JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
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IF 6.3
Qiqi Gu,Shijin Cheng,Qiaoyi Xiao,Qianchen Ou,Hongmei Wang,Yuan Lian,Liping Guo
The FeCo-LDH/Cd 1-x Zn x S nanocomposite was synthesized via an impregnation method, employing FeCo-LDH as a cocatalyst for simultaneous upcycling of polyethylene terephthalate (PET) plastics and photocatalytic hydrogen production. The 5 %LDH/Cd 0.5 Zn 0.5 S nanocomposite demonstrated an optimal hydrogen evolution rate of 3.67 mmol·g −1 ·h −1 in alkaline PET solution, which is 2.3 times higher than pristine Cd 0.5 Zn 0.5 S. Notably, the photocatalyst retained stable performance over six recycling tests without significant activity loss. Concurrently, PET oxidation by photogenerated holes yielded acetate as the primary product, achieving an 87 % yield. The real-world applicability of this approach was further validated through the successful photoreforming of a PET bottle. UV–vis DRS, TRPL, and PEC analyses revealed that the incorporation of appropriate amount of FeCo-LDH significantly enhanced charge carrier separation, thereby boosting the photocatalytic activity. Furthermore, UPS and DFT calculations elucidated the mechanistic pathway for PET conversion and hydrogen production over FeCo-LDH/Cd 0.5 Zn 0.5 S. This study presents a promising strategy for co-producing hydrogen and value-added chemicals from PET waste, highlighting its potential for practical recycling applications.
研究领域:
材料科学
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环境科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2025
·
IF 2.6
Feng Jiao,Jinzhao Huang,Zehui Liu,Yu Zhang,Xiaolong Deng,Ke Zhang,Guixin Zhao
In this paper, sodium sulfite (Na₂SO₃) and cerium nitrate (Ce(NO₃)₃) were added in the hydrothermal method for the preparation of FeCo LDH, and needle-like Ce-FeCo LDH (NS) catalysts were grown in situ on a carbon cloth.The additions of Na₂SO₃ and Ce(NO₃)₃ regulated the electron transfer of the metal cations in the LDH, and significantly improved the performance of the catalysts. The prepared Ce-FeCo LDH (NS) catalysts exhibited excellent electrochemical properties. The overpotential of OER was 221 mV at a current density of 10 mA/cm² in 1 M KOH. The surface structure and catalytic performance of the catalysts were maintained well after 100 h stability test. This study provides a new idea for the improvement and design of OER catalysts based on FeCo LDH, which is an important reference for clean energy research.
研究领域:
材料科学
·
清洁能源研究
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DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2024
·
IF 4.1
Shuhan Jiang,Yujie Jia,Xiaoxia Yang,Qianchen Ou,Yanan Liu,Siqian Zhang,Dianwu Huang,Hongmei Wang
FeCo-LDH/g-C 3 N 4 S-type heterojunction photocatalysts were successfully prepared by thermal polymerization and electrostatic self-assembly methods. The structure, morphology, light absorption and photoelectrochemical properties of the prepared samples were characterized. The photocatalytic properties of the photocatalysts were evaluated by the degradation of tetracycline (TC) and photocatalytic hydrogen evolution from water splitting under visible light irradiation. The experimental results showed that the photocatalytic properties of FeCo-LDH/g-C 3 N 4 nanocomposites were superior to those of pristine g-C 3 N 4 . In addition, when the mass ratio of FeCo-LDH to g-C 3 N 4 was 7:100, the photocatalytic performance of the as-prepared FeCo-LDH(7 %)/g-C 3 N 4 is the optimal. The TC degradation rate of FeCo-LDH(7 %)/g-C 3 N 4 reached 78.0 % within 120 min, which was 2.63 times of that of pure g-C 3 N 4 . And the photocatalytic hydrogen evolution of FeCo-LDH(7 %)/g-C 3 N 4 was 107.28 μmol for 4 h, which was 12.68 times that of g-C 3 N 4 . The results showed that the as-prepared FeCo-LDH/g-C 3 N 4 nanocomposite photocatalysts have excellent performance in the degradation of TC and the photocatalytic H 2 evolution. Meanwhile, the EPR and trapping experiments revealed that OH and O 2 − played a main role in the photocatalytic TC degradation. The mechanism of photocatalytic TC degradation and hydrogen production of FeCo-LDH/g-C 3 N 4 nanocomposite photocatalysts was also discussed.
研究领域:
材料科学
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环境科学
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光催化技术
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2022
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IF 8.907
Xintao Ma,Shuo Wang,Hui Wang,Junjie Ding,Sen Liu,Zixu Huang,Wenzhi Sun,Guijing Liu,Ling Wang,Wenlong Xu
The layered structure of layered double hydroxides (LDH) is the key to its use as an electrode material , however, the lack of efficient charge exchange between layered structures severely limits the application of LDH in supercapacitors . In this work, FeCo-LDH was composited with C 3 N 4 by hydrothermal method , and a penetrating structure was built using the layered structure of the two materials. The penetrating structure provides a channel for charge transfer between FeCo-LDH layers and also solves the self-stacking problem of C 3 N 4 . The structure of the composites was explored by X-ray diffractometer (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM) and transmission electron microscope (TEM), and the results showed that FeCo-LDH composited with C 3 N 4 and formed a penetrating structure. In addition, the electrochemical behavior of the electrode material was evaluated by cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) and electrochemical impedance spectroscopy (EIS). Electrochemical test results show that it has a high specific capacity (593 C g −1 ) at 1 A g −1 . Furthermore, in order to study the energy storage properties of the composites, the optimal composites were designed as positive electrode as asymmetric supercapacitors , and the designed asymmetric supercapacitor still has a retention rate of 83.72 % after 10,000 cycles. This attractive performance reveals that FeCo-LDH@C 3 N 4 could as an electrode material for high-performance supercapacitors .
研究领域:
材料科学
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电化学
✓ 已验证
DOI
高影响因子
International Journal of Electrochemical Science
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2024
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IF 1.3
Peng Zhang,Xin Meng,Xiaomin Luo,Jian Wang,Jianyan Feng,Yun Ma,Ka Li,Ying Liu,Lufeng Ji
Herein, we innovatively crafted a novel CNT/MoS 2 /FeCo-LDH cathode membrane using a facile vacuum filtration method. Benefiting from the unique heterostructure between FeCo-LDH and MoS 2 , the prepared CNT/MoS 2 /FeCo-LDH cathode membranes catalyzed the production of high-concentration H 2 O 2 (7.59 mg/L) at a low current density of 1.50 mA/cm 2 . The peak degradation efficiency of phenol (98.80 %) was reached in only 60 min. Under optimized operating conditions, the phenol removal rate of the CNT/MoS 2 /FeCo-LDH cathode membrane remained above 80.00 % within a wide pH range (3.0–9.0), demonstrating excellent adaptability. The synergistic incorporation of Mo, Fe, and Co ions facilitated additional chemical reaction pathways for Fenton-like reactions, thereby significantly enhancing hydrogen peroxide production. Notably, our approach exhibited moderate total organic carbon degradation efficiency, even for the actual pretreatment of coking wastewater, presenting a promising strategy for addressing recalcitrant industrial wastewater.
研究领域:
环境科学
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材料科学
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废水处理技术
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产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2022
·
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
CONSTRUCTION AND BUILDING MATERIALS
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2024
·
IF 7.4
Xiao-Hui Shi,Hong Shi,Xue-Lin Li,Shi-Jie Wu,Wei-Min Xie,De-Yi Wang
The integration of layered double metal hydroxides (LDH) into epoxy resin (EP) for flame retardancy is in line with the principles of environmentally friendly and sustainable development. In this study, polydopamine (PDA)-primed intercalated LDH containing iron and cobalt ions (LDH-DBS@PDA) was prepared, and its chemical composition, structure and morphology were thoroughly characterized. Due to the synergistic flame-retardant properties exhibited by LDH and PDA, as well as the catalytic charring properties of iron and cobalt ions in both condensed and gaseous phases, EP composite with 5 wt% LDH-DBS@PDA achieved a UL-94 V-0 rating with a limiting oxygen index of 30.7 %. Moreover, EP/LDH-DBS@PDA exhibited a significant decrease in total heat release by 48 % and smoke release by 52 %, demonstrating remarkable fire safety performance. Additionally, the existence of LDH-DBS@PDA improved impact strength , tensile strength , and glass transition temperature due to strong interactions between PDA and EP matrix. This work presents a promising strategy for developing highly efficiency flame retardants with excellent compatibility for polymeric materials.
研究领域:
材料科学
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化学工程
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2026
·
IF 5.8
Yongqi Liu,Shengjie Huang,Lei Qian,Jingjing Fan,Yurui Zhi
Photo-assisted supercapacitors constitute an emerging field focused on harnessing solar energy to augment electrochemical charge storage, with electrode material design playing a pivotal role in driving progress in this area. In this work, FeCo layered double hydroxide was directly grown on nickel foam (FeCo-LDH/NF) via both microwave-assisted and conventional hydrothermal methods for a systematic comparison of their synthesis efficiency, morphology, and photo-assisted capacitive performance. Experimental results demonstrate that the microwave-assisted route is significantly more efficient, requiring only 40 min to achieve a mass loading of ∼1 mg cm -2 , whereas the conventional method necessitates 2 h under otherwise identical conditions. The FeCo-LDH/NF electrode prepared by microwave-assisted synthesis exhibits a uniform hierarchical structure with abundant electroactive sites and delivers a specific capacitance of 1335 F g -1 at 1 A g -1 under illumination, corresponding to a 28.6 % enhancement compared to its performance in the dark (1038 F g -1 ). This improvement is primarily attributed to the promotion of surface redox reactions by photogenerated electron-hole pairs. Notably, the microwave-synthesized FeCo-LDH/NF outperforms its conventionally synthesized counterpart in terms of specific capacitance, rate capability, and photo-induced capacitance enhancement. An asymmetric supercapacitor assembled with the microwave-synthesized FeCo-LDH/NF as the positive electrode and activated carbon (AC) as the negative electrode delivers an energy density of 72.06 Wh kg -1 under illumination at a power density of 2.88 kW kg -1 , significantly higher than that achieved in the dark (60.1 Wh kg -1 ). This study not only offers a rapid and efficient synthesis strategy for high-performance FeCo-LDH electrodes but also provides new insights into the design of photo-assisted energy storage devices.
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Yu He,Mengyao Zhao,Xiang Li,Weiliang Xiong,Guosheng Shao,Peng Zhang,Yige Zhao
Two-dimensional van der Waals heterojunctions (2D vdWHs) have garnered significant interest owing to their ability of efficiently interfacial electron transfer, tunable band structures, and high structural stability. Nevertheless, the utilization of 2D vdWHs as multifunctional electrocatalysts is still rarely explored. In this work, we synthesized a 30% FeCo LDH/TiN/NC electrocatalyst via high-temperature solid-state and hydrothermal methods, featuring a 2D vdWH architecture in which FeCo LDH nanosheets are uniformly anchored onto the TiN/NC substrate. The resulting electrocatalyst exhibits remarkable trifunctional activity and stability for the oxygen reduction reaction (ORR), oxygen evolution reaction (OER), and hydrogen evolution reaction (HER), comparable to those of commercial catalysts. The superior electrocatalytic performance is attributed to the interfacial electron redistribution, in which the electron transfer from TiN/NC to FeCo LDH enhances charge transfer kinetics and increases the number of active sites during electrochemical reactions. Moreover, the 30% FeCo LDH/TiN/NC electrocatalyst shows great promise for applications in both zinc-air batteries (ZABs) and overall water splitting. This study underscores the potential of 2D vdWHs and offers valuable insights for the design of advanced multifunctional electrocatalysts.
研究领域:
材料科学
·
电化学
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纳米技术
·
能量存储与转换
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Xin Deng,Jinwei Chen,Qiuyan Chen,Yunzhe Zhou,Xinchi Liu,Jie Zhang,Gang Wang,Ruilin Wang
The modification of Ir or oxygen vacancies (V o ) is a strategy to enhance the oxygen evolution reaction (OER) performance of heterogeneous nanocatalysts. However, it is crucial to further clarify the synergistic effect of Ir and V o on the enhancement mechanism of OER performance after surface reconstruction. In this work, FeCo Layered double hydroxides (LDHs) co-modified by Ir and V o were successfully prepared by the thermodynamically favorable galvanic replacement reaction. Electrochemical impedance spectroscopy confirmed that the synergistic effect of Ir and V o enhanced the charge transfer of FeCo LDHs. XPS spectra reveal robust interactions between Ir and FeCo LDHs. Density-functional theory further reveals that the low-oxygen-coordinated Ir (III) acts as an active site to optimize the OER rate-determining step energy barrier. As a result, Ir and V o co-modified FeCo LDH requires only a 203 mV overpotential to achieve a current density of 10 mA cm −2 and, more importantly, operates stably at an industrial current density of 250 mA cm −2 for 312 h without degradation. This work provides new insights and avenues for understanding the enhanced performance mechanism of catalysts after surface reconstruction and for industrial scale-up production.
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
ENERGY & FUELS
·
2024
·
IF 5.2
Yuan-Ming Cao,Xue-Lei Duan,Miao Bian,Hou-Yu Wang,Yi-Wen Shen,Chong Gao,Chun-Gang Yuan
The immobilization of Hg0 and detoxication of Hg-containing composites are enormous challenges for Hg pollution control, which provide a high requirement for the design and synthesis of materials. Herein, a new composite with halloysite, selenium, and transition metals as raw materials (FeCo-LDH/HNTs@Se) for a Hg0 trap was designed by precipitation with ion exchange and an in situ selenization method. Intrinsic features such as high affinity, microwave permittivity (109–1012), large surface area, abundant pores, and many active components favored Hg0 removal and immobilization. The removal performance, flue gas tolerance, and synergistic effect of active components were improved greatly when microwave was added. The study indicated that (1) the Hg0 removal efficiency of the composite could reach 99.4%; (2) the composite had excellent tolerance to different industries’ flue gases. The electron exchange of Co(II)/Co(III) and Fe(II)/Fe(III) and the existence of Se and SeO2 were important for Hg0 immobilization. HgSe was the main adsorption product based on both X-ray photoelectron spectroscopy (XPS) and an online lab-built thermal decomposition system (TPD-AFS) analysis, which made the used-materials possess low mercury leaching content (0.09 mg·L–1) lower than the US EPA regulatory value (0.2 mg·L–1). This work provides a sound way for mercury control, which is significant for environmental protection.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2024
·Vol. 12
·期 1
·179-190
·
IF 6.1
Weiwei Han,Wenyi Wang,Jiahong Liao,Yi He,Xingwang Zhang,Chunlin Yu
Sustainable hydrogen production by electrocatalytic water splitting is a promising energy storage technology yet challenging due to the sluggish kinetics of the oxygen evolution reaction (OER). Rationally designed robust and high-efficiency non-noble metal electrocatalysts for large-current-density OER are highly desirable for industrial-grade hydrogen production. Herein, a unique hierarchical heterostructure electrocatalyst composed of FeCo layered double hydroxide nanosheets and a NiSe nanowire array grown on Ni foam (FeCo LDH/NiSe@NF) is demonstrated. The optimized FeCo LDH/NiSe@NF exhibits an excellent OER activity with low overpotentials of 230, 266 and 298 mV at current densities of 100, 500 and 1000 mA cm−2 in an alkaline solution. In particular, it can deliver 1000 mA cm−2 without much decay after the long-term stability test for 100 h. Both the experimental results and theoretical calculations reveal that reasonable construction of a hierarchical heterostructure, as well as the strong interaction at the heterointerface between NiSe and FeCo LDH can not only offer sufficient exposure of the surface active sites, better electrochemical conductivity and structural stability, but also effectively optimize electronic configurations and lower the reaction energy barriers, consequently facilitating the reaction kinetics especially in large-current-density alkaline water electrolysis. Moreover, a two-electrode electrolyzer using FeCo LDH/NiSe@NF and NiCoP/NiCoSx@NF as the anode and cathode only needs a cell voltage of 1.849 V to reach 1000 mA cm−2 in 30 wt% KOH solution at 80 °C. The high catalytic activity and long-term stability of the catalyst at large current densities have exceeded most electrocatalysts reported, highlighting its great potential in large-scale applications.
研究领域:
材料科学
·
能源化学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）