ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Shouji Huang,Huapeng Li,Guobao Xu,Xiong Liu,Qi Zhang,Liwen Yang,Juexian Cao,Xiaolin Wei
We develop a facile and low-cost method to construct porous N-doped carbon sheets wrapped MnO cubes with average size of 150 nm in 3D carbon networks by one-step pyrolysis strategy. The unique and novel nanostructure not only provides holes to promote fast ion transport and conductive framework to enhance the charge transfer, but also effectively supplies an elastic buffer space to accommodate volume expansion during cycling. Furthermore, kinetic analysis and other tests reveal that capacitive-controlled Li storage is a vital way and further oxidation of Mn 2+ to a higher state with cycling contributes a lot of capacity. As a result, the composite electrode shows high specific capacity of 917 mAh g −1 at 0.2 A g −1 after 190 cycles, outstanding rate capability of 328 mAh g −1 at 5 A g −1 , and long cycling stability (655 mAh g −1 at 1 A g −1 after 550 cycles, capacity retention of 105%). Furthermore, the composite electrode and LiFePO 4 are used as anode and cathode to assemble full cell which also exhibits excellent rate capability and cycling stability, indicating great application potential. The simple and low-cost strategy of synthetizing the unique nanocomposite structure can also be applied to other composite anode materials for lithium-ion batteries.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Baochan Yang,Qingyun Liu,Xiuxiu Yao,Dongsheng Zhang,Zhichao Dai,Ping Cui,Gaorui Zhang,Xiuwen Zheng,Dexin Yu
Reactive oxygen species (ROS)-based anticancer therapy methods were heavily dependent on specific tumor microenvironments such as acidity and excess hydrogen peroxide (H2O2). In this work, an acidity-sensitive nanotheranostic agent (FePt@MnO)@DSPE-PEG5000-FA (FMDF NPs) was successfully constructed for MR imaging guided ferroptosis chemodynamic therapy (FCDT) of cancer. The FMDF NPs could specifically target folic acid (FA) receptor-positive tumor cells (HeLa etc.) and induce ferroptosis efficiently by rapidly releasing active Fe2+ to catalyze intracellular H2O2 into ROS based on Fenton reaction. On the other hand, the Mn2+ could also be released due to acidity and further coordinate with GSH to enhance the longitudinal-transverse relaxivity (T1/T2-weighted MR imaging), which could obviously strengthen the contrast distinction between solid tumors and the surrounding tissue to accurately real-time monitor the tumor location. Furthermore, the in vivo anticancer study revealed that the growth of solid tumor models could be suppressed remarkably after treating with FMDF NPs and no obvious damage to other major organs. Therefore, the FMDF NPs were competent simultaneously as an enhanced imaging diagnosis contrast agent and efficient therapy agent for promoting more precise and effective treatment in the bionanomedicine field.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Materials Interfaces
·
2019
·Vol. 6
·期 12
·1900335
·
IF 4.713
Xiaoyan Wang,Liujia Ma,Qing Ji,Jian-Qiang Meng,Suzhe Liang,Zhuijun Xu,Meimei Wang,Xiuxia Zuo,Ying Xiao,Jin Zhu,Yonggao Xia,Peter Müller-Buschbaum,Ya-Jun Cheng
MnO holds a great promise as an alternative lithium-ion battery anode. It is crucial to improve the cyclic stability and rate capability of MnO-based anodes. A facile scalable strategy to incorporate metal nanoparticles into the MnO/carbon anodes is developed as demonstrated by the MnO/Ag/C and MnO/Ni/C nanohybrids. Difunctional methacrylate monomers are used as solvent and carbon source, where the precursors of MnO and metal are homogeneously mixed at the molecular level and converted into a thermosetting polymer. MnO and metal nanoparticles are in situ formed and homogeneously embedded in the in situ formed carbon matrix after the carbonization process. The influence of the metal nanoparticles on the structure and properties of the MnO-based anodes is systematically investigated. The mass composition of the MnO phase within the nanohybrid is controlled to be at a relatively low level, which is helpful for maintaining a good cyclic stability at the expense of the reversible capacities. However, the reversible capacities are increased by the incorporation of the metal nanoparticles due to enhanced electrochemical kinetics, where both excellent cyclic stability and rate performance are exhibited simultaneously. The mechanism responsible for the performance improvement is explored by electrochemical impedance spectroscopy, cyclic voltammetry, and temperature-dependent resistivity measurements.
✓ 已验证
产品关联
DOI
高影响因子
Nano Research
·
2017
·Vol. 11
·期 2
·1135-1145
·
IF 7.354
Jia Jingchun,Hu Xiang,Wen Zhenhai
A strategy was developed to fabricate a set of MnO@C nanohybrids with MnO nanoparticles (NPs) embedded in an ultrathin three-dimensional (3D) carbon framework for use as anode materials for lithium-ion batteries (LIBs). The 3D carbon frameworks provide MnO NPs with electrical pathways and mechanical robustness, which efficiently improved the reaction kinetics, prevented the MnO from fracturing and agglomerating, and limited the formation of a solid electrolyte interface (SEI) at the MnO–electrolyte interface. Benefitting from the unique 3D framework structure, the MnO/C nanohybrids carbonized at 500 °C exhibited a highly reversible specific capacity of 1,420 mAh·g −1 at 0.2 A·g −1 , excellent cycling stability with 98% capacity retention, and enhanced rate performance of 680 mAh·g −1 at 2 A·g −1 . The feasibility of the large-scale production of such MnO/C nanohybrids, associated with their outstanding Li-ion storage properties, opens a promising avenue for the development of high-performance anodes for nextgeneration LIBs.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Zheng Lu,Xuyang Wu,Xiaoqing Zhang,Chun Wang,Tong Zhang,Kang Li,Furui Gu,Chun Li,Wei Yuan,Yong Tang
Owing to their excellent theoretical capacity, the metal oxide/carbon composites derived from metal-organic frameworks (MOFs) show significant potentials as excellent anodes for lithium-ion batteries (LIBs). However, the metal oxides in the MOF-derivatives are usually in the form of crystals, resulting in the poor electrochemical performance. In this study, the pore-rich Co/MnO@C composite with low crystallinity (Co/MnO-LC@C) was in-situ synthesized via the pyrolysis of MnCo-MOF-74 precursor and proposed as advanced anode for LIBs. The active materials with low crystallinity uniformly distributed within the carbon skeleton exhibit an excellent discharge capacity with a superior cycling stability. The reversible capacity of the proposed Co/MnO-LC@C composite can be as high as 710 mA h g −1 at 1 A g −1 over 900 cycles. In addition, the composite can retain a remarkable specific capacity of 200 mA h g −1 with zero capacity decay over 3500 cycles at 10 A g −1 . The notably improved electrochemical performance is attributed to the rich pore structure, carbon skeleton structure, high specific surface area along with active materials with low crystallinity, leading to the alleviated volume expansion and facilitated lithium-ion transport characteristics. This work is expected to provide an innovative aspect for developing advanced anodes for LIBs.
✓ 已验证
产品关联
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.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Lixia Wang,Jia Huang,Xinran Hu,Zhiyang Huang,Mingcheng Gao,Di Yao,Tayirjan Taylor Isimjan,Xiulin Yang
The pursuit of efficient and economically viable catalysts for liquid/solid-state zinc-air batteries (ZABs) is of paramount importance yet presents formidable challenge. Herein, we synthesized a vacancy-rich cobalt/manganese oxide catalyst (Co/MnO@NC) stabilized on a nitrogen-doped mesoporous carbon (NC) nanosphere matrix by leveraging hydrothermal and high-temperature pyrolysis strategy. The optimized Co/MnO@NC demonstrates fast reaction kinetics and large limiting current densities comparable to commercial Pt/C in alkaline electrolyte for oxygen reduction reaction (ORR). Moreover, the Co/MnO@NC serves as an incredible cathode material for both liquid and flexible solid-state ZABs, delivering impressive peak power densities of 217.7 and 63.3 mW cm −2 and robust long-term stability (459 h), outperforming the state-of-the-art Pt/C and majority of the currently reported catalysts. Research indicates that the superior performance of the Co/MnO@NC catalyst primarily stems from the synergy between the heightened electrical conductivity of metallic Co and the regulatory capacity of MnO on adsorbed oxygen intermediates. In addition, the abundance of vacancies regulates the electronic configuration, and superhydrophilicity facilitates efficient electrolyte diffusion, thereby effectively ensuring optimal contact between the active site and reactants. Besides, the coexisting NC layer avoids the shedding of active sites, resulting in high stability. This work provides a viable approach for designing and advancing high-performance liquid/solid-state ZABs, highlighting the great potential of energy storage technology.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2021
·
IF 5.816
Kun Liu,Chaoyang Shi,Juan Yu,Enze Zhu,Zhimin Li,Chengxu Zhang,Wei Li,Xikun Yang,Yingjie Zhang,Mingli Xu
Transition metal-based compounds, due to their excellent ORR catalytic performance under alkaline condition, have recently emerged as one of the most promising alternatives to noble metal-based ORR catalysts. It is worth noting that manganese oxide can take an unique advantage for decomposition of intermediate adsorption products H 2 O 2 and can effectively reduce O 2 to OH − . However, most research has focused on MnO 2 , while attention has rarely been paid to MnO catalysts. In addition, under high-temperature pyrolysis condition, MnO is the most stable manganese oxide but MnO nanoparticles easily agglomerate. Hence, it is very difficult to obtain well-dispersed and small-sized MnO nanoparticles. Herein, on the basis of pre-synthesizing uniformly distributed manganese complexes on the reduced graphene oxide (rGO), we innovatively prepare highly dispersed and small-sized MnO nanoparticles (~3.94 nm) via high-temperature pyrolysis, which are uniformly anchored on N-doped reduced graphene oxide (NrGO) as an efficient oxygen reduction electrocatalyst . The as-obtained MnO/NrGO (1050 °C) electrocatalyst achieves satisfactory onset potential (0.942 V) and half-wave potential (0.820 V) under alkaline condition. And the limiting current density is 4.17 mA cm −2 , which is very close to that of Pt/C (20 wt%, JM). Meanwhile, MnO/NrGO (1050 °C) catalyst presents superior longstanding durability and methanol resistance than Pt/C (JM). This work indicates that high-temperature pyrolysis can improve the purity of manganese oxide, simultaneously the defects of NrGO can reduce particle size of MnO nanoparticles, which are greatly beneficial to improve ORR performance. This work provides a new idea for research of MnO catalysts for ORR in the future.
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Yixuan Wen,Qingsheng Li,Yuxiang Yang,Wei Zhou,Xingao Dong,Shuo Zhang,Liqiang Zhang,Tongde Shen,Peng Jia,Yuqing Qiao
Lithium hydroxide (LiOH) as a discharge product with high conductivity and low overpotential in lithium-oxygen batteries (Li O 2 batteries) has received extensive attention. However, the incomplete decomposition of LiOH during the charge process remains a critical issue hindering the practical application of high-performance Li O 2 batteries. Developing suitable cathode catalysts is essential to address this challenge. Here, we constructed an Ag-regulated MnO cathode catalyst with disordered structure to promote LiOH decomposition, thereby improving the electrochemical performance. The introduction of Ag breaks the long-range ordered structure of MnO. Compared to that of MnO, the d-band center of Ag/MnO shifts downward from the Fermi level. This weakens the strong adsorption strength between the cathode and oxygen-containing intermediates, resulting in more moderate adsorption energy of these intermediates on the cathode surface, which facilitates the complete decomposition of discharge product. Additionally, the active sites of the Ag/MnO cathode remained stable, with LiOH decomposed completely. This work provides new insights into the development of efficient LiOH-decomposing cathode catalysts for Li O 2 batteries.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Zhenji Zhou,Miaomiao Zhang,Shaoyun Huang,Zhong Li,Xiaoqing Guan,Yafeng Deng
Compared to traditional magnetic wave-absorbing materials, paramagnetic electromagnetic wave-absorbing materials have garnered significant attention in microwave absorption due to their advantages, including low density, wide bandwidth, and thin structure. The polarization mechanism and dielectric loss are key factors determining the electromagnetic absorption performance of these materials. In this study, BaTiO₃@MnO₂/MWCNTs (BTMC) hybrid composites were prepared using a two-step solvothermal method, and the electromagnetic absorption performance was optimized by adjusting the MWCNTs loading in the absorber and the absorber-to-paraffin ratio. The synergistic effect of BaTiO₃'s excellent dielectric properties, the anisotropy of MnO₂ with different morphologies (urchin-like α-MnO₂ nanosheets and rod-like β-MnO₂), and the high conductivity of MWCNTs enhanced the electromagnetic absorption capacity of the BTMC hybrid composite. The study showed that when the paraffin wax-to-absorber ratio was 7:3 and the MWCNT loading in the absorber was 10 wt%, the composite material (BTMC-10) achieved a reflection loss (RL min ) of −74.06 dB and an effective absorption bandwidth of 1.27 GHz at a thickness of 4.75 mm. This provides a new research direction for developing high-performance, lightweight, broadband, and efficient paramagnetic electromagnetic wave-absorbing materials, demonstrating their potential applications in the microwave field.
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Rui Gan,Lijuan Huang,Wenxuan Shao,Rongling Wang,Yuxuan Ye,Xuanyuan Pei,Qiang Li,Wen Liu,Yuwei Deng,Fei Pan
This study investigates microenvironment-engineered Mn-CNF catalysts with tailored active sites to boost oxidant utilization in Fenton-like water purification. The catalyst was synthesized by in situ anchoring Mn sites onto the carbon framework, improving the electrical conductivity of the carbon fibers and coordination capacity for peroxydisulfate (PDS). The Mn-CNF/PDS system achieved a high degradation rate of target pollutants via electron transfer process (ETP), with 90.2 % TCH removal after 120 hours in continuous flow operation, while maintaining Mn leaching below 0.1 ppm. Theoretical calculations revealed a stronger adsorption energy for PDS on Mn-CNF (-7.35 eV) compared to MnO (-4.35 eV) and CNF (-4.24 eV), with the lowest Gibbs free energy for complex formation. The rapid ETP demonstrated high selectivity in the presence of competing ions and natural organic matter. This work provides a novel strategy for sustained, efficient water purification through microenvironmental engineering in Fenton-like catalysts.
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Yafeng Jin,Fangming Han,Didi Tong,Xinyue Song,Di Wang,Tao Wang,Xiangquan Qin,Na Chen,Xiaobo Li,Guangri Xu
High-performance electrode materials are crucial for electrochemical sensing of bioactive food compounds. We report an eco-friendly synthesis of coral-like cobalt/nitrogen-doped porous carbon (Co/N-PC) via hydrothermal-pyrolysis, integrated with MnO₂ to construct a Co/N-PC@MnO₂/GCE sensor for ultrasensitive luteolin (LU) detection. Synergy between the conductive Co/N-PC framework (electron transport) and MnO₂ nanoparticles (Mn 2+ /Mn 3+ /Mn 4+ catalysis) delivers exceptional performance: dual linear ranges (0.01–1 μM; 1–100 μM) and a record-low 4 nM detection limit. Kinetic studies confirm the apparent electron transfer number (n app = 4) arises from MnO₂ mediation. The sensor demonstrated high practicality in complex floral teas (honeysuckle, chrysanthemum), achieving 77.2–103.6 % recoveries. This work provides both a sensitive, green LU detection method and elucidates a MnO₂ catalytic cycle mechanism, revealing new insights into LU's electrochemical pathway.
✓ 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）