ACS Applied Energy Materials
·
2025
·
IF 5.5
Fuyu Chen,Changqing Xiong,Xiangdong Cheng,Ying Shi,Hui Chen,Qinfang Zhang
The electrode is crucial for electrochemical reactions, significantly impacting the vanadium flow battery (VFB) performance. However, their relatively low electrochemical activity remains a major obstacle to developing high-performance VFBs. To overcome this limitation, we introduce a catalyst synthesized by integrating pore-forming agents─specifically, poly(ethylene oxide)–poly(propylene oxide)–poly(ethylene oxide) triblock copolymer (P123) and polyoxyethylene–polyoxyethylene–polyoxyethylene triblock copolymer (F127)─into MnO@C derived from a metal–organic framework. This study marks the first application of such an approach to VFB enhancement. A comprehensive analysis is conducted to examine the catalyst’s morphology, composition, electrocatalytic activity, and charge–discharge behavior. The results reveal that (i) the prepared catalysts possess a nanoporous structure with MnO nanoparticles uniformly dispersed in amorphous carbon; (ii) pore-forming agent-modified MnO@C, especially P123–MnO@C, exhibits a large specific surface area, an abundance of oxygen-containing functional groups, and exceptional electrochemical activities; (iii) it enhances the energy efficiency of VFBs by 5.7% compared to those utilizing raw carbon felts and by 5.1% over those with MnO@C electrodes at 100 mA cm–2; and (iv) it significantly improves operating voltages, cell capacities, high current density properties, and cycling performance. Thus, this study proposes an innovative electrochemical catalyst for VFBs, enhancing performance and advancing renewable energy storage solutions.
研究领域:
电化学
·
储能
·
纳米材料
·
催化
·
电池技术
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2019
·Vol. 9
·期 12
·1676
·
IF 4.034
Pianpian Ma,Na Lei,Bo Yu,Yongkun Liu,Guohua Jiang,Jianming Dai,Shuhong Li,Qiuling Lu
La-based perovskite-type oxide is a new type of supercapacitor electrode material with great potential. In the present study, LaMnO3/MnO (LMO/MnO) nano-arrays supported by carbon cloth are prepared via a simple one-step electrodeposition as flexible supercapacitor electrodes. The structure, deposit morphology of LMO/MnO, and the corresponding electrochemical properties have been investigated in detail. Carbon cloth-supported LMO/MnO electrode exhibits a specific capacitance of 260 F·g−1at a current density of 0.5 A·g−1in 0.5 M Na2SO4aqueous electrolyte solution. The cooperative effects of LMO and MnO, as well as the uniform nano-array morphology contribute to the good electrochemical performance. In addition, a symmetric supercapacitor with a wide voltage window of 2 V is fabricated, showing a high energy density of 28.15 Wh·kg−1at a power density of 745 W·kg−1. The specific capacitance drops to 65% retention after the first 500 cycles due to the element leaching effect and partial flaking of LMO/MnO, yet remains stable until 5000 cycles. It is the first time that La-based perovskite has been exploited for flexible supercapacitor applications, and further optimization is expected.Keywords:perovskite-type LaMnO3/MnO;supercapacitor flexible electrode;electrochemical properties;carbon cloth;electrodeposition
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
Advanced Healthcare Materials
·
2025
·
IF 9.6
Hua Chai,Renpeng Xia,Nan Ouyang,Jingyu Yao,Jiukun Hu,Minxuan Sun,Peng Miao
Reactive oxygen species (ROS) mediated cell damage is one of the most popular and effective ways for cancer therapy. However, overexpressed antioxidant of reduced glutathione (GSH) is always activated in tumor cells, which maintains redox equilibrium. Attempts to deplete GSH and elevate ROS levels can be potent therapeutic strategies. Herein, tumor cell membrane-encapsulated Fe 3 O 4 @MnO and 2′,3′-cyclic GMP-AMP (cGAMP) are prepared as the nanocatalyst for cancer therapy. The ionized Fe 3+ /Fe 2+ redox couple is utilized to initiate the Fenton reaction. Intracellular GSH level can thus be efficaciously controlled, and peroxide oxidation is catalyzed to produce excessive ROS. Meanwhile, cGAMP is released to trigger the cyclic GMP-AMP synthase (cGAS)-stimulator of interferon genes (STING) signaling axis. This targeted activation enhances the recruitment of macrophages, stimulates the secretion of critical pro-inflammatory cytokines, and consequently bolsters the efficacy of innate immune responses within the tumor microenvironment.
研究领域:
肿瘤学
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免疫学
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纳米医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Chemical Engineering Journal Advances
·
2021
·
IF 0
Zheng Liu,Xiaodan Wang,Fengyu Lai,Chao Wang,Nan Yu,Hongxia Sun,Baoyou Geng
A three-dimensional MnO/C nanocomposite is fabricated through a simple route of immersion and subsequent calcination. The carbon content and morphology of the sample are adjusted by adjusting the calcination temperature. This material combines the excellent lithium storage performance of MnO and the good stability of carbon. Because MnO is embedded in the three-dimensional carbon networks, it can provide proper space to alleviate the volume effect during discharging and charging. The unique architecture and large surface area enable the composites to exhibit remarkable lithium storage properties with outstanding rate performance, high reversible capacity, and cycle life. The optimized sample (MnO/C-750) has excellent performance of 1067.95 mAh g −1 at 0.2 A g −1 over 200 cycles and 722.32 mAh g −1 at 1 A g −1 over 600 cycles.
研究领域:
材料科学
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能源存储
✓ 已验证
DOI
INORGANIC CHEMISTRY
·
2022
·
IF 5.436
Peng Miao,Zhen Yu,Weixing Chen,Rui Zhou,Weifeng Zhao,Kai-Jie Chen,Jie Kong
High-performance microwave-absorbing materials (MAMs) derived from metal–organic frameworks (MOFs) have attracted considerable attention due to their tunable chemical composition and microstructure. In this contribution, a core–shell-structured Co/MnO/C nanocomplex was prepared using a CoMn-MIL MOF by a facile hydrothermal synthesis and subsequent pyrolysis process. The optimal microwave absorption (MA) property of the as-prepared Co/MnO/C nanocomplex was achieved by the regulation of the Co2+/Mn2+ molar ratio. The minimum reflection loss (RLmin) of the Co/MnO/C-31 nanocomplex was low to −55.0 dB at 16.2 GHz with a thickness of 1.49 mm, and the effective absorption bandwidth (EAB) was high to 5.95 GHz (12.05–18 GHz) at a thickness of 1.8 mm. The mixed-metal nanocomplex with the core–shell structure exhibited outstanding MA performance, corresponding to the synergetic effect of the magnetic and dielectric loss. It provides a high efficiency strategy for rendering low reflection loss and broad EAB to high-performance MAMs.
研究领域:
材料科学
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电磁学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2021
·
IF 8.128
Xiaoming Yu,Weixin Chen,Junjie Cai,Xia Lu,Zhipeng Sun
A modified separator for improving the electrochemical performance in Li-S batteries is fabricated by functional composites coating, comprised of MnO nanoflakes with rich oxygen vacancies and N doped carbon nanotubes (MnO-OVs/NCNTs). On the one hand, MnO as a polar material can anchor lithium polysulfides (LiPSs) on the interface via chemical bonding. In addition, introducing oxygen vacancies into MnO by heat treatment under a reducing atmosphere can regulate the electronic structure and provide extra active sites for further boosting the chemical adsorption capability of LiPSs, facilitating the redox reaction of LiPSs, as well as enhancing the electron transfer efficiency. On the other hand, the MnO-OVs/NCNTs layer is a barrier to block the LiPSs directly diffusing through the separator and acts as an upper collector to reduce the interface resistance reactivate the trapped sulfur species, thereby enhancing the sulfur utilization. Given these advantages, the MnO-OVs/NCNTs modified separator employed in Li-S batteries exhibit considerable capacity (1516 mAh g −1 at 0.1C), enhanced long-term cycling stability (capacity retention of 618 mAh g −1 for over 500 cycles at 1C), and rate performance (550 mAh g −1 at 3C).
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ELECTROANALYSIS
·
2023
·Vol. 36
·期 4
·e202300371
·
IF 3
Wenjing Liu,Sumin Xu,Jinjin Zhang,Qi Wang,Jianying Qu
In this work, manganese-based metal-organic frameworks (MnBDC) were synthesized by solvothermal method and physically mixed with pre-prepared graphene oxide (GO) to obtain GO/MnBDC, which were calcined to give MnO@C composite coated with reduced graphene oxide (rGO) marked as rGO/MnO@C. The materials were characterized by SEM, XRD, FTIR and XPS. Based on this composite, a novel sensor was constructed on a glassy carbon substrate, which exhibited good electrocatalytic activities to the redox reactions of catechol (CC) and hydroquinone (HQ), enabling simultaneous detection of both analytes. Under optimized conditions, the electrochemical sensor demonstrated a linear range of 0.50–90.00 μM for both CC and HQ detection, with respective detection limits of 0.05 μM and 0.03 μM. Moreover, the sensor exhibited excellent sensitivity, selectivity and accuracy for detecting CC and HQ simultaneous in real samples.
研究领域:
材料科学
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分析化学
✓ 已验证
DOI
高影响因子
FUEL
·
2025
·
IF 7.5
Yaoqi Huang,Yanxu Wang,Lingwen Song,Yi Yuan,Shaojun Yuan
Hydrogen sulfide (H 2 S) is a hazardous and malodorous pollutant with severe environmental and health impacts. A promising approach for H 2 S removal involves coupling adsorption with low-temperature catalytic oxidation using alkaline metal oxide-loaded carbon-based materials. However, the effectiveness of these materials is often limited by pore blockage caused by metal oxides and desulfurization byproducts. N-doped carbon aerogels offer a solution to this issue due to their large specific surface area and well-developed pore structure. In this study, a novel MgO-MnO-loaded N-doped carbon aerogel (MgO-MnO/NC) was synthesized by one-step high-temperature pyrolysis of cellulose-based aerogel precursor for highly efficient low-temperature H 2 S desulfurization. The effects of pyrolysis temperature and metal oxide loading on H 2 S removal efficiency was systematically investigated. The optimized MgO-MnO/NC-600–0.3 (where 600 represents the pyrolysis temperature and 0.3 denotes the mass ratio of metal salts to cellulose) exhibited outstanding H 2 S removal performance, achieving an ultrahigh desulfurization capacity of 1696 mg/g. The desulfurization conditions, such as O 2 content and relative humidity, were found to play a crucial role in the H 2 S removal process. In situ DRIFTS and XPS analyses revealed a synergistic mechanism of reactive adsorption and catalytic oxidation on the MgO-MnO/NC surface. The desulfurization products were identified as sulfur, sulfate and metal sulfide (MgS and MnS). This study not only proposes a feasible strategy for fabricating biomass-derived aerogel carbon, but also offers valuable insights into the catalytic oxidation of H 2 S for enhancing the desulfurization performance of N-doped carbons.
研究领域:
环境科学
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材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2023
·
IF 6.4
Shaowen Dong,Haitao Geng,Wence Yue,Shumin Zheng,Xiaowan Pang,Jie Liang,Gaojun An,Wangliang Li,Bao Wang,Changbo Lu
Lithium-ion batteries (LIBs) have been extensively employed in a range of electrical vehicles and portable devices in virtue of their high energy density and stable cycle life. However, poor performance under low temperatures hinders their application in cold climates and regions. Herein, single-shell (carbon) multiple-core (ultra-small MnO@C nanoparticles) hollow carbon nanospheres (MnO@C@HCS) were prepared by a sacrificial template method, and MnO@C@HCS showed excellent low-temperature electrochemical performance. These MnO@C cores with large surface areas can shorten diffusion lengths of lithium ions and enhance diffusion rates along their rich grain boundaries, enabling rapid charging/discharging. The hollow carbon nanosphere with a porous shell can block serious agglomeration of nanoparticles and regulate the amount of electrolyte filled in the hollow nanosphere to reduce side reactions between highly active electrode materials and electrolytes. The hollow structure formed between the core and the shell mitigates the volume expansion and contraction during cycling. The MnO@C@HCS anode exhibits high specific capacities (1027 mAh g–1 at 0.20 A g–1) and high rate performance (353 mAh g–1 at 10.00 A g–1) under room temperature. Furthermore, the MnO@C@HCS anode maintains a satisfactory discharge capacity under low temperatures (461 mAh g–1 at 0.05 A g–1 under −10 °C, 220 mAh g–1 at 0.10 A g–1 under −20 °C, respectively). The contribution of pseudocapacitance to the capacity decreases as the test temperature drops. Our strategy provides a design concept for the high-performance anode for low-temperature lithium storage.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Yuxuan Wu,Yinda Li,Yunhao Lu,Jicheng Jiang,Aijun Zhou,Bo Xu,Xiongwen Xu,Jian Tu,Bin Pan,Xinbing Zhao,Jian Xie
Among some practical O3-type layered oxide cathodes, NaNi 1/3 Fe 1/3 Mn 1/3 O 2 (NFM) features a high specific capacity and moderate cyclability. However, sluggish Na + transfer kinetics, low structural stability, and rapid capacity loss during long-term cycling, are still posing a challenge to commercial applications of this material. In this work, we propose a Mg and Cu co-doped O3-type NaMg 0.02 Cu 0.02 Ni 0.33 Fe 0.27 Mn 0.36 O 2 (MC-NFM) with a stable structure and good cycling stability. It was found that the Mn O bonds in MC-NFM are obviously reinforced by synergistic doping with small amounts of Mg and Cu, leading to enhanced structural robustness, decreased Na + migration barrier, and delayed O3-P3 phase transition. As a result, longer cycle life and enhanced rate performance are achieved. MC-NFM can yield a specific capacity of 142.1 mAh g −1 at 0.1C and 116.0 mAh g −1 at 5C, and maintain 83.6 % of its initial capacity after 400 cycles at 1C. This work provides a promising design of O3-type cathode for sodium-ion batteries.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
Journal of Cleaner Production
·
2025
·
IF 10
Hongguang Zhang,Zi Yu,Yongxin Liang,Tao Gan,Zuqiang Huang,Huayu Hu,Yanjuan Zhang
The utilization of organic molecules as in-situ hydrogen donors for producing γ-valerolactone (GVL) biofuel from biomass-derived levulinic acid (LA) represents one of the promising sustainable approaches. However, this process still faces challenges, including the difficult activation of the hydrogen source and the transport limitations of active hydrogen species. Herein, a Co-MnO/spontaneously polarized ceramic-carbon (Co-MnO/SPCE-C) composite catalyst, featuring a unique spontaneous polarization effect, was developed for catalytic transfer hydrogenation (CTH) of LA to GVL in the isopropanol/H 2 O (volume ratio = 1/19) cosolvent system. Co-MnO/SPCE-C contributed to an outstanding LA conversion of 99.9% and a favorable GVL yield of 93.5%, surpassing the performance achieved by comparative catalysts. Various characterization techniques demonstrate that SPCE with far-infrared emission and surface electric field increased the oxygen vacancies, thereby promoting hydrogen spillover and enhancing the properties of CoO x –MnO acidic sites. The 17 O NMR spectra reveal that SPCE activated water clusters by weakening the hydrogen bonding network. Moreover, D 2 O experiments show that SPCE facilitated the participation of water in the reaction. This work provides valuable insights into the development of an efficient strategy for producing GVL from LA. Before the catalyst can be considered for commercial applications, the focus in the future should be on a comprehensive computational analysis, long-term evaluation of catalyst stability, and additional industrial-scale testing.
研究领域:
化学工程
·
材料科学
·
催化反应
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 8
·1370
·
IF 5.719
Cong Tian,Zhe Tang,Yike Hou,Asim Mushtaq,Shafaq Naz,Zhangsen Yu,Jabeen Farheen,Muhammad Zubair Iqbal,Xiangdong Kong
Significant attention is paid to the design of magnetoplasmonic nanohybrids, which exploit synergistic properties for biomedical applications. Here, a facile method was employed to prepare plasmonic magnetic Au-MnO heterostructured hybrid nanoparticles for imaging-guided photothermal therapy of cancers in vitro, with the view to reducing the serious drawbacks of chemotherapy and gadolinium-based contrast agents. The biocompatibility of the prepared Au-MnO nanocomposites was further enhanced by Food and Drug Administration (FDA)-approved triblock copolymers Pluronic®F-127 and chitosan oligosaccharide (COS), with complementary support to enhance the absorption in the near-infrared (NIR) region. In addition, synthesized[email protected]nanocomposites exhibited promising contrast enhancement in T1MR imaging with a good r1relaxivity value (1.2 mM−1s−1), demonstrating a capable substitute to Gd-based toxic contrast agents. In addition, prepared[email protected]hybrid nanoparticles (HNPs) produced sufficient heat (62 °C at 200 μg/mL) to ablate cancerous cells upon 808 nm laser irradiation, inducing cell toxicity, and apoptosis. The promising diagnostic and photothermal therapeutic performance demonstrated the appropriateness of the[email protected]HNPs as a potential theranostic agent.Keywords:plasmonic nanoparticles;magnetic nanocomposites;T Magnetic contrast agents;photothermal therapy;cancer theranostics
研究领域:
纳米技术
·
生物医学工程
·
材料科学
·
癌症研究
·
诊疗学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）