MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2022
·
IF 4.644
Weipeng Liu,Benwei Zhou,Hualong Wang,Chengjun Li,Yi Du,Chuanbing Cheng
Compositional fluctuation of the K and Na elements during the preparation process becomes a major issue for (K,Na)NbO 3 (KNN) lead-free ceramics to maintain relatively stable electrical properties. The raw material Bi 2 O 3 is more sensitive to high temperature. To improve electrical properties, it is more necessary to compensate the volatile Bi. In this work, the 0.96K 0.48 Na 0.52 Nb 0.96 Sb 0.04 O 3 -0.04Bi 0.5*(1+ x ) Na 0.5 ZrO 3 ( x = −0.05, −0.02, 0.00, 0.02, 0.05, and 0.08) ceramics were selected as basis material. The excess Bi can increase the phase fraction of the T phase and decrease oxygen vacancy content, which effectively enhance the extrinsic contribution of the piezoelectric response. The electromechanical properties were optimized by excess Bi, and the optimal properties ( d 33 = 522 pC/N, k p = 58.9%, T c = 235 °C) were obtained in the ceramic with x = 0.05. The present work provides new guidelines for enhancing the piezoelectric performance of KNN ceramics by a simple method, which can be applied to other lead-free piezoelectric ceramic systems.
研究领域:
材料科学
·
电子工程
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DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2018
·
IF 2.196
Xianze Meng,Xiaozhen Wu,Junsheng Yuan
Solid–liquid equilibria of the quaternary system (Ca2+, Mg2+//SO32–, SO42–-H2O) and its ternary systems (Ca2+//SO32–, SO42–-H2O; Mg2+//SO32–, SO42–-H2O and Ca2+, Mg2+//SO32–-H2O) at 298.15 K were investigated via isothermal solution saturation method. Furthermore, the phase diagrams of these systems were constructed. The results show that the quaternary diagram contains three invariant points, seven univariant curves, and five crystallization fields corresponding to MgSO4·7H2O, MgSO3·6H2O, CaSO3·0.5H2O, Ca(SO3)0.89(SO4)0.11·0.5H2O, and CaSO4·2H2O. The crystallization field of Ca(SO3)0.89(SO4)0.11·0.5H2O is the largest compared with the others. In addition, crystal complex Ca(SO3)0.89(SO4)0.11·0.5H2O also appears in the ternary system (Ca2+//SO32–, SO42–-H2O), which contains two invariant points, three invariant curves, and three crystallization fields. Both of the other two ternary diagrams contain one invariant point, two invariant curves, and two crystallization fields. The Pitzer model was applied to calculate salt solubilities, and the results agree well with the experimental data. Binary and ternary ionic interaction parameters (θSO4,SO3, ψMg,SO4,SO3, ψCa,SO4,SO3, and ψCa,Mg,SO3) and ion pair parameters (CaSO3 and MgSO3) are presented in this work based on the solubilities of these ternary systems.
研究领域:
化学
·
材料科学
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DOI
高影响因子
iScience
·
2022
·
IF 6.107
Jian Zhang,Jing Chen,Yufei Lu,Yan Yang,Weize Chen,Bo Shen,Jiachang Hu,Ping Jia,Sujuan Xu,Yiqin Shi,Yichun Ning,Jialin Wang,Yi Fang,Shuan Zhao,Yang Li,Yan Dai,Xiaoyan Zhang,Meng Xiang,Yang Tian,Zhichao Liu,Nana Song,Xiaoqiang Ding
Summary TWIK-related acid-sensitive K + channel-2 (TASK-2, encoded by Kcnk5 ) is essential in cell biological processes, by regulating transmembrane K + balance. In the present study, we aimed to clarify the role of TASK-2 in renal fibrosis and explore the underlying mechanism. We found that TASK-2 level was elevated in the renal tubular UUO- and UIR-induced renal fibrosis as well as in patients with renal tubulointerstitial fibrosis. Knockout of Kcnk5 or inhibition of TASK-2 in renal tubules attenuated G2/M cell-cycle arrest and alleviated renal fibrosis. Mechanistically, demethylase fat mass and obesity-associated protein (FTO) reduced N6-adenosine methylation (m6A) of Kcnk5 mRNA following renal fibrosis. FTO deficiency attenuated the upregulation of TASK-2 and renal fibrosis. The results demonstrated the crucial role of TASK-2 in renal fibrosis, which is conducive to a better understanding of the pathogenesis of renal fibrosis. TASK-2 may be a potential treatment strategy to alleviate the development of renal fibrosis.
研究领域:
肾病学
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分子生物学
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细胞生物学
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DOI
PubMed
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2024
·
IF 4.1
Jihui Yao,Lijuan Su,Lipeng Guo,Xing Wu,Haibo Zhu
N -ethylcarbazole, as a liquid organic hydrogen carrier, has shown great promise in the field of hydrogen storage technology. The development of efficient and stable catalyst for producing H 2 through N -ethylcarbazole dehydrogenation is crucial for its practical application. In this study, a series of mesoporous Al 2 O 3 -supported Pt catalysts with K modification were developed for N -ethylcarbazole dehydrogenation. These catalysts were characterization using various techniques including XRD, N 2 adsorption–desorption, TEM, 27 Al MAS NMR, XPS, NH 3 -TPD, H 2 -TPR, CO-FTIR, and Py-IR, providing detailed structural information to elucidate the structure–activity relationship. Mesoporous Al 2 O 3 was found to possess significant amounts of coordinatively unsaturated pentacoordinate Al 3+ , which greatly promotes the dispersion of Pt species for the formation of small Pt particles. The addition of K was observed to modulate the electronic structure of Pt, reduce the acidity of the catalysts, and inhibit the sintering of Pt. These synergetic effects led to Pt 3.0 /K 3.0 -Al 2 O 3 -m achieving remarkable performance in dodecahydro- N -ethylcarbazole dehydrogenation at 180 °C and 101 kPa, delivering a dodecahydro- N -ethylcarbazole conversion of 100 %, H 2 release amount of 5.63 wt% and dehydrogenation efficiency of 97.10 %. Additionally, this catalyst demonstrated high efficiency in the dehydrogenation of dodecahydro- N -propylcarbazole, octahydro-2-methylindole, and octahydro-1,2-dimethylindole, achieving dehydrogenation efficiencies of 99.60 %, 100 % and 100 %, respectively. These findings provide valuable knowledge for the rational design of efficient metal-based catalysts for liquid organic hydrogen carriers in hydrogen storage systems.
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2026
·Vol. 61
·期 32
·23583-23603
·
IF 4.4
Luo Jian,Li Wenbin,Jin Chenkai,Huang Juncheng,Fang Chao,Song Lixin,Na Haining,Zhu Jin
Rare-earth-free carbon nitride luminescent materials that remain bright during prolonged high-temperature operation are highly desirable for harsh-environment optoelectronics, yet their emission is often limited by thermally activated non-radiative pathways and accelerated weathering under ultraviolet (UV) irradiation. Here, we report a K/Na co-regulated carbon nitride (K/Na-CN) prepared via a solid-state route. Temperature-dependent photoluminescence (PL) measurements show a well-preserved emission band with only limited chromaticity deviation over a broad heating window. Under vacuum, K/Na-CN retains ~ 50% of its initial PL intensity at 300 °C and maintains ~ 70% PL intensity after holding at 300 °C for 60 min. During UV aging (0–192h), the powder PL intensity increases to ~ 1.7–1.8 × at 48h, reaches a maximum of ~ 2.4 × at 144h, and remains at ~ 1.5 × after 192h, which indicates robust emissive states despite irradiation-driven defect-state rebalancing. After incorporation of K/Na-CN into PMMA to prepare transparent luminescent plates, at an optimized loading, the composite shows the best dispersion and maintains high optical clarity (visible transmittance > 80% and reflectance < 12%), while providing improved UV service behavior. After UV exposure, the composite emission exhibits a systematic blue shift from ~ 530 nm (0h) to ~ 500 nm (48 h) and ~ 480 nm (96h). Meanwhile, the weak intensity gap is consistent with bulk particle aggregation and inner-filter effects limiting the effective radiative gain. Overall, K/Na-CN combines sustained high-temperature fluorescence with UV-tolerant performance in both powders and transparent polymer composites, offering a practical platform for long-service luminescent components operating under heat and irradiation stress.
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高影响因子
ELECTROCHIMICA ACTA
·
2026
·
IF 5.8
Xiaoqian Tan,Yiyue Luo,Zehao Yu,Menghan Li,Chao Wang,Tingxin Ma,Wei Liu,Fuyi Jiang,Litao Kang
A K⁺/Zn²⁺ dual-ion electrolyte is proposed to suppress dissolution and stabilize KZnHCF counter electrodes. • The electrolyte ensures high electrochemical activity for both the PB working electrode and the KZnHCF counter electrode. • The optimized PB-KZnHCF device achieves a large optical modulation, fast switching speed, and excellent cycling stability. KZnHCF (K 2 Zn 3 [Fe(CN) 6 ] 2 ), a typical Prussian blue analog (PBAs), exhibits high transparency regardless of the redox states, making it an ideal transparent counter electrode material for electrochromic devices. However, its cycling durability is seriously limited by stability issues deriving from material dissolution. In this work, we propose a K + /Zn 2+ dual-cation electrolyte to enhance the cycling durability of KZnHCF by changing the Zn 2+ dissolution equilibrium between the electrolyte and the electrode. This electrolyte formulation is also compatible with the Prussian Blue (PB) electrochromic electrodes, enabling excellent electrochromic performance. Based on these merits, a high-performance electrochromic device is constructed by pairing the PB working electrode with the KZnHCF counter electrode in the K + /Zn 2+ electrolyte. This device demonstrates a desirable optical modulation of 52.7% at 633 nm with a coloration and bleaching response time of 5 and 14 s, respectively. After 1000 cycles, 77.8% of the initial optical modulation retains, indicating a decent cycling stability. This work underscores the promise of electrolyte engineering in addressing stability challenges of electrodes, offering a viable pathway to improve the performance of Prussian blue (PB)-based electrochromic devices. Download: Download high-res image (107KB) Download: Download full-size image
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DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2026
·
IF 5.2
Zhongyu Yang,Chunyan Chen,Shiwei Xu,Yu Zhang,Jiacheng Dong,Liying Huang,Guofeng Wang,Yueyue Feng,Yanhua Rao,Ying Liu,Chao Deng,Nannan Liu
Solid-state biomimetic channels are attractive for label-free ion analysis, but their performance is often undermined by fragile functional layers confined within narrow nanopores. Here we report a pore-in self-assembly strategy that integrates silica nanotubes (SiO 2 NTs) into a glass microtube (GMT) to construct a robust, label-free potassium ion (K + ) sensor. Thiol-functionalized SiO 2 NTs, possessing hollow tubular morphology and abundant surface anchoring groups, are capillary-wicked into the GMT lumen where they spontaneously assemble into a continuous three-dimensional porous scaffold. This hierarchical architecture effectively stabilizes the ion transport pathway and recognition sites, preventing functional disintegration under electric field-induced translocation. This platform enables detection of target potassium ion down to 0.597 μM, even at concentrations of other metal ions up to five times higher. Furthermore, by leveraging the reversible folding behavior of G4 DNA in response to potassium ion and 18-crown-6 ether, an INHIBIT logic gate was constructed that translates dual chemical inputs into discrete electrical output. This pore-in architecture combines simplicity, label-free operation, and robustness, demonstrating broad potential for intelligent ion sensing and molecular logic operations in complex environments.
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DOI
高影响因子
JOURNAL OF THE ENERGY INSTITUTE
·
2026
·
IF 6.5
Daoheng Zhang,Jiawei Zhang,Jian Xing,Zhuozhi Wang,Xingcan Li,Shuai Guo
One-step flotation–activation for CGFS-derived catalysts. • Ni- and K-modified catalysts show distinct reforming pathways. • Ni-based catalysts achieve high tar conversion (97.2%) with coke resistance. • K favors CH 4 formation while Ni enhances H 2 -rich syngas production. Efficient and stable catalysts are essential for biomass-tar reforming in sustainable biomass gasification systems that utilize low-cost solid waste feedstocks. In this study, coal gasification fine slag (CGFS) was processed by saline flotation to enrich the residual carbon fraction and remove ash content, yielding a support material with enhanced catalyst surface area and pore volume. Low-concentration saline flotation produced supports with greater specific surface areas (S BET ), while high-concentration saline flotation yielded catalysts with superior catalytic performance. Catalytic performance was primarily determined by the nature of the metal loading. Ni-loaded catalysts (Ni4) achieved higher tar-conversion rates and CO yields than K-loaded counterparts (K4), with substantially greater H 2 production. Conversely, K4 produced higher CH 4 yields than Ni4, attributable to enhanced high-temperature methanation leading to higher CH 4 selectivity, whereas Ni-based catalysts showed superior overall catalytic performance and anti-coking ability, attributable to their unique FeNi 3 alloy active centers. Furthermore, regeneration tests demonstrated that both Ni4 and K4 catalysts retained considerable tar conversion capability after three reaction–regeneration cycles, highlighting their potential for cyclic utilization. These results demonstrate the potential of CGFS as a low-cost tar conversion catalyst. Download: Download high-res image (462KB) Download: Download full-size image
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高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-13
·
IF 15.7
Guo Qiubo,Han Shuai,Lu Yaxiang,Xiao Ruijuan,Li Jin,Hao Qingli,Rong Xiaohui,Weng Suting,Niu Yaoshen,Ding Feixiang,Yang Yang,Xia Hui,Wang Xuefeng,Xie Fei,Zhou Lin,Hou Xueyan,Li Hong,Huang Xuejie,Chen Liquan,Hu Yong-Sheng
Prussian blue analogues (PBAs) are promising electrode candidates for aqueous batteries because the inevitable interstitial water is generally thought to have little impact on battery performance. Currently, mounting researches have focused on optimizing PBA properties by varying transition metal composition, but less attention has been paid to interstitial water, especially in alkali metal-ion deficient PBAs with large cavities. Here, we employ the water-rich K 0.01 Mn[Cr(CN) 6 ] 0.74 ·4.75H 2 O as the negative electrode to study the effect of interstitial water. It is found that during de-potassiation, the electrode undergoes dehydration, which negatively impacts kinetics, distorts structure, and raises charging potential. A cation-self-shielding strategy involving Dihydroxyacetone (DHA) in the electrolyte to secure the water-rich state is then proposed. The built 1.82 V all-Prussian blue aqueous K-ion battery delivers a high practical specific energy of ~76 Wh kg −1 over 1.5 V (based on the total mass of active materials in both electrodes). This study reveals the significance of interstitial water on the kinetics of PBA negative electrodes and promotes the exploration of water-containing electrodes to develop high-voltage aqueous rechargeable batteries for energy storage applications.
研究领域:
储能
·
材料科学
·
电化学
·
电池技术
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产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Danli Tang,Dengjie Zhong,Yongxian Zhou,Yunlan Xu,Tanxia Xiang,Wantao Li,Yuanfang Yang,Chunmiao Fan,Jisai Chen
In this study, the magnetic composite catalyst, CuFe2O4 modified Co-Al layered double hydroxide supported by alkali-activated N,S-codoped biochar (CFO/CoAl-LDH@K-NSBC) was developed to activate ozone to degrade methylene blue (MB). The MB degradation efficiency of the CFO/CoAl-LDH@K-NSBC/O3 system was 96.30% in 7 min, and it still remained at 92.85% after 5 cycles. Notably, in the pond water matrix, the degradation efficiency only decreased by 6.44% after five cycles, which confirmed its remarkable stability and application prospects. Electrochemical analysis revealed that the comodification of CFO and CoAl-LDH significantly enhanced the charge transfer and catalytic activity of K-NSBC. The results of material characterization and quenching experiments showed that highly exposed active sites, including oxygen vacancies (Ov), Co3+/Co2+, Fe3+/Fe2+, Cu2+/Cu+, pyridinic N, graphitic N and thiophenic S, synergistically drove O3 activation to generate 1O2, ·OH, and ·O2– to participate in MB degradation, among which 1O2 was the main reactive oxygen species. This study provides a novel approach for the preparation of environmentally friendly biochar-based multimetal oxides with high catalytic activity.
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2015
·
IF 2.037
Haijun Han,Dongdong Li,Lijiang Guo,Yan Yao,Haitang Yang,Dewen Zeng
Water activity for binary KCl–H2O, NaCl–H2O and MgCl2–H2O, as well as two ternary NaCl–MgCl2–H2O and KCl–MgCl2–H2O, systems has been measured by using an isopiestic method at 323.15 K. The isopiestic results obtained show that the isopiestic composition lines of the NaCl–MgCl2–H2O system was found to obey the Zdanovskii rule, whereas the KCl–MgCl2–H2O system was observed to deviate slightly. The experimental water activities determined were applied to regress the parameters of the Pitzer model with a good agreement. The model with new parameters is validated by comparing water activity predictions with those given in the literature and not used in the parametrization process and calculating the solubility of the NaCl–MgCl2–H2O and KCl–MgCl2–H2O systems at various temperatures with the comparison of literature values.
研究领域:
化学
·
热力学
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DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Jianghua Wu,Faisal Faiz,Mashkoor Ahmad,Miao Zhengjie,Zha Qiang,Wei Xu,Xiaojin Zhao,Xiaofang Pan,Yasir Faiz
The fabrication of supercapacitors with outstanding performance is presented with a distinct defect-rich nanostructures. A one-pot, energy-efficient method for synthesizing defective manganese dioxide nanowires doped with potassium (K 0.35 MnO 2 ) was developed. The introduction of potassium ions at 35 % birnessite resulted in a significant increase in lattice defects and an improvement in conductivity. Addition of KOH induces a phase transition from α-MnO 2 to δ-MnO 2 . These imperfections result in a greater quantity of active sites, which are crucial for the process of energy storage. The K 0.35 MnO 2 structure demonstrates a 405F/g increased capacity at a current density of 1 A/g. The asymmetric supercapacitor (K 0.35 MnO 2 /AC) that was manufactured exhibits a capacitance of 106.4F/g when operating at 1 A/g, while maintaining a maximum energy density of 71.5 Wh kg −1 and a power density of 672 W kg −1 . Furthermore, 92.7 % of the initial capacitance of the device is retained even after 8,000 cycles at 20 A/g. This study presents novel insights into the production of defective materials for energy storage applications through the utilization of a one-pot process as opposed to the multi-step method. In order to produce high-performance supercapacitors for practical applications, the results indicate that defect engineering is a crucial factor.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
危险品化学品经营许可证（带存储）