ACS Nano
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2025
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IF 16
Yongwei Tang,Haoliang Liu,Xu Zhu,Mengting Liu,Wenjie Tang,Guang-Xu Wei,Yi-Hu Feng,Bing Xiao,Peng-Fei Wang
Mn-based layered oxides are regarded as a promising cathode candidate for potassium-ion batteries (PIBs) due to their high theoretical capacity and low cost. However, the cooperative Jahn–Teller distortion (CJTD) derived from six-coordinated high-spin Mn (III) (t2g3–eg1) centers is a serious issue that induces severe structural instability such as irreversible phase transformations, structural degradation, and Mn dissolution, thus deteriorating their cycling life during repeated charge and discharge processes. Herein, a P3-K0.4Li0.1Fe0.1Mn0.8O2 (KLFMO) cathode material is designed to regulate CJTD and corresponding electronic structures through quantifying occupancy in the dx2–y2 and dz2 orbitals of Mn. The synergistic incorporation of Li and Fe suppresses Mn (3d-eg*) orbital splitting, which contributes to restrained Jahn–Teller distortion of MnO6, enlarged K layer spacings, and contracted transition-metal slabs. Therefore, the detrimental phase transition from P3 to O3, local strain concentration, inhomogeneous surface structure reconstruction, and severe manganese dissolution are significantly alleviated due to the suppressed CJTD. Consequently, the target KLFMO cathode achieves a high capacity of 110.2 mA h g–1 at 0.2C and great cycling stability with 84.2% capacity retention after 150 cycles at 0.6C. Our findings provide an effective method to develop stable 3d transition-metal compounds free from the Jahn–Teller effect for advanced secondary batteries.
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高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Haoyu Gu,Shuo Wang,Siqing He,Xiang Su,Yule Yang,Hu Zhao,Chongpu Zhai,Shubao Shao,Minglong Xu
The practical application of ferroelectric shape memory ceramics in high-precision actuation systems faces dual constraints from limited strain memory combined with excessive overshoot. To address this challenge, through poling and aging treatments of MnO 2 -doped Pb 0.94 Sr 0.05 La 0.01 (Zr 0.54 Ti 0.46 )0 .9975 O 3 ceramics, we developed a material system demonstrating enhanced strain memory S m (0.38 %) and superior memory-overshoot ratio R mo (3.64). Mechanism investigations reveal oxygen vacancies' pivotal role in enhancing the ferroelectric shape memory effect. The directional arrangement defect dipoles formed by oxygen vacancies enhance asymmetric domain switching to amplify strain memory. Meanwhile, the local pinning effect of oxygen vacancies selectively limits non-memory strain and reduces overshoot. The optimized performance stems from the synergistic interplay of these complementary mechanisms. The proposed methodology establishes a generalizable framework for developing ferroelectric shape memory ceramics, paving the way for industrial-grade shape memory devices.
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Journal of Thermal Science
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2025
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IF 2.6
Yu Hao,Wang Weiran,Bian Zhiguo,Ma Xiaotong,Lu Xiao,Chang Long,Zhang Wan
The modification with dark metallic oxide is identified as the crucial strategy to enhance optical absorptions of calcium-based materials for the direct solar-driven thermochemical energy storage. The effect of modification on the heat release behavior in carbonation of calcium-based material has been widely investigated, but its effect on the heat storage behavior in calcination is lacking of sufficient research, typically for low-cost calcium resource such as carbide slag. The Fe-modified and Mn-modified carbide slags for CaCO 3 /CaO heat storage were synthesized and their optimum decomposition temperatures, effective heat storage conversions, heat flows and heat storage rates in endothermic stage were investigated. Although the Fe modification exacerbates the CaO sintering due to the formation of Ca 2 Fe 2 O 5 , that is still effective in reducing the regeneration temperature of CaO in CaCO 3 /CaO cycles. The Mn modification enhances significantly sintering resistance by forming the CaMnO 3 and its transformation into Ca 2 MnO 4 . The effective heat storage conversion of Mn-modified carbide slag after 30 cycles is 3.2 times as high as that of untreated carbide slag. Mn-modified carbide slag exhibits the lowest regeneration temperature and the highest heat storage rate after cycles. The loose and stable porous structure of Mn-modified carbide slag contributes to its superior endothermic performance. Therefore, Mn-modified carbide slag seems to be the potential candidate for calcium looping thermochemical heat storage.
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Journal of Advanced Research
·
2025
·
IF 13
Minyi Zhang,Qi Wang,Chen Li,Mengyao Chen,Chunhui Wang,Zikang Wang,Tao Xia,Chengqing Yi,Shuo Shi
Introduction Ion interference therapy has emerged as a promising new treatment for Osteosarcoma (OS). However, its efficacy is significantly restricted by inadequate hydrogen peroxide (H 2 O 2 ) under the complex tumor microenvironment (TME). Objectives This study aimed to supply sufficient H 2 O 2 to enhance tumor therapy efficacy and address the limitations associated with ion interference. Methods A hollow manganese dioxide (HMnO 2 ) nanoplatform loaded with calcium peroxide (CaO 2 ) (denoted as HMnO 2 @CaO 2 ) was evaluated for biosafety through hemolysis tests. The functionality of HMnO 2 @CaO 2 was further validated by quantitative real-time polymerase chain reaction (qRT-PCR) and cytometric analysis. Results Excessive Ca 2+ accumulation induces endoplasmic reticulum (ER) stress, enhances oxidative stress, and causes mitochondrial damage. Notably, Mn 2+ facilitates treatment monitoring through magnetic resonance imaging (MRI). Additionally, Mn 2+ -induced ferroptosis triggers an immune response that promotes the polarization of tumor-associated macrophages (TAMs), transforming the pro-tumoral M2 phenotype into the tumoricidal M1 phenotype, thereby enhancing the efficacy of immunotherapy. Conclusion In conclusion, HMnO 2 @CaO 2 nanoplatform enhances tumor therapy efficacy by overcoming ferroptosis limitations, inducing Ca 2+ overload, and boosting anti-tumor immunity. This strategy offers a promising approach to ion interference in the clinical translation of nanomedicines. Furthermore, it marks a significant advancement in osteosarcoma (OS) treatment and underscores the transformative potential of nanotechnology in medicine.
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ACS Applied Materials & Interfaces
·
2026
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IF 7.8
Renjie Liu,Yongjun Zhang,Zhenli Zhang,Hongjing Han,Haiying Wang,Yuting Guan,Yanan Zhang,Bolong Jiang,Xuzhong Gong,Enhao Sun,Yanguang Chen
Coke deposition is a key obstructive problem to be solved in the production of ethylene via steam cracking; moreover, the removal of graphitic carbon in coke is particularly difficult. A strategy integrating Fe–Mn bimetallic synergy at the B-site with oxygen vacancy engineering in perovskites was proposed to accelerate the catalytic conversion of coke/graphitic carbon via steam. DFT simulations and experimental results revealed that Mn incorporation induces dynamic lattice reconstruction of SrFeO3, generating abundant oxygen vacancies that enhance oxygen ion mobility and H2O adsorption. The interaction between Fe and Mn atoms has been observed to narrow the band gap, strengthen the hybridization of the O-2p and Fe-3d orbitals, induce electron delocalization, regulate the transfer of electrons from surrounding atoms to the adsorbed oxygen species, and thus accelerate the desorption and activation of *OH and the transfer of *O2–, which provides the possible reaction pathway for the transformation of graphitic carbon into CO or CO2. At 900 °C, the conversion of graphitic carbon and coke with steam catalyzed by SrFe0.1Mn0.9O3 reached 60.61% and 99.87%, respectively. This study provides an active material that facilitates the in situ online decoking strategy for catalytic coatings on steam cracking furnace tubes along with theoretical insights into the underlying reaction mechanism.
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APPLIED SURFACE SCIENCE
·
2026
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IF 6.6
Jingzhao Lu,Yanfang Zhu,Zhen He,Jun Zhao,Bingxia Duan,Yanyan Lu,Zhiliang Li,Yapeng Zhou,Guizhu Wu
Antibiotic residues pose a serious threat to aquatic environment, underscoring the urgency of developing efficient and stable advanced oxidation technologies. While the activation process based on peroxymonosulfate (PMS) shows great promise, its efficacy is highly dependent on the performance of the catalyst. In this study, a novel Mn 3 O 4 -Mn 5 O 8 nanohybrid was successfully synthesized and its performance in activating PMS for the degradation of tetracycline (TC) was systematically evaluated. By constructing an electron-rich interface, the nanohybrid achieved optimized manganese valence distribution and efficient cycling, leading to significantly enhanced catalytic activity. In the PMS system, the Mn 3 O 4 -Mn 5 O 8 attained 99.4% TC removal within 30 min, with the reaction rate constant (0.150 min⁻ 1 ) significantly exceeding those of the Mn 3 O 4 (0.052 min⁻ 1 ) and Mn 5 O 8 (0.066 min⁻ 1 ) systems, while the manganese leaching rate (3.65%) was much lower than that of unstable Mn 3 O 4 (8.53%). Mechanistic investigations revealed that the outstanding performance originated from interface-driven manganese valence cycling and electron transfer, which synergistically regulated both radical (O 2 ⁻) and non-radical ( 1 O 2 ) pathways. Furthermore, the catalyst exhibited good anti-interference capability in complex water matrices and cycling stability. This work provided a novel design principle centered on interface engineering and valence state synergy for developing high-performance manganese-based catalysts in PMS-driven water purification.
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高影响因子
MICROCHEMICAL JOURNAL
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2026
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IF 5.2
Shu-Yu Wang,Yin-Hong Niu,Fang-Di Hu
A ratiometric colorimetric sensing platform was developed for nitrite detection, featuring a trimetallic metal-framework (MOF) nanozyme (Mn/Ni/Fe-MOF) synthesized via a facile one-pot solvothermal method. Comprehensive characterization revealed its successful fabrication and superior structural properties. The rational design of the trimetallic system creates a synergistic electron transfer network, endowing it with significantly enhanced peroxidase-like activity that surpasses its mono- (Fe-MOF) and bimetallic counterparts (Mn/Fe -MOF and Ni/Fe -MOF). This advancement leads to a low detection limit of 1.39 μM and a wide linear range of 2.0–150 μM for nitrite sensing, improving the sensitivity of nanozyme-based colorimetric method. Leveraging this high activity, Mn/Ni/Fe-MOF catalyzed H 2 O 2 -mediated oxidation of colorless 3,3′,5,5′-tetramethylbenzidine (TMB) to blue product (oxTMB). Subsequently, a robust ratiometric platform (A 450 /A 652 ) was constructed based on a specific diazotization reaction between nitrite and oxTMB, which induced a distinct color change and an absorbance shift. Unlike single-signal assays prone to fluctuations, this internal reference mechanism automatically corrects for common interferences, ensuring high accuracy and reliability in complex matrices, as evidenced by excellent recoveries (97.9%–102.3%) in real samples (tap water and sausage). The entire system is characterized by remarkable simplicity: the nanozyme is synthesized via a facile one-pot method, and the detection requires only a single-step addition of nitrite to the pre-formed oxTMB system under mild acidic condition. This streamlined, “mix-and-detect” protocol avoids complex modifications, multi-step reactions, or sophisticated instruments, offering practical advantages for potential on-site application. This work presents a reliable, high-performance sensing strategy and highlights the great potential of multi-metal MOF nanozymes in designing advanced sensors.
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MICROCHIMICA ACTA
·
2026
·Vol. 193
·期 3
·134
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IF 5.4
Wu Jiayi,Li Chengwei,Zhao Jingwen,Liu Jiyang
A Mn-doped Fe 3 O 4 (Mn-Fe 3 O 4 ) nanozyme was synthesized using a one-step solvothermal method. Compared to pristine Fe 3 O 4 , Mn-Fe 3 O 4 exhibits unique oxidase (OXD)-like activity and enhanced peroxidase (POD)-like activity. The superior catalytic performance arises from the incorporated Mn species and the associated oxygen vacancies facilitate oxygen adsorption and activation, establishing an efficient self-cascade catalytic system. In this system, hydrogen peroxide (H 2 O 2 ) generated in-situ through OXD-like catalysis can trigger mimic-POD reactions. A dual-mode antioxidant detection platform was subsequently constructed using melatonin (MT) as a proof of concept, with 3,3’,5,5’-tetramethylbenzidine (TMB) serving as the substrate for the Mn-Fe 3 O 4 nanozyme. The colorimetric mode enables rapid visual screening by monitoring the oxidation of TMB to a blue-colored product, achieving a detection limit of 0.13 µM. The electrochemical mode features the novel utilization of mesoporous silica nanochannels for the selective enrichment of oxidized TMB (oxTMB), enabling highly sensitive quantification of MT with a detection limit as low as 0.6 nM. The assay applied to commercial tablets shows excellent recovery and reproducibility. This work combines engineered nanozymes with nanofilm-modified electrodes, offering an innovative approach for constructing advanced multimodal sensing systems. Graphical
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ACS Sustainable Chemistry & Engineering
·
2020
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IF 7.632
Enhui Wu,Xiaoshan Feng,Yingbin Zheng,Daifeng Lin,Yongjin Luo,Yufeng You,Baoquan Huang,Qingrong Qian,Qinghua Chen
Mn–Co–O catalysts with different Mn/Co molar ratios were synthesized by means of a facile inverse coprecipitation strategy and applied for the oxidation of propane (C3H8). The XRD pattern of Co2Mn1Oδ (molar ratio of Mn:Co = 1:2) indicates a Co3O4 phase, and most Mn incorporates into Co3O4 lattice to form a solid solution. Minor distributed Mn species occur structure reforming, totally converting to a stable Co–Mn solid solution during oxidation process. Meanwhile, Co2Mn1Oδ features a porous core–shell morphology, the core and shell of which are made up of Co–Mn solid solution, giving rise to a high surface area. The optimized synergistic effect of manganese and cobalt improves low temperature reducibility and produces rich surface active Co3+ species and surface-absorbed oxygen over Co2Mn1Oδ. As a result, it exhibits a prominent excellent catalytic activity, and delivers good thermal stability in the presence of 5 vol % H2O and 5 vol % CO2. In situ DRIFTs analysis displays the reaction path of C3H8 over Co2Mn1Oδ, where dominate intermediate species formate are easily decomposed into CO2. The synthesized porous core–shell Mn–Co–O can be a promising candidate replacing non-noble catalysts toward C3H8 oxidation at low temperature.
研究领域:
催化化学
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环境化学
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材料科学
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多相催化
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能源与环境科学
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高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Ziyu Chen,Junlin Wang,Yuhao Ruan,Jikang Cao,Huijun Jiang,Jiandong Jiang,Fan Wu,Shuilin Wu,Yuli Wang
Osteoradionecrosis of the jaw (ORNJ) causes debilitating complications, while current therapies risk tissue damage and vascular insufficiency. Herein, jaw vascular unit (JVU)-biomimetic nanozymes are developed by coating Mn/Ca diatomic sites nanozymes (Mn-CaDSN) with hybrid membranes (HM) from M2 macrophages and osteogenically induced human bone marrow mesenchymal stem cells (HBMSCs). Mn-CaDSN exhibited synergistic superoxide dismutase-like, catalase-like, and glutathione peroxidase (GPx)-like activities, and the maximized GPx-like catalytic activity of Mn-CaDSN ( V max = 0.69 m m ·min −1 ) is 2.1-fold higher than Mn single-atom controls ( V max = 0.33 m m ·min −1 ). Density functional theory calculations revealed that Ca sites optimized substrate adsorption and O─H bond cleavage via d-band center modulation. HM coating enabled targeted JVU delivery, enhancing cellular uptake and reprogramming irradiated macrophages toward M2 polarization (ARG-1 + cells increasing 3.8-fold) and osteogenic differentiation (ALP area uprising 4.2-fold). In irradiated cells, the nanozymes concurrently eliminated reactive oxygen/nitrogen species (RONS), activates mitophagy (mitochondrial-lysosomal colocalization colocalization uprising 50%), and suppresses cuproptosis (HSP70 decreasing 45%; intracellular Cu 2+ decreasing 30%). Loaded Dl-3-n-butylphthalide (NBP) further enhanced angiogenesis in vivo. In rat ORNJ models, NBP@Mn-CaDSN@HM promoted mucosal healing and increased bone volume fraction (BV/TV increasing 2.3-fold vs irradiated controls) by rebalancing immune-vascular-osteogenic microenvironments. This work establishes a paradigm of JVU biomimetics integrated with diatomic nanozymes for comprehensive ORNJ therapy.
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Journal of Energy Chemistry
·
2023
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IF 13.1
Yuan Qin,Chaozhong Guo,Zihao Ou,Chuanlan Xu,Qi Lan,Rong Jin,Yao Liu,Yingchun Niu,Quan Xu,Yujun Si,Honglin Li
Designing single-atom catalysts for oxygen reduction reaction (ORR) are fashionable but challenging to boost the zinc-air battery performance. Significantly enhanced ORR activity by manganese (Mn) single-atom catalysts can be achieved by accurately regulating the coordination number of isolated Mn atoms. Theoretical calculations indicate that the single Mn-N 5 sites possess lower free energy barrier and higher oxygen adsorption performance than single Mn-N 4 sites to accelerate the ORR kinetics. Target to it, here we synthesize an atomically dispersed Mn-N 5 catalyst by precisely axial coordination of pyridinic-N doped into two-dimensional (2D) porous nanocarbon sheets (∼3.56 nm thickness), which reveals outstanding catalytic activity and ultrahigh stability for the ORR in zinc-air battery owing to the inhomogeneous charge distribution of Mn-N 5 sites compared to the conventional single-site Mn-N 4 catalyst and Pt/C. This work gives a new strategy for in situ regulating the electronic structure of metal single-atoms and further promoting the overall ORR performance in energy systems.
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Journal of Food Measurement and Characterization
·
2022
·Vol. 17
·期 2
·1662-1670
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IF 3.006
Yang Zhengfei,Zhang Weijia,Zhu Jiangyu,Yin Yongqi,Xue Huaiguo,Fang Weiming
Detection and control of nitrite are major concerns in recent years for ensuring food and environmental safety. In this study, Mn, N co-doped Co-Carbons (CoMnN-Cs) were synthesized by calcination of bimetallic Co-Mn zeolite-imidazolate framework (CoMnZIF-67) materials at different temperatures (600–900 °C) in nitrogen atmosphere. Many characterizations, such as scanning electron microscope (SEM), elemental mapping, and, N 2 adsorption–desorption were performed to analyze the morphology, structure, and composition of the CoMnN-Cs. SEM revealed the generation of rich carbon nanotubes (CNTs). Mn-doping was obtained, which could be seen from the elemental mapping. The characterization also revealed that the pyrolysis temperature has an important effect to catalytic activities. From obtained results, it was found that the CoMnN-Cs prepared at 800 °C (CoMnN-Cs-800), showed better detection performance compared with CoMnN-Cs developed at other temperatures. As a result, the CoMnN-Cs-800-based sensor manifested an extended linear range (from 0.2 to 7000 μM), a low detection limit of 0.16 μM, and high sensitivity. Meanwhile, the developed sensor exhibited good selectivity, reproducibility, and long-term stability. Moreover, the sensor achieved satisfactory recoveries for the quantification of nitrite in tap water and sausage samples. This study implies CoMnN-Cs-800 is a promising material for the measurement of nitrite. Graphical abstract
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危险品化学品经营许可证（带存储）