Journal of Energy Storage
·
2024
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IF 8.9
Qian Xie,Zhengxin Cai,Zhi Zhang,Yongjun Li,Xinyu Zhang,Jianmin Wang,Jiajia Cai
Deliberate engineering of the excellent skeleton to support the MnO 2 can facilitate electron transfer and charge distribution, contributing to high-energy/power supercapacitance. Herein, an ambient and cost-effective hydrogen-doped method is innovatively employed to prepare H-TiO 2 nanotube arrays (H-TNTAs), where the MnO 2 grows further in situ. After hydrogenation, the capacitance increases by 40-fold, attributing to the improved conductivity. The H-TNTAs supported MnO 2 provides good pseudocapacitive performance, with a specific capacitance of 430.1 F/g at a discharging current of 300 μAcm −2 . The H-TNTAs@MnO 2 coupled active carbon (AC) in 0.5 M Na 2 SO 4 electrolyte is fabricated as the aqueous asymmetric supercapacitor (ASC). The ASC device displays a high energy density of 43.9 Wh kg −1 at a power density of 550 W kg −1 , with an output voltage of 2.2 V and a superior capacitance stability of 86.7 % (over 5000 cycles). The idea for designing the hydrogenated transition metal oxides can be extended to other high-performance metal oxide electrodes for energy storage devices.
研究领域:
材料科学
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能源存储
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DOI
高影响因子
TALANTA
·
2026
·
IF 6.7
Xue Yang,Yu Si,Shasha Jiang,Meng Zhuo,Tong Ren,Zijun Han,Xuetong Zhao,Xueyan Hou,Yongli Shi
In this study, an 808 nm near-infrared (NIR)-responsive hydrogel (NOR-MSN@MnO 2 -gel) was developed for the treatment of bacteria-infected wounds. The norfloxacin (NOR)-loaded manganese dioxide-modified mesoporous silica (NOR-MSN@MnO 2 ) nanoparticles were selected as a photothermal material and encapsulated in the furfuryl amine-modified hyaluronic acid hydrogel (HA-FA gel ). Studies found that MSN@MnO 2 -gel exhibited a three-dimensional porous network structure, favorable injectability, excellent water absorption & retention capacity, and desirable photothermal conversion efficiency. Benefiting from pH/NIR dual-responsive characteristics, NOR-MSN@MnO 2 -gel realized controllable NOR release and achieved efficient elimination of Staphylococcus aureus ( S. aureus ) and Escherichia coli ( E. coli ) through synergistic photothermal therapy (PTT) and chemotherapy. In vivo infected wound studies demonstrated that NOR-MSN@MnO 2 -gel combined with NIR irradiation (NOR-MSN@MnO 2 -gel + NIR) could effectively inhibit bacterial growth, alleviate inflammation, accelerate re-epithelialization, and promote collagen deposition & angiogenesis, while maintaining satisfactory biological safety. Collectively, the NOR-MSN@MnO 2 -gel + NIR regimen provides a promising strategy for clinical treatment of bacterial infected wounds.
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DOI
PubMed
高影响因子
Progress in Natural Science-Materials International
·
2026
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IF 7.4
Guixing Mo,Jingang Wu,Yun Li,Kun He
Aqueous Zn-MnO 2 batteries (AZMBs) are considered as highly promising sustainable energy-storage systems owing to their intrinsic safety, low cost, and environmental friendliness. However, manganese dioxide (MnO 2 ) cathodes suffer from slow kinetics and poor stability due to severe manganese dissolution during cycling, which severely hinders their practical application. Herein, we propose a carbon-coating strategy based on a low-cost biomass-derived carbon source (glucose), whereby a uniform and continuous carbon layer is constructed on MnO 2 nanowires via thermal carbonization to form MnO 2 @C cathodes. The carbon coating acts as a robust protective barrier, preventing Mn dissolution and buffering volume changes during cycling. Meanwhile, the carbon layer forms a highly conductive and electrochemically active interface, which markedly enhances charge transfer kinetics and ion diffusion dynamics. Owing to these synergistic effects, the MnO 2 @C cathode delivers a high reversible capacity of 239.6 mAh g −1 after 100 cycles at 0.2 A g −1 and maintains approximately 105 mAh g −1 (60% capacity retention) after 1000 cycles at 2 A g −1 , outperforming most previously reported Mn-based cathodes. This study demonstrates a scalable interfacial stabilization strategy utilizing biomass derivatives to realize durable MnO 2 cathodes in aqueous zinc batteries.
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DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2026
·
IF 8.3
Wenyue Du,Rongcai Jia,Liang Guo,Yanlu Yang
Accurate and rapid ammonia detection is critical for environmental monitoring and clinical diagnosis of chronic kidney disease. Herein, a highly sensitive room-temperature ionic liquid (RTIL) in electrochemical ammonia sensor based on a Pt-Ru electrode was developed for detecting ammonia concentrations ranging from 0 to 100 ppm. To achieve prolonged operational life and stability, 1-(2-hydroxyethyl)-3-methylimidazolium tetrafluoroborate ([HOETMIM][BF 4 ]) was utilized as the electrolyte. Nickel cobaltite (NiCo 2 O 4 ) and γ-MnO 2 were synthesized separately via hydrothermal methods. The effects of modified ionic liquids on the sensor’s performance were investigated by incorporating different mass fractions of NiCo 2 O 4 and γ-MnO 2 . Comprehensive analyses, including X-ray diffraction (XRD), scanning electron microscopy (SEM), Mapping, energy-dispersive spectroscopy (EDS), transmission electron microscopy (TEM), and X-ray photoelectron spectroscopy (XPS), confirmed the successful and rational synthesis of the samples. The ammonia sensing performance of the ILs/NiCo 2 O 4 /γ-MnO 2 sensor was studied at room temperature (25°C) using constant potential polarization (it) and electrochemical impedance spectroscopy (EIS) techniques. The testing data demonstrated that the optimized ILs/NiCo 2 O 4 /γ-MnO 2 sensor(5 wt% composite, 1:1 mass ratio) exhibited good sensitivity of 0.10 ± 0.02 μA/ppm, a limit of detection(LOD) of 1 ± 0.2 ppm, and a limit of quantification(LOQ) of 3 ± 0.5 ppm. The response and recovery times show clear difference among different sysrems: pure IL system exhibited 510 s/530 s, 5 wt% composite modified system achieved 12.22 s/3.6 s, and the fastest recorded values in batch tests were 17 s/14.5 s. Compared to traditional ionic liquid sensors, the ILs/NiCo 2 O 4 /γ-MnO 2 sensor demonstrated a significant improvement in ammonia sensing performance, with a selectivity ratio > 10 against common interfering gases.
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DOI
高影响因子
INORGANIC CHEMISTRY COMMUNICATIONS
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2025
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IF 5.4
Guolong Lu,Doudou Qin,Yanhong Feng,Caiyun Wang,Shiming Qiu,Xijun Liu
Aqueous zinc-ion batteries (ZIBs) have emerged as promising energy storage devices due to their high safety, abundant, and environmental friendliness. However, the development of high-performance cathode materials remains a significant challenge. In this work, we report an accessible manganese (II) oxide coated carbon nanotube (MnO 2 /CNT) composite prepared via a facile ball milling method, which significantly enhances the electrochemical performance of ZIBs. The optimal MnO 2 /CNT composite exhibits a high specific capacity of 388.5 mAh g −1 at 0.1 A g −1 , and long-term cycling stability with 67.51 % capacity retention at 1 A g −1 after 500 cycles. The improved performance is attributed to the enhanced electrical conductivity, optimized Zn 2+ diffusion kinetics, and stable structural integrity of the MnO 2 /CNT composite. This study provides a simple and scalable approach to designing high-performance cathode materials for next-generation ZIBs.
研究领域:
材料科学
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能源存储技术
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DOI
高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Tinglei Huang,Beier Peng,Yuandi Zeng,Zhao Lu,Yufen Hu,Min Chen
The zinc anode in alkaline Zn-MnO 2 primary batteries suffers from high reactivity causing passivation, corrosion and low active-material utilization, affecting performance and durability. Herein, we introduce mannitol, a hydroxyl-rich organic molecule, as a dual-functional electrolyte additive to simultaneously optimize the solvation structure and suppress zinc corrosion in alkaline Zn-MnO 2 batteries. Theoretical calculations and experimental analyses reveal that the hydroxyl moieties in mannitol disrupt the original hydrogen-bond network, elevate the energy barrier of the hydrogen evolution reaction (HER), and mitigate parasitic water splitting. Concurrently, mannitol enhances interfacial corrosion resistance via chemisorption on the zinc anode surface and promotes the formation of a complex and dense passivation layer. The optimized electrolyte delivers a 12.3% increase in discharge capacity at 10 mA (25°C), with a corresponding rise in Zn utilization from 55.6% to 62.5%. Furthermore, significantly greater capacity improvements are observed under extreme temperatures: 17.4% at 80°C and 44.4% at -10°C. Additionally, the corrosion efficiency is reduced by 29.6% compared to the blank sample. This study deciphers the mechanism by which polyhydroxy organic molecules optimize the performance of alkaline aqueous batteries through modulating solvation structures and the electrode/electrolyte interface, offering a scalable strategy toward high-performance alkaline Zn-MnO 2 batteries.
研究领域:
电化学
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储能
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材料科学
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电池技术
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表面化学
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产品关联
DOI
高影响因子
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
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2025
·Vol. 122
·期 33
·e2501935122
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IF 9.1
Chuan Li,Bochun Liang,Ze Chen,Rong Zhang,Huilin Cui,Yanbo Wang,Qing Li,Chao Peng,Jun Fan,Zengxia Pei,Chunyi Zhi
The practical applications of aqueous Zn||MnO2 batteries are limited by their small areal capacity, low discharging plateau, and clumsy packing device. Currently, the high potential MnO2/Mn2+ redox conversion can only be well activated in electrolytes with a very low pH value, which is not friendly to the Zn metal anode. To overcome these limitations, we have designed mild amphiphilic hydrogel electrolytes (AHEs) with a wide electrochemical stability window (ESW) and high ionic activity. The design is based on the mechanism that trace amounts of hydrophobic moieties enhance the hydrogen bonding between hydrophilic groups and water molecules in the hydrogel electrolytes. The developed AHE possesses an ESW up to ~3.0 V even at a high water content of ~76 wt%. The assembled Zn||MnO2 pouch cells using the hydrogel electrolytes demonstrated a large areal capacity of ~5 mAh cm−2 at 1 mA cm−2 and a high-voltage and flat discharging plateau of ~1.9 V. Furthermore, a pouch cell with an area of 40 cm2 was fabricated, exhibiting a capacity of ~125 mAh at 2 mA cm−2. Two pouch cells (25 cm2) in series were used to drive a 3.7 V-powerable electric fan. This work highlights the rational design of wide-ESW AHEs with high ionic activity as a promising approach to achieving portable and scalable applications of aqueous high-voltage Zn||MnO2 batteries.
研究领域:
储能
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材料科学
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电化学
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高分子科学
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DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
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2025
·Vol. 36
·期 21
·1-15
·
IF 2.8
Ni Chuyao,Xiao Jianwu,Cao Jun,Pan Jiaqi,Li Chaorong,Zheng Yingying
In order to detect glutathione (GSH), a highly fluorescent carbon dots-MnO 2 nanosheet composite sensing device was built in this work. Strongly green fluorescent carbon dots (CDs) were first created using hydrothermal technique, and the emission wavelength of CDs was 530 nm when excited by optimal excitation wave of 420 nm. CDs-MnO 2 nano fluorescent probe for GSH detection was constructed by the combination of the carbon dots and the manganese dioxide nanosheets (MnO 2 ) through electrostatic action. Fluorescence resonance energy transfer (FRET) between CDs and MnO 2 caused CDs’ fluorescence to be extinguished. With increase of the addition of MnO 2 , the system’s fluorescence intensity dropped and then stabilized. Sensing system’s fluorescence was restored by addition of GSH because GSH degraded and reduced MnO 2 into Mn 2+ ions, which caused MnO 2 nanosheets to release carbon dots subsequently. Sensing system showed strong selectivity for GSH and demonstrated a good linear relation between the fluorescence intensity and GSH concentration within 0.1 to 1 mM, and the detection limit was 1 μM. Due to the convenient preparation method of carbon dots, simple and fast detection system as well as high sensitivity, the sensing system has significant advantages and has excellent prospects in the field of fluorescence imaging and biochemical analysis.
研究领域:
分析化学
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纳米技术
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生物化学
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材料科学
·
荧光成像
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产品关联
DOI
高影响因子
Science Advances
·
2025
·Vol. 11
·期 22
·
IF 12.5
Xiaoran Ding,Xiaoteng Jia,Hongming Yuan,Daxin Pang,Hualu Zhao,Peng Sun,Fangmeng Liu,Danming Chao,Meiying Xin,Caiyun Wang,Geyu Lu,Gordon Wallace
Metal ions are widely adopted to potentiate oxidative damage-induced immunogenic cell death (ICD) and regulate immune pathways. However, current ion delivery platforms lack precise administration over distribution and retention time within the tumor microenvironment, leading to high systemic toxicity and suboptimal therapeutic efficacy. Here, local electrochemical immunotherapy is developed by implanting a tumor microenvironment–activated Zn//MnO2 battery, which uses body fluid as an electrolyte and endogenous glutathione as a redox mediator to promote sustained generation and localized retention of electrochemical products (Zn2+ and Mn2+). These elements trigger the ICD effect through reactive oxygen species accumulation and stimulate the STING pathway to activate immune cells effectively. Strategic placement of this battery around subcutaneous tumor sites results in a 99.6% growth inhibition rate after a 14-day treatment. This work demonstrates a powerful electrochemical tool for drug-free cancer immunotherapy, which may open an avenue for sustained and localized delivery of immune agonists.
研究领域:
肿瘤学
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生物医学工程
·
免疫学
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DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Gang Li,Ruiyang Tan,Bohong Gao,Yuting Zhou,Chengcheng Zhang,Ping Chen,Xinyi Wang
Electromagnetic wave absorption (EMWA) materials with qualities such as low cost, thin thickness, and high efficiency are of tremendous value in addressing the challenges posed by EMW pollution. Herein, we have successfully synthesized a nanoflower-like composite from the Prussian blue analog KCoFe(CN) 6 through a combination of hydrothermal and post-annealing methods. Subsequently, we prepared the hierarchical composite CoFe-K/GC@MnO 2 @MXene (CMM) by electrostatic self-assembly with few-layered Ti 3 C 2 T x nanosheets . Their chemical compositions, microstructures, and EMWA performances were thoroughly investigated. The CMM composite demonstrated outstanding EMWA performance with an impressive minimum reflection loss ( RL min ) value of −53.0 dB at 1.68 mm and an effective absorption bandwidth (EAB) value of 4.0 GHz with an ultrathin-matching thickness of only 1.55 mm. The exceptional EMWA performance of CMM can be attributed to the increased conductive loss, enhanced interfacial polarization, and optimized impedance matching. Simulated radar cross-section (RCS) plots confirm the outstanding RSC reduction achieved by the CMM absorber coating. Furthermore, the EAB can be extended to 12.12 GHz by designing a macro 3D quadrangular frustum pyramid structural model for the absorber. The practical application potential of CMM was also enhanced by its good heat dissipation capability, which was demonstrated in real-time using an infrared thermal imager. This work provides a novel insight into developing efficient and multifunctional EMWA materials for practical applications.
研究领域:
材料科学
·
电磁学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Zihan Bao,Yueshuai Wang,Jingcong Hu,Jiguo Geng,Sai Ma,Hehe Liang,Guoyu Huang,Bohai Tian,Jianrui Feng,Yue Lu,Manling Sui
The effective removal of the low-concentration formaldehyde (HCHO) in the indoor environment is a critical issue affecting the quality of people’s daily lives. In this study, heterojunction catalysts composed of manganese dioxide (MnO 2 ) and cesium tin iodine (CsSnI 3 ) nanocrystals were first synthesized and successfully used for photocatalytic HCHO degradation. After the full band light irradiation (150 mW/cm 2 ) for 3 h, the concentration of HCHO decreased from 7 ppm to a minimum of 0.03 ppm at room temperature (25 °C, 25 % RH, degradation efficiency reaches up to 99.6 %). Subsequent analysis using electron paramagnetic resonance (EPR) and transmission electron microscopy (TEM) revealed that the MnO 2 -CsSnI 3 heterojunction photocatalyst not only offers a Z-scheme charge-transfer pathway but also promotes the generation of a large number of •O 2 − and •OH. Compared to the single-phase material, the concentration of •O 2 − and •OH has increased by 1.5 times. This MnO 2 -based Z-scheme heterojunction photocatalyst provides a novel strategy for the degradation of low-concentration HCHO in practical indoor environments.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2022
·
IF 8.431
Yusong Yang,Ying Zhao,Yuan Zong,Ruiqi Wu,Mingyi Zhang,Jing Feng,Tong Wei,Yueming Ren,Jun Ma
Developing high-efficiency catalysts for peroxymonosulfate (PMS)-based advanced oxidation processes is important for eliminating pollutants in water. Herein, α-MnO 2 with major exposed {110} and {100} facets prepared via a hydrothermal method were used as catalysts to activate PMS for the degradation of Orange Ⅰ (OⅠ). α-MnO 2 -100, with more abundant surface hydroxyl groups and greater reductive ability, performed remarkably better than α-MnO 2 -110 for degrading OⅠ. OⅠ removal of 86.20% was obtained in the α-MnO 2 -100/PMS system. The apparent rate constant of OⅠ removal over α-MnO 2 -100 was 2.11 times higher than that of α-MnO 2 -110. The effects of PMS concentration, catalyst dosage, OⅠ concentration, initial pH, anions and humic acid (HA) on OⅠ degradation in the α-MnO 2 -100/PMS system were systematically investigated. Quenching experiments and electron paramagnetic resonance (EPR) demonstrated that SO 4 • − , •OH, O 2 • − and 1 O 2 were the reactive oxygen species (ROS) in the α-MnO 2 -100/PMS system. Moreover, the possible degradation pathway of OⅠ in the α-MnO 2 -100/PMS system was proposed. This work provides an ideal metal oxide catalyst for sewage remediation.
研究领域:
环境科学
·
化学工程
·
水处理
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DOI
PubMed
高影响因子
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