JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Yi-Shan Ouyang,Qing-Yuan Yang
Photocatalyst systems generally consist of catalysts and cocatalysts to realize light capture, charge carrier migration, and surface redox reactions. Developing a single photocatalyst that performs all functions while minimizing efficiency loss is extremely challenging. Herein, rod-shaped photocatalysts Co 3 O 4 /CoO/Co 2 P are designed and prepared using Co-MOF-74 as a template, which displays an outstanding H 2 generation rate of 6.00 mmol·g −1 ·h −1 when exposed to visible light irradiation. It is 12.8 times higher than pure Co 3 O 4 . Under light excitation, the photoinduced electrons migrate from the catalysts of Co 3 O 4 and CoO to the cocatalyst Co 2 P. The trapped electrons can subsequently undergo a reduction reaction to produce H 2 on the surface. Density functional theory calculations and spectroscopic measurements reveal that enhanced performance results from the extended lifetime of photogenerated carriers and higher charge transfer efficiency. The ingenious structure and interface design presented in this study may guide the general synthesis of metal oxide/metal phosphide homometallic composites for photocatalysis.
研究领域:
材料科学
·
能源化学
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DOI
PubMed
高影响因子
Tungsten
·
2026
·
IF 9
Zhang Yan,Qi Zhaoxiang,Fu Dewen,Wang Ying,Zhang Wenjun,Qi Ying,Mi Hongyu,Guo Changyan,Abulizi Xiaokaiti,Guan Qingqing,Yin Shu,Xie Yahong,Dai Bin
The oxygen evolution reaction (OER) remains a major bottleneck in water electrolysis due to its sluggish kinetics, which fundamentally limits the overall efficiency of hydrogen production. In contrast, the urea oxidation reaction (UOR) offers a promising alternative with significantly lower overpotential, thereby reducing energy consumption. However, the development of stable and multifunctional electrocatalysts for simultaneous efficient hydrogen production and wastewater treatment poses a considerable challenge. In this study, a hierarchical amorphous Co-MOF-modified P-SnCoFe-layered double hydroxides (LDHs) heterostructure (denoted as Co-MOF@P-SnCoFe-LDHs) electrocatalyst was developed through a “MOF interfacial anchoring-dual doping electronic reconstruction” strategy, which integrates ZIF-67 Co-MOF with P/Sn co-doped CoFe-LDHs. The optimized catalyst exhibits exceptional bifunctional activity, achieving outstanding UOR performance with potentials of 1.34 and 1.53 V (vs. RHE) to achieve current densities of 10 and 50 mA cm −2 , respectively. For the OER, it requires low overpotentials of 213 mV (1 mol L −1 KOH) and 237 mV (oilfield wastewater) at 10 mA cm −2 . Mechanistic studies reveal that the spatial confinement effect of amorphous Co-MOF enhances chloride corrosion resistance, leading to a 27% improvement in operational stability. Concurrently, π–d conjugation between the imidazole ligands and the Sn–P network facilitates charge transfer, reducing the charge-transfer resistance by 31% ( R ct = 1.98 Ω). Furthermore, the constructed multi-phase interfaces promote the generation of active intermediates at lower applied potentials (1.0–1.1 V vs. RHE). This work provides a rational catalyst design strategy for energy-efficient hydrogen production and wastewater treatment under harsh saline conditions. Graphical abstract Co-MOF@P-SnCoFe-LDH/NF was successfully prepared via a simple electrodeposition-immersion method. The π–d conjugation between imidazole ligands and the Sn-P network facilitates charge transfer, while the constructed heterogeneous interface promotes the generation of active intermediates at a low applied potential (1.0–1.1 V vs. RHE), enabling efficient hydrogen evolution and wastewater treatment under high-salt conditions.
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高影响因子
DIAMOND AND RELATED MATERIALS
·
2026
·
IF 5.2
Rafi Ullah,Raza Ullah,Pervaiz Ahmad,Adeel Ahmed,Rizwan Ahmed Malik,Awais Khalid
The creation of efficient and resilient catalysts for advanced oxidation processes (AOPs) is crucial for the effective elimination of persistent pharmaceutical contaminants from wastewater. Cobalt metal–organic framework ( Co -MOF) was effectively incorporated into polyacrylonitrile (PAN) nanofibers using electrospinning and subsequently carbonized to produce cobalt nanoparticles supported on carbon nanorods (Co/CNRs). The customized catalyst, Co/CNR-2, demonstrated evenly dispersed cobalt nanoparticles, an increased surface area, and improved electrical conductivity, which collectively enabled rapid activation of peroxymonosulfate (PMS). The catalyst Co/CNR-2 exhibited remarkable catalytic effectiveness in the degradation of diclofenac (DCF), achieving almost 99% removal after 20 min using 0.5 g/L dose of catalyst, 1.0 mM PMS, and at pH 6.0, adhering to pseudo-first-order kinetics with a rate constant of 0.194 min −1 . Radical quenching and electron paramagnetic resonance (EPR) studies confirmed that sulfate radicals (SO 4 •- ), hydroxyl radicals (OH • ), and singlet oxygen ( 1 O₂) were the primary reactive species engaged in DCF breakdown. The catalyst demonstrated exceptional structural stability and reusability over five consecutive cycles, with negligible cobalt leaching. Furthermore, Co/CNR-2 has demonstrated considerable degradation efficiency for several drugs, highlighting its broad applicability. This study presents innovative insights into the rational design of MOF-derived carbon-based catalysts and recognizes Co/CNRs as a feasible and sustainable platform for the PMS-mediated degradation of emerging organic contaminants.
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DOI
高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Yingxuan Cao,Zhuoao Li,Pengbo Ding,Lixiu Guan,Zixiang Bai,Chenghao Yuan,Junguang Tao
The development of cost-effective and high-performance electrocatalysts for the hydrogen evolution reaction (HER) is crucial for sustainable energy systems. Herein, we report a novel Co-MOF-derived MoS 2 CoS 2 /CoSO 4 composite on carbon cloth, synthesized through a controlled hydrothermal and thermal activation process. This catalyst achieves a low overpotential of 36 mV at 10 mA cm −2 and a Tafel slope of 36 mV dec −1 in 1 M KOH, rivaling commercial Pt/C. By managing the preparation temperature, we preserved the MOF structure’s integrity, maintaining a high specific surface area. Sulfurization at 450 °C enhanced electron transfer and prevented nanoparticle aggregation. The catalyst demonstrates remarkable stability over 175 h, attributed to the Co-Mo bimetallic synergy and in-situ composite formation, which optimize hydrogen adsorption and electron transfer. Importantly, we explored how sulfur source modulation affects active site formation and activity. Lower sulfur levels hinder CoS 2 formation, resulting in sparse sites and inferior performance, while optimal sulfur ensures dense composite growth. This study emphasizes the importance of local ionic dynamics in shaping catalyst microstructure and provides a universal method for designing non-precious metal electrocatalysts through ionic distribution engineering.
研究领域:
材料科学
·
能源化学
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DOI
高影响因子
CARBON
·
2025
·
IF 11.6
Yuan Liu,Rong Li,Muhe Li,Yuchang Qing
The resin matrix composite endowed with wide-frequency (4–18 GHz) absorption functionality remains a challenging issue in the current research of microwave absorption materials. Herein, we have developed coral-like Co@NCP reinforced polylactic acid resin (PLA) composites featuring wide-band absorption through cross-scale design, thereby breaking through the current bottleneck of narrow effective absorption band (EAB). Multiple electromagnetic (EM) loss mechanisms, encompassing conductivity loss, dipole polarization, interface polarization and coupling effect were established and optimized by conducting Co-doped defect design at the atomic scale, CoC x -Co x P heterogeneous interface design at the nano scale and periodic design at the millimeter scale. The wide absorption in the frequency of 2.0–17.4 GHz of Co@NCP composite is accomplished by the frequency response characteristic of the cooperative multiple absorption mechanism. Accordingly, combined with special cylindrical periodic structure design, the metamaterial absorbers exhibit remarkable EM wave absorption performance (e.g., actual EAB in 15.4 GHz and simulated reflectivity in −65.5 dB). Moreover, large-scale production of the metamaterial absorbers at low costs are realized, which has tremendous application potentiality for developing EM wave absorbers with superior performance.
研究领域:
材料科学
·
电磁学
·
微波吸收
·
超材料
·
纳米技术
·
聚合物复合材料
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Dongmei Lv,Shibiao Su,Shifan Zhang,Dandan Cai
The anchor of functional materials on metal-organic frameworks (MOFs) nanosheets to precisely construct fascinated heterostructures for electrocatalysis is highly promising but challenging owing to the different interfacial thermodynamics and nucleation kinetics. In this work, we design and synthesize ultrafine metal oxides nanoparticles (NPs) homogenously distributed on cobalt-based MOF (Co-MOF) nanosheets for oxygen evolution reaction (OER) by a facile solvothermal reaction and subsequent partially controlled pyrolysis. The ultrafine Co 3 O 4 NPs with a particle size of about 1.5 nm can be obtained from the dispersed elemental Co in Co-MOF and uniformly generated on the surface of the MOF, which is crucial for the formation of the unique heterostructure. The well-designed Co-MOF-350 exhibits an efficient electrocatalytic activity with a low overpotential of 239 mV at a current density of 10 mA cm −2 and a small Tafel slope of 63 mV dec −1 , and an outstanding catalytic stability for OER, much superior to the pure Co-MOF and Co 3 O 4 electrocatalyst . The intriguing OER performance mainly originates from the desirable combination of the abundant active sites, the extended electron transport channel between ultrafine metal oxides and Co-MOF nanosheets. More importantly, the work will help to design novel heteroarchitectured MOFs-based composites as efficient and robust electrocatalysts for practical applications.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Yun Zhang,Runhe He,Hao Liu,Haihui Liu,Xing-xiang Zhang
In this work, a high-temperature-tolerant poly(vinylidene fluoride-hexafluoropropylene) (PVDF-HFP)-based gel polymer electrolyte (GPE) separator was fabricated for lithium-sulfurized poly(acrylonitrile) (Li-SPAN) batteries through a one-step electrospinning process. The ZIF-67/PMIA@PVDF-HFP (MOF-PPH) separator, enhanced by the synergistic effects of ZIF-67 and poly( m -phenylene isophthalamide) (PMIA), exhibited remarkable thermal stability, maintaining dimensional integrity at 200 °C, robust tensile strength (14.96 MPa), and superior electrolyte absorption (704 %). In addition, abundantly dispersed ZIF-67 nanoparticles, characterized by a uniform microporous size and high specific surface area, facilitated the uniform deposition of Li + and effectively suppressed the disordered growth of lithium dendrites. The Li-SPAN battery equipped with the MOF-PPH separator demonstrated significantly improved cycling stability, with a discharge capacity of 1406.1 mAh g −1 and a capacity retention rate of 95.6 % after 200 cycles at 0.2 C. Furthermore, the MOF-PPH separator showed steady cycling behavior, even under high sulfur loading, lean electrolyte, and elevated operating temperature conditions. This result highlights its potential for future energy storage systems that provide high safety and performance.
研究领域:
材料科学
·
电化学
·
能源存储技术
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产品关联
DOI
高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
·
2021
·
IF 3.498
Ping-Ping Sun,Yu-Hang Zhang,Hongwei Shi,Fa-Nian Shi
A new 3-D Co-MOF with the molecular formula of C 10 H 8 Co 3 N 4 O 12 was prepared by hydrothermal method . As the anode for lithium ion battery , the electrode modified with 20% copper powder (Co-MOF-20) shows the specific capacity of 1138.5 mAh g −1 at 100 mA g −1 . Even under the high current test of 500 mA g −1 , Co-MOF-20 also shown excellent performance (349.6 mAh g −1 ) after 300 cycles. The advantages of Co-MOF-20 electrode are not only due to the introduction of copper powder conductive agent, but also the existence of three-dimensional structure which can provide ion transport channels.
研究领域:
材料科学
·
能源科学
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产品关联
DOI
高影响因子
JOURNAL OF RARE EARTHS
·
2023
·
IF 4.9
Shiyong Xu,Mei Li,Yijun Wang,Caiyun Gao,Rongsheng Xu,Zhiliang Jin
A novel composite photocatalyst for photocatalytic decomposition of water for hydrogen evolution was successfully synthesized by in-situ growth of nitrogen and sulfur co-doped coal-based carbon quantum dots (NSCQDs) nanoparticles on the surface of sheet cobalt-based metal-organic framework (Co-MOF) and graphitic carbon nitride (g-C 3 N 4 , CN). The structure and properties of the obtained catalysts were systematically analyzed. NSCQDs effectively broaden the absorption of Co-MOF and CN in the visible region. The new composite photocatalyst has high hydrogen production activity and the hydrogen production rate reaches 6254 μmol/(g·h) at pH = 9. At the same time, NSCQDs synergy Co-MOF/CN composites have good stability. After four cycles of hydrogen production, the performance remains relatively stable. The transient photocurrent response and Nyquist plot experimental results further demonstrate the improvement of carrier separation efficiency in composite catalysts. The semiconductor type (n-type semiconductor) of the single-phase catalyst was determined by the Mott-Schottky test, and the band structure was analyzed. The conductive and valence bands of CN are −0.99 and 1.72 eV, respectively, and the conduction and valence bands of Co-MOF are −1.85 and 1.33 eV, respectively. The mechanism of the photocatalytic reaction can be inferred, that is, Z-type heterojunction is formed between CN and Co-MOF, and NSCQDs was used as cocatalyst.
研究领域:
材料科学
·
能源化学
·
环境科学
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Mengyi Zhang,Xiaohui Sun,Xudong Cai,Xiaolu Zhan,Yufei Wu,Xuyang Zhang,Guohua Wu,Xiangwei Wang
In the field of electromagnetic wave (EMW) absorption, carbon matrix materials based on metal–organic frameworks (MOFs) have drawn more interest as a result of their outstanding advantages, such as porous structure, lightweight, controlled morphology, etc. However, how to broaden the effective absorption bandwidth [EAB; reflection loss (RL) ≤ −10 dB] is still a challenge. In this paper, large microsphere structures of a Co/C composite composed of small particle clusters were successfully prepared by the solvothermal method and annealing treatment. At a filling ratio of 40 wt %, the Co/C composite shows attractive microwave absorption (MA) performance after being annealed at 600 °C in an atmosphere of argon. With an EAB of 6.32 GHz (9.92–16.24 GHz) and a thickness of just 2.57 mm, the minimum RL can be attained at −54.55 dB. Most importantly, the EAB can attain 7.12 GHz (10.88–18.0 GHz) when the thickness is 2.38 mm, which is larger than that of the majority of MOF-derived composites. The superior MA performance is strongly related to excellent impedance matching and a higher attenuation constant. This study provides a simple strategy for synthesizing a MOF-derived Co/C composite with a wide EAB.
研究领域:
材料科学
·
电磁学
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产品关联
DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2024
·Vol. 191
·期 8
·1-12
·
IF 5.3
Miao Fengjuan,Lu Yanan,Tao Bairui,Zhao Man,Chu Paul K.
Dual-functional nanomaterial electrodes have the capability to satisfy the requirements for both sweat analysis and the hydrogen evolution reaction (HER), thereby enabling the integration of electrochemical sensing and hydrogen production. In this study, ZIF-67 cubes are synthesized on nickel foam (NF), while TiO 2 is obtained through an annealing process. Subsequently, the ZIF-67@TiO 2 /MoS 2 nanocomposite is fabricated on nickel foam via a hydrothermal method. This composite material exhibits exceptional photocatalytic properties and is also suitable for the detection of glucose in sweat. The glucose detection range spans from 10 nM to 10 mM with a sensitivity of 7.24 μA mM −1 cm − 2 for a signal-to-noise ratio of 3 and a detection limit of 0.43 μM. Moreover, when utilized as a hydrogen evolution electrode, this material demonstrates a current density of 10 mA cm -2 at an overpotential of 118 mV, with a Tafel slope of 73 mV/dec. The synthesis process is both straightforward and economical. This research introduces a novel concept for the design of multifunctional chemical sensors. Graphical Abstract
研究领域:
材料科学
·
电化学
·
生物传感
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Muhammad Sohail Asghar,Muhammad Sultan Irshad,Zainab Elqahtani,Tahira Shabbir,Naila Arshad,Muneerah Alomar,Ghazala Maqsood,Muhammad Atif Ali,Muhammad Sabir,Jinhua Li,Jian Zhang,Fuchao Yang,Zhiguang Guo
Simultaneous freshwater and electricity generation from solar evaporation presents a promising strategy for addressing water-energy scarcity. However, existing devices typically suffer from fixed functionality and compromised performance in either mode. This work introduces a novel symmetric-asymmetric solar evaporator enabling switchable harvesting of both freshwater and electricity on demand. Herein, the device leverages a reversible structural transition: symmetric configuration (indirect) for high-efficiency solar desalination 2.14 kg m −2 h −1 , photo-thermoelectric generation (Vout ∼308 mV, Iout ∼71 mA), and asymmetric configuration (direct) for spontaneous electricity generation (Vout ∼364 mV, Iout ∼78 mA), and an evaporation rate of 1.41 kg m −2 h −1 under 1 kWm −2 . This dual-mode operation is achieved through a simple, scalable nanomaterial design facilitating thermal-gradient behavior in both modes. State of-the-art experimental investigations were performed to assess the reproducibility, switching behavior, and long-term stability. The successful outdoor results under natural conditions enabled dual-mode solar evaporators as an effective strategy to harvest solar energy as well as waste heat for concurrent freshwater and electricity generation. More importantly, heat transfer simulations were effectively carried out to scrutinize the energy flow in dual-mode solar evaporators. This study demonstrates a highly effective approach to overcome the limitations of traditional solar interfacial evaporation and generate dual-mode in situ thermoelectricity and stable desalination under natural conditions.
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高影响因子
危险品化学品经营许可证（带存储）