JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Dewei Liu,Qijie Zhang,Saipeng Ding,Fufeng Yan,Haiyang Dai,Tao Li,Renzhong Xue,Jing Chen,Gaoshang Gong,Cui Shang,Xuezhen Zhai
A series of nano-V 1- x Mn x O 2 samples ( x = 0–0.035) were prepared by a simple solvothermal method. XRD patterns and the Rietveld refinement results of V 1- x Mn x O 2 samples showed that Mn ions were incorporated into the V sites during the solvothermal process. XPS results indicated that the valence state of Mn ion was a mixed state of Mn 2+ , Mn 3+ and Mn 4+ . The corresponding relationship between the diameter, specific surface area and electrochemical performances of V 1- x Mn x O 2 nanorods was studied. It can be found that Mn doping promoted the insertion of K + ions into the electrode material and improved the conductivity, discharge capacity and cycle stability, which was due to more defects induced by Mn doping. The x = 0.020 sample had the largest specific capacitance (the 88% capacity retention rate after 550 cycles at 0.1 A·g −1 ) due to the improvement of structural stability by Mn-ion doping. These results provide great potential applications for nano-VO 2 (B) in the cathode material of lithium-ion battery and supercapacitor .
研究领域:
材料科学
·
电化学
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JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2026
·Vol. 46
·期 16
·118645
·
IF 6.3
Yuzhe Xie,Jie Zhang,Yuting Liu,Xing Luo,Zixiang Pei,Baohua Cao,Konrad Świerczek,Yang Zhang,Wanbing Guan
To mitigate interconnect corrosion in seawater-fed solid oxide electrolysis cells (SOECs), Mn 1.5 Co 1.5 O 4 spinel coatings were deposited on Fe-22Cr stainless steel. At 750 °C, the coated interconnects exhibited an area-specific resistance (ASR) of 31.8 mΩ cm 2 after 4835 h of oxidation in air, with a parabolic rate constant of 3.0 × 10 −5 mg 2 cm −4 h −1 . Following exposure to seawater vapor for 500 h, the ASR reached 3.36 mΩ cm 2 , with a predicted value of 9.80 mΩ cm 2 at 5000 h. These findings underscore the coating’s improved oxidation resistance under dual-atmosphere conditions. Furthermore, a three-cells stack demonstrated high stability with a low degradation rate of 1.04 × 10 −5 h −1 at 100 mA cm −2 for 100 h. Post-test analysis confirmed a crack-free structure with negligible additional resistance, indicating that the spinel coating satisfies the engineering requirements for durable, direct seawater electrolysis and provides a scalable pathway for green hydrogen production.
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Nanomaterials
·
2026
·Vol. 16
·期 7
·443
·
IF 4.8
Faxue Ma,Xiangju Wu,Zhen Ma,Jingjing Lu,Xueqing Zhu,Yuguang Lv
Owing to the high stability and low cost of nanozymes, they have been extensively investigated and reported. In this work, highly active CeO2nanoflowers were first prepared and then different metal elements were doped into the CeO2nanoflower matrix via a novel synthesis method to fabricate M-CeO2(M = Cu, Fe, Co, Mn, La) nanomaterials. Mn-CeO2with the highest peroxidase-like activity was selected via systematic screening, the as-prepared Mn-CeO2nanocomposites exhibited enhanced enzyme-like activity due to the strong metal-support interaction. This article explored the effects of doping ratio, pH, temperature, reaction time, and material concentration on its activity. A simple sensitive and selective colorimetric method was established and successfully used to detect hydrogen peroxide and ascorbic acid sensitively. When the hydrogen peroxide (H2O2) concentration is within the 2.0–120.0 μM range, the UV-visible absorbance at 652 nm was associated linearly with the H2O2concentration, R2= 0.9959, LOD = 1.7 μM (S/N = 3). The absorbance of the reaction system showed a good linear relationship with the ascorbic acid (AA) concentration (1.0–40.0 μM, R2= 0.992), LOD = 0.98 μM (S/N = 3). This study provides an effective way to construct efficient nanozymes and their potential applications in sensing and detection.
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PubMed
高影响因子
OPTICAL MATERIALS
·
2026
·
IF 4.3
Yijun Chen,Shichao Zhou,Ou Xu,Tao Huang,Wenchao Lin,Bin He,Xiaodong Shen,Guolun Zhang,Bingsuo Zou
Organic-inorganic metal halides (OIMHs) have garnered significant attention due to their rich optical properties and potential applications in light-emitting diodes, display devices, solar cells, and photodetectors. In this work, isopropyltriphenylphosphonium bromide and 1-methyl-1-propylpiperidinium bromide were employed as organic ligands and introduced into the [MnBr 4 ] 2- tetrahedral structure, synthesizing two manganese-based organic-inorganic metal halide single crystals: (C 21 H 22 P) 2 MnBr 4 and (C 9 H 20 N) 2 MnBr 4 , via the anti-solvent vapor diffusion method. Their nearest-neighbor Mn 2+ distances are 11.23 Å and 9.69 Å, which effectively modulates electron-phonon coupling and magnetic interactions, giving distinct green emissions centered at 509 nm and 534 nm under 284 nm and 362 nm excitation, with high photoluminescence quantum yields (93% and 86%) and long luminescence lifetimes (295 μs and 390 μs), respectively. The emission of (C 21 H 22 P) 2 MnBr 4 is dominated by self-trapped excitons (STEs) assisted by magnetic polaron effects, while (C 9 H 20 N) 2 MnBr 4 exhibits pure Mn 2+ d–d transition emission. Furthermore, based on the (C 21 H 22 P) 2 MnBr 4 single crystal, the corresponding amorphous material was prepared via a melting–rapid solidification method, which exhibits an emission peak redshift at 10 nm and a photoluminescence quantum yield of 50%. Through temperature-dependent photoluminescence spectroscopy and X-ray diffraction spectroscopy, the optical and structural properties of the three OIMH materials at low temperatures were systematically characterized, revealing the regulatory effects of magnetic polaron effect and different organic ligand confinement effects on the Mn luminescence, as well as the varied lattice symmetry tuning role of the same organic ligand order on the luminescence behavior.
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CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2026
·
IF 3.5
Xiaofu Li,Tingfeng Xue,Junliang Ma,Zhibo Liu,Zejia Song,Bingyan Zhu,Liwei Pan,Jing Zhang
A bimetallic Mn-Co@γ-Al 2 O 3 catalyst was prepared • The catalyst effectively activates PMS for the mineralization of CIP • The catalyst enhances PMS activation via electronic, structural and active-site synergy • 1 O 2 is synergistically generated by LAS, oxygen vacancies and bimetallic redox cycles Ciprofloxacin (CIP) is recalcitrant to complete degradation by conventional treatment methods, and persulfate-based advanced oxidation processes often suffer low activation efficiency. In this study, a bimetallic Mn-Co@γ-Al 2 O 3 catalyst was developed to activate peroxymonosulfate (PMS) for the efficient mineralization of CIP. Under optimal conditions (1 mmol·L -1 PMS, pH=9), CIP was completely mineralized within 60 min. The catalytic activity of the bimetallic catalyst surpassed that of the single-metal Mn@γ-Al 2 O 3 and Co@γ-Al 2 O 3 , with a synergistic factor ( SF =1.12, >1) confirming a strong Mn-Co synergy. This synergistic effect results from coupled redox cycles, the inhibition of manganese oxide aggregation, and the presence of abundant Lewis acid sites and oxygen vacancies. The PMS system, primarily governed by singlet oxygen ( 1 O 2 ), effectively reduced the biotoxicity of CIP wastewater, increasing the germination rate of fescue seeds from 80% to 92%. A total of 14 degradation intermediates were identified. The excellent mineralization performance is closely associated with the unique CIP degradation pathway driven by 1 O 2 .
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高影响因子
MATERIALS LETTERS
·
2026
·
IF 2.6
Sadegh Ghorbanzadeh,Wei Zhang
Mn-based antiperovskite nanoparticles hold promise for magnetic applications, but synthesis has been confined to high-temperature solid-state methods impeding nanoscale control. Here, a NaCl/KCl molten salt flux produces highly crystalline Mn 3 ZnC, Mn 3 AlC, and Mn 3 Zn(C,N) nanoparticles (10–30 nm) at 900 °C within 6 h. XRD and HRTEM confirm the cubic Pm̅3m symmetry and systematic lattice contraction upon nitrogen substitution. The compositions span a broad magnetic spectrum, Mn 3 ZnC is superparamagnetic (M s = 27.87 emu/g, H c = 1.4 Oe, T C = 120 °C), Mn 3 Zn(C,N) is soft ferromagnetic (21.88 emu/g, 69.3 Oe, T C = 142 °C), and Mn 3 AlC exhibits harder magnetic behavior (12.95 emu/g, 333.7 Oe). Under alternating magnetic fields, Mn 3 Zn(C,N) achieves a specific absorption rate of 15.10 W/g, showing that intermediate coercivity, tuned by interstitial nitrogen, optimizes hysteresis-loss heating in earth-abundant antiperovskites.
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JOURNAL OF LUMINESCENCE
·
2020
·
IF 3.28
Ronghua Ma,Xiaoyan Wei,Chunfeng Wang,Shaohui Mao,Bing Chen,Yonghong Shao,Yu Fu,Keyu Yan,Dengfeng Peng
Mechanoluminescenece (ML) is a dynamic luminescence phenomenon of materials under various mechanical stimulation. Impurity doped ZnS shows high ML repeatability without any needs for extra excitation sources, thus making it very promising in applications like stress sensing and battery-free new light source . Lots of progress has been made in the last decades, however, the reproducible ML (RML) mechanism is still unclear to explain some basic phenomena like how the electron is excited to conduction band when undergoing mechanical actions or how the excitation energy is transferred to the dopants so efficiently. Based on comparative study of photoluminescence (PL) and ML in Mn 2+ doped ZnS prepared via melt-salt method, the RML energy routes in sphalerite ZnS: Mn 2+ is proposed herein, and further, a general mechanism is supposed which could apply to other RML systems. The excitation of RML is possibly generated by electron transfer during bond rebuilding in plastic deformation while the highly efficient energy transfer is realized through hole and electron capture by the dopant. According to this mechanism, we provide some prospects for further optimization of RML performance as well as discovery of new RML materials.
研究领域:
材料科学
·
光学
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高影响因子
CATALYSIS COMMUNICATIONS
·
2019
·
IF 3.674
Haiyun Tong,Shuai Lin,Hanlu Zhang,Xin Wang,Yanan Huang,Bangchuan Zhao,Xuebin Zhu,Yuping Sun
The present work reports oxygen evolution reaction (OER) activity in metallic V 4 AlC 3 bulk powders prepared by solid-state reactions for the first time. An ultralow overpotential of 253 mV at the current density of 10 mA cm −2 and an excellent stability are observed, demonstrating that V 4 AlC 3 bulk powder can be used as an excellent new type of OER catalyst with low-cost for mass production.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
International Journal of Applied Ceramic Technology
·
2026
·Vol. 23
·期 1
·e70135
·
IF 2.3
Yihao Lin,Bingqing Yang,Cong Lin,Xiao Wu,Chunlin Zhao,Min Gao
The electric-field-modulated photoluminescence ( E -PL) performance of rare-earth-doped ferroelectric (FE) materials has been widely studied. However, the hysteresis effect in FE materials limits the tunability of E -PL modulation. Antiferroelectric (AFE) materials possess a reversible AFE-FE phase transition, inducing changes in crystal structure that can significantly affect the E -PL intensity. In this work, Sm/Mn-codoped silver niobate ceramics (ASMN x , x = 0, 0.5, 1, 1.5, 2) were fabricated via the tape-casting method, and the AFE properties, thermal stability, and E -PL performance were systematically investigated. The results show that the addition of Sm and Mn ions effectively inhibits the growth of grains and enhances the AFE properties. Upon irradiation at 480 nm, the samples exhibit a down-conversion PL effect, and the PL intensity increases with increasing Sm 3+ doping concentration. The in situ modulation of the PL intensity is reversibly achieved through the E -induced AFE-FE phase transition. Among them, ASMN1 shows the best tunability of −30.18% at 300 kV cm −1 . The excellent E -PL tunability in the lead-free ASMN x ceramics contributes to the broad applications in optical information storage, optical communication, and multifunctional optoelectronic devices.
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高影响因子
Advanced Physics Research
·
2022
·Vol. 2
·期 4
·2200071
·
IF 0
Weifan Niu,Ruidan Zhang,Zhibin Wang,Feng Huang,Daqin Chen
Perovskite nanocrystals (NCs) with intentionally introduced Mn 2+ /Yb 3+ activators enable tunable emissions covering UV-orange-NIR spectral range. However, the exact microscopic energy transfer mechanisms in this system remain unknown. Herein, Mn/Yb codoped CsPbCl 3 perovskite NCs with triple emissions originated from exciton recombination of host, 3d–3d transition of Mn 2+ and 4f–4f transition of Yb 3+ are prepared. Femtosecond resolution transient absorption spectra performed on the pristine CsPbCl 3 , Mn-doped, Yb-doped and Mn/Yb codoped samples clarify efficient and simultaneous energy transfer (ET) from excitons to Mn 2+ and Yb 3+ dopants. It is testified the sensitizations of dopants mainly result from the trapped hole, taking 285 ps for Mn 2+ and 17 ps for Yb 3+ respectively, which make less trapped hole recombine with de-localized carriers. Importantly, energy transfer processes from host to Mn 2+ and Yb 3+ activators emerge as competition, and the ET probability of exciton-to-Mn 2+ is higher than that of exciton-to-Yb 3+ . Finally, control experiments further prove that tunable Mn 2+ orange emission and Yb 3+ NIR emission are achievable via elaborate adjustment of the dopant concentrations.
研究领域:
材料科学
·
物理化学
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JOURNAL OF NONLINEAR OPTICAL PHYSICS & MATERIALS
·
2023
·
IF 2.7
Fuli Zhao,Junzi Li,Xiaodong Lin,Tingchao He
Phonon-assisted upconversion process is one of the important means to generate upconversion photoluminescence (UCPL), and has important applications in laser refrigeration and other fields. However, until now, the studies on UCPL behavior are still insufficient. Herein, this work synthesizes a series of Mn-doped two-dimensional hybrid metal halide (2D HMH) thin films and investigates their optical properties using various spectral techniques. Raman spectroscopic measurement confirms that Mn-doping is achieved via interstitial doping rather than Pb-substitution. By the measurement of the temperature-dependent PL spectrum, it is found that Mn-doping will weaken the thermal expansion effect of 2D HMHs, but will enhance the electron–phonon coupling strength. More importantly, both two-photon-excited and phonon-assisted UCPL are observed in Mn-doped 2D HMHs, with an extremely large phonon-assisted energy gain (approximately 500 meV). Our experimental results are of significance for designing phonon-assisted UCPL materials and expanding their applications.
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高影响因子
MATERIALS RESEARCH BULLETIN
·
2020
·
IF 4.019
Jian Yang,Xi Yuan,Lin Fan,Yuzhu Zheng,Fanshu Ma,Haibo Li,Jialong Zhao,Huilian Liu
Mn doped cesium lead halide perovskite nanocrystals (NCs) have potential application for white light emitting diodes. However, the emission of doped NCs is limited to trap-mediated energy transfer. The Mn doped CsPbCl 3 NCs with corporation of rubidium (Rb + ) ions (Mn:Cs 1-x Rb x PbCl 3 NCs, x = 0, 0.1, 0.2, 0.3, and 0.4) were synthesized. The effect of the optical and structural properties of Mn:Cs 1-x Rb x PbCl 3 NCs were studied by steady-state and time-resolved photoluminescence spectroscopy. The photoluminescence quantum yields and lifetimes of Mn doped CsPbCl 3 NCs with different Rb + contents were obtained. It was found that the Mn doped CsPbCl 3 NCs with Rb + content of 0.1 exhibited the highest Mn 2+ emission quantum yield up to 63.18%. Interestingly, the temperature-dependent PL spectra demonstrated the enhanced Mn 2+ emission of Mn doped CsPbCl 3 NCs at low temperature of 80 K. The experimental result indicated the Mn 2+ emission of Mn doped CsPbCl 3 NCs was enhanced by incorporating Rb + ions.
研究领域:
材料科学
·
光电子学
·
纳米技术
·
光物理
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高影响因子
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