ChemistrySelect
·
2023
·Vol. 8
·期 20
·e202300450
·
IF 2.1
Qiang Liu,Yong Sun,Xianhai Zeng,Lu Lin,Xing Tang
Graphical We report an example of the oxidation of furfural to furancarboxylic acid using NaClO as the oxidant, under heterogeneous catalyst and room temperature conditions. This reaction system is rapidly reactive and suitable for the large-scale production. It is of great significance to efficiently produce furancarboxylic acid (FA) by furfural oxidation at room temperature. Here in, based on an available CuO-MnCO 3 bimetallic catalyst, an efficient and sustainable heterogeneous catalyst system in sodium hypochlorite solution was designed to be served for the selective oxidation of furfural to FA. Interestingly, Cu 6 -Mn 4 showed 100 % furfural conversion and quantitative selectivity to FA (96.9 %). Especially, we demonstrate the CuO exhibited main catalytic performance in this experiment. In particular, the introduction of MnCO 3 into Cu-Mn catalyst resulted in an increase reactivity of the lattice oxygen in the catalyst. More importantly, Cu 6 -Mn 4 also showed excellent stability in reusability test. This study provides a simple and rapid catalytic strategy and scientific basis for the development of an efficient and mild aerobic oxidation of furfural.
研究领域:
催化化学
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有机合成
·
绿色化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2022
·Vol. 46
·期 14
·19686-19696
·
IF 4.672
Feng Wang,Yinrong Lv,Xueli Bai,Shengjian Zhang,Huifang Wang,Baoyi Li,Aifang Liu,Xiaoping Zhang
Summary Polyhydride electrocatalysts integrated directly into metal substrates have attracted attention because they can provide high electrochemical specific surface area and excellent mechanical properties. In this work, through the classical hydrothermal method and subsequent phosphating procedure, we synthesized for the first time an electrocatalyst with a pyramid-shaped MnCO 3 as the main structure, P and Co as co-doping elements, named Co, P-MnCO 3 , and used it as hydrogen evolution reaction (HER). The experimental results show that the excellent catalytic activity in alkaline media, with current densities of 10 and 200 mA∙cm −2 at 61 mV and 158 mV and low overpotentials, which are better than P-Co (108/234 mV) and P-MnCO 3 (175 mV/340 mV), etc. it has more electrochemically active sites, faster charge transfer rate and lower resistance. The excellent electrochemical properties benefit from the unique highly active binary Co, P-MnCO 3 pyramid brick sites shortened the ion transfer distance and optimized synergistic effect between the doped metal elements (Co,P between MnCO 3 ), the porous connection between Co, P-MnCO 3 and the high conductivity substrate, increased the electron-transfer efficiency between the substrate and material, accelerating the conversion of H + to H 2 ; facilitated the release of bubbles and provided excellent mechanical properties for improved catalyst stability. This work provides a new idea for the synthesis of multi-element electrocatalysts.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Binbin Zhang,Xin Li,Jianli Zou,Franklin Kim
Diffusion-driven layer-by-layer (dd-LbL) assembly is a simple yet versatile process that can be used to construct graphene oxide (GO) into a three-dimensional (3D) porous framework with good mechanical stability. In particular, the oxygen functional groups on the GO surface are well retained, providing nucleation sites for further chemical reactions to be performed upon. Therefore, such a scaffold should serve as a promising starting material for creating a wide range of 3D graphene-based composites while maintaining a high accessible surface area. Herein, we demonstrate the use of the porous GO macrostructure derived from dd-LbL assembly for the preparation of graphene–MnCO3 hybrid structures. MnCO3 is a newly reported pseudocapacitive material for supercapacitors; however, its electrochemical performance is hampered by its low electrical conductivity and poor chemical stability. Through reaction between KMnO4 and GO during a hydrothermal process, the surface of the porous scaffold was rendered with uniform MnCO3 nanoparticles. With the reduced graphene oxide (rGO) sheets serving as the conductive backbone, the resultant MnCO3 nanoparticles exhibited a capacitance of 698 F g–1 at a charge/discharge current of 0.5 mA (320 F g–1 for the combined rGO and MnCO3 composite). Furthermore, the electrode maintained 77% of its initial capacity even after 5000 cycles of charge/discharge tests at 20 mA.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Biomaterials Science
·
2025
·
IF 5.7
Lihui Yuwen,Yuan Liu,Fengjiao Xu,Chi Zhang,Xiaolong Chen,Zhaowei Yin,Bin Liang,Lianhui Wang
Bacterial biofilms are difficult to treat with traditional antibiotics. Ultrasound (US)-responsive antibacterial agents have emerged as promising alternatives for the treatment of bacterial biofilm infections. However, they often suffer from antibiotic dependence, lack of targeting, and low antibacterial efficiency. Herein, we develop Fe3O4/MnCO3 microbubbles (FMMB) by self-assembly of Fe3O4 nanoparticles (Fe3O4 NPs) and MnCO3 nanoparticles (MnCO3 NPs). By the direction of magnetic field (MF), FMMB can be targeted to the Staphylococcus aureus (MRSA) biofilm. Under US irradiation, FMMB can destroy the structure of MRSA biofilms by cavitation-induced mechanical effects and kill bacteria by MnCO3 NPs generated reactive oxygen species (ROS) through the sonodynamic effect. In the mice model with catheter MRSA biofilm infection, FMMB removed 70.4% of the biofilm with MF and US, and the bacteria inactivation efficiency reached as high as 99.999% (4.9 Log). This work develops multifunctional microbubbles with both US-responsive mechanical and sonodynamic effects for biofilm destruction and MF-responsive properties for biofilm targeting, which provides a promising strategy for the design of antibiofilm agents to effectively treat bacterial biofilm infections.
研究领域:
医学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 7
·2712-2720
·
IF 6.4
Shuang Luo,Jien Li,Pengfei Xu,Xiangyu Han,Lin Chen,Chenguo Hu
Ni–Mn-based binary oxides are deemed as a promising commercial electrode material for supercapacitors (SCs) due to their low price, environmental friendliness and high theoretical capacitance. However, their low electrical conductivity and narrow potential window limit their electrochemical performance. Herein, we prepare a composite of Ni6MnO8 and MnCO3 grown in situ on activated carbon cloth (NMO-x@ACC, x = 1, 2, 3) at a low temperature as an electrode for aqueous supercapacitors. By a component optimization and morphology control strategy, nano-flake and wheat-shaped NMO-2@ACC (Ni/Mn = 1) shows outstanding capacitance performance up to 1450 mF cm−2 at 2 mA cm−2 within the 0–1 V potential window. The assembled NMO-2@ACC aqueous SC displays a wide potential window of 1.8 V in 1 mol L−1 LiNO3 electrolyte, and the maximum energy density reaches 4.061 mW h cm−3. After 6000 cycles, the capacitance remains at 90.1%, showing good stability. In addition, two devices connected in series can light up 72 LEDs for more than 2 minutes, which demonstrates an excellent practical application prospect. This strategy of proportion control and morphology optimization provides a new strategy for the preparation of high-performance Ni–Mn based electrode materials.
研究领域:
材料科学
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电化学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2021
·
IF 8.067
Jingqi Chen,Xianlei Hu,Haitao Gao,Shu Yan,Shoudong Chen,Xianghua Liu
Developing new electrode materials with a high specific capacity for excellent lithium-ion storage properties is very desirable. The MnCO 3 /Mn 3 O 4 nanoparticles with uniform size (about 50 nm) and shape which are wrapped with graphene have been successfully synthesized via the one-step method for anode material of lithium-ion batteries. The as-prepared graphene-wrapped MnCO 3 /Mn 3 O 4 nanocomposite exhibits remarkable electrochemical performance, including high reversible specific capacity, outstanding cycling stability, and excellent rate capability in comparison with the bare MnCO 3 and MnCO 3 /Mn 3 O 4 nanocomposite. This is because the synergistic effect of MnCO 3 and Mn 3 O 4 nanoparticles and graphene nanosheets act as both electron conductors and volume buffer layers. From the scanning electron microscopy (SEM) analysis, we confirmed that the morphology and structure of the composite are preserved after 200 cycles. This further confirms that graphene-wrapped MnCO 3 /Mn 3 O 4 nanocomposite acts as a stable template for reversible lithium-ion intercalation/deintercalation.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 5
·1094
·
IF 4.2
Hui Liang,Yongxin Zhao,Tongjin Liu,Ruijuan Li,Rumei Li,Yuxiao Zhu,Feng Fang
Zn-doped MnCO3/carbon sphere (Zn-doped MnCO3/CS) composites were synthesized using a simple hydrothermal procedure. Among various samples (ZM-50, ZM-05, and ZMC-0), the ternary Zn-doped MnCO3/CS (ZMC-2) catalyst demonstrated excellent visible light-induced photocatalytic activity. This improvement comes from the Zn addition and the conductive CS, which facilitate electron movement and charge transport. The catalyst exhibited efficient degradation of methylene blue (MB) over a wide pH range, achieving a removal efficiency of 99.6% under visible light. Radical trapping experiments suggested that •OH and •O2−played essential roles in the mechanism of organic pollutant degradation. Moreover, the catalyst maintained good degradation performance after five cycles. This study offers valuable perspectives into the fabrication of carbon-based composites with promising photocatalytic activity.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS LETTERS
·
2023
·
IF 3
Siqi Li,Yanan Wei,Qiong Wu,Yuan Han,Rongmei Liu,Guixiang Qian,Chao Yang
The spiny spherical MnCO 3 @MnO 2 cathode material for aqueous zinc ion batteries was designed and constructed. Electrochemical test results revealed that, the spiny spherical MnCO 3 @MnO 2 cathode material had an initial discharge capacity of 598.2 mAh/g at a current density of 0.2 A/g. As the current density increased with the gradient and then decreased to 0.2 A/g, the specific capacity remained at 541.5 mAh/g, indicating the superior performances compared to that of MnCO 3 . This research showed that this spiny spherical MnCO 3 @MnO 2 has distinctive structural characteristics and can easily embed zinc ions, demonstrating a competitive cycle stability in aqueous systems.
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
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Hui Hua Peng,Liang Zhang,De Yi Jiang,Jie Chen
Rhombohedral MnCO 3 nanoparticles were successfully grown on nickel foam via a facile and one-pot water-bath means, wherein the hydrolyzation of urea supplied alkali and carbonate ions. The structure and morphology of the nanocomposites were investigated by XRD, FIB/SEM and elemental mapping. Microscopic investigations revealed MnCO 3 particles with mean sizes that varied from 110-255 nm. EDS mapping showed a homogeneous distribution of manganese, carbon and oxygen. The electrochemical properties of the produced composites were estimated by cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) and electrochemical impedance spectroscopy (EIS) measurements using 6 M KOH as the electrolyte. The resulting electrodes displayed maximum specific capacitance (163.7 F g -1 at 0.5 A g -1 ), respectable rate capability, and excellent long-term cycling life (91% retention after 1000 cycles). In addition, this manuscript offers us a simple and rapid strategy for the fabrication of electrode materials for use as energy storage devices.
研究领域:
材料科学
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电化学
·
纳米科技
·
能源存储
·
功能材料
✓ 已验证
DOI
高影响因子
Science China-Technological Sciences
·
2024
·
IF 4.4
Li Tao,Dai GeLiang,Liu SiYu,Zhang JingYu,Sun AoKui
Owing to severe agglomeration of manganese carbonate (MnCO 3 ) during its synthesis, it exhibits rapid decay cycle performance when used as a cathode material in aqueous zinc ion batteries. To overcome this drawback, we synthesized a MnCO 3 material with carbon nanotubes (CNTs) (i.e., MnCO 3 @CNTs) via a one-step solvothermal method using a hybrid modification strategy. MnCO 3 nanospheres were grown in-situ on a two-dimensional (2D) plane that was orderly interwoven by tubular single fibers of carbon to form a leaf-like nanosheet structure. The surface area of the MnCO 3 @CNTs material was enlarged enormously through the special nanosheet structure, and its stability was improved by the supporting structure of the CNTs. As a result, the MnCO 3 @CNTs exhibited a discharge capacity of 247.6 mAhg −1 at a current density of 0.1 A g −1 . The energy storage mechanism of MnCO 3 @CNTs was further explored using a series of electrochemical kinetic analyses and ex-situ characterization tests. This modification method not only broadens the application field of MnCO 3 , but also provides the possibility of modifying more cathode materials.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2019
·Vol. 45
·期 8
·10028-10034
·
IF 3.45
Dengwei Hu,Fan Zhao,Lei Miao,Zhen Zhang,Yan Wang,Hualei Cheng,Yinfeng Han,Meijuan Tian,Hongxi Gu,Rong Ma
The present work investigated the effect of the addition of V 2 O 5 and MnCO 3 on the microstructure and magnetic properties of Ni-Zn ferrite ceramic samples prepared by a conventional ceramic sintering method at different temperatures. With this aim, a series of samples were prepared by varying the loadings of V 2 O 5 -MnCO 3 (un-doped, 0.4–0.1 wt%, 0.1–0.4 wt%, 0.2–0.3 wt%, 0.3–0.2 wt%, and 0.5–0.1 wt%, denoted as sample 1, sample 2, sample 3, sample 4, sample 5, and sample 6, respectively). The initial permeability and power loss of the different Ni-Zn ferrites were investigated with respect to the sintering temperature . The V 2 O 5 and MnCO 3 dopants significantly improved the initial permeability and power loss characteristics of the Ni-Zn ferrite at frequencies ≥0.5 MHz. When sintered at 1100 °C, sample 2 showed a maximum initial permeability of 931.23 H/m at a frequency of 1 MHz combined with a minimum power loss of 339.2 kW/m 3 . Co-doping with V 2 O 5 and MnCO 3 also resulted in the sintered samples with larger average grain sizes and higher density, while the sintering temperature of Ni-Zn ferrites was significantly reduced.
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2018
·Vol. 22
·期 11
·3485-3491
·
IF 2.509
Su Danyang,Wang Jing,Yang Zhao,Liu Shuang,Yang Jinping,Yao Shaowei,Feng Xiaoxin
The self-assembled hierarchical MnCO 3 /MWCNT nanoarchitectures are prepared by a facile solvothermal method and used as anode material for lithium-ion batteries. The results of SEM and TEM show that the hierarchical nanorods are made of the primary MnCO 3 nanocrystals. The hierarchical nanorods MnCO 3 are heterogeneously distributed among retiform MWCNTs. Those MnCO 3 /MWCNT nanoarchitectures are able to buffer the physical aggregation of the MnCO 3 nanorods and volume expansion of MnCO 3 in the charge/discharge process. The self-assembled hierarchical MnCO 3 /MWCNT nanocomposite delivers a reversible capacity of 704 mAh g −1 after 110 cycles at a current density of 100 mA g −1 . The excellent electrochemical performance is attributed to the self-assembled hierarchical MnCO 3 /MWCNT nanoarchitectures and the high conductivity of MWCNTs.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）