JOURNAL OF CHEMICAL THERMODYNAMICS
·
2020
·
IF 2.888
Lele Chen,Xiuxiu Yang,Yafei Guo,Tianlong Deng,Dan Li,Lingzong Meng
The solubility corresponding solution physicochemical properties (densities, refractive indices and pH) in the quaternary system (NaCl + NaBO 2 + Na 2 B 4 O 7 + H 2 O) were investigated at 298.15 K by the isothermal dissolution equilibrium method. The dry-salt phase diagram, water content diagram, refractive index diagram and pH diagram were drawn. There are four crystallization fields corresponding to NaCl, NaBO 2 ·4H 2 O, Na 2 B 4 O 7 ·10H 2 O, NaCl·NaBO 2 ·2H 2 O, five univariant curves and two invariant points in the phase diagram of the quaternary system. The solubility, concentrations of boron species B(OH) 3 , B(OH) 4 − , B 3 O 3 (OH) 4 − , B 4 O 5 (OH) 4 2− and OH − in the system were calculated using the Pitzer model. The variation trends for calculated solubility curves and pH curves are consistent with the experimental results. The distributions of different boron species were obtained in the mixed borate solution. The distributions of four boron species were obtained in the mixed borate solution. The main boron species in the mixed borate solution are B(OH) 4 − and B 4 O 5 (OH) 4 2− . The mole fractions of the four boron species are mainly affected by m (B) in the solution but less by m (Cl − ).
研究领域:
化学热力学
·
无机化学
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DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2020
·
IF 2.369
Hongxia Li,Lijiang Guo
The solubility and phase diagram of the CsCl–MgCl2–H2O ternary system, at a relatively wide temperature range, are significantly important for the extraction of the cesium resources from salt lakes. The isothermal dissolve equilibrium (IDE) method was used to determine the solubility of this ternary system at T = 273.15, 308.15, and 348.15 K, which have not been reported yet. The measured results indicated that the equilibrium solid phases in this ternary system from T = 273.15 to 348.15 K are CsCl, double salt CsCl·MgCl2·6H2O, and MgCl2·6H2O, and correspondingly there are three crystal regions and two cosaturated points for these solid phases. The solubility of the salt increased with the increase of the temperature, and the double salt CsCl·MgCl2·6H2O and CsCl crystal regions also became larger with the increasing temperature. However, the crystal regions of the MgCl2·6H2O solid phase are not enlarged obviously. Based on the solubility and phase diagram of CsCl–MgCl2–H2O at different temperatures, the separation process of CsCl resources has been proposed.
研究领域:
化学
·
材料科学
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高影响因子
JOURNAL OF SOLUTION CHEMISTRY
·
2025
·Vol. 55
·期 3
·366-381
·
IF 1.3
Zhou Jinpeng,Du Yanping,Xie Peijing,Liu Bin,Xue Ning,Hou Haiyun,Wang Ning,Zheng Lina
The thermodynamic properties of electrolyte solutions elucidate the mechanisms of ionic interactions in solution. This study investigates the thermodynamic properties of the ternary systems containing cesium bromide (CsBr), water, and either 1,2-butanediol (1,2-BDO) or 1,4-butanediol (1,4-BDO) at 298.2 K utilizing potentiometric techniques. CsBr molalities were in the approximate range of 0.01 to 1 mol·kg −1 , and the mass fraction of 1,2-BDO/1,4-BDO in 1,2-BDO/1,4-BDO+H 2 O binary mixed solvents were 0, 0.10, 0.20, and 0.30. The Debye-Hückel model, the Pitzer model, along with the Nernst equation were explored to determine the thermodynamic parameters, which included the mean ionic activity coefficients ( γ ± ), osmotic coefficients ( φ ), excess Gibbs free energy ( G E ), standard Gibbs free energy of transference (Δ G
0 t
), and primary hydration number ( n hydr ). The results reveal that the γ ± of CsBr decreases with increasing the molality of CsBr and with increasing the mass fraction of 1,2-BDO and 1,4-BDO in the binary mixture. A positive value for the Δ G
0 t
signifies that the transfer of CsBr from pure water to the mixed solvent system is thermodynamically unfavorable and thus non-spontaneous. These findings can provide thermodynamic data to support potential industrial processes.
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ACS Applied Nano Materials
·
2026
·Vol. 9
·期 33
·15886-15898
·
IF 5.8
Qi Yexiong,Zhao Zimeng,Chen Li,Li Tingting,Lin Ligang,Zhou Zena,Zheng Yong
The all-textile piezoelectric sensor,
capable of achieving
high-sensitivity
pressure sensing while meeting the requirements of wearability, comfort,
and structural flexibility, holds great significance for intelligent
wearable motion monitoring. In this study, MXene was employed to induce
the transition of polyacrylonitrile (PAN) molecular chains from a
3 1 helical conformation to a planar zigzag conformation,
which significantly enhanced the piezoelectric output performance.
Under an impulse force of 7 N at 1 Hz, the sensor exhibited an output
voltage of 34.1 V, with a sensitivity of 1.51 V/N over the range of
1–9 N. The silver-based knitted fabric electrode (silver-knitted
fabric) was knitted on a computerized flat-knitting machine, fully
leveraging the advantages of the knitted electrode, including high
conductivity (resistance of only 4.2 Ω), high air permeability
(1235 mm/s), and excellent structural flexibility. The electrospun
MXene/PAN/K-BTO composite nanofiber membrane was subsequently integrated
with the silver-based knitted fabric electrode to construct an all-textile
flexible piezoelectric sensor with a three-layer sandwich structure.
After 2000 consecutive impact cycles, the sensor output signal remained
stable without any attenuation. The sensor accurately identified various
human motion patterns, including finger bending (approximately 0.08
V), elbow flexion and extension, and walking gait (approximately 18.1
V). Owing to its excellent skin adherence and high sensitivity to
subtle movements, this sensor provides an effective monitoring tool
for intensive care and consciousness recovery assessment. Furthermore,
it holds promising potential for applications in sports health monitoring
and human–computer interaction, offering solutions for next-generation
embodied intelligence and personalized health monitoring systems.
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高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Yongyi Li,Wei Li,Zhigang Shao,Huiyang Xu,Shuanglong Li,Bo Wang,Xiaorui Huang,Shichao Jiao,Zhiwei Li
Photocatalytic production of hydrogen peroxide from water is regarded as an environmentally benign technology for energy storage and supply. Herein, a disordered K&Na-C 3 N 5 photocatalyst co-intercalated with K + &Na + and modified by cyano/hydroxyl groups is successfully fabricated via alkali-activated thermal-polymerization. Alkali activation effectively anchors cyano and hydroxyl active groups on the surface: hydroxyl groups enhance the material's hydrophilicity and promote proton transfer, while cyano groups exhibit electron-attracting characteristics to localize photogenerated electrons. Simultaneously, interlayer intercalation of K + &Na + forms electron transport channels, synergistically facilitating surface proton transfer and optimizing charge distribution. This multi-component modification strategy significantly enhances the adsorption capacity of O 2 , effectively modulates the 2e − ORR pathway, and improves the selectivity of H 2 O 2 , demonstrating its excellent bifunctional properties. Experimental data show that the optimally alkali-activated K 3 &Na 3 -C 3 N 5 achieves a remarkably high H 2 O 2 production rate of 26,920.49 μmol g −1 ·h −1 — a 90.3-fold increase over unmodified C 3 N 5 . This work pioneers alkali activation as a universal and scalable paradigm for engineering surface-active sites to enable performance amplification through functional group-metal ion cooperativity, and it provides a design blueprint for advanced carbon nitride-based photocatalysts to boost H 2 O 2 fuel cell performance.
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Journal of Materials Chemistry C
·
2019
·Vol. 7
·期 30
·9203-9210
·
IF 6.641
Y. Y. Zhou,E. H. Song,M. G. Brik,Y. J. Wang,T. Hu,Z. G. Xia,Q. Y. Zhang
Mn4+-doped fluoride red-emitting phosphors have been developed for backlighting white light-emitting diodes (WLEDs). However, the long fluorescence lifetime (τ > 5 ms) leads to the image-retention phenomenon for the human eye when Mn4+ is doped into equivalent X sites in A2XF6 (A = Na, K, Rb, Cs; X = Si, Ge, Ti, Zr). Herein, we report on novel red-emitting A2NaScF6:Mn4+ (A = K, Rb, Cs) (ANSF) phosphors with short fluorescence lifetimes (τ < 4 ms) and characteristic zero phonon line (ZPL) emission, which can be realized via non-equivalent doping of Mn4+ into Sc3+ sites. Density functional theory (DFT) calculations verified the formation of a slightly distorted environment of Mn4+ and an Na+ vacancy to balance the charge with Mn4+ non-equivalent doping. The WLED backlight using ANSF as a red-light component can reach a wide color gamut above 105% of the National Television Standards Committee (NTSC) standard, and the image-retention on the backlighted screen can be effectively avoided compared to the backlight obtained using commercial K2SiF6:Mn4+. Such a Mn4+ non-equivalent doping strategy opens a new perspective for the modification of local symmetry and enhancement of the luminescence properties of Mn4+-doped red-emitting fluoride phosphors.
研究领域:
材料科学
·
光学工程
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高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2020
·
IF 5.065
Shuai Yu,Xiaoxuan Xu,Wenguo Xing,Fumin Xue,Yan Cheng
The solubility of gliclazide in seventeen pure solvents, i.e. methanol, ethanol, n-propanol, i-propanol, n-butanol, i-butanol, s-butanol, acetone, cyclohexanone , ethyl formate , methyl acetate , ethyl acetate , acetonitrile , tetrahydrofuran , N , N -dimethylformamide, chloroform and toluene was determined using a gravimetric method over a temperature range from 278.15 to 318.15 K at atmospheric pressure. The obtained solubility was corrected by the modified Apelblat equation, λh equation, non-random two-liquid (NRTL) equation, and the Wilson equation. The mixing properties, such as the dissolution Gibbs energy , enthalpy and entropy of gliclazide, were calculated based on the Wilson equation. The solubility data, thermodynamic parameters and dissolution properties would be useful for the development and optimization of the crystallization processes for gliclazide in industry.
研究领域:
药物化学
·
物理化学
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DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2026
·
IF 2.4
Hengli Ning,Hanyu Zheng,Yuqi Wang,Sisi Zhang,Long Li,Tong Pan,Yafei Guo,Tianlong Deng
Salt lakes are rich in boron, magnesium, potassium, lithium, and other elements of considerable industrial significance. Boron serves as a crucial tracer for investigating geological processes due to its high incompatibility and solubility. However, boron tends to form complex borates with other elements in salt lakes such as magnesium borates. The excessive accumulation of boron in brine, coupled with the phase transition of magnesium borate that releases boron, complicates the study of the boron cycle and contributes to environmental pollution. Therefore, investigating the phase transitions of borates and identifying stable solid phases at various temperatures are crucial for enhancing our understanding of the boron cycle and mitigating pollution in salt lakes. This paper investigated Mg2B6O11–H2O (308.15, 323.15 K) and Mg2B6O11–MgSO4 (5, 10, 20 and 30%)–H2O (308.15 K) systems via isothermal dissolution equilibrium, thermogravimetry, and X-ray diffraction. At 308.15 K, Mg2B6O11–H2O began converting to pinnoite at 237 h, reaching equilibrium at 1000 h; at 323.15 K, conversion started at 33.5 h and finished within 170 h. In MgSO4 solutions (5–30%), inderite remained stable for 68–94 days without transformation.
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产品关联
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高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2020
·
IF 2.369
Ningning Tian,Changyou Yu,Shichao Du,Bo Lin,Ye Gao,Zhenguo Gao
The solid–liquid equilibrium solubility of isatoic anhydride in 12 pure solvents (methanol, ethanol, 1-propanol, isopropyl alcohol, methyl acetate, ethyl acetate, propyl acetate, isopropyl acetate, acetone, 2-butanone, acetonitrile, and 1,4-dioxane) at T = 288.15 to 328.15 K was measured by the gravimetric method under atmospheric pressure. Experimental results demonstrate that the mole fraction solubility of isatoic anhydride in these selected solvents increased with the increase of temperature, and the dissolution behavior is affected by multiple factors like polarity, H-bond interaction, cohesive energy density, etc. The modified Apelblat model, the van’t Hoff model, the nonrandom two-liquid model, and the λh model were used to correlate the experimental solubility data. The maximum values of the relative average deviation and root-mean-square deviation were no more than 4.23 × 10–2 and 5.31 × 10–4, respectively. Furthermore, the thermodynamic properties including the mixing Gibbs energy, mixing enthalpy, and mixing entropy were calculated, which indicates that the dissolution of isatoic anhydride was a spontaneous and entropy-favorable process.
研究领域:
化学工程
·
物理化学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Fuyu Li,Ziwei Li,Cuiping Wang,Hongwen Sun,Xuejiao Tang
The persistent accumulation of micro/nanoplastics (MNPs) in aquatic environments necessitates the development of efficient remediation technologies. Conventional biochar adsorbents face challenges including slow kinetics and poor adaptability in complex matrices. Herein, a magnetic sludge-derived biochar (MSDB) co-loaded with Fe₃O₄ and zero-valent iron was synthesized via a one-pot K₂FeO₄-assisted activation–magnetization pyrolysis of deashed sludge-derived biochar at 800 °C, where K₂FeO₄ served as the single additive to enable in-situ formation of Fe₃O₄/ZVI while promoting pore development, yielding a highly porous structure with a specific surface area of 123.58 m 2 ·g −1 . The MSDB exhibited exceptional performance for removing polystyrene microplastics (PSMPs, 0.1–1 μm), achieving a Langmuir model-fitted apparent maximum adsorption capacity (Q₀) of 440.24 mg·g −1 and rapid kinetics, thereby demonstrating its efficacy for polydisperse MP fractions commonly found in the environment. Multimodal characterization revealed synergistic adsorption mechanisms, including physical entrapment, π-π stacking, hydrophobic interactions, and weak interfacial electron redistribution. The MSDB maintained robust removal efficiency across a wide pH range (3−11) and in the presence of coexisting ions, organic matter, and antibiotics (sulfamethoxazole, SMX). Notably, the presence of SMX induced synergistic heteroaggregation, further enhancing PSMP capture. The material also showed outstanding performance in real water samples (tap water: 99.17%; lake water: 89.22%; seawater: 85.78%). Furthermore, the material exhibited excellent recyclability, retaining 75.5% of its initial capacity after five cycles, while enabling facile magnetic separation due to its sustained saturation magnetization (19.77 emu·g −1 ). This work provides a sustainable strategy for valorizing sewage sludge into a high-efficiency, magnetically recoverable adsorbent for microplastic remediation, aligning with circular economy principles. Future research should focus on large-scale continuous-flow applications and pilot-scale testing to validate its efficacy in end-of-pipe wastewater treatment.
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高影响因子
Green Chemical Engineering
·
2026
·
IF 11.9
Jingjing Sun,Bo Chai,Haoren Chen,Suohe Yang,Guangxiang He,Shiyang Bai,Jihong Sun,Haibo Jin
Achieving the selective catalytic dimerization of the branched olefin via solid superbases remains a challenging yet sustainable strategy. In this study, a series of K/K 2 CO 3 solid superbase catalysts were rapidly prepared via the melt-loading method for the dimerization of isobutene (IBE) to 2,4,4-trimethyl-1-pentene (TP1). Carbonate vacancy concentration was readily tuned by regulating the pretreatment temperature of K 2 CO 3 . The screened 5%K/K 2 CO 3 -430°C catalyst, containing an appropriate amount of carbonate vacancies, achieved an isobutene conversion of 49.8% and a TP1 selectivity exceeding 80.9% under mild conditions (190 °C, 15 h), significantly outperforming conventional solid acid catalysts. Characterization results demonstrate that the carbonate vacancies (anion lattice defects) induced by optimal pretreatment temperature generate more coordinatively unsaturated oxygen (CUO) sites on the surface. These sites substantially strengthen the metal-support interaction (MSI, in a broad sense) between K and K 2 CO 3 , thereby enhancing the electron-donating ability of the superbasic sites. DFT calculations further reveal that the loaded metallic K promotes electron transfer to IBE through electron density redistribution and the semi-encapsulation configuration of K atoms in tri-oxygen hollow sites, enabling efficient activation of isobutene. In situ DRIFTS detects allylic anion intermediates, confirming that the reaction proceeds via a radical-anion pathway. This study provides a facile and effective approach for the efficient preparation of solid superbases and the construction of defect engineering in catalysts, offering new insights into the design of high-performance catalysts for green olefin conversion.
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高影响因子
Journal of Chemistry
·
2021
·Vol. 2021
·期 1
·4541213
·
IF 2.506
Zhenzhen Jiang,Chi Ma,Gaoling Liu,Kangrui Sun,Mingli Li,Yafei Guo,Lingzong Meng,Tianlong Deng
To effectively develop the rare earth elements resources from the geothermal waters, it is essential to understand the volumetric properties of the aqueous solution system to establish the relative thermodynamic model. In this study, densities of YCl 3 (aq) at the molalities of 0.08837–1.60639 mol·kg −1 from 283.15 K to 363.15 K at 5 K intervals and ambient pressure were measured experimentally by an Anton Paar digital vibrating-tube densimeter. Based on experimental data, the volumetric properties including apparent molar volume ( V ϕ ) and the coefficient of thermal expansion of the solution ( α ) of the binary systems (YCl 3 + H 2 O) were derived. The 3D diagram ( m i , T , V ϕ ) of apparent molar volumes against temperature and molality was plotted. On the basis of the Pitzer ion-interaction model of electrolyte, the Pitzer single-salt parameters ( , , and ) for YCl 3 and temperature-dependence equation F ( i , p , T ) = a 1 + a 2 ln(T/298.15) + a 3 (T-298.15) + a 4 /(620-T) + a 5 (T-227) as well as their coefficients a i ( i = 1–5) in the binary system were obtained for the first time. The values of Pitzer single-salt parameters of YCl 3 agree well with the calculated values corresponding to the temperature-dependence equations, indicating that single-salt parameters and temperature-dependent formula obtained in this work are reliable.
研究领域:
溶液化学
·
热力学
·
无机化学
·
稀土资源
·
地热化学
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DOI
高影响因子
危险品化学品经营许可证（带存储）