PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2025
·
IF 2.9
Jiaqi Li,Yidan Zhang,Pingyu Luo,Chun Li,Fanming Zeng,Tiantian Sun,Hanhui Lei,Xiaoteng Liu,Chunbo Liu
Persulphate-based advanced oxidation technology efficiently and cost-effectively removes organic dyes from water but designing stable photocatalytic systems and understanding their reaction mechanisms remain key challenges. Metal–organic frameworks (MOFs) have attracted considerable research attention for degrading organic pollutants owing to their high porosity, tunable structure, and ease of modification. In this study, a series of M-MOF-74 (M = Co, Fe, Ni) photocatalysts are synthesized by a hydrothermal method for methylene blue (MB) degradation. Among them, the Co-MOF-74 photocatalytic synergetic peroxymonosulfate system exhibits high catalytic activity after 30 min of visible light irradiation. MB degradation efficiency reaches 94.8%, and the reaction rate constant is 0.210 min−1, which is approximately 19.44 times higher than the reaction rate constant of the original Co-MOF-74. Compared with Fe-MOF-74 and Ni-MOF-74, Co-MOF-74 exhibits better photocatalytic performance due to the dynamic changes in the valence state of cobalt, which more effectively facilitate the activation of PMS. In addition, this study analyses the possible degradation pathways of MB in water and toxicological evaluations of intermediate products, providing new insights for the effective removal of dyes in water.
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DOI
PubMed
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2025
·
IF 6.2
Jinyu Wu,Zhongyan Wang,Kelan Zhang,Ze Wu,Lingyi Meng,Heng Chen,Xiaoxia Hu,Xiaohui Ma,Anran Guo
For continuing to explore new high-entropy materials, the first high-entropy ilmenite-phase titanate, (Mg,Co,Ni,Zn)TiO 3 , is synthesized in this work, further introducing a new crystal structure type for high-entropy ceramics. The uniform chemical composition and typical ilmenite-phase structure of high-entropy (Mg,Co,Ni,Zn)TiO 3 are verified by XRD, SEM, TEM, EDS, and XPS. Homogeneous element distribution and magnetically-coupled atomic arrangement are further performed using Rietveld refinement, Raman spectral fitting, and high-resolution STEM. On this basis, complementary density functional theory simulation with Hubbard correction (DFT + U) is conducted to reveal the band structure and a 2.529 eV bandgap of high-entropy (Mg,Co,Ni,Zn)TiO 3 , thereby enhancing the potential for high emissivity and electronic applications. Excellent thermal stability at 1000–1200 °C, a low thermal conductivity of 2.365 W·m⁻¹·K⁻¹ at room temperature, a high hemispherical emissivity of 0.93 within the 3–14 μm wavelength range, and a low dielectric constant of 22.23 are also demonstrated.
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APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Binkai Yuan,Guibin Tan,Gengzhe Shen,Liuyan Zhang,Xinyu Tian,Yang Yang,Suye Li,Yidong Huang,Xingyu Zhu,Zeyi Guan,Fujian Guo,Yanmei Zhang
To overcome waterborne epoxy coating’s limitations (poor long-term corrosion resistance, insufficient self-healing, microdefect-induced penetration), this study developed a high-performance smart anti-corrosion coating modified with MXene-Ni@C-ODD composite filler and regulated by magnetic field. The filler was facilely prepared via pyrolysis of MXene-Ni-MOFs (Ti 3 C 2 T x −Ni 3 HHTP 2 ) and subsequent loading of ODD(1-(2-Aminoethyl)-2-heptadecenyl-2-imidazoline, diethylsulfate salt). Electrochemical tests in 3.5 wt% NaCl showed the magnetically regulated (MMO) coating exhibited optimal performance, outperforming Blank, ODD, and MO coatings: after 60-day immersion, its achieved a charge transfer resistance ( R ct ) of 1.02 × 10 10 Ω·cm 2 (7.2 times that of the Blank coating; corrosion current density ( i corr ) of 1.78 × 10 −13 A·cm −2 (1/2.6 of that of the Blank coating) and corrosion potential ( E corr ) of −0.1791 V. MXene-Ni@C’s mesoporous structure (specific surface area: 147.812 m 2 /g) mitigates ODD-induced epoxy curing interference and enables responsive ODD release, while its ferromagnetism (saturation magnetization: 10.59 emu/g) allows magnetic field-driven parallel filler alignment. Scratch tests confirmed self-healing ability via ODD release triggered by exposed metal substrate’s electronegativity. This “magnetically enhanced physical barrier + ODD self-healing” synergy support for high-performance smart anti-corrosion coatings.
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高影响因子
Metals
·
2025
·Vol. 15
·期 12
·1320
·
IF 2.5
Xinyi Yuan,Rongcheng Sheng,Yizhe Du,Dengfu Chen,Mujun Long,Huamei Duan
To address the demands of modern high-speed and high-quality continuous casting production, depositing high-performance coatings on the surface of mold copper plates is critically important for extending the service life of continuous casting molds. To this end, a Ni-Co-Cr/SiC nanocomposite coating was developed, and cryogenic treatment was applied to further improve its hardness and wear resistance. This work systematically investigates the microstructural evolution and performance enhancement of the Ni-Co-Cr/SiC nanocomposite coating under different cryogenic treatment parameters, with special emphasis on the effects of treatment temperature on the coating’s microstructure, hardness, wear resistance, and adhesion to the substrate. The results demonstrate that decreasing the cryogenic treatment temperature and extending the holding time effectively refine the grains of the coating while simultaneously promoting the accumulation of microstrain and dislocation density. These changes lead to significant improvements in hardness, wear resistance, and interfacial bonding performance. Specifically, after direct immersion at −196 °C for 16 h, the coating reached a hardness value of 946.5 HV, and the wear rate was reduced to 0.032 mm3·(N·m)−1, representing only 54.6% of that of the untreated coating. The dominant wear mechanism transitioned to a mixed mode of abrasive wear and oxidative wear. Moreover, the cryogenic treatment enhanced the stability of the coating-substrate adhesion.
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高影响因子
Nanomaterials
·
2025
·Vol. 15
·期 24
·
IF 4.3
Luan Liu,Hongru Liu,Zikang Chen,Genghua Cao,Xiaoyu Wu,Baorui Jia,Xuanhui Qu,Mingli Qin
A rapid solvent-free microwave-assisted strategy was developed to fabricate Pt- and Ni-modified Co(OH)2catalysts for alkaline hydrogen evolution. Among them, Ni-Pt@Co(OH)2, prepared via sequential Ni-first then Pt loading, exhibited the best performance. Structural analyses confirmed uniform Pt dispersion with dominant Pt(111) facets, while ICP-MS showed reduced Pt usage compared to Pt@Co(OH)2. Electrochemical measurements in 1.0 M KOH revealed an overpotential of 71 mV at 10 mA·cm−2, comparable to Pt/C, and a mass activity 4–6.5 times higher across 25–75 mV. EIS demonstrated lower charge-transfer resistance, and stability tests showed negligible degradation after 3000 CV cycles and 11 h continuous operation. The outstanding performance arises from enhanced Pt utilization, abundant conductive sites, and strong Ni-Pt interfacial synergy, highlighting Ni-Pt@Co(OH)2as a promising catalyst for efficient alkaline HER with reduced Pt consumption.
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PubMed
高影响因子
RARE METALS
·
2025
·
IF 11
Haoran Li,Xin Li,Qilin Gu,Shiyou Zheng
en Transition metal-based amorphous/crystalline (a/c) heterostructured catalysts have garnered significant attention due to their exceptional activity, stability, and cost-effectiveness. However, the precise synergistic regulation of interfacial composition and phase states remains challenging. Herein, we propose an innovative strategy for the controllable synthesis of a/c heterostructures using MIL-100(Mn) template. By leveraging the intrinsic coordination disparity between Ni 2+ and Fe 3+ to drive phase separation, combined with F − mediated ion exchange-phosphidation synergy, we successfully constructed an amorphous FeP x /crystalline Ni 2 P heterostructure (a-(F, Fe)P x /Ni 2 P) with precise compositional control. Systematic investigations reveal that F − not only enhances metal ion exchange through complex stabilization but also induces amorphous/crystalline phase separation via electronic modulation. Meanwhile, a deep reconstruction process occurs under high voltage, transforming the catalyst into active F-Fe/NiOOH species, which further enhances the catalytic activity and durability. Benefiting from the synergistic effects of heterointerface electronic coupling and deep reconstruction, the as-prepared a-(F, Fe)P x /Ni 2 P catalyst exhibits exceptional oxygen evolution reaction (OER) performance in 1 M KOH, delivering an ultralow overpotential of 278 mV at 30 mA cm −2 and maintaining excellent stability over 100 h with negligible degradation. This work establishes a novel “coordination difference-driven, fluorine-mediated” interface engineering strategy, offering valuable insights for the rational design of high-performance heterostructured electrocatalysts. 摘要 zh 基于过渡金属的非晶/晶体异质结构催化剂因其卓越的活性、稳定性和成本效益而备受关注。然而,对其界面组成与相态的精确协同调控仍面临挑战。在此,我们提出了一种利用MIL-100(Mn)模板可控合成非晶/晶体异质结构的新颖策略。通过利用Ni 2+ 与Fe 3+ 之间的本征配位差异驱动相分离,并结合F − 介导的离子交换-磷化协同作用,我们成功构建了具有精确组分调控的非晶FeP x /晶体Ni 2 P异质结构(标记为a-(F, Fe) P x /Ni 2 P)。系统研究表明,F − 不仅通过络合稳定作用增强了金属离子交换效率,还通过电子调控诱导了非晶/晶体相分离。同时,催化剂在高电位下发生深度重构过程,转变为活性的F-Fe/NiOOH物种,从而进一步增强了催化活性与耐久性。受益于异质界面电子耦合与深度重构的协同效应,所制备的a-(F, Fe)P x /Ni 2 P催化剂在1 M KOH电解液中表现出优异的析氧反应性能,在30 mA cm −2 电流密度下仅需278 mV的极低过电位,并能稳定运行超过100 h而无明显衰减。本研究确立了一种全新的“配位差异驱动、氟离子介导”的界面工程策略,为合理设计高性能异质结构电催化剂提供了有价值的见解。
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高影响因子
TALANTA
·
2022
·
IF 6.556
Lili Xiao,Kaixiu Yang,Jiaxing Duan,SiYan Zheng,Jin Jiang
In this work, spherical Ni-based metal-organic frameworks (Ni-MOFs) were used as precursors for preparing nanorod-like nickel phosphate (r-NiPO) with enhanced electro-catalytic properties in detection of glucose. It was found that the addition of nickel ion has a profound effect on construction of nickel phosphate with flower-like, rod-like, and ribbon-like structure in presence of H 2 PO 2 − . The r-NiPO consisted of multiple phases of nickel phosphate showed porous, interconnected structure and abundant active Ni(II)/Ni(III) pairs, which was beneficial to facilitate glucose oxidation. In comparison with Ni-MOF, r-NiPO exhibited the superior electrocatalytic property on oxidation of glucose because of the exposing more active Ni sites in r-NiPO than that of Ni-MOF precursor. r-NiPO modified glassy carbon electrode (r-NiPO/GCE) showed a good linear response to glucose from 1.0 μM to 3.0 mM with a high sensitivity of 3169 μA mM −1 cm −2 . In addition, r-NiPO/GCE can be used to detect glucose in human serum with satisfactory recoveries (90–97%).
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Sain Bux Jamali,Tauqeer Haidar Qamar,Sibt ul Hassan,Lei Ma,Pengkun Xia,Xuejun Zhang,M. Mateen,Shengxiang Huang,Lianwen Deng
Nitrogen-doped porous carbon nanocomposites are highly sought-after materials for electromagnetic wave absorption due to their unique combination of electrical and magnetic properties. However, achieving optimal absorption performance within the critical C-band (4–8 GHz) frequency range remains a significant challenge. Ni@NPC nanocomposites, synthesized through the polymer bubbling technique, demonstrated exceptional microwave absorption (MWA) performance in the C-band. These materials exhibited a reflection loss (RL) of −65.20 dB at a thickness of 4.8 mm. When carbonized at 600 °C, a thickness of 2.0 mm achieved an effective absorption bandwidth (EAB) of 5.74 GHz. The remarkable absorption performance is ascribed to the combined effect of their porous composition and the addition of nitrogen dopants, which efficiently foster various microwave attenuation processes. Furthermore, the material’s effectiveness in real-world applications was evaluated using computer simulation technology (CST). This work highlights the potential of the one-pot fabrication method for developing high-performance MWA materials with practical applications.
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高影响因子
CORROSION SCIENCE
·
2024
·
IF 7.4
Zebang He,Zhong Wu,Zhiming Gao,Zhenbo Qin,Juntao Yuan,Yuan Gao,Yaorong Feng,Anqing Fu,Chun Wang,Wenbin Hu
A Ni-Al-Cu coating was prepared on NAB alloy through electroplating and heat treatment, and the erosion-corrosion behaviors were investigated. The results demonstrated that Ni-Al-Cu coating exhibited higher erosion resistance compared to NAB alloy, with an average reduction of 63 % in material removal rate (MRR). It was revealed that deformation and cracks were observed in NAB, with loss of hard κ and β phases alongside deformation of ductile α phase. Meanwhile, Ni-Al-Cu coating experienced fatigue delamination and grain disintegration due to alternating stress. Taguchi design method showed that increasing flow velocity and sand concentration could enhance the intensity of gravel impact, while changes in the erosion angle affected gravel impact modes and energy transfer, thereby impacting corrosion performance. Additionally, empirical equations for the material removal rate were derived through regression analysis, which became possible to predict the MRR under different influencing factors and assess the erosion-corrosion resistance of materials.
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高影响因子
Nano Select
·
2023
·
IF 0
Jianyi Xu,Guofang Zhang,Xin Zhao,Feng Hu,Dandan Ke
In this study, the perovskite-type oxide LaFeO 3 is treated by electroless Ni deposition with different reaction time and the electrochemical properties of the resulting material are investigated as the anode for MH-Ni batteries. XRD, SEM, and TEM measurements reveal a uniform deposition of crystalline nickel on the oxide surface and a clear increase in the amount of Ni coating with the deposition time. The electrochemical analysis shows that the electroless deposition can significantly improve the maximum discharge capacity of the battery. Furthermore, the coated electrodes exhibit excellent activation performance and superior cyclic stability. With the increase in the reaction temperature, improvements in the discharge ability, exchange current density, and diffusing coefficient of hydrogen are also observed.
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DOI
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Ze-Wei Wu,Jing Xiong,Cun-Wen Wang,Yuan-Hang Qin
Although supported Ni is generally considered the most active non-noble metal catalyst for decomposing NH 3 to produce CO x -free H 2 , its activity is not sufficient. Herein, supporting high-loading Ni on SBA-15 is explored to alleviate the low intrinsic activity issue of Ni. SBA-15 supports with tunable textual properties are synthesized to support Ni catalyst for NH 3 decomposition. Characterization shows that Ni catalyst with a loading close to 40 wt% supported on SBA-15 with the largest specific surface area (Ni/SBA-15-80) exhibits a NH 3 decomposition performance much better than those reported on other Ni-based NH 3 decomposition catalysts, resulting from its favorable textural properties and high Ni loading. In addition, Ni/SBA-15-80 shows excellent catalytic stability, with no activity degradation over an 80-h NH 3 decomposition test. This work reveals the importance of textural properties of support and Ni loading to NH 3 decomposition performance and can provide a new idea for synthesizing high-performance NH 3 decomposition catalysts.
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高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2021
·
IF 4.158
Xiaoli Feng,Haifeng Wang,Xuechao Liu,Canming Wang,Hongzhi Cui,Qiang Song,Kun Huang,Neng Li,Xue Jiang
Inconel 625 + x Al ( x = 0, 2.5, 5.0, 7.5, 10.0) alloy coatings were prepared by laser cladding. The addition of Al promoted the formation of the BCC phase, which changed the coating microstructure from an FCC + δ phase + Laves phase to FCC + BCC + δ phase + Laves phase. Inconel 625 + 2.5 Al alloy showed the greatest corrosion resistance among all samples. The formation of an Al 2 O 3 film improved the corrosion resistance of the coating, but excess Al decreased the Cr 2 O 3 content in the film, which decreased the corrosion resistance of the coating. Increasing the Al content aggravated the lattice distortion and improved the solid solution strengthening effect, while also increasing the amount of BCC phase, which improved the coating hardness. After adding Al, the Inconel 625 + x Al alloy coatings displayed strong plastic deformation resistance, and their wear resistance was improved due to the presence of a hard phase.
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