JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Jufeng Zhang,Ting Ren,G.P. Nayaka,Peng Dong,Jianguo Duan,Xue Li,Yingjie Zhang,Ding Wang
Investigating independent active materials is inadequate to settle the technological challenges involved in the booming lithium ion battery industry. The further development of energy-storage properties with both high energy density and superior cycling lifespan are highly dependent on the overall system optimization, which highlights the study of the interface between different components in a system. Herein, a system-level strategy of engineering MnO-based anode build on the plentiful electrolytic manganese dioxide are developed via a microwave-assisted carbothermic reduction , combined with a succeeding in-situ aggregation of polydopamine (PD) onto MnO along with chemical binding with polyacrylic acid (PAA) binder. Fourier transform IR spectra , X-ray photoelectron spectroscopy spectra validate the formation of cross-linking reaction between the PD buffer and PAA binder. Benefited from the prominent structure stability which endowed by well-connected three-dimensional porous structure , as well as two steady interfaces between MnO and PD buffer and between PD buffer and PAA binder, the cross-linked MnO anode exhibit a reversible capacity of 687 mAh g −1 at 300 mA g −1 and high Coulombic efficiency of 99% over 500 cycles and impressive rate capability of 320 mAh g −1 at 3000 mA g −1 .
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
界面化学
·
电池技术
·
高分子化学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Lianbang Wang,Jing Zhan,Jinpei Hei,Liwei Su,Huan Chen,Hao Wu,Yuanhao Wang,Hongxia Wang,Manman Ren
As promising electrode materials for supercapacitors , manganese oxides still have big challenges such as the low material utilization and poor ionic/electronic conductivity. Reducing particle sizes through nanotechnology has been used to improve material conductivity and electrochemical active sites at materials/electrolyte interfaces. Nevertheless, the extremely small particle size may result in physical and/or chemical instability, mass loss and subsequent capacitance attenuation. Understanding this trade-off effect of electrode materials size with their electrochemical properties is critical to fabricate high-performance supercapacitors. In this work, we prepare homogenous and size-tunable MnO particles (with mean diameters of 80, 41, 20, 15 and 9 nm) on carbon cloth via a facile gel-like film assisted method. It is found that the medium-size nanoparticle (20 nm) displays the best performance instead of the smallest one. These observations are different from the traditional view about material size-property relationship. Instead this work provides a new insight referring to both the size-dependent solubility and ionic/electronic transport. Beneficial from the good flexibility and high conductivity/stability of carbon cloth, the optimized MnO/carbon cloth electrode demonstrates extraordinary performance in symmetric solid-state supercapacitors with energy densities of 86 and 70 Wh kg −1 at the power densities of 450 W kg −1 and 9 kW kg −1 , respectively.
研究领域:
材料科学
·
电化学
·
纳米技术
·
能源存储
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2023
·
IF 7.2
Xiaowei Guo,Yang Yuan,Shanshan Li,Jingwen Wang,Zhengyu Bai,Lin Yang
Owing to the unique geometric and electronic structure, design and synthesis of electrocatalysts with well defined heterointerfaces are essential for clean energy technologies, for instance water-splitting and Zn-air batteries. Herein, a bifunctional electrocatalyst assembled by Co/MnO nanoparticles and nitrogen doping double-sphere carbon (denoted as Co/MnO@N-DSC), was fabricated via a solvothermal and pyrolysis strategy. The Co/MnO@N-DSC catalysts exhibit an enhanced bifunctional oxygen electrocatalytic performance for Oxygen reduction reaction (ORR) (E 1/2 , 0.84 V vs . RHE) and oxygen evolution reaction (OER) (E onset , 1.54 V vs . RHE). As an air cathode catalyst, the Co/MnO@N-DSC-based Zn-air battery can afford prime performance, over the commercial noble-metal-based Zn-air battery. Theoretical calculation results indicate that the synergism of Co (111)/MnO (200) heterointerfaces can enhance charge transfer and provide extra electrons for the reaction processes. This work provides a promising manoeuvre to uplift bifunctional catalytic activity by increasing the synergy from heterointerfaces of transition-metal/metal oxide in oxygen electrocatalysis .
研究领域:
能源材料
·
电催化
·
纳米材料
·
可再生能源技术
·
电池技术
✓ 已验证
DOI
高影响因子
AICHE JOURNAL
·
2025
·
IF 4
Haichao Zhou,Jianglin Liu,Dalang Chen,Yanlin Qin,Tiejun Wang,Xueqing Qiu,Xuliang Lin
The electrochemical conversion of glycerol into dihydroxyacetone (DHA) under mild conditions efficiently addresses glycerol surplus, enhancing its economic value. However, DHA production efficiency remains constrained by steric hindrance from secondary hydroxyl groups and sluggish glycerol electro-oxidation reaction (GOR) kinetics in weakly alkaline conditions. Herein, lignin-derived carbon-supported MnO–Ni heterojunction catalyst (MnO–Ni/C) is synthesized via self-assembly precipitation and in situ pyrolysis. The optimized MnO–Ni/C catalyst requires a low potential of 1.58 V to achieve 10 mA cm −2 , 270 mV lower than the oxygen evolution reaction (OER). It attains a 53.37% DHA selectivity with a high production rate of 864.75 mmol m −2 h −1 at 1.8 V. MnO–Ni/C heterostructures modulate the local electronic structure of Ni sites, optimizing glycerol adsorption configuration and enhancing selective adsorption of secondary hydroxyl groups and oxygen active species near the electrode surface. These synergistic effects significantly improve GOR kinetics and DHA production efficiency.
研究领域:
电催化
·
可再生能源转化
·
材料科学
·
环境化学
·
绿色化学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2017
·
IF 3.887
Xiaoxin Yang,Li Zhao,Luyi Zheng,Meiyun Xu,Xiulan Cai
An efficient surface engineering strategy for MnO nanoparticles was developed to attain enhanced colloidal stability, selective uptake by and toxicity to specific cancer cells. Specifically, MnO nanoclusters prepared by polyol method were grafted with polyglycerol (MnO-PG), and then conjugated with arginine-glycine-aspartate peptide (MnO-PG-RGD) through stepwise organic reactions. The physicochemical properties of the surface engineered MnO nanoclusters were characterized by powder X-ray diffraction, Fourier transform infrared spectroscopy, thermogravimetric analysis, dynamic light scattering, zeta potential, transmission electron microscopy and high-resolution transmission electron microscopy. The grafted PG layer not only largely enhanced the dispersibility and colloidal stability of MnO nanoclusters in physiological media, but also effectively inhibited non-specific cellular uptake of MnO-PG. MnO-PG-RGD was selectively taken up by human glioblastoma U87MG cells overexpressing α vβ3 integrins through receptor-mediated endocytosis. The internalized MnO-PG-RGD was mainly located in the lysosomes of U87MG cells. The acidity of lysosomes accelerated Mn 2+ ions releasing, which promoted intracellular oxidative stress and further led to cell damage and apoptosis. The results indicate that appropriate surface functionalization can enable MnO nanoparticles to act as a potential anticancer agent in addition to their MRI functionality.
研究领域:
纳米技术
·
生物医学工程
·
癌症研究
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Chenghong Sun,Enze Zhu,Chaoyang Shi,Juan Yu,Shubiao Yin,Chunxia Liu,Xiaoying Cui,Weiping Liu,Mingli Xu
The vigorous development of efficient cathode-side oxygen reduction reaction (ORR) catalysts is one of the keys to the practical application of fuel cells and Zn-air batteries (ZABs). Herein, a facile and green photochemical method is developed to synthesize pure-phase Mn 3 O 4 nanoparticles , which are uniformly anchored on nitrogen-doped reduced graphene oxide (N-rGO), followed by simple one-step annealing to highly catalytical active and stable MnO/N-rGO. The resultant MnO/N-rGO exhibits exciting ORR performance in alkaline media. Particularly, both GDE (gas diffusion electrode) half-cell and ZABs assembled from MnO/N-rGO have excellent overall performance and outstanding long-term durability, obviously better than Pt/C-based GDE half-cell and Pt/C + RuO 2 -based ZABs, respectively. It is mainly attributed to the synergistic effect between MnO nanoparticles and N-rGO support, which significantly increases the active sites and facilitates 4-electron transfer. This research paves a way for the green photochemical synthesis of transition metal oxide ORR catalysts at room temperature.
研究领域:
材料科学
·
电化学
·
能源存储
·
催化
✓ 已验证
DOI
高影响因子
Nano Research
·
2024
·
IF 9.5
Guo Chan,Shao Shiping,Zhang Xin,Tang Yunxiang,Wang Luxue,Liu Jiurong,Wu Lili,Bi Ke,Wang Fenglong
Aerogel-based composites hold promising application prospects as potential electromagnetic wave (EMW) absorption materials, yet the construction of such materials with ingenious microstructures, appropriate magnetic/dielectric multi-components, and integrated multifunctionality remains considerably challenging. Herein, a multicomponent Co/MnO/Ti 3 C 2 T x MXene/rGO (CMMG) hybrid aerogel featured with three-dimensional (3D) vertical directional channel architecture is reported. Benefiting from the synergistic effect arising from the 3D conductive networking structure, diverse heterogeneous interfaces, magnetic/dielectric multicomponent, and multiple loss pathways, the optimized CMMG-2 aerogel delivers fascinating EMW absorption capabilities, characterized by a minimal reflection loss (RL min ) of −77.41 dB and an effective absorption bandwidth (EAB) of 6.56 GHz. Additionally, the remarkable hydrophobicity, exceptional thermal insulation capabilities, and outstanding photothermal properties of CMMG-2 aerogel make it highly promising for multiple application in diverse and demanding environments. Interestingly, the distinctive pore structure of hybrid aerogel also allows it for sensitive and reliable detection of electrical signals caused by pressure changes and human motion. Thus, this research provides a viable design strategy for the development of lightweight, efficient, and multifunctional aerogel-based EMW absorption materials for various application scenarios.
研究领域:
材料科学
·
纳米技术
·
电磁工程
·
热工程
·
传感技术
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2025
·
IF 5.6
Mengmeng Xu,Yuan Liu,Zhe Tang,Xiaolin Yu,Li Gao,Bo Yang,Yan Wang,Xuehui Dong,Qianqian Yu,LinGe Wang
Rational surface engineering of nanocatalysts offers new solutions against antibiotic-resistant infections. We designed and fabricated hierarchical MnO₂@Au@ZIF-67 nanoparticles (NPs) with triple interfacial functionalities for synergistic antibacterial therapy. The acid-responsive ZIF-67 surface degrades in infected wounds, releasing Co²⁺ to catalyze •OH generation via Fenton-like reactions at the material-bacteria interface. Simultaneously, ultrasmall Au surfaces deplete glucose through oxidase-mimetic catalysis, producing gluconic acid that accelerates ZIF-67 dissolution. The MnO₂ core surface decomposes H₂O₂ to supply O₂, enhancing Au catalysis and alleviating hypoxia. Comprehensive surface characterization (TEM, SEM, XPS, XRD) confirmed structural integrity and reactive sites. In vitro , the NPs achieved > 99 % bacterial killing (S. aureus/E. coli ) through ROS-mediated membrane disruption (validated by SEM/CLSM). In vivo , they enabled 98.45 % bacterial clearance and accelerated wound healing via collagen reorganization (H&E/Masson staining). This surface-engineered platform demonstrates how interfacial catalytic cascades can be harnessed for effective non-antibiotic antimicrobial applications.
研究领域:
纳米医学
·
催化治疗
·
抗菌材料
·
伤口愈合
·
纳米催化剂
·
活性氧
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Huipei Zhang,Shengfan Fang,Mengyuan Guo,Zheng Fang,Luyao Qi,Liping Guo,Yanmin Qin,Haifeng Bao
Heterostructure MnO/MnSe nanoparticles, encapsulated in a nitrogen-doped carbon shell (MnO/MnSe@NC), were synthesized as anode materials using a hydrothermal approach followed situ calcination and selenization process. The NC shell, possessing high electronic conductivity , can function as a substrate to prevent nanoparticle agglomeration and mitigate volume variations. The porous nanostructures can shorten the ion diffusion path and increase active sites, thereby accelerating ion migration and ultimately enhancing battery capacity. Moreover, the MnO/MnSe heterostructure can facilitate Li + /Na + diffusion, leading to improved rate performance. Benefiting from the structural advantage of MnO/MnSe heterostructure nanoparticles encapsulated within a nitrogen doped carbon shell, this electrode demonstrates exceptional electrochemical performance as an anode for LIBs , including a high discharge capacity (1740 mAh g −1 at 0.1 A g −1 ), remarking rate capability (849.9 mAh g −1 at 15.0 A g −1 ), and superior cycling stability (802 mAh g −1 over 1500 cycles at 5.0 A g −1 ). Meanwhile, the MnO/MnSe@NC serves as an anode material in SIBs, demonstrating a remarkable reversible specific capacity of 902.8 mAh g −1 at 0.1 A g −1 and excellent rate capability (681.6 mAh g −1 at 15.0 A g −1 ). The present study presents a straightforward approach for fabricating the anode electrode of high-performance lithium/sodium ion batteries.
研究领域:
材料科学
·
电化学
·
纳米技术
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
·
2021
·
IF 2.328
Guanfeng Tian,Youqing Wu,Shiyong Wu,Sheng Huang,Jinsheng Gao
In 2 O 3 , MnO/In 2 O 3 , and MgO/In 2 O 3 catalysts are synthesized by the co-precipitation method and investigated for CO 2 hydrogenation to methanol. The introduction of Mn and Mg oxides dramatically enhances the CO 2 adsorption capacity of In 2 O 3 . The changing trend of methanol selectivity is consistent with the CO 2 adsorption capacity. MnO/In 2 O 3 and MgO/In 2 O 3 catalysts show higher methanol selectivity compared with that of In 2 O 3 .
研究领域:
催化
·
化学工程
·
环境化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Feng Luo,Zhimin Li,Jiyuan Chen,Yuanshui Liu,Linzhuang Xing,Yangxi Yan,Yue Hao
Ecologically sustainable hard type piezoelectric ceramics are highly demanded for high power transducer applications in replacing lead-based piezoelectric ceramics. In this study, MnO was proposed as acceptor dopant to modify the electric properties of 0.75BiFeO 3 -0.25BaTiO 3 piezoelectric ceramics. Results showed that MnO doping reduced the lattice distortion of rhombohedral phase and facilitated the formation of pseudo cubic phase of 0.75BiFeO 3 -0.25BaTiO 3 system. Moreover, it caused the diversity of domain morphology and reduced the domain size as well. XPS analysis indicated that Mn 2+ ions suppressed the transition from Fe 3+ ions to Fe 2+ ions and gave rise to the increase of oxygen vacancies . Accordingly, the introduction of MnO synergistically increases the d 33 , K p , and Q m and lowers the tan δ of 0.75BiFeO 3 -0.25BaTiO 3 ceramics. The abnormal enhancement in hard type properties is ascribed mainly to the increase of extrinsic contribution rather than the pinning effect arising from oxygen vacancies. Finally, based on an optimal 0.75Bi(Fe 0.985 Mn 0.015 )O 3 -0.25BaTiO 3 system, an atomizer prototype was fabricated. The remarkable atomization effect suggests a competitive potential of 0.75BF-0.25BT ceramic for transducer application.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
LASERS IN MEDICAL SCIENCE
·
2025
·Vol. 40
·期 1
·1-11
·
IF 2.4
Ma Dan,Lu Huixiang,Zhang Hai,Liao Anru,Peng Qianrong,Yang Min
Hypoxia poses a significant challenge to the efficacy of photodynamic therapy (PDT) for cancer treatment. This study aims to design and synthesize PEGylated liposomes encapsulating MnO₂, indocyanine green (ICG), and H-chain ferritin (HFn) to potentially address hypoxia and enhance the therapeutic outcomes of PDT. PEGylated liposomes (ICG/MnO₂-HFn-mPEG-DSPE-Lip) were constructed with a rod-like structure, incorporating MnO₂ as a hypoxia-modulating agent and ICG as a photosensitizer. The drug loading capacity, stability and safety of liposomes were characterized. Singlet oxygen quantum yield (Φ Δ ) was measured under simulated tumor microenvironment conditions. In vitro phototoxicity was evaluated using A549 human lung adenocarcinoma cells. Liposomes have a high drug loading capacity, good biocompatibility and good long-term stability. Under tumor-simulated conditions, Φ Δ was significantly improved, increasing from 0.210 for free ICG to 0.507. The liposomes demonstrated remarkable phototoxic effects on A549 cells (90.5% cell death under combined PDT/PTT vs. 15% for free ICG). This nanoplatform proposes a novel strategy to overcome hypoxia-induced PDT resistance, and the enhanced efficacy may be attributed to the increased oxygen supply mediated by MnO 2 carried by HFn. These findings provide important insights for the development of next-generation therapeutic systems targeting tumor hypoxia.
研究领域:
药学
·
肿瘤学
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）