Nature Communications
·
2025
·Vol. 16
·期 1
·1-11
·
IF 15.7
Lai Guojun,Zhao Zequan,Zhang Hao,Hu Xueting,Lu Bingan,Liang Shuquan,Zhou Jiang
Engineering the formulation of an Mn-based positive electrode is a viable strategy for producing an efficient aqueous zinc-ion battery. However, Mn dissolution and the byproducts result in capacity fading, thus limiting its electrochemical performances. To solve the undesirable issues, the concept of in-situ forming the positive electrode/electrolyte interface on the commercial MnO 2 is designed, with the help of introducing the Dioctyl Phthalate into the ZS-based electrolyte (2 M ZnSO 4 + 0.2 M MnSO 4 ), designated as ZS-DOP electrolyte. An advanced three-dimensional chemical and imaging analysis on a model material reveals the dynamic formation of positive electrode/electrolyte interface. The formed organic interface effectively suppresses the corrosion of the electrolytes with its hydrophobicity, and adjusts the pH value according to Le Chatelier’s Principle to inhibit the production of by-products. Specifically, the pouch cell assembled with the ZS-DOP electrolyte attains a reversible capacity of ~2.5 Ah and powers the unmanned aerial vehicle. Furthermore, photovoltaic energy storage applications deliver a stable capacity of 0.5 Ah and realize the power supply for mobile phones and other electronic devices. Our results facilitate the development of in-situ surface protection on the positive electrode in aqueous zinc-ion battery, providing insights into its practical application.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Wei Li,Chunjie Wang,Yujie Zhu,Yangguang Zhang,Hengze Ding,Linqi Zhu,Wei Zhou,Yongyou Wu,Liangzhu Feng
Radioimmunotherapy represents a clinically available combination strategy for treating a broad range of solid tumors, however, its therapeutic efficacy remains significantly compromised by tumor hypoxia due to the inhibition of cytotoxicity and the suppression of antitumor immunity activation. Herein, we synthesized a pH-responsive oxygen-releasing nanomedicine (denoted as an oxygen nanotank) by growing a thin manganese dioxide (MnO 2 ) layer onto calcium hyperoxide (CaO 2 ) nanoparticles through an in-situ oxidation process to enhance radioimmunotherapy. Using a two-step liposomal coating strategy, we obtained CaO 2 @MnO 2 -PEG, which exhibited excellent physiological stability, with MnO 2 functioned as a catalase-like nanozyme to enable pH-dependent oxygen generation. This nanomedicine significantly enhanced the X-ray irradiation induced cytotoxicity against hypoxic tumor cells by amplifying intracellular reactive oxygen species. After intravenous injection, CaO 2 @MnO 2 -PEG specifically accumulated in tumor tissues and substantially alleviated hypoxia, resulting in enhanced therapeutic outcomes of X-ray-mediated external radiotherapy in a subcutaneous CT26 tumor model. Furthermore, combining CaO 2 @MnO 2 -PEG with immune checkpoint blockade therapy achieved synergistic tumor suppression by concurrently activating innate and adaptive immune responses. This study establishes a controllable synthesis method for pH-responsive oxygen nanotanks, effectively addressing hypoxia-induced therapeutic resistance in radioimmunotherapy.
研究领域:
纳米医学
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癌症治疗
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放射肿瘤学
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免疫治疗
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生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2025
·
IF 6.1
Hongjie Wu,Dirong Gong,Xiaoyu Jia
The uncontrolled disposal of Tl(I) waste comes at a significant economic and environmental cost because of the acute toxicity and high mobility. To resolve the aggregation problem for most reported MnO 2 based adsorbent materials which significantly affected the adsorption efficiency, porous zwitterionic ammonium propyl sulfonate (zw) polyacrylamide hydrogel (PAAm) has been fabricated to disperse nano-MnO 2 as a support. The developed nano-MnO 2 @PAAm-zw exhibited a specific surface area of 5.06 m 2 /g and a pore diameter of 23.8 nm. particularly amenable to removal of Tl(I) for environmental remediation. The factors, including adsorbent MnO 2 incorporation, feeding amount, adsorption time, pH of the solution, Tl(I) initial concentration and existence of competing cations that governing the adsorption performances were fully elucidated. The maximal removal capacity Q e reaches up to 336.5 mg (Tl) g −1 (MnO 2 ) with 99.92 % elimination efficiency and a low residue of 4.5 μg L −1 . The materials exhibit an astonishing robustness against nature matrix and high concentration of cations with adsorption capacity being 928.6–41.43 times larger than various competing counterparts for lab-made and mineral samples, representing the state-of-the-art level of adsorbents. The adsorbent can be regenerated at least five times retaining 86.0 % of original efficiency. A novel concerted mechanistic pathway of retention mainly associated with re-dox reaction is possible. These features offer great potentials for selective and deep elimination of total thallium in water samples.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Jian-Wu Xiao,Li-Wang Jiang,Yu-Ma Yang,Zi-Kun Lin,Ze-Wu Xie,Shao-Xin Bei,Fu-An He
In this work, novel MnO2–Fe3O4/melamine (MA) sponges have been prepared for oil–water separation. First, MnO2 nanorods were synthesized by a hydrothermal method and their morphology could be controlled by different reaction conditions. Next, the as-prepared MnO2 nanorods were used alone or in combination with Fe3O4 nanoparticles to obtain hydrophobic MA sponges by surface modification with the assistance of silane coupling agents and/or Sylgard 184 adhesive. The realization of the high roughness and the coating with a low surface energy material for surface-modified MA sponges were mainly confirmed by SEM and FTIR, respectively, which were two key factors for the enhancement of hydrophobicity. All investigated MnO2/MA and Fe3O4/MA sponges were hydrophobic but with the water contact angles (WCAs) lower than 150°, while the WCAs of MnO2–Fe3O4/MA sponges could reach or exceed 150° under suitable preparation conditions achieving superhydrophobicity, which was attributed to the improved roughness. Both MnO2/MA and MnO2–Fe3O4/MA sponges had good oil–water separation ability by direct adsorption and gravity filtration, and their adsorption capacities for different oils were measured to be 37–50 g g−1 and 35–67 g g−1, respectively. Additionally, the saturation magnetization of the MnO2–Fe3O4/MA sponge could reach as high as 17.3 emu g−1, which is beneficial for the magnetic control operation during oil–water separation application.
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Peipei Zhang,Hanlei Sun,Xiuyuan Lu,Rena Oh,Nuowei Zhang,Ouardia Akdim,Alberto Roldan,Xiaoyang Huang,Binghui Chen
Hydrogen production from formaldehyde aqueous solution at room temperature shows a unique advantage regarding the bi-functional reaction route. MnO 2 was reported to be an active catalytic material for this process, especially after coating with carbon composite for improved active site distribution. Here, we unravel that the conversion of formaldehyde can be treated as two tandem half-reactions: the oxidative dehydrogenation (ODH) of formaldehyde and the hydrogen evolution reaction (HER). β-MnO 2 in a physical mixture with carbon ( i.e ., XC-72R, graphene) enhances both formaldehyde conversion (from 13% to 19.5%) and hydrogen productivity (from 22.35 μmol mg −1 h −1 to 33.86 μmol mg −1 h −1 ) by a synergistic effect of the phase separation catalyst in terms of electron redistribution and transport over the active sites. The catalyst examination supported by DFT calculation shows relatively low activation energy and band gap of β-MnO 2 + C with a density of states spanning the Fermi level . The discovery of this novel synergistic catalytic effect: a phase separation catalyst with cooperative enhancement, provides new insight into the area of tandem catalysis.
研究领域:
催化化学
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能源科学
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材料科学
✓ 已验证
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
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2014
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IF 3.633
Le-Qing Fan,Gui-Jing Liu,Jun-Chang Zhao,Ji-Huai Wu,Ji Zhong,Jian-Ming Lin,Jing-Hao Huo,Lu Liu
Reduced graphene oxide (rGO)/MnO 2 composites were synthesized by a facile one-step hydrothermal reaction of GO and KMnO 4 in ammonia solution, and then used as electrode materials for supercapacitors containing electrolytes of 1 M Na 2 SO 4 aqueous solution. The structures and morphologies of composites were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy , Raman spectra and N 2 adsorption–desorption isotherms. To assess the supercapacitive performances of these materials, cyclic voltammetry , galvanostatic charge–discharge and electrochemical impedance spectroscopy tests of two-electrode supercapacitors were performed. GO was reduced to form rGO and 30–50 nm sized MnO 2 nanoparticles were in-situ grown on the rGO sheets to obtain rGO/MnO 2 composites simultaneously during the hydrothermal reaction . The influences of mass ratios of GO and KMnO 4 on the electrochemical performances of supercapacitors were investigated. In comparison with pure MnO 2 -based supercapacitor , supercapacitors based on rGO/MnO 2 composites show better performances because both the specific surface areas and the electrical conductivities of electrode materials were increased by the introduction of rGO. When the mass ratio of GO and KMnO 4 is 2:1, rGO/MnO 2 composite electrode shows the highest capacitance of 205.7 F/g at a constant current density of 0.15 A/g in a two-electrode supercapacitor. Additionally, the supercapacitor exhibits high rate capability and long cyclic durability.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Situo Cheng,Zhihui Zhang,Jianfeng Yan,Tianyu Yang,Junli Zhang,Jiecai Fu
Micro-supercapacitors (MSCs) have emerged as indispensable power solutions for modern microelectronics, offering rapid charge/discharge capabilities, high power delivery, and exceptional cycling stability. However, their energy density remains limited due to the lower electrode capacitance and narrower voltage window of conventional symmetrical micro-supercapacitors (SMSCs). In this study, a novel strategy is presented to maximize the energy density of MnO 2 -based SMSCs by modulating their electrode polarity and redox activity. Specifically, the non-lattice oxygen concentration in MnO 2 is focused on tuning to introduce additional redox-active sites, thus improving charge storage capacity and energy density. Using operando electrochemical quartz crystal microbalance (EQCM) analysis reveals a multi-step redox mechanism involving lattice water-assisted transformations and non-lattice oxygen pathways, providing unprecedented insights into MnO 2 ’s electrochemical behavior in alkaline electrolytes. The engineered symmetric MnO 2 MSCs achieve an outstanding energy density of 33.63 µW h cm −2 at a power density of 1.12 mW cm −2 , retaining full performance under mechanical deformation. The alkaline electrolyte further inhibits disproportionation reaction, preserving active material integrity and cycling durability. This work not only unveils the pivotal role of non-lattice oxygen in MnO 2 electrochemical polarity but also provides a promising pathway for designing high-energy-density, flexible MSCs to power next-generation microdevices.
研究领域:
材料科学
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电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2025
·
IF 3.9
Liang Yuan,Wang Kai,Liu Simeng,Shi Jian,Liu Fan,Morikawa Hideaki,Zhu Chunhong
Toluene (C 7 H 8 ) is a representative volatile organic compound (VOC) that poses a significant threat to the atmospheric environment and human health. Catalytic oxidation has shown demonstrated advantages in the field of air purification, but precious metal catalysts have significant limitations by their high cost and scarcity. This study used hydrothermal synthesis to prepare manganese dioxide nanowires with a diameter of approximately 100 nm. A multi-scale fiber membrane was constructed with mullite nanofibers, which can effectively remove PM 2.5 and toluene from the air. The filtration efficiency of the composite fiber membrane remaind above 99% at different air flow rates. It can achieve complete oxidation of toluene, and after five cycles of testing, the removal rate of toluene remains at 99.2%, demonstrating good catalytic performance. MnO 2 nanowire/mullite multi-scale fiber membrane has shown great potential for indoor air purifier filters.
研究领域:
环境科学
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材料工程
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空气污染控制
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOM
·
2025
·
IF 2.3
Chen Jialin,An Ming,Dai Mengnan,Li Shutao,Chen Yeqing,Song Rui,Song Jiaxing,Chen Longming,Zhong Xiting,Tian Quanwei
The properties of oxidants significantly affect the thermal and combustion properties of nanothermites, and alpha and beta-MnO 2 nanorods with similar morphological appearances were prepared using the hydrothermal method. Corresponding nanothermites were prepared employing the electrostatic spraying method and their thermal and combustion properties have been compared through TG-DSC and combustion tests. The aluminothermic reaction process was simulated by molecular dynamics, and the results showed that the β-MnO 2 /Al nanothermite first underwent β-MnO 2 thermal decomposition followed immediately by an aluminothermic reaction, whereas the α-MnO 2 /Al nanothermite underwent a direct aluminothermic reaction. In contrast, the α-MnO 2 /Al nanothermite could release more heat. According to thermal analysis, the activation energy of α-MnO 2 /Al nanothermite was 100.15 kJ mol − 1 higher than β-MnO 2 /Al nanothermite, indicating better stability. Combustion experiments showed that the combustion propagation rate of the α-MnO 2 /Al nanothermite was faster than the β-MnO 2 /Al nanothermite. The results have been verified and the reaction process has been exhibited using molecular dynamics to simulate the aluminothermic reaction process. The notable differences in the thermal and combustion properties of nanothermites containing MnO 2 with varying phases can be attributed to the distinct crystal structures of α-MnO 2 and β-MnO 2 . The alternating 1 × 1 and 2 × 2 tunnel structure of α-MnO 2 is more stable, whereas β-MnO 2 undergoes thermal decomposition before the aluminothermic reaction.
研究领域:
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2026
·
IF 13.2
Keer Chen,Ruyi Li,Shaowen Zhang,Yan Li,Bingkun Guo,Xiaolei Wang,Yang Liu
Despite their attractive cost and safety, achieving long-cycle-life aqueous Zn-MnO 2 batteries is still hindered by complex interfacial Mn chemistry, particularly Mn 2+ dissolution/redistribution that accelerates performance decay. The capacity of MnO 2 originates from the insertion and conversion of Zn 2+ , yet Mn 2+ dissolution has consistently been a critical factor undermining the performance of MnO 2 cathodes. Therefore, achieving simultaneous enrichment of Zn 2+ and Mn 2+ on the cathode surface remains a pressing need in aqueous Zn-MnO 2 batteries. In this work, an amide-based compound, N, N′-1,2-Ethanediylbis(benzamide) (EDB) is proposed as the cathode additive to exhibit limited selectivity in chelating both Zn 2+ and Mn 2+ ions on the surface of MnO 2 cathode, thereby synergistically enriching interfacial ions to boost capacity utilization and suppress Mn dissolution, leading to enhanced cycling stability. The Zn||EDB@MnO 2 cell exhibits a high specific discharge capacity of 465 mA h g −1 after 200 cycles at 308 mA g −1 , and excellent long-term cycling stability with retaining 83% of its initial capacity after 1000 cycles at 5 A g −1 . This study on cathode additives presents a novel and effective strategy for achieving high-capacity and long-cycle-life aqueous Zn-MnO 2 batteries, while also offering valuable insights into the design of functional additives for advanced energy storage systems facing challenges related to interfacial adsorption and surface-mediated reactions on electrodes.
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产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2022
·
IF 9.794
Peijie Xu,Chunyuan Wang,Changxin Wei,Yigao Sun,Yi Zhou,Hongfei Cheng
Rechargeable aqueous Zn/MnO 2 batteries are promising to be one of the best next-generation energy storage devices owing to the abundant reserves, mild chemical properties, and high energy density . Nevertheless, the dendrite, corrosion, and by-products issues are inherent on Zn metal anode and severely affect the applications of Zn/MnO 2 batteries. Herein, we propose a lamellated reconstructed montmorillonite-based membranes (RMM) with nanofluidic channels for uniforming the distribution of Zn 2+ , restraining the growth of Zn dendrite, and suppressing the generation of irreversible products. The RMM with excellent stability in electrolyte is sandwiched between the separator and Zn metal anode to assemble cells. The Zn/MnO 2 cells with RMM-Zn anode can achieve stable Zn electroplating/electrostripping over 1000 h at a current density of 4.4 mA cm −2 with almost no Zn dendrite. Meanwhile, the Zn/MnO 2 cells based on RMM-Zn anode exhibit high durability and capacity retention of 92.6% after 900 cycles at 5 C. The novel design of reconstructed nanoclay-based membranes with nanofluidic channels opens a new opportunity for practical applications of high-performance rechargeable aqueous batteries .
研究领域:
储能与转换
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材料科学
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电化学
·
纳米技术
✓ 已验证
DOI
高影响因子
Scientific Reports
·
2017
·Vol. 7
·期 1
·1-10
·
IF 4.259
Iqbal Nousheen,Wang Xianfeng,Babar Aijaz Ahmed,Zainab Ghazala,Yu Jianyong,Ding Bin
Increasing use of wearable electronic devices have resulted in enhanced demand for highly flexible supercapacitor electrodes with superior electrochemical performance. In this study, flexible composite membranes with electrosprayed MnO 2 particles uniformly anchored on Fe 3 O 4 doped electrospun carbon nanofibers (Fe 3 O 4 @CNF Mn ) have been prepared as flexible electrodes for high-performance supercapacitors. The interconnected porous beaded structure ensures free movement of electrolyte within the composite membranes, therefore, the developed supercapacitor electrodes not only offer high specific capacitance of ~306 F/g, but also exhibit good capacitance retention of ~85% after 2000 cycles, which certify that the synthesized electrodes offer high and stable electrochemical performance. Additionally, the supercapacitors fabricated from our developed electrodes well maintain their performance under flexural stress and exhibit a very minute change in specific capacitance even up to 180° bending angle. The developed electrode fabrication strategy integrating electrospinning and electrospray techniques paves new insights into the development of potential functional nanofibrous materials for light weight and flexible wearable supercapacitors.
研究领域:
材料科学
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纳米技术
·
电化学
·
能源存储
·
功能材料
·
柔性电子学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）