JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2024
·
IF 2
Honglin Xu,Yongsheng Deng,Xinyu Wang,Ruilin Wang
The stable phase equilibrium of the ternary system NaVO3–KVO3–H2O at 298.15 K was investigated using the isothermal solution equilibrium method and the Schreinemaker wet residue method. The equilibrium liquid phase solubility data and physical property data [density (ρ), refractive index (nD), pH] were determined, and X-ray diffraction was utilized to verify the material composition of the equilibrium solid phase. Phase diagrams and physical property–composition diagrams were constructed based on the equilibrium solubility data and physical property data. The results show that the ternary system has a complex salt generation process with two invariant points, three univariate curves, and three crystalline phase regions corresponding to NaVO3·2H2O, KVO3, and Na2mKn(VO3)2m+n, respectively. The solid phase precipitated from a saturated NaVO3 solution at 298.15 K is NaVO3·2H2O, as confirmed by a comparison of experimental results and the literature. The chemical composition of the complex salt generated from the NaVO3–KVO3–H2O ternary system follows the general formula of the Na2mKn(VO3)2m+n complex salt proposed by Druzynski’s group, thereby validating the reliability of the present experiment. This study provides new experimental data for the preparation and separation of metavanadate.
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Materials Today Bio
·
2025
·
IF 10.2
Wenyi Hou,Zhaoyi Lin,Xinling Chen,Yu Sun,Yao Lin,Mengran Peng,Feng Zhou,Huamin Jiang,Yan Li,Yue Zheng
There have been various interventions for photoaging skin, such as retinoic acid treatment and laser therapy. However, more precise, secure, and effective technologies and materials were still need to be explored. Cathepsin D (CTSD) repairs the epidermal barrier in chronic photodamaged skin through increasing TGase-1 expression and activity. Cathepsin K (CTSK) affects the metabolism of skin elastic fibers. Therefore, gelatin/alginate composite hydrogel microspheres loaded with CTSD or CTSK were fabricated. The microspheres with an average size of 79.8 ± 30.4 μm were stable in PBS (pH 7.4) for 5 days and then disintegrated in vitro . 0.1 mg/mL of microspheres continuously released 12-13 ng/mL CTSD or CTSK for the first three consecutive days. In vivo , the microspheres were almost completed degraded on day 7 after the subcutaneous injection. The biosafety and efficacy of CTSD- and CTSK- microspheres were confirmed in vitro and in vivo . They reduced ROS and inhibited the degradation of skin collagen and elastic fibers by upregulating Nrf2 and downregulating MMP-1 and MMP-3, which reversed photodamage of skin induced by UV. In conclusion, the gelatin/alginate composite microspheres loaded with CTSD or CTSK showed a great potential for chronic photodamaged skin.
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PubMed
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MICROCHEMICAL JOURNAL
·
2025
·
IF 5.1
Cancan Yang,Chongyue Bai,Xiaoting Chen,Hamdy Khamees Thabet,Saad Alshammari,Yunlong Sun,Jiongru Li,Juanna Ren,Hassan Algadi,Xiangzheng Hu,Faming Gao,Dapeng Cui,Zhanhu Guo,Huige Wei
The increasing utilization of hyodeoxycholic acid (HDCA) additives in animal feed has created a pressing need for reliable detection methods. This study presents a novel non-enzymatic electrochemical platform for specific detection of HDCA using liquid nanocomposites from potassium-coordinated cyclodextrin metal-organic frameworks (K-CD-MOFs) immobilized on reduced graphene oxide (rGO) substrates. Employing neutral red (NR) as the probe, rGO-K-CD-MOFs@NR exhibits outstanding sensing performance with a wide linear detection range (5.0–100.0 μM), a high sensitivity (0.10 μA·μM −1 ), and low detection limit (1.97 μM, S/N = 3). The sensor also demonstrates exceptional selectivity for HDCA and maintains stable performance for six months under low-temperature storage conditions. The excellent performance originates from the synergistic effect between rGO's excellent electron transfer capability and K-CD-MOFs' unique host-guest recognition properties. This work not only provides an effective solution for HDCA monitoring in feed products but also offers a promising strategy for developing advanced electrochemical sensors for food safety and quality control applications in the animal husbandry industry.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Wang Boxuan,Bao Qiang,Chen Zhirui,Qiao Xue,Hu Yunfeng,Zhang Jian,Liang Dan,Sun Penglai,Xia Haiyue,Wang Xiangyang
Zeolite RHO, a microporous zeolite, has the great possibility for N 2 /CH 4 separation by regulating the size of the eight-membered ring window on the RHO framework. In this work, the ability of ion-exchanged RHO zeolites for N 2 /CH 4 separation is investigated, and a highly nitrogen selectivity adsorbents are developed. RHO samples were prepared by hydrothermal synthesis. Alkali metal cations (Na + , K + , Cs + ) was used for ion exchange. Adsorption equilibrium isotherms of N 2 and CH 4 were measured at normal temperature and fitted by the Langmuir equation. The adsorbent selection parameters ( S parameters) were calculated based on the working capacity and equilibrium selectivity of N 2 /CH 4 , which are used to comprehensively evaluate the selectivity of N 2 /CH 4 . The results indicate that the cations have effects on the regulation of the eight-membered ring window. In particularly, K-RHO no.2 sample which is obtained by ion exchange of K + cations exhibit the best N 2 /CH 4 separation performance, which is a potential nitrogen selective adsorbent. In addition, the product throughputs of RHO and the commercial adsorbent ETS-4 were compared by common PSA simulation process with essentially the same product purity and recovery. The results show that K-RHO no.2 has 36 % higher product throughput than ETS-4, which can compensate for the problem of low N 2 working capacity of ETS-4 in industrial application.
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CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Lingyu Jia,Tingting Yang,Zixu Chen,Xingqi Liao,Peigang He,Dechang Jia,Xiaoming Duan,Zhihua Yang,Yu Zhou
In this work, we utilized an in-situ chemical synthesis method to fabricate a Fe 3 O 4 /K-geopolymer (KGP) composite to be applied in a microwave absorbent field. This material, as a type of ceramic precursor, is highly expected to be a 3D printing material to prepare microwave absorbing components with complex shapes. The investigation results demonstrate that the material possesses a large effective microwave absorbing bandwidth of 3.7 GHz with the minimum reflection loss reducing to −12.2 dB when the generated Fe 3 O 4 percent reaches 12 wt% in the KGP composite. This microwave absorbent performance can be attributed to a synergistic effect between the eddy current loss caused by the improved electrical conductivity of magnetic nanoparticles and the interfacial polarization effect from the geopolymer matrix and magnetic medium interface. Also, we used direct ink writing technology to print two-dimensional components with desirable patterns. Thickness-dependent wave absorption evaluation results confirmed a maximum reflection loss of −25.9 dB at 15.2 Hz was obtained from the printed sample containing 9.0 wt% Fe 3 O 4 for a layer thickness of 10 mm, indicating that wave consumption effectiveness was determined by porous microstructures, magnetic loss of Fe 3 O 4 nanoparticles as well as suitable impedance matching. The preparation method and synthesized material pave the way for integrated manufacturing of 3D printing components with microwave absorbing performance.
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Nature Communications
·
2022
·Vol. 13
·期 1
·1-13
·
IF 17.694
Li Siwu,Zhu Haolin,Liu Yuan,Han Zhilong,Peng Linfeng,Li Shuping,Yu Chuang,Cheng Shijie,Xie Jia
Potassium metal is an appealing alternative to lithium as an alkali metal anode for future electrochemical energy storage systems. However, the use of potassium metal is hindered by the growth of unfavourable deposition (e.g., dendrites) and volume changes upon cycling. To circumvent these issues, we propose the synthesis and application of nitrogen and zinc codoped porous carbon nanofibres that act as potassium metal hosts. This carbonaceous porous material enables rapid potassium infusion (e.g., < 1 s cm −2 ) with a high potassium content (e.g., 97 wt. %) and low potassium nucleation overpotential (e.g., 15 mV at 0.5 mA cm −2 ). Experimental and theoretical measurements and analyses demonstrate that the carbon nanofibres induce uniform potassium deposition within its porous network and facilitate a dendrite-free morphology during asymmetric and symmetric cell cycling. Interestingly, when the potassium-infused carbon material is tested as an active negative electrode material in combination with a sulfur-based positive electrode and a nonaqueous electrolyte solution in the coin cell configuration, an average discharge voltage of approximately 1.6 V and a discharge capacity of approximately 470 mA h g −1 after 600 cycles at 500 mA g −1 and 25 °C are achieved.
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PubMed
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2023
·
IF 2.6
Yanjuan Zhang,Yadong Ning,Caixia Lv,Zhihui Yu,Yu Wang,Guangye Wei,Jingkui Qu
For efficient nickel recovery from laterite nickel ore, an improved understanding of the solubility in ternary MgCl2–NiCl2–H2O systems is required. Herein, the stable phase equilibria in a ternary MgCl2–NiCl2–H2O system at 303, 313, and 323 K were studied using an isothermal dissolution equilibrium method. For this ternary system, the solubility and density were measured at different temperatures. The equilibrium solid phases were identified using X-ray diffraction, combined with the Schreinemakers’ method for wet residues. Based on the solubility data, the phase diagrams of the MgCl2–NiCl2–H2O system at 303, 313, and 323 K were plotted. At all investigated temperatures, the phase diagrams of this ternary system presented an invariant point, two isothermal dissolution curves, and three crystallization regions. Neither double salt nor solid solution was produced. The Mixed Solvent Electrolyte (MSE) model was applied to calculate the solubility for this ternary system. According to the comparison of phase diagram, the calculated data were in good agreement with the experimental values.
研究领域:
化学工程
·
材料科学
·
物理化学
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JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
·
2023
·
IF 4
Huijian Ye,Mengyao Ping,Wenxian Liu,Lixin Xu
Polymer films with tailored dielectric properties and large electrical displacement are required for applications in microelectronics due to the need for ultrahigh speed and low transmission delays. In this study, we developed a low- k polyimide (PI) nanocomposite incorporated with metal–organic framework hollow ZIF-8 (HZIF-8) nanocrystals to achieve a high energy storage capacity. The PI nanocomposite film was prepared by solution casting a mixture of HZIF-8/polyamide acid with thermal imidization. A dielectric constant of 2.26 was obtained at 100 Hz for the 5 wt% nanocomposite with a multi-stage pore architecture. Due to improved interfacial polarization, the 1 wt% nanocomposite had a high energy density of 12.2 J/cm 3 and a charge–discharge efficiency of 70% at 600 MV/m. The PI nanocomposite film exhibited dielectric reliability with inherent flexible performance, and it is expected to be a primary candidate for polymer dielectric applications in microelectronics.
研究领域:
材料科学
·
微电子学
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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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JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
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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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
·
分子生物学
·
细胞生物学
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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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