INORGANIC CHEMISTRY
·
2024
·
IF 4.3
Donghui You,Kailei Li,Yuanyuan Chang,Ruiqin Wang,Rongxing He,Lei Zhou,Ming Li
Eco-friendly organic–inorganic hybrid metal halides (OIMHs) are widely recognized as promising candidates for next-generation semiconductor materials. However, achieving inherent moisture stability in OIMHs remains a significant challenge due to the highly hygroscopic nature of the halide structures. In response, a strategy to precisely modify the organic cation (18-ACE: 4,13-diaza-18-crown 6-ether) was developed by introducing hydrophobic benzyl groups into 18-ACE, forming a protective layer that enhances the moisture stability of the OIMHs. Specifically, benzyl groups were incorporated into 18-ACE to create 18-ACE-Bn, which was then used as an organic component to construct zero-dimensional Mn-based (18-ACE)MnBr4 and (18-ACE-Bn)MnBr4·H2O, exhibiting photoluminescence quantum yields (PLQYs) of 68.18% and 97.17%, respectively. Notably, (18-ACE-Bn)MnBr4·H2O demonstrates exceptional moisture stability compared to (18-ACE)MnBr4, retaining 97% of its initial PLQY even after 180 days of exposure to 70% relative humidity. Molecular dynamics and density functional theory calculations indicate that this superior stability is attributed to the terminal benzyl groups embedded within the inorganic framework, forming a compact structure with abundant weak interactions. Leveraging the unique spectral characteristics of (18-ACE-Bn)MnBr4·H2O, a high-performance WLED with a wide color gamut of 125.2% NTSC (National Television Standard Committee) was developed, highlighting its potential for backlight display applications.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Science
·
2024
·Vol. 11
·期 25
·2401515
·
IF 14.3
Ziyan Yang,Qingzhou Wang,Huixin Yu,Qing Xu,Yuanyue Li,Minghui Cao,Rajendra Dhakal,Yang Li,Zhao Yao
Self-powered pressure detection using smart wearable devices is the subject of intense research attention, which is intended to address the critical need for prolonged and uninterrupted operations. Current piezoelectric and triboelectric sensors well respond to dynamic stimuli while overlooking static stimuli. This study proposes a dual-response potentiometric pressure sensor that responds to both dynamic and static stimuli. The proposed sensor utilizes interdigital electrodes with MnO 2 /carbon/polyvinyl alcohol (PVA) as the cathode and conductive silver paste as the anode. The electrolyte layer incorporates a mixed hydrogel of PVA and phosphoric acid. The optimized interdigital electrodes and sandpaper-like microstructured surface of the hydrogel electrolyte contribute to enhanced performance by facilitating an increased contact area between the electrolyte and electrodes. The sensor features an open-circuit voltage of 0.927 V, a short-circuit current of 6 µA, a higher sensitivity of 14 mV/kPa, and outstanding cycling performance (>5000 cycles). It can accurately recognize letter writing and enable capacitor charging and LED lighting. Additionally, a data acquisition and display system employing the proposed sensor, which facilitates the monitoring of athletes’ rehabilitation training, and machine learning algorithms that effectively guide rehabilitation actions are presented. This study offers novel solutions for the future development of smart wearable devices.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
OPTICAL MATERIALS
·
2025
·
IF 4.2
Lan Fang,Dengfeng Luo,Jing Zhang,Fukang Wang,Jiayang Zhang,Zheheng Zheng,Zhiqun Xu,Guobin Huang
The commercial applications of lead halide perovskites are limited by their adverse environmental hazards and intrinsic instability. One promising strategy to mitigate the Pb 2+ content is the doping of X 2+ transition metal ions into cesium lead halide CsPbX 3 (where X = Cl, Br, I) perovskite nanocrystals (PNCs). In this study, an ultrafast high-power ultrasonic synthesis method is employed to ensure uniform nucleation and growth of co-doped (Zn, Mn): CsPbCl 3 PNCs. Various analytical techniques are utilized to investigate the phase purity, microstructure, chemical composition, and photo-luminescence properties of the co-doped PNCs. Density functional theory (DFT) calculations reveal that the significantly enhanced optical performance of co-doped (Zn, Mn): CsPbCl 3 PNCs is primarily due to the increased formation energy resulting from the successful incorporation of Zn 2+ into Mn-doped CsPbCl 3 PNCs, without introducing new defect states. Additionally, the co-doped (Zn, Mn): CsPbCl 3 PNCs exhibit high sensitivity and selectivity in detecting Cu 2+ ions. Our findings propose a novel approach for tuning the optical properties of co-doped (Zn, Mn): CsPbCl 3 PNCs, highlighting their potential for applications in fluorescence sensors.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Hong-Mei Fu,Xi-Peng Zhang,Shi-Chao Qi,Ding-Hua Liu
The p -chlorotoluene (PCT) and m -chlorotoluene (MCT) are indispensable chemical intermediates in pharmaceuticals, agrochemicals, and material synthesis. However, the similar physical and chemical properties of the PCT and MCT make their efficient separation a severe challenge in the current chemical separation field. In this study, a metal-organic framework named Mn-dhbq (dhbq = 2,5-dihydroxy-1,4-benzoquinone) is employed to achieve highly efficient separation of PCT/MCT in a solvent system with 1,3,5-trimethylbenzene. The Mn-dhbq exhibits the adsorption capacity of 208 mg/g for PCT and 72 mg/g for MCT at 25 °C, with initial concentration of 20 % for both PCT and MCT. Notably, the dual-site Langmuir-Freundlich selectivity is 38 with the concentration of 1 % for PCT and MCT. Density functional theory (DFT) calculations reveal differences in the amount of charge transfer and interaction sites between the framework and adsorbate, and these factors collectively contribute to the selective separation of PCT and MCT by Mn-dhbq.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2025
·
IF 6.2
Ning Lei,Mupeng Zheng,Xinyue Tang,Haowei Wang,Chaofeng Wu,Ke Wang,Yudong Hou
Highly effective piezoelectric hardening is crucial for high-power device applications. In this work, we introduce a novel piezoelectric hardening approach that synergistically combines oxygen vacancies with precipitates for achieving strong pinning of ferroelectric domain walls. In Mn-doped 0.2Pb(Zn 1/3 Nb 2/3 )O 3 -0.8Pb(Zr 0.5 Ti 0.5 )O 3 (Mn-doped PZN–PZT) ceramic, the substitution of Mn 3 + for Ti 4+ or Zr 4+ results in an acceptor doping hardening, whereas the substitution of Mn 2+ for Zn 2+ leads to the formation of ZnO precipitates, leading to a precipitation hardening. Highly effective piezoelectric hardening via oxygen vacancies and ZnO precipitates in 0.9 wt% MnCO 3 -doped PZN–PZT sample is realized, where the mechanical quality factor ( Q m ) and maximum vibration velocity ( v max ) represent 10 times and 1.2 times increase, compared to the undoped samples. Moreover, the synergistic strategy of integrating oxygen vacancies with ZnO precipitates can significantly enhance the stability of Q m , offering substantial potential for the design of high-power piezoelectric ceramics.
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Yaqi Wu,Jianhua Qian,Yanan Wang,Jinjuan Xing,Junhua Li,He Huang,Xueming Kang,Jiasheng Xu
Developing transition metal oxide-based catalysts with both high thermal stability and catalytic activity for the effective volatile organic compounds (VOCs) removal remains a major challenge in heterogeneous catalysis. In this work, a series of Cu, Mn, Co and Ni substituted Co 3 O 4 spinel catalysts with a large number of oxygen vacancies were produced as extremely stable and active substances for the oxidation of toluene. The CuCo 2 O 4 catalyst, prepared through transition metal substitution, demonstrated exceptional performance with T 50 , T 90 , and complete conversion temperatures of 204 °C, 220 °C, and 228 °C, respectively. Furthermore, the CuCo 2 O 4 catalyst displayed markedly enhanced thermal stability compared to other catalysts, which was crucial for practical implementation. Its superior catalytic activity originated from electron transfer between Co and Cu cations, facilitated by lattice oxygen, which increased the Co 3+ /Co 2+ ratio. This structural modification strengthened oxygen migration and reducibility within the spinel framework, facilitating efficient regeneration of lattice oxygen and rapid activation of adsorbed oxygen species. Kinetic analyses corroborated these findings, revealing that CuCo 2 O 4 possessed the lowest activation energy ( E a = 40.40 kJ/mol), thereby reducing the energy barrier for toluene oxidation. These results demonstrate that the CuCo 2 O 4 catalyst represents a promising candidate for practical applications, combining high catalytic activity for toluene oxidation with exceptional operational durability and thermal stability.
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Yi Chen,Xuedan Xie,Jiangtao Jing,Yonghua Wang,Danfeng Cui,Dan Liu,Chenyang Xue
The combination of pseudocapacitive electrodes with ionic liquid (IL) electrolytes demonstrates a significant synergistic effect in expanding the potential window of supercapacitors, thereby enhancing the energy density of the device. Mn 3 (HHTP) 2 , a metal-organic framework (MOF) with high-density redox-active sites and hierarchical porosity, serves as the electrode material paired with [EMIM][BF 4 ] and [EMIM][TFSI] IL electrolytes. The ion size in [EMIM][TFSI] can be precisely aligned with the electrode pore size, thereby reducing interfacial resistance and enhancing ion accessibility. Optimizing the [EMIM][TFSI]/acetonitrile mass ratio to 4:6 achieves superior electrolyte properties, including an ionic conductivity of 50.4 mS cm −1 and viscosity of 5.24 mPa·s. This design extends operating potential from 8 V to 13 V, increasing energy density to 108.0 Wh kg −1 , representing a 68.8 % improvement over baseline systems. The device retains 94.34 % capacitance after 2000 cycles at 8 V, with specific capacitances of 7.2 F g −1 at 8 V and 4.6 F g −1 at 13 V. These findings establish a new paradigm for interface engineering in high-voltage supercapacitors.
✓ 已验证
DOI
高影响因子
ACS Nano
·
2025
·
IF 16
Anqiang Jiang,Heng Guo,Shan Yu,Fengying Zhang,Xuan Zhang,Limin Xu,Yi Li,Chun Tang,Xin Tu,Ying Zhou
The electron transfer mechanism involving multiple trapping states has great implications for dictating the photoelectrochemical (PEC) hydrogen evolution reaction (HER). Uncovering the ultrafast dynamics of multiple trapping states in defect-rich catalysts to suppress undesirable Shockley–Read–Hall (SRH) recombination and boost electron extraction remains a crucial yet challenging task. Herein, we bypass defect-induced SRH recombination sites and redirect more excited electrons toward the HER by engineering an additional electron transfer channel within Ag–In–S quantum dots (AIS QDs) via Mn doping. Photoluminescence spectroscopic studies indicate effective charge carrier transfer from the band edge to the doping states, inducing a 5.3-fold enhancement in the electron transfer rate. Using ultrafast transient absorption spectroscopy, we reveal that host photoexcitation leads to subpicosecond electron transfer from the conduction band to the empty Mn2+ d-orbitals in Mn-doped QDs, and the resultant charge transfer state shortens the excited-state electron transfer lifetime from 3.73 to 1.19 ns, corresponding to a 300% acceleration of carrier depopulation and enhancing excited electron availability. Moreover, the evolution of the product composition indicates the improved interfacial utilization of holes, as the applied PEC bias relieves kinetic constraints on hole transfer. Consequently, a saturated photocurrent density of 8.6 mA cm–2 at 0.5 V vs RHE was achieved for the as-fabricated PEC device under one-sun irradiation, comparable to the latest bare heavy-metal-free QD-based PEC systems. These results underscore that modulating electron dynamics, previously dominated by intrinsic defects, through intermediate energy levels is a promising strategy to enable high-efficiency PEC solar energy conversion.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
·
2025
·
IF 3
Md Mostafezur Rahman,Shuai-Wen Ding,Mohanraj Kumar,Wei Zhang,Jih-Hsing Chang
Magnetic nanoparticles (MNPs) with temperature-dependent heating behavior offer a promising strategy for self-regulated magnetic induction hyperthermia (MIH) in cancer treatment. This study simulates the temperature-dependent heating performance of Al-doped Zn Mn ferrite nanoparticles (Zn 0.5 Mn 0.5 Al x Fe 2-x O 4 ) in a human liver tumor model, using experimentally validated parameters from previous characterization. The model evaluates in-tumor heating under physiological conditions, focusing on temperature rise, spatial uniformity, and thermal stability. The results confirm that MNPs with lower Curie temperatures (T C ) offer better temperature control, while higher-T C particles enable more efficient heating at reduced concentrations. Experimental validation using magnetic hydrogel phantoms demonstrated good agreement with simulation predictions, with temperature deviations within ±1.5 °C. These findings highlight the importance of incorporating temperature-dependent specific loss power (SLP) behavior for accurate modeling of hyperthermia outcomes and provide a practical framework for optimizing MNP selection and dosage for safe and effective treatment.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
·
2025
·
IF 2
Song Jianli,Li Yelong,Wang Weiqiang,Wang Linyue
Chromium volatilization and interfacial oxidation are critical challenges limiting the long-term high-temperature service of ferritic stainless steel (FSS) interconnects in solid oxide fuel cells (SOFCs). In this study, a dense (Co,Mn) 3 O 4 spinel coating was fabricated on E-brite FSS substrates via a composite electrodeposition–thermal conversion approach conducted at 800 °C. A homogeneous single-phase spinel was formed with a stable Cr 2 O 3 interlayer that suppressed chromium volatilization and surface degradation. Microstructural and elemental analyses confirmed the structural integrity. After 500 h of oxidation at 800 °C, the coating remained stable without cracking or spallation. The area-specific resistance (ASR) decreased to 7.9 mΩ·cm 2 , an 80.7% reduction compared with the uncoated alloy (41.0 mΩ·cm 2 ), demonstrating improved electrical conductivity under prolonged exposure. This study provides a practical strategy that uses composite electrodeposition and thermal conversion to enhance both oxidation resistance and electrical performance of ferritic interconnects for intermediate-temperature SOFC applications.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2025
·Vol. 172
·期 4
·040508
·
IF 3.3
Xiaola Li,Huihong Gong,Wenjie Huang,Wenzhao Huang,Ziyang Liang,Yuqing Liu,Boyang Zhang,Shuxing Wu,Chenyu Liu,Zhan Lin,Dong Luo
Li-rich Mn-based layered oxides (LLOs) are regarded as one of the most promising next-generation cathodes for lithium-ion batteries (LIBs) due to their ultra-high capacity and low cost. However, the redox behavior of oxygen under high voltage induces severe challenges, including voltage hysteresis and voltage decay, which have become major obstacles to their commercialization. This work optimizes the oxygen redox process of O2-type LLOs by regulating the Na content in P2-type Na-based intermediates. Experimental results demonstrate that samples prepared by intermediates with optimal Na content show higher reversibility and reduction potential of oxygen redox. Meanwhile, the migration and dissolution of transition metals in the optimized samples are effectively suppressed. Therefore, the optimized samples deliver an improved voltage stability and alleviated voltage hysteresis. This work suggests that the oxygen redox process can be regulated and provides a practical solution to mitigate voltage decay and hysteresis in LLOs.
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yue Yu,Feng Liu,Xuanzhi Liu,Longquan Li,Binhua Zhou,Hanxiao Liao,Pengfei Tan,Jun Pan
The inevitable electrochemical oxidation accompanied with continuous dissolution of Ru triggers structural distortion, causing insufficient catalytic activity and stability of Ru-based electrocatalysts in acidic oxygen evolution reaction (OER). In this work, we propose a Mn doping strategy to obtain Mn doped RuO 2 (Mn-RuO 2 ) for stabilizing the dynamic Ru. X-ray absorption spectroscopy and X-ray photoelectron spectroscopy results indicate that the doped Mn in RuO 2 preferentially replaces the oxidation of Ru by self-oxidation during the OER process, which significantly suppresses excessive dissolution of Ru. Furthermore, in-situ Raman spectroscopy, in-situ electrochemical impedance spectroscopy, the differential electrochemical mass spectrometry measurements combined with density functional theory calculations demonstrate that the Mn doping is able to strengthen the covalency of metal–oxygen bonds, facilitate lattice oxygen mechanism with elevated energy level of O 2p band. Therefore, Mn-RuO 2 catalyst demonstrates remarkable acidic OER performance, only needing an overpotential of 209 mV to achieve the current density of 10 mA cm –2 , 139 mV lower than that of commercial RuO 2 . And Mn-RuO 2 can maintain stable operation for over 180 h, which is about 18 times that of commercial RuO 2 . Notably, when Mn-RuO 2 is used as the anode, the proton exchange membrane water electrolyzers demonstrates stable operation for 40 h at 100 mA cm −2 . This work offers a strategy to alleviate stability issue of Ru-based catalysts for efficient acidic OER process.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）