SEPARATION AND PURIFICATION TECHNOLOGY
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2025
·
IF 9
Zonglin Pan,Xinyu Liu,Ruisong Xu,Xinyuan Zhou,Hang Yu,Lin Li,Yintao Yu,Chengwen Song,Tonghua Wang
Constructing high-performance catalytic membrane materials for addressing antibiotic wastewater pollution is of great significance. In this work, a Mn-doped FeOCl functionalized carbon catalytic membrane (CM-FM) was successfully fabricated by immobilizing a Mn-doped FeOCl catalyst onto a low-cost coal-based porous carbon membrane through a straightforward co-impregnation and calcination approach. A systematic investigation was conducted on the effects of key preparation parameters, including the doping ratio and precursor concentration. Results demonstrated that the CM-FM prepared with a Mn:Fe doping ratio of 1:8 and a precursor concentration of 7 wt% exhibited optimal catalytic performance. Under these conditions, the H₂O₂ decomposition efficiency reached 83.5 %, significantly higher than that of the pristine CM (14 %) and CM-FeOCl (78 %). Moreover, the removal efficiencies of tetracycline (TC) and total organic carbon (TOC) were considerably enhanced, achieving 97 % and 48.5 %, respectively. The influence of operational parameters on the catalytic degradation of TC by CM-FM was also examined, confirming its good applicability across different water matrices. Mechanistic studies revealed that Mn doping promotes the catalytic activation of H₂O₂ by the membrane, leading to increased generation of hydroxyl radicals (·OH) and singlet oxygen ( 1 O₂). Based on HPLC-MS analysis, potential TC degradation pathways during the catalytic process were proposed. Additionally, ECOSAR software was employed to evaluate changes in the toxicity of degradation products in the permeate solution after catalytic treatment, providing an assessment of the environmental impact reduction.
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Molecular Catalysis
·
2025
·
IF 4.9
Qiuju Qin,Chaolian Zhu,Donghai Mo,Zhengjun Chen,Lihui Dong,Bin Li,Liya Zhou
MnO x exhibits excellent low temperature activity for degradation NO x , but its poor SO 2 tolerance restrains its application. Herein, an in situ construction method for MnO x loading on Mn-doped ZrO 2 carrier with carbon (MnO x /Mn-ZrO 2 -C) derived from Mn(NO 3 ) 2 /UIO-66 by in situ doped pyrolysis–oxidation, in which Mn replaces Zr to modify the electronic structure of the ZrO 2 . The MnO x /Mn-ZrO 2 -C with abundant surface oxygen and acid sites showed excellent activity and better SO 2 resistance. A series of characterization results indicated that Mn doping modulates the electron structure of carrier ZrO 2 and enhances the interactions among MnO x , carbon, and Mn-ZrO 2 , resulting in increasing the electron cloud density around Mn and Zr, and consequently, the Mn and Zr on the MnO x /Mn-ZrO 2 -C exhibit poorer sulfiphilic. These findings emphasize the benefits of utilizing a multipronged effect to fabricate highly active and sulfur-resistant NH 3 -SCR catalysts.
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2025
·Vol. 60
·期 21
·8720-8733
·
IF 3.9
Zhang Wen-hua,Yi Bing,He Wen-xin,Ma Xiu-jia,Jia Yun-bo,Li Shi-qi,Guo Cai-wen,Wang Xue-wei
Industrial catalysts for the oxygen evolution reaction (OER) of water electrolysis are key to realizing green and clean hydrogen production. In this study, multivariate transition metal hydroxide catalysts with high-entropy structure were prepared, which exhibited optimized electrocatalytic performance and stability for water splitting in alkaline media. Using copper foam as the substrate, samples are obtained through the step-by-step combination and tuning of the multi-components. The electrochemical performance test results show that the optimized FeCoCuMoMnOOH catalyst exhibits an exceptional catalytic effect for the OER with an overpotential of 227 mV at a current density of 100 mA/cm 2 , much superior to the performance of FeCoCuOOH and FeCoCuMoOOH. In the 30-h timed current method test, the performance of the FeCoCuMoMnOOH catalyst is essentially non-decaying and shows good stability. The XPS results indicate that the metal components are stably combined to exist as a mixture of metal phases in the samples, which exerts a beneficial synergistic effect and offers more active sites. Meanwhile, Mn as an electron donor can increase the electron density and optimize the electron transport structure, which is conducive to the electrochemical reaction rate. This work sheds light on presenting an effective strategy for constructing multi-element high-entropy combinations with modulated component ratios, which provides a new idea for designing efficient and stable transition metal hydroxyl oxide catalysts. Graphical abstract
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Nanoscale
·
2025
·
IF 5.1
Manoj Kumar Panjwani,Yuqi Liu,Shihao Han,Danish Khan,Shaoxia Yang,Feng Xiao,Pan Gao
Dual-atom catalysts (DACs) driven by peroxymonosulfate (PMS) activation have demonstrated significant potential for addressing the inherent scaling relationship limitation of reaction intermediates, but in-depth mechanistic insight into synergistic interactions between dual-metal sites remains elusive. The Fe–Mn DAC has been designed with the largest electronegativity difference among Fe-based metal pairs to enhance electron transfer and synergistic interactions. The Fe–Mn DAC exhibits exceptional catalytic performance for bisphenol A (BPA) degradation, achieving a reaction rate constant (kobs) of 1.36 min−1, and a turnover frequency to PMS concentration ratio of 34.0 L min−1 g−2, which significantly surpasses the performance of reported state-of-the-art DACs, SACs, and nanocatalysts. The log kobs value correlated well with the σ+ value (R2 = 0.80), indicating that the Fe–Mn DAC readily targets pollutants with strong electron-donating abilities. Besides, 1O2 plays a key role in the Fe–Mn DAC/PMS system for BPA degradation. Based on density functional theory calculations, Fe and Mn active sites with a large electronegativity difference effectively enhance the synergistic interactions and decouple the activation and stabilization of reaction intermediates to address the inherent scaling relationship limitation. This study provides a robust framework for the rational design of DACs to enable efficient and sustainable water treatment.
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DOI
PubMed
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Jiangang Kang,Haihong Zhang,Yuehui He,Liang Wu,Hengdi Ye,Jinchao Wei
The novel Ni-Si intermetallic compounds are fabricated by elemental powder metallurgy. This study explores the synthesis of a series of catalysts (Ni-Si-M, M=Co, Fe, Mn) by alloying to augment the low-temperature efficiency of CO oxidation using Ni-Si intermetallic compounds. It is found the low-temperature catalytic activity of Ni-Si-Co, Ni-Si-Fe, and Ni-Si-Mn catalysts are significantly enhanced compared to the original Ni-Si. The catalytic activity among the catalysts ranks as follows: Ni-Si-Co > Ni-Si-Fe > Ni-Si-Mn > Ni-Si. The apparent activation energy (Ea) for Ni-Si-Co was the lowest at 57.3 kJ/mol, suggesting its efficient catalytic oxidation of CO. Additionally, the addition of Co, Fe and Mn elements actually promotes the generation of Ni 2+ as the CO adsorption site in the original Ni-Si. The addition of Co element also leads to the formation of Co 2+ as the adsorption site of O 2 in the process of CO oxidation reaction. The synergistic adsorption of Ni 2+ and Co 2+ to CO and O 2 promotes the CO oxidation reaction. Additionally, the catalysts demonstrate robust long-term stability in atmospheres containing H 2 O and SO 2 , with CO conversion initially suppressed but subsequently recovering and stabilizing at over 90%. This investigation offers novel insights into enhancing the low-temperature activity and stability of catalysts.
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高影响因子
CERAMICS INTERNATIONAL
·
2025
·Vol. 51
·期 25
·45661-45668
·
IF 5.6
Yuyu Liu,Fan Zhang,Rui Zhu,Weijin Chen,Yue Zheng
It is well known that doping can significantly affect the dielectric and eletromechanical properties of perovskite ferroelectrics like BaTiO 3 . However, the influence of transition group element doping on the flexoelectric property of BaTiO 3 -based ceramics remains poorly studied. Here, we made a comparative investigation on the flexoelectric property of BaTiO 3 -based ceramics doped by transition group elements V, Mn and Ni. The phase composition, crystal structure, and average grain size of the ceramics were determined using X-ray diffraction refinement and scanning electron microscopy. It shows that the samples all exhibit dense and uniform microstructures with clear grain boundaries, but they have different average grain sizes ranging from 15 to 59 μm. Ceramics with larger average grain sizes exhibit higher dielectric constants and Curie temperatures. While the flexoelectric coefficient of Ni-doped, V-doped and pure BaTiO 3 ceramics varies from 15.36 μC/m to 60.37 μC/m, showing positive correlation with average grain sizes, that of the Mn doped BaTiO 3 ceramic which has the largest average grain size (59 μm) is rather small (19.01 μC/m). We suggest that the increased conductivity of ceramics suppresses the flexoelectric effect. The factors determining the flexoelectric coefficient of BaTiO 3 based ceramics doped by transition group elements should include electrical conductivity in addition to dielectric constant which is further affected by grain size. Our work gains new insight into the flexoelectric effect in perovskite oxide ceramics.
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INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Jianwei Gao,Xiaoqing Si,Mingshen Li,Pengpeng Xue,Bo Yang,Chun Li,Junlei Qi,Jian Cao
Microwave-sintered Ni-doped Mn–Co spinel coatings were developed as advanced protective layers for solid oxide fuel cell (SOFC) interconnects. By systematically varying the Ni content (in MnCo 2-x Ni x O 4 , x = 0–0.5), we demonstrate that Ni incorporation significantly alters cation valence distributions and oxygen vacancy concentrations, leading to a substantial reduction in the thickness of Cr-containing oxide layers compared to undoped coatings. Among the compositions studied, the MnCo 1.7 Ni 0.3 O 4 coating exhibited the best performance, maintaining an area-specific resistance (ASR) below 20 mΩ cm 2 after 500 h at 800 °C, indicating excellent electrical conductivity and long-term stability. Crystal field analysis revealed that Ni doping not only suppresses the Jahn-Teller distortion of Mn 3+ but also enhances configurational entropy, thereby stabilizing the spinel structure against Cr diffusion. These findings establish entropy engineering via Ni substitution as a viable strategy for designing thermodynamically robust, electrically conductive, and Cr-resistant coatings, offering a promising pathway for durable SOFC interconnect applications.
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Biosensors-Basel
·
2025
·Vol. 15
·期 12
·771
·
IF 5.6
Guo-Ying Chen,Mao-Ling Luo,Jing-Jing Dai,Feng-Qing Yang
A composite material of Mn oxide nanowires and ZIF-8 (MnxOyNWs@ZIF-8-RD) with controllable sizes and morphologies (rhombic dodecahedron-shape) was successfully synthesized under mild reaction conditions. The systematic investigation into the effects of synthesis conditions of the material on their microstructure and crystalline morphology was conducted. The material function as “tandem enzymes”, exhibiting multiple enzyme-like activities, such as peroxidase (POD)- and glutamate-oxidase (Glu OXD)-like activities. Kinetic studies reveal that the MnxOyNWs@ZIF-8-RD has excellent enzyme-like catalytic activity, with high substrate affinity and a maximum reaction rate of (H2O2: 840.52 × 10−8M·S−1). MnxOyNWs@ZIF-8-RD shows remarkable enantioselectivity for Glu enantiomers based on its POD- and Glu OXD-like activities. By integrating theoretical and experimental approaches, the recognition mechanism was preliminarily elucidated. In short, this study offered valuable insights for developing sophisticated functional materials and provided methodological references for Glu enantiomer recognition and quantitative detection.
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DOI
PubMed
高影响因子
International Journal of Applied Ceramic Technology
·
2024
·Vol. 21
·期 3
·1768-1777
·
IF 1.8
Liang Chen,Changxing Zhao,Peng Jiang,Shuhong Xie,Kai Pan
(1− x )Pb(Mg 1/3 Nb 2/3 )O 3 – x PbTiO 3 (PMN–PT) has attracted attention due to its excellent electrical properties as a typical relaxor ferroelectric material. High-quality Mn–Sm co-doped 0.68PMN–0.32PT thin films were synthesized on the Pt/Ti/SiO 2 /Si substrates by sol–gel based on spin coating method. The results show that 1 mol% Mn–2 mol% Sm co-doped PMN–PT thin films have high dielectric constant ( ε r ∼ 1895) and relatively low dielectric loss (tan δ ∼ .039) at 1 kHz. They also show superior ferroelectric polarization ( P max ∼ 53.71 μC/cm 2 , P r ∼ 30.85 μC/cm 2 ) and high dielectric breakdown strength (∼1656.6 kV/cm), which are primarily due to the low leakage current density (∼10 −7 A/cm 2 ). This work suggests a practical approach to enhance the dielectricity, piezoelectricity, and ferroelectricity of PMN–PT thin films.
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CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Yong Zhang,Yutao Zhang,Caihong Wu,Yiting Yang,Qiang Li,Yongnan Chen
To improve the high-temperature oxidation resistance and electrical conductivity of ferritic stainless steels , protective Ce-doped NiMn 2 O 4 spinel coatings were fabricated on the surface of SUS430 steel by electrophoretic deposition (EPD). The phase structure and microstructure of Ce-doped NiMn 2 O 4 in both powder and coating forms were characterized using X-ray diffraction (XRD) and scanning electron microscopy (SEM). The high-temperature oxidation of the NiMn 2 O 4 spinel coating before and after Ce doping in the air at 800 °C for 168 h was studied by weight gain experiments. The area-specific resistance (ASR) of coatings was measured by a standard four-probe method. It was found that the Ce-doped NiMn 2 O 4 spinel powder displayed a stable structure, high crystallinity, fine grain size, and decreased agglomeration when the Ce content was fixed at 0.05 mol∙L −1 . The oxidation kinetics of NiMn 2 O 4 -coated SUS430 steel before and after Ce doping obeyed a parabolic law with parabolic rate constants of 4.58 × 10 −15 g 2 cm −4 s −1 and 1.83 × 10 −15 g 2 cm −4 s −1 , respectively. When oxidized at 800 °C for 50 h, the ASR value of the coated samples before and after Ce doping stabilized at about 15.2 mΩ∙cm 2 and 14.5 mΩ∙cm 2 , respectively. This work demonstrated that the Ce-doped NiMn 2 O 4 spinel coating improved the high-temperature oxidation resistance and the electrical conductivity of metal interconnects.
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高影响因子
International Journal of Applied Ceramic Technology
·
2024
·Vol. 21
·期 5
·3645-3651
·
IF 1.8
Jinghui Peng,Hengchang Nie,Yuou Yuan,Xiao Yong,Biao He,Genshui Wang,Fanglin Du,Liang Shi,Xiaofei Qu,Shuai Zhang
Mn-doped (1- x )Bi 0.5 (Na 0.8 K 0.2 ) 0.5 TiO 3 - x BiAlO 3 (Mn:BNKT- x BA) thin films were synthesized on lanthanum nickelate-coated silicon substrates by sol-gel method. The second phase issue of the film can be effectively addressed by optimizing the substrate, and the maximum polarization and breakdown strength can be increased by introducing the proper amount of Al 3+ , which is advantageous for the film for energy storage. The results have shown that the Mn:BNKT-0.03BA film exhibits superior ferroelectric properties (with remanent polarization (P r ) of 23.72 µC/cm 2 , maximum polarization (P max ) of 75.37 µC/cm 2 ), which could be an excellent candidate for ferroelectric thin film capacitors.
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高影响因子
Journal of Energy Storage
·
2021
·
IF 6.583
Ying Wang,Cuili Xiang,Zuoan Xiao,Fen Xu,Lixian Sun,Jian Zhang,Yongjin Zou
Layered double hydroxides (LDHs) exhibit excellent electrochemical performance in alkali solutions. However, their low conductivity and poor cycle stability limit their application. In this work, Ni-Mn LDH was grown on activated carbon nanofibers (ACNFs) and then phosphidated to obtain an electrode material with a three-dimensional core–shell structure (ACNFs@Ni-Mn-P). This composite combines the electrochemical activity of the two-dimensional phosphidated nanosheets with the structural stability of the one-dimensional nanofibers. The resulting ACNFs@Ni-Mn-P electrode exhibits a high specific capacitance of 1077 F g −1 at 1 A g −1 , which is 4.9 times higher than that of a non-phosphidated ACNFs@Ni-Mn LDH electrode, and retains stability of 88.53% at a high current density of 10 A g −1 even after 5000 cycles. Moreover, an asymmetrical supercapacitor featuring an ACNFs@Ni-Mn-P positive electrode achieves comparatively prominent specific energy of 56.25 Wh kg −1 at 806.13 W kg −1 , respectively. Therefore, ACNFs@Ni-Mn-P as electrode material has great potential for application in supercapacitors.
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