Materials Today Communications
·
2025
·
IF 4.5
Zichen Shi,Zongao Dou,Xiaopeng Sun,Xiao Wu,Zhiqiang Wang,Jing Sun,Qiang Fang
Based on our previous discovery that alkyl-side-chains in the aryl polymers have a positive effect on dielectric properties of the polymers, this work further investigates the side-chain effect by a hydrogenated bio-based cardanol monomer with a long pentadecyl alkyl side chain. The monomer was functionalized by introducing the thermocrosslinkable benzocyclobutene groups, and its cured product displayed a dielectric constant ( ε ) of 2.59 and a dielectric loss ( tan δ ) of 5×10 -4 at a high frequency of 10 GHz. In contrast, a controlling polymer with methyl side chain exhibited a ε of 2.84 and a tan δ of 1.4×10 -4 , respectively. Such data indicate that the long alkyl-side-chains can effectively improve the dielectric properties of the aryl polymers. Moreover, the cured hydrogenated bio-based cardanol also exhibited good hydrophilic properties with the water absorption of 0.16% even immersing it in boiling water for 96 h. These results imply that bio-based cardanol is a potential candidate for the preparation of the low- k materials used in microelectronic industry.
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高影响因子
CERAMICS INTERNATIONAL
·
2025
·Vol. 51
·期 26
·49072-49078
·
IF 5.6
Jie Zheng,Ying Li,Yongtao Huang,Zezhong Wang,Wei Zhang,Chunsheng Zhuang
To assess the potential of YBaCo 4 O 7+δ as a cathode material for proton-conducting solid oxide fuel cells (SOFCs), a proton-oxygen-ion-electron three-phase conductive cathode, YBa 1- x K x Co 4 O 7+δ , was synthesized via the sol-gel method and analyzed concerning its crystal structure, thermal expansion behavior, and electrochemical properties. The results indicate that K doping increases the oxygen vacancy content and enhances proton conductivity. The polarization impedance reaches its minimum when x = 0.05. K doping has a negligible impact on the coefficient of thermal expansion (CTE), and all doped samples exhibit CTEs that align well with common electrolyte materials, thus minimizing thermal stress during SOFC operation. Compared to YBaCo 4 O 7+δ , partial K doping improves the catalytic activity for the oxygen reduction reaction. An anode-supported single cell with the YBa 0.95 K 0.05 Co 4 O 7+δ cathode, using H 2 fuel, delivers a peak power density of 567 mW cm −2 at 700 °C, surpassing the performance of the YBaCo 4 O 7+δ cathode, which achieves 482 mW cm −2 under the same conditions. This study contributes to the development of hexagonal unit-cell cathodes with proton-oxygen-ion-electron three-phase conductivity and high catalytic activity for proton-conducting SOFCs.
研究领域:
材料科学
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电化学
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能源材料
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固体氧化物燃料电池
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高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR MEDICINE
·
2026
·Vol. 57
·期 4
·1-13
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IF 8.5
Peng-Yao Lin,Jia-Rong Xie,Tian-Chen Qian,Shi-Song Wang,Si-Yi Yu,Wen-Bo Shi,Ying Wang,Lu-Ze Cen,Qing-Jing Zhu,Yi-Yang Zheng,Hui Gao,Rong Fang,Zhao-Xia Xia,Ai-Ming Liu,Lei Xu
International Journal of Molecular Medicine is an international journal devoted to molecular mechanisms of human disease.
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PubMed
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
·
2015
·
IF 2.679
Yujuan Chen,Kelei Zhuo,Jing Chen,Guangyue Bai
Apparent molar volumes V Φ ,DIL and viscosity B -coefficients of the dicationic ionic liquids (DILs) in {glucose (Glc) + water} solutions were determined from density and viscosity measurements at T = 298.15 K. Limiting apparent molar volumes V Φ ,DIL 0 of the DILs, volumetric interaction parameters, and activation energies Δ μ DIL 0 ≠ were also obtained, together with the contributions of the solvent property B 1 and the dicationic ionic liquid – solvent interaction B 2 to the B -coefficient. A linear relation was observed between V Φ ,DIL 0 and the number of methylene groups n (CH 2 ) in the alkyl linkage chain of DILs. Volumetric interaction parameters and B 2 values are positive and increase with increasing the length of alkyl linkage chain of the dication. The DIL – glucose interactions were discussed in terms of the size and solvation of the DILs and glucose.
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FLUID PHASE EQUILIBRIA
·
2013
·
IF 2.379
Yumei Kai,Yonghong Hu,Yan Liu,Mengmeng Liang,Wenge Yang,Yu Xi
The solubilities of mercaptosuccinic acid in binary solvent mixtures consisting of water + methanol; water + ethanol; and water + acetone were determined by a dynamic method over the temperature from 278.15 to 333.15 K. The solubility data were correlated with the modified Apelblat equation and the semi-empirical Buchowski–Ksiazczak λh equation. The Buchowski–Ksiazczak λh equation can regress the solubility data much better than Apelblat equation. The calculated values are in good agreement with the experimental values. This study provides valuable data for the mercaptosuccinic acid purification by the preferential crystallization procedure.
研究领域:
物理化学
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化学工程
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热力学
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分离过程
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溶液化学
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高影响因子
NANOTECHNOLOGY
·
2021
·Vol. 32
·期 21
·215202
·
IF 3.874
Guandong Wang,Daiming Liu,Shuangqing Fan,Zhaoyang Li,Jie Su
In this work, high-dielectric-constant (high-k) erbium oxide（Er2O3）film is fabricated using the spin coating method, and annealed at a series of temperatures (from 400 °C to 700 °C). The effect of annealing temperature on the microstructural and electrical properties of Er2O3 nanofilm is investigated. To demonstrate the applicability of the Er2O3 film, the indium oxide (In2O3) thin film transistor (TFT)-based amorphous Er2O3 dielectric film is fabricated at different temperatures. The TFT-based EO-600 shows a low-operating voltage and good electrical properties. The inverter demonstrates that the Er2O3 nanofilm synthesized by the sol-gel method could be a promising candidate as the dielectric layer in a low-voltage electronic device.
研究领域:
材料科学
·
电子工程
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2026
·
IF 2.4
Jia Xu,Xun Wang,Jiazheng Qin,Ziwei Hu,Ruyi Lin,Yong Ma,Dan Li,Lingzong Meng
The solid–liquid phase equilibria of the quaternary system Na+, Cs+//Cl–, CO32––H2O and its subsystem Na2CO3–Cs2CO3–H2O at 308.15 K were studied by the isothermal dissolution method. The phase diagram of the system Na2CO3–Cs2CO3–H2O is composed of two single-salt crystallization fields of Na2CO3·H2O and Cs2CO3·H2O, two solubility univariant curves, and one invariant point. The dry-salt phase diagram of the quaternary system consists of three invariant points, seven univariant curves, and five crystallization regions corresponding to Na2CO3·H2O, NaCl, solid solution [Cs1–x(Na·H2O)x]Cl, Cs2CO3·H2O, and double salt CsCl·2NaCl·2H2O. The areas of crystallization zones decrease according to the above order. The Jan̈ecke index of H2O, pH, and refractive index of the liquid phase in the quaternary system change regularly with the Jan̈ecke index of Cs+. These results on the phase diagram of the quaternary system can supply theoretical references for cesium salt separation from carbonate-type brine.
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APPLIED CATALYSIS A-GENERAL
·
2026
·
IF 4.8
Jue Wang,Huitao Liu,Siyu Zeng,Jinyi Yang,Zaihui Fu,Youji Li,Senpei Tang,Anqun Su
Merely 1.2 wt% KCCN elevates cyclohexane conversion to 64.47%, 2.5-fold that of pure QA-DT. • QA-DT performs HAT cleavage, while KCCN activate O 2 , enabling an efficient catalytic cycle. • The system achieves high ketone/alcohol selectivity (K/A ratio ∼5) and total selectivity > 95%. • The nanosheet-cluster interface boosts visible light absorption and stabilizes the catalyst. The selective oxidation of cyclohexane to KA oil holds significant importance in both fundamental research and industrial applications, with the formation of cyclohexyl hydroperoxide serving as a crucial rate-determining step. In this study, a hybrid material designated as QA-DT@KCCN was constructed through the in-situ composition of potassium/cyano-comodified carbon nitride nanosheets (KCCN) and quaternary ammonium-decatungstate (QA-DT), aiming to enhance the mass transfer efficiency of O 2 and improve the utilization efficiency of hydrogen atom transfer products. The results demonstrate that a minimal KCCN doping of 1.2 wt% significantly enhanced the photocatalytic oxidation performance. Under light irradiation in acetonitrile for 2 h, a cyclohexane conversion rate of 64.47% was achieved (compared to 25.18% with pure QA-DT), with a ketone/alcohol ratio of 5.02 and overall selectivity exceeding 95%. Radical quenching and trapping experiments confirmed that superoxide anion radicals (•O 2 - ) and holes (h + ) are the key active species in this photocatalytic system. The unique nanosheet-cluster interfacial coupling effect in the hybrid material not only facilitates directional electron transfer but also enhances visible light absorption and stabilizes the ionic structure of decatungstate. This study provides a novel strategy for designing high-efficiency decatungstate catalysts, offering valuable insights to advance the technology of selective inert hydrocarbon oxidation. Download: Download high-res image (208KB) Download: Download full-size image
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ACS Sustainable Chemistry & Engineering
·
2026
·
IF 7.6
Riyang Shu,Haozhe Huang,Bin Hu,Long Xie,Xintong Chen,Zhipeng Tian,Chao Wang,Jingtao Zhang,Sheng Yang,Xianglong Luo,Ying Chen
Methanol steam reforming is a popular technology for hydrogen production, but it usually suffers from the methanation side reaction and low hydrogen yield. Herein, a novel K-doped Ru/CeO2 catalyst was proposed to suppress methanation and enhance hydrogen production. The Ru-5K/CeO2 catalyst doped with 5 wt % K achieves 100% methanol conversion, a 0.578 mol·g–1·h–1 hydrogen production rate, and 66.4% hydrogen selectivity at 450 °C, with only 3.6% CH4, which is much better than other Ru–K/CeO2 catalysts. Under the same conditions, Ru/CeO2 and Ru-10K/CeO2 only achieve 0.268 mol·g–1·h–1 and 0.224 mol·g–1·h–1 hydrogen production rates, 64.1% and 64.5% hydrogen selectivity, respectively. The promotion effect and mechanism of K doping on the methanation suppression of Ru/CeO2 catalysts in the methanol steam reforming process were investigated in detail. Characterization and experimental results show that suitable K doping in the Ru/CeO2 catalyst enhances the metal–carrier interactions and induces the formation of abundant oxygen vacancies at the same time. And the hydrogen atom dissociation and water–gas shift reactions on the catalyst surface are promoted significantly. Additionally, in situ DRIFTS characterization presents that the Ru-5K/CeO2 catalyst dominates the formation of the bridged carbonyl (Ru-CO-K) intermediate. This inhibits methane formation due to the interaction between Ru and K, and strengthens the connection of CO generated by methanol decomposition. The increase in K leads to the formation of abundant oxygen vacancies in CeO2, which promotes the dissociation of water to form hydroxyl groups and hydrogen and facilitates the water–gas shift reaction. The conversion of bridged carbonyl groups to CO2 and H2 is also accelerated, and methane formation through this dual regulatory mechanism is thus inhibited. This work offers fresh perspectives and a useful reference for hydrogen production, contributing to the ongoing discussion on the role of alkali metals in promoting methanol steam reforming.
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INORGANIC CHEMISTRY
·
2025
·
IF 4.7
Wenzhuo Chen,Jian Yang,Jiazheng Hao,Feiran Shen,Lunhua He,Xia Deng,Jiasheng Lv,Jing Fang,Laijun Liu,Jungu Xu
The undoped K2ZnV2O7 material has a melilite-like structure, with the K+ ions distributed orderly on two distinguishable crystallographic sites, which is the main difference with the case in a typical A2B3O7 melilite material where the A site cations occupy only one crystallographic position. Herein, we report that substitution of Ga for Zn in K2ZnV2O7 would induce the K+ ions’ order-to-disorder transition and transform the K2ZnV2O7 from the melilite-like structure to a typical melilite phase, coupled with significantly enhanced oxide ion conductivity, e.g. ∼1.01 × 10–1 S/cm at 600 °C for the K2Zn0.7Ga0.3V2O7.15 sample, which is about 2 orders of magnitude higher than the parent material. The powder neutron diffraction data analysis results revealed two sites for the interstitial oxygen defects that are introduced by the donor-doping. The introduction of interstitial oxygen into the K layer strongly correlated with the K ions’ order-to-disorder transition, while the interstitial oxygens within the 5-fold (Zn/Ga/V)O4 tetrahedral rings are responsible for the enhanced oxide ion conductivity. These findings provided a comprehensive understanding of the melilite-like and typical melilite materials for the mechanism of the stabilization and migration of interstitial oxygen defects.
研究领域:
材料科学
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固体化学
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电化学
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晶体学
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无机化学
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PubMed
高影响因子
ACS Applied Energy Materials
·
2025
·
IF 5.5
Shiqiang Zhong,Jingwei Liu,Yongcong Huang,Yulin Cao,Feng Wu,Xuhui Li,Dawei Luo,Zhouguang Lu,Hua Cheng
Spinel LiMn2O4 (LMO) is a promising fast-charging cathode material because its unique three-dimensional Li-ion diffusion channels offer favorable ionic diffusivity. However, LMO encounters rapid structural degradation at high current densities. To tackle this issue, we introduce K+ ions into the interstitial 16c sites to stabilize LMO, thereby achieving excellent fast-charging capability. The K-LMO retains 75% of its theoretical capacity at an ultrahigh current density of 1.48 A g–1 (10 C, corresponding to a charging time of 5 min). Comprehensive characterizations demonstrate that the incorporation of K+ into LMO expands the LiO4 space, strengthens the Mn–O bonds and suppresses the Jahn–Teller effect, leading to improved Li-ion mobility and enhanced stability of the diffusion channels. Additionally, the volume variation induced by cycling under a high charge state is efficiently suppressed through a solid-solution transition, thus preventing structural degradation against long-term cycling. Given this, this study presents an attractive candidate material for the cathode of fast-charging lithium-ion batteries.
研究领域:
材料科学
·
电化学
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Yunping Wang,Chenlin Mu,Jingtao Bi,Mengmeng Sun,Yingying Zhao
The monovalent cation exchange membrane (MCEM) plays a crucial role in strategic resource recovery fields such as lithium/magnesium separation and seawater softening. This study proposes a two-stage modification strategy of “nanoparticle deposition – quaternization cross-linking”: first, deposit the Polypyrrole -Polyethyleneimine (PPY-PEI) composite nanoparticles in situ on the commercial Cation Exchange Membrane (CEM) surface, and then undergo quaternization cross-linking to prepare a high-performance monovalent cation exchange membrane (MCEM). The rigid structure of Polypyrrole -Polyethyleneimine (PPY-PEI) nanoparticles completely avoids the traditional problem of monomer penetration, and the rate of membrane pore blockage is significantly reduced. Electrified nanoparticles form gradient nanochannels to achieve dual mechanism synergy: The surface positive charge layer repels and blocks Mg 2+ through the Donnan effect; 2–5 nm mesoporous channels facilitate K + transport through size sieving. Subsequent quaternization crosslinking strengthened the modified layer and increased the positive membrane charge density, leading to further improvement in perm-selectivity. The results show that the modified membrane achieves a breakthrough performance in the separation of K + /Mg 2+ : the selectivity reaches 6.9; the K + flux remains at 0.14/(m 2 ·s). Molecular dynamic simulation of the ion diffusion behavior confirmed that the presence of Polypyrrole -Polyethyleneimine (PPY-PEI) can accelerate the diffusion rate of K + while limiting the transport of Mg 2+ , providing a theoretical basis for the performance prediction of selective ion exchange membranes.
研究领域:
膜科学与技术
·
分离工程
·
材料化学
·
环境功能材料
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离子传输
·
电化学
·
资源回收
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