Journal of Energy Storage
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2020
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IF 3.762
Meng Gao,Xia Dong,Kedian Wang,Wenqiang Duan,Xiaomao Sun,Chenguang Zhu,Wenjun Wang
Graphene/metal oxide nanocomposites are one of the most ideal electrode materials for microsupercapacitors (MSCs). However, the efficient and simple synthesis of graphene/metal oxide nanocomposites and fabrication of microelectrodes for MSCs are a challenge. In this work, using graphene oxide/Mn(CH 3 COO) 2 as the precursor, an efficient and simple approach is proposed to simultaneously synthesize graphene/MnO nanocomposites and process interdigital electrodes for MSCs by one-step picosecond laser direct-writing. Here, the MnO nanoparticles that are evenly distributed on the surface of graphene can provide pseudocapacitance to enhance the specific capacitance of graphene/MnO nanocomposites. Specifically, graphene/MnO electrode exhibits a high specific capacitance of 470 mF cm −2 . Furthermore, based on graphene/MnO interdigital electrodes, the symmetric MSCs shows excellent electrochemical performance. The maximum area specific capacitance of MSCs with PVA/H 3 PO 4 gel electrolyte is 55 mF cm −2 . After 5000 cycles, the capacitance of the MSCs with PVA/H 3 PO 4 gel electrolyte retains about 96% of its initial capacitance. The maximum energy density of MSCs with PVA/H 3 PO 4 gel electrolyte is 4.89 μWh cm −2 , and its maximum power density is 0.72 mW cm −2 . Moreover, this approach also provides a way to synthesize other graphene/metal oxide nanocomposites for MSCs by one-step laser direct-writing.
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高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2025
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IF 4.1
Yong Luo,Feng Gao,Jie Zhang,Xiaoyan Zhang
The development of efficient and durable bifunctional electrocatalysts based on earth-abundant elements for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) is critical for advancing sustainable hydrogen production. Herein, a facile one-step hydrothermal strategy was developed to synthesize Ru-doped α-MnO 2 nanoneedles grown on carbon paper (Ru 0.02 MnO 2 /CP) as a novel bifunctional electroccatalyst. Transmission electron microscopy (TEM) and X-ray diffraction (XRD) analyses revealed that Ru incorporation induces uniform lattice distortion in MnO 2 , significantly increasing the density of oxygen vacancies and catalytically active Mn 3+ sites. The structural modifications enhance the intrinsic electrochemical activity and structural stability of MnO 2 during HER/OER in alkaline media. The optimized Ru 0.02 MnO 2 /CP catalyst exhibited exceptional bifunctional performance, achieving low overpotentials of 107 mV (HER) and 261 mV (OER) at 10 mA cm −2 . Furthermore, stability testing under continuous operation reveals <6 % activity loss over 100 h at 10 mA cm −2 . Density functional theory (DFT) calculations revealed that Ru doping optimizes the adsorption/desorption energetics of reaction intermediates (*H for HER; *OH for OER), effectively lowering the kinetic barriers and overpotentials for both half-reactions. This work provides a rational strategy for designing high-performance and cost-effective bifunctional electrocatalyst, advancing their potential application in scalable water electrolysis for sustainable hydrogen production.
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高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
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2021
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IF 5.302
Feng Luo,Zhimin Li,Jiyuan Chen,Yangxi Yan,Dongyan Zhang,Maolin Zhang,Yue Hao
BiFeO 3 –BaTiO 3 –based solid solutions are promising candidates for high–temperature piezoelectric devices because of their high Curie temperature ( T C ) and considerable electrical properties. Here, we reported an optimum composition of 0.7Bi(Fe 0.999 Mn 0.001 )O 3 –0.3BaTiO 3 ceramic with a large piezoelectric constant ( d 33 ) of 230 pC/N and a high T C of 505 °C, which was attributed to the intentional introducing of the ceramic with MnO and MnO 2 mixture. Furthermore, an in situ d 33 measurement was carried out, demonstrating excellent thermal stability for the 0.7Bi(Fe 0.999 Mn 0.001 )O 3 –0.3BaTiO 3 specimen. The d 33 remained above 200 pC/N in the temperature range of 25 °C–400 °C and its fluctuation was less than ± 15 %. It was determined that the high d 33 in the 0.7BiFe 0.999 Mn 0.001 )O 3 –0.3BaTiO 3 ceramic originated from a synergistic effect of rhombohedral distortion, intrinsic response, and ferroelectric order. The findings establish a solid correlation between electrical properties and phase/domain structure, and provide a novel approach to improve the piezoelectric properties for BiFeO 3 –BaTiO 3 –based ceramics.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2026
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IF 12.5
Tiankun Hui,Yajing Yang,Fei Diao,Haihan Fan,Jie Chen,Yan Li,Yingjie Song,Chenchen Fu,Meijie Jia,Wenwei Han,Tengbo Yu,Jianye Fu
A nerve guidance conduit (NGC) based on MXene-MnO₂ hydrogel is developed for the regeneration of peripheral nerves. • The NGC possesses the dual advantages for promoting Schwann cell proliferation and alleviating chronic inflammation. • The NGC can actively regulate the neural regeneration microenvironment and promote angiogenesis. • The NGC can promote neurofilament formation, remyelination and prevent muscle atrophy. Peripheral nerve regeneration remains a major challenge in clinical due to persistent inflammatory microenvironments and oxidative stress that impede functional recovery. In this study, we designed a bio-responsive nerve guidance conduit (NGC) based on a MXene-MnO₂ nanocomposite hydrogel that actively orchestrates the regenerative microenvironment through material-mediated biological crosstalk. Unlike conventional passive conduits, our system leverages the unique properties of two-dimensional MXene to enhance Schwann cell proliferation, while MnO₂ nanoparticles act as catalytic anti-oxidative modules that continuously neutralize ROS and resolve chronic inflammation. This dynamic intervention promotes a timely immune transition to shift macrophages from M1 to M2 phenotype, which facilitates angiogenesis within the injury site. In vivo tests further revealed that the treatment group not only exhibited increased neurofilament number and reduced muscle atrophy but also showed significantly enhanced remyelination. The modular design and catalytic microenvironment-regulation strategy represent a new direction in neural interface engineering. This work provides a scalable and effective platform for advanced neural repair applications and material-guided immunomodulation in regenerative medicine. Illustration of nerve regeneration promoted by MXene-MnO₂ nanocomposite hydrogel NGCs via scavenging ROS and facilitating macrophage polarization towards the M2 phenotype. Download: Download high-res image (265KB) Download: Download full-size image
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高影响因子
Materials Advances
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2026
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IF 5.8
Muhammad Shoaib Bilal,Muhammad Arslan,Saqib Javaid,Amina Zafar,Atia Khalid,Shafqat Karim,Naeem Ahmad,Athar Javed,Abdul Ghaffar,Amjad Nisar,Mashkoor Ahmad
Materials engineering plays a pivotal role in determining the energy storage efficiency of supercapacitors. In this work, a Zn-MnO₂/MoS₂ heterostructure was synthesized via a hydrothermal route, where the synergistic coupling of Zn-doped MnO₂ with conductive MoS₂ nanosheets significantly enhanced redox activity, electronic conductivity, surface area, and structural stability. Zn doping not only expanded the MnO₂ lattice to facilitate faster ion diffusion but also induced oxygen vacancies, providing additional active sites for charge storage. Meanwhile, MoS₂ offered a conductive 2D framework that buffered volume changes and accelerated electron transport. As a result, the Zn-MnO₂/MoS₂ electrode delivered a high capacitance of 1440 F g⁻¹ at 2.85 A g⁻¹, outperforming individual Zn-MnO₂ (1250 F g⁻¹) and MoS₂ (210 F g⁻¹) as well as previously reported electrodes in 1 M KOH. Furthermore, the assembled Zn-MnO₂/MoS₂//AC device exhibited a specific capacitance of 147 F g⁻¹ at 2.85 A g⁻¹, an excellent energy density of 59 Wh kg⁻¹ at a power density of 1145 W kg⁻¹, and outstanding cycling stability with ~91% retention over 14,000 cycles. These experimental and theoretical insights highlight the strong potential of Zn-MnO₂/MoS₂ heterostructures for next-generation practical supercapacitor applications.
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高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
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2023
·Vol. 106
·期 10
·5723-5734
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IF 3.9
Yi Zhong,Yun Wang,Zhenliang Yang,Bingqing Li,Jingkun Xu,Zhiyi Wang,Liang Xie,Limei Duan,Fengyun Hu,Mingfu Chu,Rui Gao,Pengcheng Zhang,Bin Bai
In this work, the sintering kinetics of pure UO 2 and 0.5 wt.%MnO-doped UO 2 was studied by a high-temperature dilatometer heated up to 1500°C. In addition, the sintering behavior of pure UO 2 and 0.5 wt.%MnO-doped UO 2 was studied by pressureless sintering technique. The results showed that MnO doping enhanced the grain boundary diffusion of UO 2 , which can effectively decrease the densification temperature and promote grain growth. The sintering temperature of UO 2 was significantly reduced by about 200°C with the addition of 0.5 wt.%MnO. The microscopic morphology studies showed that there were still fine particles agglomerated, forming sintered spheres in the matrix even if no severe agglomeration and bimodal size distribution were observed in raw UO 2 powder. The microstructure evolution of the sintered sphere and UO 2 matrix during the densification process was studied by isothermal sintering. Finally, the present analyses indicated that the densification of UO 2 matrix can be accelerated by adding MnO or increasing the sintering temperature, thus improving the densification inhomogeneity of UO 2 matrix.
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高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2022
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IF 9.463
Sinan Zheng,Zhihui Zeng,Jing Qiao,Yue Liu,Jiurong Liu
The C/MnO/Co nanocomposite fibers were prepared via a facile electrospinning and subsequent carbonization process. Co acting as the magnetic nanoparticles and MnO nanoparticles serving as impedance modulator were introduced, effectively inhibiting the agglomeration of carbon fibers during annealing. This optimizes the microstructure and significantly improves the microwave absorption performance of the nanocomposites with diameters of 250–350 nm and rough surface morphologies . The nanocomposite fibers with equal MnO and Co molar contents exhibited the minimum reflection loss of − 71.7 dB at a frequency of 14.1 GHz and an absorber thickness of 2.3 mm, and the effective absorption bandwidth reached at 6.3 GHz at a thickness of 2.6 mm. The high microwave absorption performance can be attributed to the synergistic coactions of conduction loss, magnetic loss, interfacial polarization, and multiple scatterings derived from the rational design of the constituents and microstructure of the nanocomposites.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
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IF 8.128
Peifeng Yu,Jianxian Zhou,Mingtao Zheng,Mianrui Li,Hang Hu,Yong Xiao,Yingliang Liu,Yeru Liang
Aqueous zinc ion battery constitutes a safe, stable and promising next-generation energy storage device, but suffers the lack of suitable host compounds for zinc ion storage. Development of a facile way to emerging cathode materials is strongly requested toward superior electrochemical activities and practical applications. Herein, defect engineering, i.e. , simultaneous introduction of nitrogen dopant and oxygen vacancy into commercial and low-cost MnO, is proposed as a positive strategy to activate the originally inert phase for kinetically propelling its zinc ion storage capability. Both experimental characterization and theoretical calculations demonstrate that the nitrogen dopant significantly improves the electric conductivity of electrochemical inert MnO. Simultaneously, the oxygen vacancy creates sufficient large inserted channels and available activated adsorption sites for zinc ions storage. These synergistic structural advantages obviously ameliorate the electrochemical performance of inert MnO. Therefore, even without any conductive agent additive, the as-prepared material shows high specific capacity, superb rate capability, prolonged cycling stability and attractive energy density, which are dramatically superior to those of the pristine MnO as well as many other host cathode materials. This work presents fresh insights on the role of defect engineering in the enhancement of the intrinsic electrochemical reactivity of inert cathode, and an effective strategy for scalable fabrication of high-performance cathode for zinc ion battery.
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PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2021
·Vol. 32
·期 5
·5781-5789
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IF 2.478
Han Dandan,Shen Ye,Zhao Yuan,Pan Yifan,Wei Jinhe,Wei Yen
In this work, hierarchically porous MnO/carbon (MnO/C) microsphere materials were fabricated by a facile two-step approach. The MnO precursors and the polymerization of dopamine were synthesized simultaneously by chemical solution method at room temperature. The dopamine plays a key role in the formation of MnO/C, which guides the growth of porous spherical structures and acts as a carbon source. The enhancement of electrochemical properties and electrical conductivity strongly depend on the porous structure of the composite electrodes. Benefiting from the unique structures, the optimized MnO/C electrode delivered a high specific capacitance of 378 F·g −1 at 0.1 A·g −1 and retained over 96.66% of its initial capacitance after 1000 cycles at 1 A·g −1 , suggesting that MnO/C hybrid material has promising potential for practical supercapacitors.
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高影响因子
Catalysts
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2019
·Vol. 9
·期 11
·911
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IF 3.444
Tianming Liu,Guobao Yuan,Guocheng Lv,Yuxin Li,Libing Liao,Siyao Qiu,Chenghua Sun
Microwave-induced catalytic degradation (MICD) has been considered as one of the most prospective approaches to remove organic contaminants from water. High-performance catalysts, ideally offering efficient degradation ability, are essential to this process. This work reports the fabrication of manganese oxide on carbon nanotubes (MnO/CNTs) as an efficient catalyst under microwave irradiation (MI) to remove tetracycline (TC) from aqueous solution. The hybrid MnO/CNTs structure shows excellent performance in TC degradation. Combining experimental characterization and theoretical calculations, synergistic mechanisms are revealed: (i) Strong MnO/CNTs interaction stabilizes Mn(II) through interfacial bonding; (ii) high-spin states associated with low coordinated Mn(II) play a major role in MICD; and (iii) superoxide radicals (•O2−) and hydroxyl radicals (•OH) induced by microwave input are identified as the major active species.Keywords:microwave-induced;manganese oxide;catalysts;tetracycline;degradation
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高影响因子
JOURNAL OF MATERIALS SCIENCE
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2015
·Vol. 51
·期 7
·3536-3544
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IF 2.371
Zhang Qingtang,Wang Wenwen,Jiang Deqiang,Huang Xiaobing
Mesoporous activated carbon decorated with MnO (MnO/MAC hybrid) was prepared by pyrolysing Mn(CH 3 COO) 2 adsorbed MAC. XRD result proves that typical MnO crystals exist in the MnO/MAC hybrid. The SEM analysis indicates that a lot of pores on the surface of MAC have been filled by MnO. BET result reveals that some pores of MAC are filled by MnO and the MnO/MAC hybrid is a typical mesoporous material. This novel structure ensures the hybrid possesses excellent electrochemical performance. MnO/MAC hybrid delivers a high initial discharge capacity of 1086.1 mAh g −1 and a reversible charge capacity of 600.6 mAh g −1 . In addition, MnO/MAC hybrid also exhibits excellent rate performance and cycling performance.
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高影响因子
Organics
·
2025
·Vol. 6
·期 3
·36
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IF 1.6
Liping Wang,Mingyu Zhang
Porous carbon-loaded MnO was prepared via a combination of the sol–gel method and the chemical blow molding method using polyvinylpyrrolidone (PVP) and manganese nitrate as starting materials. SEM, EDX, TEM, FTIR, XRD, XPS, nitrogen adsorption–desorption, and elemental analysis were used to assess its physical and chemical characteristics. Furthermore, the adsorption property of porous carbon-loaded MnO for hexavalent chromium (Cr(VI)) in polluted water was investigated in detail. The results demonstrated that large numbers of MnO nanoparticles were evenly mounted on the surfaces of carbon walls, with a uniform distribution of C, N, and O elements. The BET surface area was 46.728 m2/g, and the pore sizes of porous carbon ranged from 2 nm to 10 nm. Additionally, abundant surface functional groups were found in porous carbon-loaded MnO, a result consistent with XPS data and applicable to the adsorption of heavy metals from aqueous solutions containing Cr(VI). The Freundlich model fitted the adsorption isotherm well, and the pseudo−second−order model precisely matched the adsorption kinetics. According to the study results, the adsorption was multilayer, and the adsorption process involved an endothermic reaction. These results indicate that this is a feasible way to synthesize a high−efficiency adsorbent for the removal of harmful heavy−metal ions from wastewater.
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高影响因子
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