ACS Sustainable Chemistry & Engineering
·
2020
·
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
·
环境化学
·
材料科学
·
多相催化
·
能源与环境科学
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DOI
高影响因子
Nano-Micro Letters
·
2026
·Vol. 18
·期 1
·148
·
IF 36.3
Yang Zefang,Zhang Qi,Hu Chao,Tang Yougen,Li Jinchi,Wang Qi,Zhou Wanhai,Chao Dongliang,Wang Haiyan
A semisolid MnO 2 slurry electrode enables reversible MnO 2 deposition/dissolution within a CNT-percolated conductive network, achieving a high areal capacity of 60 mAh cm −2
The slurry system promotes the formation of highly conductive γ-MnO 2 and achieves uniform MnO 2 dissolution through enhanced charge transfer.
The MnO 2 slurry electrode offers strong scalability and regenerability, retaining 100% capacity after 180 cycles and reactivating inactive MnO 2 via percolation.
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DOI
PubMed
高影响因子
Ceramics-Switzerland
·
2026
·Vol. 9
·期 6
·62
·
IF 2.8
Wenhao He,Shaohua Su,Bijun Fang,Shuai Zhang,Xiaolong Lu,Jianning Ding
Lead-free [(Ba0.85Ca0.15)1−1.5xNdx][(Zr0.1Ti0.9)0.995Mn0.005]O3(x mol% Nd/Mn BCZT, x = 0.05, 0.1, 0.5, 1 mol%) ceramics were prepared by the traditional solid-state reaction method, in which the synergistic effects of sintering temperature and Nd/Mn co-doping on the phase structure, microstructural evolution, and electrical properties were systematically investigated. All ceramics exhibit a pure perovskite structure, with the tetragonal (P4mm) phase dominating at room temperature as confirmed by the X-ray diffraction Rietveld refinement. The sintering temperature (1475–1520 °C) is found to be the primary factor governing densification and grain growth, with the relative density peaking at 91.7% for the x = 0.5 mol% sample sintered at 1505 °C. Within this optimized processing window, increasing the Nd content induces a gradual migration of the Curie temperature (TC) toward lower temperatures, accompanied by enhanced relaxor behavior. A highlight of this work is the strategic balance between piezoelectric activity and mechanical quality factor through a “donor–acceptor” co-doping mechanism. Specifically, for the x = 0.5 mol% ceramics, an exceptionally high mechanical quality factor (Qm= 424.5) is achieved for samples sintered at 1490 °C, which is proposed to be associated with the temperature-modulated formation of
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高影响因子
Advanced Optical Materials
·
2026
·
IF 7.2
Zhou-Xiao Xiang,Zi-Long You,Jing-Hua Chen,Jun-Hua Wei,Zi-Lin He,Qing-Peng Peng,Tian-Chi Wang,Kong-Lan Chen,Dai-Bin Kuang
Organic-inorganic hybrid metal halide (OIMH) glass combines advantages such as low preparation temperature, high optical transparency, and abundant structural flexibility, making it a promising candidate for high-performance X-ray imaging. However, the recrystallization-induced devitrification hinders its long-term application. Therefore, developing OIMH glass with both high scintillation performance and excellent glass-forming ability remains an important challenge. In this work, we employ a synergistic Mn/Zn bimetallic engineering strategy to enhance the scintillation performance of Mn-based glass by increasing the Mn–Mn distance, improving X-ray absorption ability, and promoting optical transparency. The incorporation of a dimethylamine group onto the phosphonium cation endows (BDMAP) 2 Mn x Zn 1-x Br 4 (BDMAP = benzyl (4-(N, N-dimethylamino) phenyl) diphenylphosphonium) with high glass-transition temperatures (T g >87°C). The optimized (BDMAP) 2 Mn 0.3 Zn 0.7 Br 4 transparent luminescent OIMH glass shows a high light yield (LY) of 18 315 photons/MeV, a low limit of detection (LOD) of 85.05 nGy/s, and an outstanding spatial resolution of 20 lp/mm. Notably, (BDMAP) 2 Mn 0.3 Zn 0.7 Br 4 glass shows no crystallization even after heating at 100°C for 21 weeks, demonstrating strong resistance to recrystallization. This study presents a rational design route for regulating the scintillation performance of OIMH glasses with high stability.
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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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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Yongzhi Zhao,Gengchen Bai,Wenhe Yu,Jianfang Liu,Baorui Jia,Xuanhui Qu,Mingli Qin
The design of durable and efficient non-precious metal catalysts for the oxygen reduction reaction (ORR) is crucial for advancing fuel cell and metal–air battery technologies. Single-atom catalysts (SACs) have attracted significant attention owing to their high activity and atom utilization efficiency. However, conventional Fe–N–C SACs suffer from Fenton-related side reactions, while traditional carbon supports are susceptible to oxidative degradation under high potentials. Herein, we report a Mn single-atom catalyst (Mn–N–D) anchored on a partially graphitized sp 2 /sp 3 carbon support derived from low-cost industrial diamond. The partial transformation of the sp³ carbon surface into sp² carbon generates conductive domains that stabilize atomically dispersed Mn–N 4 moieties. The optimized Mn–N–D catalyst exhibits enhanced alkaline ORR performance, delivering a half-wave potential of 0.831 V vs. RHE. Experimental and density functional theory (DFT) analyses reveal the pyridinic-N-coordinated Mn–N 4 configuration serves as the primary active site, facilitating O–O bond cleavage and promoting the four-electron reaction pathway. This work provides a cost-effective strategy for constructing high-performance SACs through the synergistic integration of robust sp 3 carbon with conductive sp 2 carbon domains.
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高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Jingbo Wang,Yingzhe Bao,Xiulan Ma,Shan Jiang,Ziyue Zhou,Bo Wang
Norfloxacin (NOR) is widely used in aquaculture; however, its overuse has been shown to cause water pollution. In this research, NOR was chosen as the target pollutant, and agricultural waste, specifically corn cobs, was used to prepare ferromagnetic iron-manganese composite modified biochar (FMBC) for adsorbing NOR from aquaculture wastewater. The adsorption mechanism was explored using various characterization techniques and evaluating the adsorption performance. The results indicate that the optimal modification conditions for FMBC include an iron source concentration of 0.3 M, the iron-manganese ratio is 3:1, with a calcination temperature of 350°C. At pH 6, FMBC achieved an adsorption capacity of 31.17 mg/g for NOR, which is approximately 85.5% and 49.14% higher than that of pristine biochar (BC) and iron-modified biochar (FBC), respectively. The adsorption process obeyed pseudo-second order kinetics and the Langmuir isotherm model. As the temperature increased, the adsorption capacity of FMBC for NOR decreased. The adsorption capacity of FMBC for NOR increased at low concentrations of Cu 2+ (maximum 25 mg/L), but at higher concentrations, it was inhibited. FMBC demonstrated the capacity to maintain NOR removal performance at a rate of greater than 50% following five cycles. The adsorption processes of FMBC for NOR are driven by several factors: pore filling, electrostatic adsorption, hydrogen bonding, surface complexation, π-π interactions, and hydrophobic bonding. In summary,this novel composite material offers promising prospects for mitigating water pollution in aquaculture, making it a cost-effective and sustainable alternative.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2026
·
IF 6.7
Jiaxin Li,Hao Li,Yue Wang,Qingna Li,Zhiping Wang,Li-Qian Cheng
Electrocaloric (EC) refrigeration offers a promising alternative to conventional vapor-compression systems by eliminating greenhouse‑gas refrigerants and achieving high efficiency through reversible polarization switching. In this work, Ba 0.9 Sr 0.1 Ti 0.9 Zr 0.1 O 3 – x wt% MnO 2 ( x = 0–0.4) (BSZT) ceramics were prepared by the solid‑state sintering method to investigate the effects of MnO 2 doping on the phase structure, microstructure, ferroelectric properties, and EC performance. During the sintering process, MnO 2 doping not only provides a sintering‑aid effect, but also generates oxygen vacancies ( V O •• ) due to the substitution of Mn 3+ /Mn 2+ for Ti 4+ . As a result, the defect dipoles Mn 3+ /Mn 2+ - V O •• , together with the sintering‑aid effect, promote grain growth. Mn 3+ /Mn 2+ were further suggested to occupy the B sites and increase the cation disorder, which tailors the relaxor behavior and electrical properties. As a result, the maximum polarization ( P max ) under 60 kV/cm increases from 18.2 μC/cm² to 20.2 μC/cm² at a MnO 2 content of 0.3 wt%. An adiabatic temperature change Δ T max of 1.41 K was achieved at 60 kV/cm. However, excessive MnO 2 doping suppresses grain growth and deteriorates the ferroelectric and EC properties. Therefore, the appropriate introduction of MnO 2 into BSZT is an effective strategy for enhancing EC performance.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Liying Xian,Min Li,Daping Qiu,Chuang Qiu,Cheng Yue,Feng Wang,Ru Yang
Layered P-type structures are integral to most competitive cathodes for sodium-ion batteries (SIBs). However, the performance of P2-type cobalt-based layered materials is unsatisfactory owing to a low initial discharge capacity caused by Na deficiency. Here, Mn-doped Na x CoO 2 with a P3 structure is synthesized by using a modified solvent-thermal method with calcination . A structural analysis shows that partial Mn doping can effectively control P3 phase formation and increase d -layer spacing, thereby improving the diffusion of Na + . In addition, enhanced electrochemical performance is observed in optimized P3-type Na 0.26 Co 0.48 Mn 0.52 O 2 (NCMO-1), which exhibits a reversible specific capacity of 64 mAh g −1 at 3 A g −1 and a good capacity retention of 58% after 500 cycles. Furthermore, the Na-ion full cell constructed with an NCMO-1 cathode and a hard carbon anode yields a competitive energy density of 175.9 Wh kg −1 at 0.4 A g −1 with excellent cycle stability. Thus, this work provides a new viewpoint on the development of P3 structural materials with higher electrochemical performance for SIBs.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机化学
·
固态化学
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DOI
高影响因子
OPTICAL MATERIALS
·
2020
·
IF 2.779
Guonan Cui,Yanchun Yang,Ruilan Chen,Chengjun Zhu
Cations substitutions are known to make much significant contribution on achieving the high-quality kesterite Cu 2 ZnSn(S,Se) 4 thin films . And the optimal ratios of Mn, Ni and Co substitutions are reported to be ~0.05, belong to the low doping to reduce their defect density , which looks like to some extent the effect of Na doping. In this study, learning the research experience of alkali metal doping, we introduced the extra trace Mn 2+ ion into the precursor solution without affecting the compositions of other elements (i.e. Cu, Zn, and Sn), and the effect of trace addition on properties of the absorber layer was also studied. It was discovered that crystalline, electrical properties, and hole carrier concentration of Cu 2 ZnSn(S,Se) 4 thin films increased with an increase of Mn incorporation, and the best doping ratio of Mn/(Cu + Zn + Sn) was considered to be 0.03. In addition, the effect of extra trace Mn-doping on the film thickness and elemental compositions of Cu 2 ZnSn(S,Se) 4 absorber layer were studied in detail.
研究领域:
材料科学
·
半导体物理
·
薄膜制备
·
光伏材料
·
固体化学
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2023
·
IF 5.2
Yihang Qian,Yuan Chen,Guowei Yang
Manganese-contained Prussian blue analogues (Mn-PBAs) have a rigid and open 3D framework and adjustable redox potential , coupled with nontoxic nature, they could be effectively applied in various medicinal and biomedical fields. In this study, we reported the nanozyme activity of Mn-PBA nanoparticles . It was found that Mn-PBA nanoparticles possess peroxidase (POD)-, urate oxidase (UOD)- and catalase (CAT)-like enzymes, and this multi-enzyme activity is pH-switchable. The working mechanism of Mn-PBA nanoparticles mimicking peroxidase to oxidize 3,3′,5,5′-tetramethylbenzidine (TMB) in the presence of hydrogen peroxide (H 2 O 2 ) was pursued. In this process, Mn-PBA nanoparticles accelerate the decomposition of H 2 O 2 into •OH, so that •OH catalyzes the oxidation of TMB. Based on the color reaction and the cascade reaction , we constructed a platform that utilizes Mn-PBA nanoparticles to detect alcohol concentration. This platform has a wide detection range and high detection accuracy, as well as excellent detection specificity. For example, 25 μM-2.5 mM concentration of alcohol can be measured accurately with a good linearity overall, and the limit of detection of the alcohol concentration can reach low to 3.17 μM. These studies prove that the application of Mn-PBA nanoparticles in biomedicine and detection has bright prospects.
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DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Qinghua Feng,Gang Wang,Liuheng Xue,Yingsha Wang,Meili Liu,Jia Liu,Shouting Zhang,Wenping Hu
Compared with natural enzymes, nanozymes have advantages such as high stability, low cost, and a broad application prospect. However, due to the low catalytic activity of conventional nanozymes, synthesizing nanozymes with excellent enzyme-like activity will be long-term work. Herein, we synthesized single-atom nanozymes centered on Mn with N, P, and S doped (Mn-SAzyme) with enhanced peroxidase-like (POD-like) activity. We found that the presence of the Mn metal center significantly increased the POD-like activity of the nanozyme, exhibiting catalytic properties consistent with Michaelis–Menten kinetics. The POD-like activity was measured to be 17.48 U/mg, which was higher than that of the sample without the metal center. Using methylene blue (MB) as the organic dye model, the degradation efficiency of Mn-SAzyme could reach 90.1% within 300 min at pH 6.5, within the H2O2 concentration of 0.1 M and 25 mg/L of nanozyme dosage. Free radical quenching experiments and electron paramagnetic resonance tests showed that •O2– and •OH were the key to degrading organic dyes. This work aims to explore more methods for synthesizing highly active nanozymes and successfully applying the synthesized nanozymes to the degradation of organic dyes.
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DOI
高影响因子
危险品化学品经营许可证（带存储）