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.
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JOURNAL OF NANOBIOTECHNOLOGY
·
2026
·
IF 15
Zhao Haiting,Meng Li,Du Peng,Chen Yun,Gong Mengqi,Zan Bo,Chen Jiaxin,Zeng Mengting,Liao Yiwei
Glioblastoma (GBM) is a highly lethal brain tumor with limited treatment efficacy due to therapy resistance and the blood-brain barrier (BBB). Here, we developed tLyP-1-modified polyethylene glycol (PEG)-coated hollow catalase-mimicking MnO₂-based nanocarriers (HM@si-SLC16A1/TMZ-tLyP-1, tLyP-NPs) for the targeted co-delivery of temozolomide (TMZ) and SLC16A1 siRNA (si-SLC16A1). These nanoparticles generate oxygen through H₂O₂ decomposition, alleviating tumor hypoxia and enhancing MRI imaging via Mn²⁺ release. In vitro, tLyP-NPs exhibited high siRNA loading efficiency, pH-responsive drug release, and effective SLC16A1 silencing, leading to reduced glioma cell viability and enhanced apoptosis under both normoxic and hypoxic conditions. tLyP-1 modification facilitated BBB penetration and glioma targeting, as evidenced by increased cellular uptake in a BMEC–C6 glioma co-culture model. In an orthotopic GBM rat model, the nanoparticles demonstrated superior tumor accumulation, prolonged T1-weighted MRI contrast, and enhanced therapeutic efficacy compared to non-modified formulations. Mechanistically, SLC16A1 silencing induced intracellular lactate accumulation, suppressed lactate-stimulated HCAR1/PI3K/AKT signaling, and promoted apoptosis in both in vitro and in vivo models. Histological analysis showed extensive tumor necrosis, increased apoptosis (Caspase-3, TUNEL), reduced proliferation (Ki67), and alleviated hypoxia (HIF-1α). Survival analysis revealed significantly prolonged survival without systemic toxicity. Collectively, tLyP-NPs represent a promising multifunctional nanoplatform that integrates BBB penetration, TME-responsive drug release, and synergistic chemo-gene therapy for GBM treatment. Graphical abstract
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高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2022
·Vol. 58
·期 1
·211-229
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IF 4.682
Wang Chenxu,Ding Jiawei,Gong Chuangchuang,Chen Tong,Zhang Yijing,Song Kai,Shi Chunsheng,He Fang
In order to tackle the electromagnetic pollution caused by the application of electromagnetic wave (EMW) in wireless communication, military industry, and other fields, broadband EMW absorption materials are urgently needed. To achieve this goal, emerging methods resort to constructing multivariate synergistic composites with unique morphology to enhance EMW absorption through diverse loss mechanisms and prominent structural advantage. Herein, a spatially tuned confinement pyrolysis strategy is proposed to design pomegranate-like MnO@NC absorption material. Unique hierarchical structure and more scattering sites are accessed via well-designed one-shell multiple cores nanostructure. N-doped carbon acts as an interwoven conductive network and restricts the movement of EMW in the shell, while nano-MnO acts as an impedance matching phase and interferes with the continuity of EMW. Moreover, the intercalation of dispersed MnO also amplifies the contribution of interfacial effect to EMW absorption, which can be verified by the calculation of the surface work function. The optimized composite possesses a maximum absorption bandwidth of 6.51 GHz at 2.4 mm and its maximum reflection loss reaches − 58.4 dB ( d = 2.3 mm). The synthesis of pomegranate-like composite provides a new direction for fabricating advanced carbonate-based EMW absorbers which are toward practical application. Graphical abstract
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Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Xiuqin Dong,Jianhang Tian,Junwei Lei,Yifei Chen
Copper as a non-noble metal catalyst has great prospects in the hydrogenation of acetic acid to ethanol. In this paper, Cu-MnO/SBA-15 catalysts with highly catalytic performance and stability were prepared. The mechanism was elucidated by experiments and DFT calculations . The Cu and MnO were coexistent on reduced x Cu y Mn/SBA-15. Appropriate Cu/Mn ratio was beneficial for increasing the Cu surface area and reducing the size of Cu. The rate-controlled step was found and the MnO could effectively lower the difficulty of acetaldehyde formation by dioxyethylidene. DFT calculations indicated that the formation of ethyl acetate at the Cu-MnO interface was largely prevented. The optimal catalytic hydrogenation activity was obtained for 9Cu1Mn/SBA-15, with the conversion of acetic acid and selectivity of ethanol of 99.9% and 90.1%, respectively. The catalytic activity could remain within 72 h which was more stable than the original Cu-based catalyst.
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INTERNATIONAL JOURNAL OF THERMOPHYSICS
·
2018
·Vol. 39
·期 5
·1-11
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IF 0.829
Fan Desong,Sun Si,Guo Li
A novel thermal control coating was presented based on the thermochromism of manganite. The pigment of K-doped manganite nanoparticles was dispersed into polymer matrix to prepare the coating with curing below 200 \(^{\circ }\) C. The nanoparticles size mainly distributes around 100–200 nm, and it shows a comparable stoichiometric ratio. The phase transition of the nanoparticles was observed from ferromagnetic metallic to paramagnetic insulator state. With increasing K doping level, the phase transition temperature increases, achieving controllable adjustment. Coating surface with and without pore defect was obtained by different polymer matrix. A sharp emittance variation was observed with increasing temperature in K-doped coating. The variation magnitude of emittance is up to 0.46, which is attractive to space thermal control. It is suggested that the pigment content of 50 wt% is sufficient to realize a large emittance variation.
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ChemElectroChem
·
2017
·Vol. 4
·期 10
·2500-2506
·
IF 4.136
Yao Du,Chun Liu,Shuijing Sun,Songping Wu
Graphical Harsh reality : A facile solution route to monodisperse MnO@3MnFe 2 O 4 @rGO is established. As anode materials of Li-ion batteries, MnO@3MnFe 2 O 4 @rGO delivers remarkable cycling performances. Therefore, MnO@3MnFe 2 O 4 @rGO nanocomposites can be considered promising battery materials that can be operated in harsh environments. A facile high-temperature solution route to a monodisperse core-shell structure of MnO (core) and MnFe 2 O 4 (shell) (abbreviated as MFO) nanoparticles anchored on reduced graphene oxide (rGO) has been established. Subsequently, MnO@MnFe 2 O 4 @rGO nanocomposites are utilized as advanced anode materials for high-performance Li-ion batteries. MnO@3MFO@rGO containing 22.5 wt% of the rGO composite (with a 1 : 3 molar ratio of MnO/MFO) as the electrodes delivered a remarkable cycling performance, that is, 587.8 mAh g −1 at a current density of 200 mA g −1 after 200 cycles at ambient temperature with an ultralow capacity fading (0.10 % per cycle). More importantly, the electrodes afforded excellent capacity stability under various operation temperatures (ca. −20 to 70 °C), such as an excellent reversible capacity of 1067 mA h g −1 at a current density of 500 mA g −1 after 300 cycles at 60 °C, and remarkable low-temperature performance of a reversible capacity of 208.7 mA h g −1 at a current density of 200 mA g −1 at −20 °C. Therefore, MnO@3MFO@rGO nanocomposites are considered as promising battery materials that can be operated in harsh environments.
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Small
·
2016
·Vol. 12
·期 40
·5564-5571
·
IF 8.315
Ming Zhong,Donghui Yang,Chenchao Xie,Zhang Zhang,Zhen Zhou,Xian-He Bu
Manganese oxides (MnO x ) are promising anode materials for lithium ion batteries, but they generally exhibit mediocre performances due to intrinsic low ionic conductivity, high polarization, and poor stability. Herein, yolk–shell nanorods comprising of nitrogen-doped carbon (N–C) coating on manganese monoxide (MnO) coupled with zinc manganate (ZnMn 2 O 4 ) nanoparticles are manufactured via one-step carbonization of α -MnO 2 /ZIF-8 precursors. When evaluated as anodes for lithium ion batteries, MnO@ZnMn 2 O 4 /N–C exhibits an reversible capacity of 803 mAh g −1 at 50 mA g −1 after 100 cycles, excellent cyclability with a capacity of 595 mAh g −1 at 1000 mAg −1 after 200 cycles, as well as better rate capability compared with those non-N–C shelled manganese oxides (MnO x ). The outstanding electrochemical performance is attributed to the unique yolk–shell nanorod structure, the coating effect of N–C and nanoscale size.
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高影响因子
Nanomaterials
·
2018
·Vol. 9
·期 1
·10
·
IF 3.504
Yuelong Xu,Bin Ren,Ran Wang,Lihui Zhang,Tifeng Jiao,Zhenfa Liu
In the present study, nanoscale rod-shaped manganese oxide (MnO) mixtures were successfully prepared from graphitic carbon nitride (C3N4) and potassium permanganate (KMnO4) through a hydrothermal method. The as-prepared MnO nanomixtures exhibited high activity in the adsorption and degradation of methylene blue (MB). The as-synthesized products were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), surface area analysis, X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). Furthermore, the effects of the dose of MnO nanomixtures, pH of the solution, initial concentration of MB, and the temperature of MB removal in dye adsorption and degradation experiments was investigated. The degradation mechanism of MB upon treatment with MnO nanomixtures and H2O2was studied and discussed. The results showed that a maximum adsorption capacity of 154 mg g−1was obtained for a 60 mg L−1MB solution at pH 9.0 and 25 °C, and the highest MB degradation ratio reached 99.8% under the following optimum conditions: 50 mL of MB solution (20 mg L−1) at room temperature and pH ≈ 8.0 with 7 mg of C, N-doped MnO and 0.5 mL of H2O2.Keywords:hydrothermal method;manganese oxide;adsorption;degradation;nanomixtures
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高影响因子
Journal of Environmental Chemical Engineering
·
2022
·
IF 7.968
Ting Yang,Yuqing Song,Yue Yang,Yihao Jing,Shisuo Fan,Qi Zhou,Yang Li,Wentao Li
Our work is mainly focused on the N-doped porous carbon nanosheets with metal or metal oxide catalysts embedded for the activation of peroxymonosulfate . MOF derived MnO/Fe 3 C encapsulated in N-doped carbon nanosheets (MnO/Fe 3 C@NC) with controlled structure have been synthesized and showed more excellent performance than traditional Fe/Mn-based catalyst as a PMS activator. Specifically, in this study, the magnetic MnO/Fe 3 C@NC-1 catalyst as peroxymonosulfate (PMS) activator was successfully fabricated by calcination of Mn and Fe-based bimetallic organic framework (MnFe-MOF-74), which was converted into mix-phased MnO and Fe 3 C. The system of PMS + MnO/Fe 3 C@NC-1 completely degraded 10 mg/L of bisphenol A (BPA) in less than 20 min. The MnO/Fe 3 C@NC-1 exhibited better activity in PMS activation than MnO@NC and Fe/Fe 3 C@NC, indicating that the synergistic effect between MnO and Fe 3 C could be beneficial to enhance the catalytic performance. The competitive radical quenching technique and electron paramagnetic resonance (EPR) measurements revealed that both SO 4 •− and • OH might be mainly generated. Various influential factors affecting catalytic performance were systematically investigated. The magnetic catalyst also manifested an excellent stable performance in heterogeneous BPA oxidation for several runs. We believe that this work will provide a new prospect for the synthesis of MOF-derived catalysts with high catalytic performance for PMS activation.
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高影响因子
MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Fan Shi,Yang Liu,Juntong Li,Zhijiao Song,Xue Li,Haiqiang Duan,Yongmei Luo,Qianying Wang,Chengjian Zhuang,Qing Liu,Baoli Wang
Salicylic acid (SA) plays a crucial role in inducing resistance in various plant species against pests, viruses, fungi, and bacterial pathogens. The dynamic changes in SA concentration can serve as real-time indicators of plant immune system activation, offering valuable biological markers for the early detection of diseases and pest infestations. This study develops an electrochemical sensor using MnO-anchored porous carbon (PC-MnO) derived from waste coffee peels for sensitive SA detection. The enhanced sensing mechanism relies on three key aspects: (1) The hierarchical porous carbon framework derived from coffee peels, in conjunction with the chemical activator and pore-forming agent Zn 2+ , facilitates efficient electron transfer and provides a high specific surface area; (2) Uniform MnO nanoparticles provide electrocatalytic sites that lower the oxidation overpotential of SA; (3) Strong interfacial coupling between carbon and MnO facilitates charge transfer kinetics. The optimized sensor shows a detection limit of 16.67 nmol/L and successfully quantifies SA in avocado leaves, revealing significantly elevated levels (96.82 μmol/L) in mite-infested leaves versus healthy controls (0.79 μmol/L). This work presents a sustainable sensing platform that supports early plant stress detection and advances smart agriculture.
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高影响因子
Nanomaterials
·
2020
·Vol. 10
·期 9
·1629
·
IF 4.324
Ranran Jiao,Li Zhao,Shuli Zhou,Yanjun Zhai,Denghu Wei,Suyuan Zeng,Xianxi Zhang
In this study, a simple method was adopted for the synthesis of MnO@C nanocomposites by combining in-situ reduction and carbonization of the Mn3O4precursor. The carbon content, which was controlled by altering the annealing time in the C2H2/Ar atmosphere, was proved to have great influences on the electrochemical performances of the samples. The relationships between the carbon contents and electrochemical performances of the samples were systematically investigated using the cyclic voltammetry (CV) as well as the electrochemical impedance spectroscopy (EIS) method. The results clearly indicated that the carbon content could influence the electrochemical performances of the samples by altering the Li+diffusion rate, electrical conductivity, polarization, and the electrochemical mechanism. When being used as the anode materials in lithium-ion batteries, the capacity retention rate of the resulting MnO@C after 300 cycles could reach 94% (593 mAh g−1, the specific energy of 182 mWh g−1) under a current density of 1.0 A g−1(1.32 C charge/discharge rate). Meanwhile, this method could be easily scaled up, making the rational design and large-scale application of MnO@C possible.Keywords:MnO@C nanocomposites;carbon content;current density;lithium-ion battery;transition metal oxide anode
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高影响因子
Journal of Materials Chemistry A
·
2017
·Vol. 5
·期 41
·21699-21708
·
IF 8.867
Zhe Cui,Qian Liu,Chaoting Xu,Rujia Zou,Jianhua Zhang,Wenlong Zhang,Guoqiang Guan,Junqing Hu,Yangang Sun
Herein, a simple and an environmentally friendly approach is developed to fabricate the novel MnO@C hierarchical structure, derived from Mn-based metal organic frameworks, which is explored as an anode material for lithium ion batteries. Remarkably, the MnO@C microsphere electrode delivers an outstanding, long cycling capacity of 596.3 mA h g−1 at 5C (1C = 765 mA g−1) after 1000 cycles, and an excellent rate performance of 380.1 mA h g−1 at 10C. The overall outstanding properties of the hierarchical MnO@C composite can be attributed to the success of a new strategy for dual structure design, which provides two pathways for effectively alleviating volume changes and enhancing conductivity based on in situ TEM electrochemical experiments and electrochemical impedance spectra. Both the poor conductivity and great volume changes of the MnO electrode material can be effectively improved in two ways: the porous carbon matrix confining the MnO nanoparticles, and the hierarchical nanorod-assembled architecture. The structures herein suggest new design concepts for metal oxide nanoarchitectures for high performance electrode materials in lithium ion batteries.
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