JOURNAL OF ELECTRONIC MATERIALS
·
2024
·
IF 2.2
Ji Xiaoli,Chen Fan,Liu Jian,Ma Qianqian,Qiao Ruochen,Xu Zhihao
This study details microwave-absorbing materials made of multi-walled carbon nanotubes (MWCNTs) and silicon nitride (Si 3 N 4 ). The synthesis of MWCNTs/Si 3 N 4 nanocomposites (NCs) involves combining alkyne-functionalized multi-walled carbon nanotube (MWCNTs-ALK) nanoparticles (NPs) with azide-functionalized silicon nitride (Si 3 N 4 –N 3 ) NPs through a click reaction. In order to analyze the morphology and structure of the MWCNTs/Si 3 N 4 NCs, scanning electron microscopy, x-ray photoelectron spectroscopy, x-ray diffraction, and infrared analysis techniques are employed. The electromagnetic properties of the NCs are evaluated using a vector network analyzer. The results indicate when this feeding ratio of MWCNTs-ALK and Si 3 N 4 –N 3 was 1:2 and a matching thickness of 3.0 mm at 6.82 GHz, the minimum reflection loss reaches − 30.7 dB. Additionally, with a feeding ratio of 1:1 and a matching thickness of 1.5 mm, the bandwidth below − 10 dB ranges from 11.6 to 15.8 GHz. The compositions of MWCNTs/Si 3 N 4 synthesized by click reactions indicate that, compared to physical mixed samples, our material has superior wave-absorbing properties. This improvement can be attributed to the covalent bonding between MWCNTs and Si 3 N 4 facilitated by the click reaction, resulting in enhanced dielectric loss and impedance matching. The results of this study have significant implications for the processing of composite microwave-absorbing materials and offer novel insights into the design of multifunctional microwave-absorbing materials. Graphical
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高影响因子
JOURNAL OF POLYMER RESEARCH
·
2024
·Vol. 31
·期 12
·1-12
·
IF 2.6
Cui Yi-hua,Zhang Chen-ming,Lin Jian-feng,Lin Shi-ping
By free radical polymerizing methylacrylylethyl trimethyl ammonium chloride (DMC), styrene (ST), and methoxy polyethylene glycol acrylate (MPEGA), a novel type of hydrophilic polymer antistatic agent (PDSM) was created. By utilizing FT-IR and 1 H NMR, the structure and properties of the PDSM copolymer were investigated. By using the melt blending approach, composites made of ABS (acrylonitrile-styrene-butadiene copolymer)/PDSM were generated. The composites’ mechanical characteristics and surface resistivity were measured. The results indicated that PDSM was evenly dispersed on the inner surface of ABS resin, resulting in a continuous conductive network, and serving the intended function of long-lasting antistatic. The surface resistance of ABS composites could be greatly decreased using the PDSM copolymer antistatic agent. Surface resistivity of ABS/PDSM composites were around 10 9 -10 10 Ω when the proportion of PDSM copolymer was up to 15 wt%. As MPEGA concentration increased, the surface resistivity of ABS/PDSM materials declined because MPEGA comprised hydrophilic ether bonds and flexible side chains.
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RARE METALS
·
2025
·
IF 11
Zhao Ya-Ling,Zhai Yu-Ting,Zhu Wen-Ping,Liu Zeng-Chen,Gao Shu-Yan
The steps of NO 3 − adsorption, deoxygenation, nitrogen species hydrogenation and ammonia desorption are vital for electrocatalytic nitrate reduction (NO 3 − RR) to ammonia, and lowering their Gibbs free energy change (Δ G ) is the essential approach for improving NO 3 − RR. The copper-based alloys are considered as the outstanding catalysts thanks to the tunable d-band center, reconstruction and synergistic effect of multiple metal atoms in the past decades. Here, we synthesized a single-phase copper-nickel alloy by electrodeposition and optimized its Δ G during NO 3 − RR through tuning the electrodeposition potential to regulate the metal component ratio. The atomic ratio of Ni/Cu in CuNi alloys is gradually increased as the negative shift of deposition potential from −1.0 to −1.2 V versus SCE, thus achieving the fast modulation of intermediate adsorption energy for NO 3 − RR. According to density functional theory, profited by a strong NO 3 − adsorption and a weak NH 3 desorption energy barrier, the optimized CuNi alloy (Cu 3 Ni 1 /CF) exhibits an ideal ammonia yield of 364.1 μmol cm −2 h −1 and Faradaic efficiency of 92.25% at −0.23 V versus RHE. Further applying Cu 3 Ni 1 /CF as the cathode material, a novel Zn-nitrate battery exhibits a maximum power density of 5.85 mW cm −2 with a NH 3 yield of 92.50 μmol cm −2 h −1 and Faradaic efficiency of 99.15% at 20 mA cm –2 for NH 3 production. This work not only offers a rational design concept with clear guidance for efficient modulation of intermediate adsorption free energy on alloy catalysts prepared by electrodeposition, but also provides the further understanding for efficient developments of NO 3 − RR and Zn-based batteries. Graphical abstract
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高影响因子
RARE METALS
·
2025
·
IF 11
He Shuai,Zhao Man,Zhao Peipei,Ma Jiamin,Liu Chunmei,Xiao He,Zhang Li,Zhang Junming,Hu Tianjun,Wang Shengxiang,Pang Huan,Jia Jianfeng
Nickel-based catalysts display promising potential in integrated hydrogen production through methanol electrooxidation (MOR). The unavoidable self-oxidation from Ni(OH) 2 to NiOOH severely restricts their MOR performance. To inspire the progress of MOR before self-oxidation of Ni species by altering reaction pathways, a heterostructured Ni–WO 2 catalyst is constructed to follow the direct electrooxidation pathway of methanol. In-situ/ex-situ characterization techniques combined with density functional theory calculations reveal the constructed Ni–WO 2 heterostructure alters the electronic structure of Ni site. It’s found Ni–Ni bond in Ni–WO 2 becomes longer and the electrons transfer from Ni sites to W sites. This results in upshifted d band center of Ni site and its closing to the Fermi energy level, which optimizes the CH 3 OH adsorption and the deprotonation of *CH 3 O into *CH 2 O in potential-determining step. Moreover, the formed asymmetric adsorption sites increase the polarity of the methanol and the intermediate. As expected, CH 3 OH molecule is highly converted into HCOOH via direct electrooxidation pathway. This obtained Ni–WO 2 exhibits superior MOR activity with high peak current density of 325.26 mA cm −2 and performs long term of 90 h at 10 mA cm −2 in hydrogen production. This work provides an important guidance for designing efficient Ni-based samples for direct electrooxidation of methanol. Graphical abstract
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JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 21
·1-15
·
IF 2.8
Ni Chuyao,Xiao Jianwu,Cao Jun,Pan Jiaqi,Li Chaorong,Zheng Yingying
In order to detect glutathione (GSH), a highly fluorescent carbon dots-MnO 2 nanosheet composite sensing device was built in this work. Strongly green fluorescent carbon dots (CDs) were first created using hydrothermal technique, and the emission wavelength of CDs was 530 nm when excited by optimal excitation wave of 420 nm. CDs-MnO 2 nano fluorescent probe for GSH detection was constructed by the combination of the carbon dots and the manganese dioxide nanosheets (MnO 2 ) through electrostatic action. Fluorescence resonance energy transfer (FRET) between CDs and MnO 2 caused CDs’ fluorescence to be extinguished. With increase of the addition of MnO 2 , the system’s fluorescence intensity dropped and then stabilized. Sensing system’s fluorescence was restored by addition of GSH because GSH degraded and reduced MnO 2 into Mn 2+ ions, which caused MnO 2 nanosheets to release carbon dots subsequently. Sensing system showed strong selectivity for GSH and demonstrated a good linear relation between the fluorescence intensity and GSH concentration within 0.1 to 1 mM, and the detection limit was 1 μM. Due to the convenient preparation method of carbon dots, simple and fast detection system as well as high sensitivity, the sensing system has significant advantages and has excellent prospects in the field of fluorescence imaging and biochemical analysis.
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高影响因子
JOURNAL OF POLYMER RESEARCH
·
2025
·Vol. 32
·期 7
·1-8
·
IF 2.8
Liu Huiping,Sui Luyu,Luo Shilei,Wang Zixin,Xu Meng,Zhong Ming,Hou Haoqing,Peng Xinwen
Polyimide (PI) is very popular in polymer film capacitors due to its excellent performance and easy film-forming properties. However, its relatively low dielectric constant (approximately 3–4) limits its application and development in the field of high-performance capacitors. In general, dielectric constant can be enhanced effectively by adding special filler materials into polyimide. In this study, core–shell structured C@SiC nanoparticles were synthesized via a hydrothermal method. Novel polyimide composites (C@SiC/PI) were obtained by dispersing C@SiC nanoparticles into polyamic acid, followed by thermal imidization. The dielectric constant of C@SiC/PI composite material is as high as 40.2, which is 11.4 times that of pure PI. The maximal discharging energy density reached up to 2.49 J cm −3 with 10% C@SiC nanoparticles, which is almost 3 times higher than pure PI under identical conditions. Additionally, the composites have excellent thermal stability with a decomposition temperature of 5% above 530℃. The tensile strength of the composite film is in the range of 89.7–130.50 MPa, and the elongation at break is between 5.4% and 9.1%, maintaining good mechanical properties. Consequently, the fabricated composites hold significant promise for applications in polymer thin-film capacitors and flexible electronics.
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高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 21
·1-13
·
IF 2.8
Sun Li,Wang Shuimiao,Bai Yuehao,Li Guang,Tao Yong,Wang Wei,Yang ChangAn
Lithium–sulfur (Li–S) batteries have garnered significant research interest owing to their exceptional theoretical energy density, coupled with the cost-effectiveness and environmental sustainability inherent in sulfur-based cathode materials. Nevertheless, the practical implementation of these systems remains impeded by challenges, such as the shuttle effect of soluble lithium polysulfide intermediates during cycling, which contributes to rapid capacity degradation and suboptimal electrochemical performance in current Li–S configurations. Herein, a sulfur-containing composite, S@V 2 O 5 /KB, was synthesized using a straightforward high-temperature melt synthesis method. The V 2 O 5 /KB composite was obtained by mixing vanadium pentoxide (V 2 O 5 ) and Ketjen black (KB) through a simple ultrasonic process, followed by high-temperature melting to yield the sulfur-containing composite, S@V 2 O 5 /KB. Constant current discharge tests demonstrated that the addition of KB as a conductive agent significantly improved the performance of the battery. The optimal performance was achieved when the mass ratio of V 2 O 5 to KB was 2:1. After 100 cycles at a rate of 0.5C, the capacity of 678.3 mA h g −1 was retained, resulting in a capacity retention rate of 71.67%.
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JOURNAL OF MOLECULAR NEUROSCIENCE
·
2025
·Vol. 75
·期 3
·1-14
·
IF 2.7
Fan Weihao,Ye Yi,Yang Hongkun,Wei Ying,Shi Kaiting,Yang Xinyu,Li Jian,Wang Zilong,Sun Yiming,Liao Linchuan
Ketamine is a synthesized anesthetic drug that was used extensively as a surgical anesthetic in the 1960s. Currently, ketamine is being investigated extensively for its potential as a treatment for depression. However, the addictive nature of ketamine has become an issue that cannot be ignored at this stage. As of now, there is no clear understanding of the changes in striatal metabolites and their relative metabolic pathways under the addictive effect of ketamine. In this study, a stable model of ketamine-induced conditioned place preference (CPP) was established. Non-targeted metabolomics and targeted metabolomics techniques, based on the ultra-performance liquid chromatography-Q Exactive hybrid quadrupole-Orbitrap mass spectrometry (UHPLC-QE/MS) and the UHPLC-MS platform, were employed to uncover the metabolic characteristics and neurotransmitter profiles of the striatum after ketamine abuse in mice. Potential biomarkers and related differential metabolic pathways of this model have been revealed. In non-targeted metabolomics analysis, striatal differential metabolites mainly involve pathways related to arginine synthesis, purine metabolism, and morphine addiction. In targeted metabolism, the striatum of mice receiving ketamine showed an increase in the content of the neurotransmitter kynurenine (Kyn) and a decrease in the content of the neurotransmitter dopamine (DA). Our study suggested that Kyn and DA metabolism disturbances might be associated with ketamine-induced CPP phenotypes and provided a new perspective for investigating the addiction mechanisms of ketamine.
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PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 19
·1-15
·
IF 2.8
Li Zi-Yan,Li Ya-Jun,Li Wei,Wang Ze-Hong,Zhao Zhao-Ye,Zhou Ting-Ting,Huang Yi-Rui,Wu Xiang-Feng,Zhang Peng-Liang,Zhen Zi-Yan,Ci Li-Jie
In this study, a photoelectrochemical sensor for the detection of glucose was developed by combining the unique properties of NH 2 -MIL-125 and Ti 3 C 2 film. The relationship between the microstructure of the samples and their performance in glucose detection was investigated. Experimental results demonstrated a linear decrease in the differential pulse voltammetry current of the Ti 3 C 2 /NH 2 -MIL-125-3 photoelectrochemical sensor with increasing glucose concentration. Below 200 μM, the relationship between DPV current and glucose concentration was found to be: I (mA) = − 3.86667 × 10 –8 ·c g (μM) + 3.66 × 10 –4 (c g denoted as the concentration of glucose). Above 200 μM, the relationship was: I (mA) = − 4.03049 × 10 –8 ·c g (μM) + 3.68268 × 10 –4 . Density functional theory calculations were in agreement with the experimental data. The Ti 3 C 2 /NH 2 -MIL-125-3 photoelectrochemical sensor demonstrates exceptional glucose detection capability. This technology has the potential to advance the development of MXenes/MOFs-based photoelectrochemical biosensors.
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高影响因子
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
·
2025
·
IF 1.6
Liu Xinying,Lei Yuhan,Shi Jialin,Wang Zixuan,Zhang Wenxiu,Zhang Guanghui,Gu Ping
A novel adsorbent, Mn-MOF-74, was synthesized using a room-temperature, water-based method by assembling Mn 2+ metal nodes with 2,5-dihydroxyterephthalic acid ligands, and was further applied for Co 2+ removal. Mn-MOF-74 exhibited minimal pH dependence within a pH range of 3–8.5, achieving Co 2+ removal efficiencies between 92.5 and 96.3%, with a distribution coefficient of up to 2.9 × 10 4 mL·g −1 . A function relationship between the Co 2+ removal efficiency and the adsorbent dosage or initial concentration was proposed. The dominant removal mechanism was identified as ion exchange between Mn 2+ and Co 2+ , with chemisorption being the primary rate-limiting step.
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高影响因子
JOURNAL OF WUHAN UNIVERSITY OF TECHNOLOGY-MATERIALS SCIENCE EDITION
·
2025
·Vol. 40
·期 4
·1176-1185
·
IF 1.1
Hu Zhengsheng,Tang Xu,Gao Shilong,Li Yingguang,Wang Jiawei,Chen Yanjun,Wang Yifeng
Modified activated carbons (AS) were fabricated through the oxidation effect of ammonium persulfate and applied to the dynamic adsorption of different acrylate gas. The pore structures, surface chemical properties and surface morphology of AS were respectively characterized by N 2 adsorption, Boehm titration, X-ray Photoelectron Spectroscopy (XPS) and scanning electron microscopy (SEM) techniques. After modification, the specific surface area increased from 954 to 1 154 m 2 ·g −1 . The contents of oxygen-containing functional groups on the AS surface increase obviously and have a great effect on the adsorption behavior of acrylate gases. According to the results of dynamic adsorption, the adsorption capacities of acrylates are as the following order: methyl acrylate (461.9 mg·g −1 ) > methyl methacrylate (436.9 mg·g −1 ) > butyl acrylate (381.8 mg·g −1 ), which is attributed to the size adaptability of AS pores and acrylates. The adsorption behavior of AS for acrylate gases conforms to the Bangham model and the Temkin model.
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高影响因子
MICROCHIMICA ACTA
·
2025
·Vol. 192
·期 8
·1-12
·
IF 5.3
Dong Zong-Mu,Qin Liming,Guo Yaqing,Xu Miaoqing,Wu Jian-Feng,Zhao Guang-Chao
A mesoporous surface benzonitrile functionalized covalent organic framework (TpBD-CN-COF) was synthesized as a novel solid-phase microextraction (SPME) fiber coating for the extraction of six hydroxyphenyl esters (PBs), and combined with gas chromatography-flame electric-ion detector (GC-FID). PBs were sensitively determined in aqueous solution. Due to its high specific surface area, high chemical stability in both strongly acidic and alkaline media, and in polar or non-polar media, as well as its high thermal stability, the TpBD-CN-COF fiber coating showed excellent extraction performances for PBs with an enrichment factor twice as high as that of TpBD-COF. Some parameters that influenced the extraction performance, such as extraction time and temperature, pH, and stirring speed were investigated. Under optimal conditions, a wide linear range (0.06–500 μg L −1 ), low limits of detection (LOD, 0.003–0.042 μg L −1 ) were obtained for PBs determination. The relative standard deviations (RSDs, n = 6) for intra-day, inter-day, and fiber-to-fiber were less than 8.06%, 7.8%, and 8.6%, respectively. Furthermore, the analytical method could be successfully used to detect six PBs in cosmetics and environmental water samples, achieving satisfactory recoveries ranging from 85.14 to 107.67%. Graphical
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高影响因子
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