal (Co) into Fe 0 to form FeCo bimetallic nanoparticles (FeCo BNPs), which can achieve higher activity and significant improvement in the reaction kinetics for the removal of Cr(VI) compared with Fe 0 . The FeCo BNPs were synthesized by a hydrothermal reduction method without using any templates. The characterization analysis indicated that the products were highly uniform in large scale with 120–140 nm size in diameter. The obtained FeCo BNPs exhibited a remarkable removal ability for Cr(VI) in the pH range of 5.3–10.0. Especially, FeCo BNPs were able to reduce trace Cr(VI) (1.0 mg L −1 , pH = 7.5) down to about 0.025 mg L −1 within 1 h. XPS analysis confirmed that Cr(VI) was reduced to Cr(III) by FeCo BNPs, while Fe and Co was oxidized, implying a chemical reduction process. The enhanced removal of trace Cr(VI) could be originated from the introduction of Co, which not only served as a protecting agent against surface corrosion by galvanic cell effect, but also enhanced the efficient flow of electron transfer between iron and Cr(VI). All the results primarily imply that FeCo BNPs can be employed as high efficient material for wastewater treatment.
研究领域:
环境科学
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纳米技术
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水处理
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产品关联
DOI
PubMed
高影响因子
Materials Today Nano
·
2025
·
IF 8.2
Ziqi Zhang,Beibei Zhan,Yuhao Yang,Xiaosi Qi,Junfei Ding,Xiu Gong,Yunpeng Qu,Lei Wang
Metal organic frameworks are broadly used as promising precursors or templates for the fabrication of carbon-based derivatives owing to their exceptional porosities, structural diversities, and large specific surface areas. In this study, a facile method was reported to construct yolk-shell FeCo@air@C nanocomposites via annealing FeCo-prussian blue analogues (PBA)@phenolic resin (PR) precursor at different temperatures under Ar atmosphere. The introduction of PR effectively reinforced the stability of FeCo-PBA microstructure during carbonization process and played a confining role in preventing the serious agglomeration of FeCo nanoparticles. By adjusting the pyrolysis temperature, different categories of yolk-shell FeCo@air@C nanocomposites had been selectively established. Amongst, the FeCo@air@C obtained at 600 °C exhibited the superior electromagnetic wave absorption performances with a minimum reflection loss of -68.3 dB at the thickness of 2.44 mm and an ultrabroad effective absorption bandwidth of 8.2 GHz at 3.20 mm. Interestingly, its corresponding radar cross section value exhibited excellent radar stealth property in the practical applications. Therefore, the results elucidate that the combination of space confinement engineering and temperature optimization strategy is an indeed advanced method to regulate the electromagnetic wave absorption performances of magnetic carbon-based materials derived from FeCo-PBA.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2022
·
IF 6.371
Juxiang Tai,Youpeng Bi,Chunsheng Ni,Xiaodong Wu,Tete Daniel Koudama,Sheng Cui,Xiaodong Shen,Xiangbao Chen
Given the sluggish kinetics limiting the oxygen evolution reaction (OER), developing efficient and robust OER catalysts is highly demanded in developing efficient energy conversion technologies. Herein, we have grown FeCo oxyhydroxides on the 3D graphene oxide (GO) framework (FeCo 2 O x (OH) y /GO) via a simple sol-gel process, combined with the supercritical drying technique. The resulting FeCo 2 O x (OH) y /GO aerogel-based electrocatalyst possesses high porosity and a large BET specific surface area with 223.52 m 2 /g, which exposes more active sites, as well as provides diffusion channels for the reaction products. The resulting electrocatalyst requires an overpotential of 305 mV at a current density of 10 mA cm −2 , with a low Tafel slope (43.7 mV dec −1 ) and excellent stability, which indicates superior OER catalytic activity to that of the commercial RuO 2 /C under alkaline conditions. Based on density functional theory (DFT) calculations, the synergistic effect between the GO layer and FeCo oxyhydroxides layer has been revealed by the electronic structures calculations . The incorporation of GO results in a negative shift of the d -band center of the surface active sites, indicating a decrease in the binding strength between the catalyst surface and the intermediates, therefore accelerating the OER process.
研究领域:
材料科学
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电化学
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理论计算
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产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2020
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IF 4.65
Ruiyang Tan,Jintang Zhou,Zhengjun Yao,Bo Wei,Jiaqi Zu,Haiyan Lin,Zhong Li
Magnetic-dielectric composites are widely used in microwave absorption applications and have been continuously concerned by researchers. The synthesis of high-performance microwave absorbers with specific structures is a hot research topic. However, the question on how to reasonably combine the magnetic and dielectric components for achieving excellent microwave absorption performance still remains unanswered. In this study, FeCo/C microspheres were synthesized by a two-step hydrothermal method . FeCo nanoparticles were embedded in carbon spheres and formed the graphite layers, which is similar to Ferrero Rocher® chocolates. The electromagnetic parameters can be effectively adjusted by controlling the hydrothermal reaction time and excellent microwave absorption properties can be achieved at a low filling ratio. The FeCo/C microspheres exhibit the maximum reflection loss of – 20.61 dB and – 51.36 dB at the thickness of 1.6 mm and 2.6 mm, respectively. The effective absorption bandwidth of these microspheres is about 4.3 GHz. The specific Ferrero Rocher® chocolates-like multi-level structure increases to a large extent the material’s conduction loss and polarization relaxation loss. At the same time, the reasonable ratio of the magnetic and dielectric components significantly improves the impedance matching. Therefore, this study is aimed at providing insights into understanding of the absorption mechanism and reliable references to the design of magnetic-dielectric composed microwave absorbers.
研究领域:
材料科学
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电磁学
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微波工程
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纳米技术
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
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IF 9.136
Chun-Yang Li,Lu Yang,Jing Wang,Shi-Wen Lv,Jin Wang,Jing-Min Liu,Shuo Wang
For several decades, toxic thermally processed hazards, represented by heterocyclic amines (HCAs), have gradually become a challenge in the field of purification owing to their increasing exposure, wide variety, and the complexity of the matrix. In this study, the first example of degradation-removal of HCAs was illustrated by using a newly-integrated Fe/Co co-doped layered double hydroxide (FeCo-LDH) as photocatalysts based on sulfate radical advanced oxidation processes (SR-AOPs). Under the excitation of UV light, a FeCo-LDH/sodium persulfate (PS) photocatalytic degradation system combined with ultra-performance liquid chromatography mass spectrometer (UPLC-MS) was established. The synthesized photocatalysts were optimized by varying the Fe/Co ratio, and a series of photochemical activities and reaction conditions were investigated for a better performance. As a result, the FeCo-LDH/PS system was able to degrade 12 kinds of common HCAs efficiently and simultaneously, and was also well applicable in real edible oil samples with completely degraded. Moreover, it exhibited well reusability, preserving 97.75% of initial activity after being used for 5 cycles. It is the first application of photocatalytic combined with SR-AOPs technology for the degradation of HCAs and provides a promising example for the regulation of thermally processed hazards.
研究领域:
环境科学
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食品科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2023
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IF 9.9
Rui Feng,Qi-Dong Ruan,Jiu-Ju Feng,You-Qiang Yao,Lin-Mei Li,Lu Zhang,Ai-Jun Wang
Single-atom transition metal-based nitrogen-doped carbon (M−N x −C) is regarded as high-efficiency and cost-effectiveness alternatives to replace noble metal catalysts for oxygen reduction reaction (ORR) in renewable energy storage and conversion devices. In this work, rich FeCo dual-single atoms were efficiently entrapped into N -doped carbon nanocages (FeCo DSAs-NCCs) by simple pyrolysis of the bimetallic precursors doped zeolitic imidazolate framework-8 (ZIF-8), as affirmed by a series of characterizations. The graphitization degree of the N -doping carbon substrate was regulated by modulating the pyrolysis temperature and the types of the metal salts. The typical catalyst substantially improved the alkaline ORR performance, with the onset potential ( E onset ) of 0.99 V ( vs . RHE) and half-wave potential ( E 1/2 ) of 0.88 V ( vs . RHE). Ultimately, the catalyst-assembled Zn-air battery possessed a higher open-circuit voltage of 1.501 V, larger power density of 123.7 mW cm −2 , and outstanding durability for 150 h. This study provides a guide on developing ORR catalysts for electrochemical energy conversion and storage technology.
研究领域:
材料科学
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电化学能源
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Wei Chen,Guangfu Qian,Qinglian Xu,Miaojing Pan,Lin Luo,Shibin Yin
The exploitation of catalysts with low-cost and superior oxygen evolution reaction (OER) and urea oxidation reaction (UOR) performance is important to expand the application of water splitting. Herein, the FeCo/CoFe 2 O 4 nanoflowers are successfully embedded in N-doped graphitic carbon (NGC) by hydrothermal method and subsequently annealing process (FeCo/CoFe 2 O 4 @NGC). It only needs 1.47 V and 1.32 V for OER and UOR to produce a current density of 10 mA cm −2 . Besides, it can work continuously for 100 h at different current densities (10; ∼ 1000 mA cm −2 ), displays outstanding stability, which is mainly ascribed to the N-doped carbon encapsulated FeCo modified CoFe 2 O 4 heterostructure and porous structure. This study thus provides a simple synthesis method to design and manufacture low-cost and high-performance catalytic materials for OER and UOR, and promotes the industrial application of water splitting.
研究领域:
材料科学
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电化学
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纳米技术
·
能源材料
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2022
·
IF 24.319
Zhendong Zhao,Wenjun Zhou,Daohui Lin,Lizhong Zhu,Baoshan Xing,Zhiqi Liu
High metal loading of single-atom catalysts enables excellent catalytic activity, but possibly causes serious aggregation problem. Herein, a series of diatomic FeCo−N/C-x (x represents metal content) were skillfully designed and applied to improve the catalytic activity for peroxymonosulfate (PMS) activation toward degrading organic micropollutants. The unprecedented dual active sites, referring to Fe(N 3 )−Co(N 3 ) moiety and FeCo alloy, are constructed on the obtained FeCo−N/C-x, thereby exhibiting significantly greater performance toward degrading aqueous phenol (e.g., 0.316 min −1 for FeCo−N/C-3) via PMS activation, compared with those of traditional single-atom Co−N/C (0.011 min −1 ) and Fe−N/C (0.018 min −1 ). Combined experimental and theoretical calculations demonstrate the independent functions of dual active sites, in which Fe(N 3 )−Co(N 3 ) and FeCo alloy can decrease the energy barrier of O−O bond cleaving resulting in the formation of high-valent FeCo O reactive species and singlet oxygen, respectively. This study opens up a new platform toward constructing dual active sites for enhanced Fenton-like catalytic activity.
研究领域:
环境科学
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催化化学
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材料科学
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产品关联
DOI
高影响因子
MOLECULES
·
2025
·Vol. 30
·期 9
·1869
·
IF 4.6
Lili Chen,Shuya Xue,Xin Li,Linbo Deng,Jiapeng Li,Jing Zhou,Yansha Gao,Xuemin Duan,Limin Lu
The development of sensitive and selective methods for detecting pesticide residues has become paramount for ensuring food safety. In this work, a high-performance molecularly imprinted electrochemical sensor based on the composite of Cu-BTC- and FeCo-ZIF-derived N-doped carbon (FeCo@NC), synthesized by pyrolysis and electrodeposition, was developed for Benomyl (BN) detection. The materials were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). In this sensing system, the Cu-BTC/FeCo@NC composite used as the electrode substrate displayed a large specific surface area, high electronic conductivity, and rich active catalytic sites, demonstrating excellent electrocatalytic ability toward BN oxidation. Meanwhile, Cu-BTC, with its abundant surface functional groups, facilitated strong hydrogen bonding interactions with the imprinted template molecule of 3,4-ethylenedioxythiophene (EDOT), promoting the formation of a uniform molecularly imprinted membrane on the substrate material surface. The introduced MIP-PEDOT could enhance the selective recognition and enrichment of the target BN, leading to an amplified detection signal. Thanks to the synergistic effects between Cu-BTC/FeCo@NC and MIP-PEDOT, the proposed sensor achieved a low detection limit of 1.67 nM. Furthermore, the fabricated sensor exhibited high selectivity, reproducibility, and interference resistance in detecting BN. The method has been successfully applied to the determination of BN in vegetable and fruit samples, indicating its potential for use in practical applications.
研究领域:
食品科学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Hu Liu,Dong-Hui Yang,Xu-Yun Wang,Jiangwei Zhang,Bao-Hang Han
Exploiting low cost and durable electrocatalysts with high efficiency for oxygen reduction reaction (ORR), oxygen evolution reaction (OER), and hydrogen evolution reaction (HER) is of great significance for energy conversion and storage applications. Herein, a hybrid electrocatalyst of FeCo alloy nanoparticles embedded in a porous N -doped carbon was prepared via a pyrolysis process of low-cost melamine sponge and mass-produced metal–polyphenol network. Benefting from the metal coordination of metal–polyphenol network and abundant N source of melamine sponge, the metal–N moiety and FeCo alloy nanoparticles (wtih a diameter around 50 nm) encapsulated in a N -doped graphene-like carbon layer were formed in-situ. Such intimate integration of graphene-like carbon-encapsulated FeCo alloys, metal–N active species, and porous structure is conducive to improve the catalytic activity and increase the catalytic durability in alkaline media. As a consequence, the as-prepared electrocatalyst exhibits the pronounced activity toward ORR, OER, and HER simultaneously under alkaline condition, particularly on the performances of potential, stability, and methanol tolerance.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale
·
2023
·Vol. 15
·期 45
·18395-18406
·
IF 6.7
Kun Wang,Liyuan Wang,Jinrui Huang,Ye Chen,Xupo Liu,Tianfang Yang,Gangya Wei,Shuyan Gao
The introduction of transition bimetallic alloys can effectively improve oxygen reduction reaction (ORR) activity. However, the alloy particles are inclined to dissolve under harsher conditions, resulting in a serious decrease in catalytic activity and stability. Herein, an efficient ORR catalyst, FeCo alloy nanoparticles (NPs) encapsulated in N,S co-doped carbon nanotubes (FeCo10-NSCNTs), was developed through a self-catalyzed growth strategy. Due to the delicate structural design, the N,S co-doped structure can effectively improve the ORR performance by modulating the electronic properties and surface polarity of the carbon substrate, and the randomly connected carbon nanotube structure with large specific surface area can further enhance the adsorption and dissociation of gas molecules, accelerating the kinetics of gas participation in the reaction. Carbon-encapsulated FeCo alloys are beneficial for improving catalytic activity and durability. The FeCo10-NSCNTs displayed excellent ORR activity with a half-wave potential of E1/2 = 0.84 V and robust stability of 13 k cycles. More impressively, the assembled liquid-state Zn–air battery (ZAB) with FeCo10-NSCNTs as the air-electrode delivers an output power density of 146.68 mW cm−2 along with excellent operation durability. The assembled all-solid ZAB has good cyclic stability under 0–180° bending conditions. The synthesized N,S co-doping, carbon nanotubes and FeCo alloys provide important guidance for the construction of cheap non-noble metal–carbon hybrid nanomaterials.
研究领域:
材料科学
·
电化学
·
能源存储与转换
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）