Journal of Water Process Engineering
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2025
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IF 6.7
Yongzhi Tu,Ziming Zhang,Peien Huang,Jiale Zou,Zhi Xiong,Meiting Zheng,Zhifei Ma,Jianxin Chen
Unlike conventional Fe₃O₄-MnO₂ composites, an architecture-engineered Fe₃O₄-MnO₂ (FM-21) heterostructure was constructed by anchoring Fe₃O₄ nanoparticles onto α-MnO₂ nanorods. Under visible light irradiation, the FM-21/PDS system achieves 96.5 % Orange II degradation within 60 min with a kinetic rate constant of 0.0596 min −1 , significantly outperforming its individual components and dark condition controls. Multiple characterization techniques confirm that the unique interfacial configuration establishes a direct Z-scheme charge transfer pathway, substantially enhancing charge carrier separation efficiency. XPS analysis provides direct evidence that visible light accelerates the co-cycling of Fe 3+ /Fe 2+ and Mn 4+ /Mn 3+ redox pairs, thereby maintaining highly efficient PDS activation. Quenching experiments and EPR analysis further reveal that the synergistic effect between radical and non-radical pathways, which is dominated by singlet oxygen ( 1 O₂) and holes (h + ), drives the degradation process. This mechanism enables the degradation of various pollutants with minimal dependence on their charge characteristics, demonstrating the catalyst's broad applicability. The catalyst also exhibits practical advantages including magnetic separability and stable performance over five consecutive cycles. This study demonstrates that the synthesized FM-21 exhibits significant potential for visible light-enhanced PDS activation in eliminating recalcitrant organic pollutants.
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JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2019
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IF 3.218
Peilin Zhang,Jinzhe Liu,Chencheng Zhou,Shouzhi Guo,Shuo Li,Yun Yang,Jing Wu,Di Yu,Hanfei Chen,Ming Zhao,Luyang Chen
Manganese monoxide (MnO) has emerged as a promising anode material in lithium-ion batteries (LIBs) due to its large lithiation capacity, low voltage hysteresis and environmental friendliness. In this work, we have developed the nitrogen-doped carbon coated MnO porous microspheres (MnO@NC), which consist of small nanocrystals with interparticle mesopores via a self-templated solvothermal synthesis and subsequent in-situ pyrolysis of polypyrrole precursors. By virtue of the conductive outer layer of nitrogen-doped carbon (NC) and the abundant inner mesopores, the hierarchical MnO@NC porous microspheres manifest the superior lithium storage properties as anode for LIBs. In detail, the optimized MnO@NC electrode delivers a high initial discharge capacity of 1037 mAh g − 1 at 0.2 A g − 1 , remains the discharge capacity of 890 mAh g −1 at 1A g − 1 after 500 cycles, indicates the outstanding rate capability with a specific capacity of 450 mAh g − 1 at 5A g − 1 .
研究领域:
材料科学
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储能
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纳米技术
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电化学
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高影响因子
ACS Applied Materials & Interfaces
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2020
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IF 8.758
Xiaoyan Yuan,Ruiqin Wang,Wenrui Huang,Luo Kong,Shouwu Guo,Laifei Cheng
To enhance microwave loss abilities, constructing composites with one-dimensional (1D) structure is an excellent scheme. In this work, a high-efficiency microwave absorber of MnO nanograins decorated vanadium nitride/carbon nanofibers (MnO-VN/C NFs) was successfully prepared for the first time via co-electrospinning technology and subsequent nitriding treatment. Studying in detail the specific relationship between nitriding time and the morphology of the as-prepared NFs, the precipitations of MnO nanoparticles with tailored structures were attached on the surface of VN/C NFs to optimize their electromagnetic parameters. When the nitriding time was 2.0 h at 600 °C, the MnO-VN/C NFs displayed good microwave absorption performances: the minimum reflection loss (RL) value was −63.2 dB at 8.8 GHz, and the bandwidth of RL < −10 dB was up to 6.4 GHz from 11.6 to 18 GHz at the thickness of 2.8 mm. Meanwhile, the absorption bandwidth (RL< −10 dB) could cover the whole X and Ku band by adjusting the thickness, respectively. The outstanding performances could be attributed to the good impedance matching and various loss pathways including conductive loss and interfacial and dipole polarizations. In these regards, MnO-VN/C NFs are likely to be utilized as a high-efficiency microwave absorber. And the strategy in this work can provide great help to design other 1D structural microwave absorbers with a broader absorbing band.
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CHEMICAL ENGINEERING JOURNAL
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2017
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IF 6.216
Qianxu Ye,Juanjian Ru,Jinhui Peng,Guo Chen,Ding Wang
Herein, the multiporous MnO/N-doped carbon (MnO/NC) composite based on the abundant and inexpensive electrolytic manganese dioxide were fabricated through a facile microwave-assisted carbonthermal reduction, combined with a subsequent in-situ polymerization of polydopamine onto MnO along with thermal treatment. As an anode material, it retains a reversible capacity of 770.5 mAh g −1 at 300 mA g −1 and high Coulombic efficiency of 99% over 500 cycles, superior than those values of the pure multiporous MnO alone. The impressive performance is attributed to the splendid structure stability contributed by well-connected three-dimensional porous configuration and the enhanced reaction kinetics as well as electrical conductivity incurred by N-doped carbon layer with multiple type nitrogen.
研究领域:
材料科学
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电化学
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纳米材料
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能源存储
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功能材料
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高影响因子
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
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2020
·Vol. 52
·期 1
·314-321
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IF 2.035
Ren Guoxing,Xiao Songwen,Xia Longgong,Liao Caibin,Liu Zhihong
To obtain fundamental information on the dissolution of cobalt into alumina-saturated MnO-SiO 2 -Al 2 O 3 slags in the smelting reduction of spent lithium-ion batteries, the equilibrium distribution of cobalt between Co-Cu alloys and alumina-saturated MnO-SiO 2 -Al 2 O 3 slags was measured at 1573 K and 1623 K under a controlled CO-CO 2 atmosphere. The results show that (i) the solubility of cobalt in the slag increased with increasing concentration of cobalt in the alloy and increasing oxygen partial pressure in the atmosphere at a fixed concentration of cobalt in the alloy, and (ii) the activity coefficient of CoO in the slag increased with increasing cobalt oxide in the slag. The activity coefficient of CoO in the slag, γ CoO, referred to as solid CoO, can be described as a function of the concentration of CoO in slag as follows: γ CoO = 11.2957(wt pct CoO in slag) + 12.0944 (1573 K, (wt pct MnO)/(wt pct SiO 2 )= 0.76–0.83); γ CoO = 2.2286(wt pct CoO in slag) + 4.5232 (1623 K, (wt pct MnO)/(wt pct SiO 2 )= 0.78–0.85).
研究领域:
冶金学
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材料科学
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CERAMICS INTERNATIONAL
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2016
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IF 2.758
Chunlong Dai,Minqiang Wang,Jingang Yang,Linyu Hu,Maowen Xu
A novel MnO@Amorphous C-Carbon nanotubes (MnO@C-CNTs) composite is prepared by chemical vapor deposition (CVD). When used as an anode material for Li-ion batteries, the MnO@C-CNTs composite exhibits an initial discharge capacity of 1164 mA h g −1 at 100 mA g −1 and the discharge capacity gradually increased from 571.7 mA h g −1 to 654 mA h g −1 after 100 cycles at 1 A g −1 , which shows an increase of the capacity rather than attenuation. Furthermore, the MnO@C-CNTs electrode can deliver a capacity of up to 228 mA h g −1 at 5 A g −1 . These results indicate that the three-dimensional conductive network of the MnO@C-CNTs composite could prevent the aggregation of MnO particles, and its open structure allows electrolyte penetration, and reduces the diffusion path of the lithium ions , hence maximizes utilization of the electrochemically active MnO particles, while enhances the conductivity of electrode material and Li + transport. This work offers a universal approach to design various metal oxides@C-CNTs composite.
研究领域:
材料科学
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能源技术
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CERAMICS INTERNATIONAL
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2022
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IF 5.532
Jiawei Wei,Bingqiang Han,Yaowu Wei,Nan Li,Yilong Wang,Junlong Duan,Jiali Fu
In this paper, the influence of the CaO, MnO and Cr 2 O 3 on the decomposition mechanism, sintering process and properties of zircon ceramics were studied. The X-ray diffraction (XRD), microstructure, pore characteristics and densification behaviour were used to evaluate the decomposition mechanism and the properties of the zircon ceramics. The results indicated that the addition of CaO could accelerate the decomposition rate of zircon by the formation of the solid solution, which caused the appearance of the large pores to weaken the properties. Cr 2 O 3 could limit the sintering process, decomposition reaction and grain growth of zircon to degrade the performance of the zircon ceramics. The addition of MnO promoted the grains growth and had no effect on the decomposition of zircon by the formation of solid solution. Thus, the zircon ceramics with MnO rendered an optimal bulk density and an apparent porosity of 3.53 g/cm 3 and 22.5%, a high compressive strength of 212.6 MPa sintered at 1550 °C.
研究领域:
材料科学
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陶瓷工程
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高影响因子
DENTAL MATERIALS
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2026
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IF 6.3
Meng Bo,Jiao Fang,Yuning Wu,Zixuan Chen,Yingchi Liu,Shuang Liu,Chunyan Li,Lin Wang,Xiaolin Sun
A metabolically reprogrammed MnO₂-Mg/Pt@BBF nanozyme is developed for periodontitis treatment. • Mg²⁺ amplifies endogenous H₂O₂ production via SpxB in Streptococcus gordonii. • Pt decoration enriches catalytically active Mn²⁺ to enhance chemodynamic therapy. • Covalently immobilized BBF inhibits LuxS/AI-2 quorum sensing and disrupts biofilm cohesion. • The nanozyme reduces bacterial burden, alveolar bone loss, and inflammation in vivo . Objectives To overcome the intrinsic incompatibility between dense periodontal biofilms and chemodynamic therapy (CDT), we developed a vacancy–engineered MnO₂ nanozyme that integrates redox–state programming, Mg²⁺–enabled endogenous H₂O₂ amplification, and covalently immobilized quorum–sensing inhibition for the local treatment of periodontitis. Methods Mg²⁺–coordinated MnO₂ nanoflowers were decorated with Pt nanoparticles and covalently functionalized with BBF. Physicochemical properties, Mn valence states, H₂O₂ and ·OH generation, LuxS/AI–2 signaling, Porphyromonas gingivalis metabolomic changes, antibiofilm activity, and therapeutic efficacy in rat periodontitis were evaluated. Results Pt decoration increased the Mn²⁺ fraction from 33% to 51%, while Mg²⁺ enhanced SpxB–mediated H₂O₂ production by Streptococcus gordonii . Immobilized BBF reduced AI–2 activity from 67.8% to 22.8% and downregulated luxS, fimA, mfa1, kgp, and rgpA . In dual–species biofilms, MnO₂–Mg/Pt@BBF yielded 68.7% dead cells, an approximately 4–log₁₀ reduction in viable bacteria, and the lowest residual thickness. Metabolomics revealed depletion of G6P, R5P, NADPH, ATP, and α–ketoglutarate in P. gingivalis. In vivo , treatment reduced periodontal bacterial burden by approximately 3 orders of magnitude and decreased the CEJ–ABC distance from 1.44 ± 0.28 mm to 0.56 ± 0.15 mm, accompanied by reduced inflammation and IL-6 expression, improved collagen organization, and elevated Arg-1 levels. Significance This locally deliverable platform couples vacancy/valence–tuned catalysis, Mg²⁺–primed endogenous oxidant supply, and surface–immobilized quorum–sensing blockade, offering a composition–guided strategy for controlling polymicrobial periodontal biofilms and limiting infection–associated tissue destruction.
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Journal of Energy Storage
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2026
·
IF 9.8
Yuan Qin,Lu Huang,Xufeng Wang,Liang Luo,Zihao Ou,Youcun Bai,Bin Xiang,Yang Zhou,Xuefeng Zou,Hujun Shen
MnO anodes face serious limitations in high performance lithium–ion batteries due to their intrinsically low electronic conductivity and significant volume expansion during cycling. Here, we propose a simple lattice–engineering strategy to precisely control the degree of lattice contraction and induce an in situ electrochemical amorphization process. Existing strategies can partially buffer mechanical stress and enhance charge transfer but still fail to overcome the intrinsically poor conductivity of MnO and the limited ability of conventional carbon matrices to accommodate electrochemical amorphization. In our design, we establish a hierarchical stabilization system governed by lattice engineering. Specifically, the lattice contraction introduces controllable oxygen vacancies, which serve as the trigger for a cycle-driven in-situ amorphization mechanism. This intrinsic structural reconstruction, synergized with the extrinsic protection of an N-doped adaptive carbon interface, enables the superior long-term cycling stability and enhanced capacity of MET(5Mn)-700. The MET(5Mn)-700 half–cell retains over 90% of its initial capacity after 500 cycles at 1.0 A g −1 , while an NCM811‖MET(5Mn)-700 full cell maintains 93% capacity retention after 200 cycles at 1C. This multilevel structure–interface–dynamics design overcomes the performance degradation bottleneck of traditional Mn–based anodes, providing a new paradigm for developing high–stability lithium–ion battery anodes.
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CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Shuangze Yang,Zhimin Zou,Chunhai Jiang
Manganese monoxide (MnO) has been widely studied as a potential anode material of Li-ion batteries because of its high specific capacity and abundant raw materials. However, the poor cycling stability of MnO associating to its large volume change during the repeated conversion reaction with Li + has restricted its practical applications. Herein, ternary MnO/MnTiO 3 @C composite anode materials are prepared by in situ capturing TiO 2 nanoparticles into sea urchin-like MnO 2 in a mild hydrothermal reaction , followed by resorcinol-formaldehyde (RF) resin coating and thermal treatment. With the strong stabilization effect of the MnTiO 3 component, the optimized ternary MnO/MnTiO 3 @C composite anode exhibits greatly enhanced cycling performance as compared to MnO@C. A reversible capacity of 383 mAh g −1 is preserved after 500 cycles at 1000 mA g −1 . This improved cycle performance can be originated from the stable TiO crystals and the highly reversible amorphous Li x MnTiO 3 phase generated in the first lithiation process. The reasonably high specific capacity and robust cycle stability enable the ternary MnO/MnTiO 3 @C composites to be promising alternative anode materials to graphite for Li-ion batteries.
研究领域:
材料科学
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能源存储
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高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Fang Tang,Jinyu Gao,Qiaoyun Ruan,Xianwen Wu,Xiangsi Wu,Tao Zhang,Zhixiong Liu,Yanhong Xiang,Zeqiang He,Xianming Wu
ABSTRACT Aqueous zinc ion batteries (AZIBs) show tremendous application prospect in the fields of energy storage for smart grid and electric tools because of their high safety, environmental benignity and low cost. However, the sluggish zinc ion diffusion kinetics and the serious manganese dissolution issue seem to impede its practical application. Herein, the MnO/C@rGO composites are fabricated via an in situ strategy of one-step MOFs-derived solvothermal method , combined with a calcination step at 570 °C under Ar for 2 h. As further evaluated as a cathode for AZIBs, it can maintain a discharge capacity of 170.6 mAh g -1 after 300 cycles at 500 mA g -1 . Importantly, even as the current density reaches up to 2.0 A g -1 , it still delivers a reversible capacity as high as 110.1 mAh g -1 . The excellent cycleability, superior rate capability and smaller self-discharge phenomenon are ascribed to the inhibition of manganese dissolution and the conductivity improvement. Therefore, this work may give a new insight into improving the comprehensive electrochemcial performances of manganese-based cathode materials for AZIBs with large power densities and long cycle life.
研究领域:
材料科学
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电化学
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高影响因子
JOURNAL OF RARE EARTHS
·
2014
·
IF 1.342
Xiaodong WU,Haining YU,Duan WENG,Shuang LIU,Jun FAN
MnO and CeO 2 powders were mechanically mixed by a spatula and by milling to obtain loose-contact and tight-contact mixed oxides, respectively. The monoxides and their physical mixtures were characterized by X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), X-ray photoelectron spectroscopy (XPS), Raman, O 2 temperature-programmed desorption (O 2 -TPD), H 2 temperature-programmed reduction (H 2 -TPR) and NO temperature-programmed oxidation (NO-TPO). The MnO x -CeO 2 solid solutions did not form without any calcination process. The oxidation state of manganese tended to increase while the ionic valence of cerium decreased in the mixed oxides, accompanied with the formation of oxygen vacancies. This long-ranged electronic interaction occured more significantly in the tight-contact mixture of MnO and CeO 2 . The formation of more Mn 4+ and oxygen vacancies promoted the catalytic oxidation of NO in an oxygen-rich atmosphere.
研究领域:
材料科学
·
催化化学
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高影响因子
危险品化学品经营许可证（带存储）