JOURNAL OF CHEMICAL THERMODYNAMICS
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2014
·
IF 2.423
Rongrong Li,Hao Chen,Huayue Zhu,Ru Jiang,Stephen Louis Romano,Xiaoying Chen,Deman Han
The equilibrium solubility of sodium 2-naphthalenesulfonate in binary (sodium chloride + water), (sodium sulfate + water), and (ethanol + water) solvent mixtures was measured at elevated temperatures from (278.15 to 323.15) K using a steady-state method. With increasing temperatures, the solubility increases in aqueous solvent mixtures. The results of these results were regressed by a modified Apelblat equation. The dissolution entropy and enthalpy determined using the method of the least-squares and the change of Gibbs free energy calculated with the values of Δ diff S o and Δ diff H o at T = 278.15 K.
研究领域:
物理化学
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热力学
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溶液化学
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化学工程
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高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2026
·
IF 2.1
Jiazuo Wei,Bowen Tan,Bolun Yang,Jingjun Liu
To identify suitable extractants for extractive enhanced glycerol-CO2 carbonylation, liquid–liquid equilibrium data were determined for glycerol–glycerol carbonate systems with 2-pentanone, cyclohexanone, and 4-methyl-2-pentanone at 423.2, 433.2, and 443.2 K under a pressure of 1.5 MPa. The efficacy of the three extractants in the extraction of glycerol carbonate from glycerol was evaluated using distribution coefficients and extractive selectivity. Among the extractants, cyclohexanone possessed the highest distribution coefficient (>1) and superior extraction capability, while 4-methyl-2-pentanone exhibited the best selectivity for glycerol carbonate over glycerol. The liquid–liquid equilibrium data were then correlated using the Non-Random Two-Liquid (NRTL) model, and the corresponding binary interaction parameters were determined. The regressed parameters effectively reproduced the phase equilibrium trends observed for all studied systems. This work provides fundamental data and parameters for the selection of extractant to enhance the glycerol-CO2 carbonylation through extractive reactions as well as for subsequent process development and optimization for the carbonylation.
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高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2016
·
IF 1.835
Kai Kang,Xiaopo Wang,Fuxin Yang,John M. Prausnitz
Experimental density data are reported for diethylene glycol monobutyl ether, diethylene glycol dibutyl ether, and ethylene glycol monobutyl ether from (283.15 to 363.15) K at pressures up to 60 MPa using a vibrating-tube densimeter. Relative uncertainties of density measurements are 0.001 with confidence level 0.95. The experimental data were fitted with a Tait-like equation; average relative deviations were 0.017% for diethylene glycol monobutyl ether, 0.015% for diethylene glycol dibutyl ether, and 0.019% for ethylene glycol monobutyl ether. The isobaric thermal expansivity and the isothermal compressibility were derived from the Tait-like equation.
研究领域:
物理化学
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流体性质研究
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高压物性分析
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化工热力学
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高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
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2022
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IF 3.269
Lingyan Gui,Dongdong Li,Jiangtao Wu,Xianyang Meng
The apparent molar heat capacities of LiBO 2 (aq), NaBO 2 (aq), KBO 2 (aq), Na 2 B 4 O 7 (aq) and K 2 B 4 O 7 (aq) solutions at molalities from 0.01 to 2.6 mol·kg −1 , and at temperatures T = (298.12, 313.13 and 328.14) K have been determined using a Picker flow calorimeter built in this work. Further, the standard heat capacities of these solutes were derived from the experimental data by extrapolation to infinite dilution using the Pitzer ion-interaction model. The group contribution method is used to calculate the standard molar heat capacities of tetraborate ion in three equilibria for different assumptions, among which the prediction on the assumption that the standard molar heat capacity of reaction for the association reaction is zero is the most reasonable, and the results are in good agreement with the experimental data.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2022
·
IF 3.119
Shaohua Lv,Yun Hao,Bohao Yang,Linghong Tang
In this article, a calorimeter was established on the basis of steady-flow calorimetry. The present calorimeter was utilized to measure the isobaric heat capacity (cp) of target fluids. First, water was measured to verify the reliability of the experimental system. Then the measurements of cp for methyl hexanoate and ethyl hexanoate were carried out at temperatures from 313 K to 433 K and pressures of up to 10 MPa. To implement easier industrial application, a correlation was proposed on the basis of the experimental data to calculate the cp values of methyl hexanoate and ethyl hexanoate, with maximum absolute relative deviations of 0.77% and 0.65%, respectively. The newly reported data will be helpful for use with methyl hexanoate and ethyl hexanoate.
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JOURNAL OF MOLECULAR LIQUIDS
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2022
·
IF 6.633
Hui Lu,Xiaoran Li,Feng Li,Xiuquan Xu,Rong Zhao,Chenyi Xiong,Qing Hu,Zhuoqing Miao,Miao Tian
Photocatalytic technique has been widely accepted as a promising and effective candidate for eliminating antibiotic and pathogen pollutants in aquatic environment. Herein, a novel O, K co-doped g-C 3 N 4 photocatalyst embedded with single-atom Ag (denoted as Ag/OKCN) was successfully constructed to achieve the enhanced photocatalytic degradation and disinfection efficiency under visible light irradiation. The optimal Ag/OKCN-6 could eliminate 80.4 % of tetracycline (TC) within 60 min with a rate constant of 0.0259 min −1 , which was 4.98 times of pristine g-C 3 N 4 . Meanwhile, Ag/OKCN-6 could also completely inactivate>7-log CFU·mL −1 of Escherichia coli ( E. coli ) by efficient disruption of cell membranes. The synergistic effect of O, K co-doping and single-atom Ag embedding contributed to an extended light response, preeminent separation and transfer of photoexcited charges, prolonged carrier lifetime as well as ameliorative hydrophilicity, which was conducive to the excellent photocatalytic performance. Radical trapping and electron spin resonance (ESR) experiments validated that superoxide radicals ( • O 2 − ) were crucially responsible for the superior photocatalytic activity. This work provides a facile route to construct multi-strategy modified g-C 3 N 4 -related photocatalysts for efficiently eliminating aquatic environmental pollutants.
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JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2020
·
IF 2.369
Xiaomei Qin,Yapei Chen,Shihao Yang,Xiaoyun Qin,Jianbo Zhao,Wenjun Fang
Measurements on densities, viscosities, and refractive indices at atmospheric pressure for binary mixtures of 1,3-dimethyladamantane (1,3-DMA), 1,3,5-trimethyladamantane (1,3,5-TMA), and 1-ethyladamantane (1-EA) with n-nonane or n-undecane are carried out over the whole composition range at temperatures T = 293.15–343.15 K and atmospheric pressure. The excess molar volume (VmE), deviation in viscosity (Δη), deviation in refractive index (ΔnD), and deviation in molar refraction (ΔR) for the six mixtures are calculated and then fitted to the Redlich–Kister polynomial. The VmE values are all negative over the entire range of mole fractions and decrease with increasing temperature for the six binary systems. The absolute values of Δη for the mixtures decrease obviously with increasing temperature. The ΔnD values with the volume fraction for the six systems are all positive over the entire composition range. Density, viscosities, and refractive index of the six systems are correlated by the Jouyban–Acree model. The experimental results could be useful for the development of high-energy-density hydrocarbon fuels.
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高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
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2014
·
IF 2.423
Rongrong Li,Anguo Ying,Guobo Huang,Chenghong Li,Dan Chen,Jia Zhao
The solubility of sodium 3-sulfobenzoate in binary (sodium chloride + water), (sodium sulfate + water), and (ethanol + water) solvent mixtures was measured at elevated temperatures from (278.15 to 323.15) K by a steady-state method. The results of these experiments were correlated by a modified Apelblat equation. The dissolution enthalpy and entropy of sodium 3-sulfobenzoate in aqueous solutions of different mole fraction were obtained.
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高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
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2016
·
IF 2.196
Xiong Zheng,Ying Zhang,Maogang He,Lili Liang,Xinxin He
Fatty acid ethyl esters (FAEEs) are the main components in some biodiesels, which are important alternatives of fossil fuels. In this paper, we carry out the measurements of the speed of sound in two FAEEs at the temperatures from (293.15 to 473.15) K and at the pressures up to 10 MPa, including saturated liquid and compressed liquid. The relative expanded uncertainty in the speed of sound is estimated to be less than 1.0% with coverage factor of k to be 2. The data in saturated liquid and compressed liquid are fitted into polynomials. For saturated liquid, the D AAD is 0.16% for ethyl hexanoate and 0.09% for ethyl octanoate. For compressed liquid, the D AAD is 0.31% for ethyl hexanoate and 0.16% for ethyl octanoate. The data were also used to assess the predictive ability of Wada’s model.
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高影响因子
Journal of Materials Chemistry C
·
2016
·Vol. 4
·期 15
·3175-3184
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IF 5.066
Chunxi Xu,Li Yuan,Guozheng Liang,Aijuan Gu
Sustainability urgently asks for low dielectric loss and a low percolation threshold (fc) while developing high dielectric constant (Hi-k) conductor/polymer composites. In this work, a novel hybridized graphene (PIL–TrGO) was first reported using a two-step process, including the decoration of an epoxy functionalized ionic liquid (IL) on the surface of thermally reduced graphene oxide (TrGO) through πcation–π interaction, followed by in situ polymerization of the IL. The DC conductivity of the PIL–TrGO hybrid is as good as that of TrGO. Then, different loadings of PIL–TrGO were added into cyanate ester (CE) to prepare a series of composites; the TrGO/CE composites were also prepared for comparison. Different from TrGO, the PIL has a large amount of epoxy groups, which guarantees good dispersion of the hybridized graphene in CE matrix, and thus provides the base for transferring the outstanding electrical properties of graphene to the composites. When the loading of fillers approaches the percolation threshold (fc), the dielectric constant and loss at 100 Hz of PIL–TrGO/CE composites are about 13 and 0.57 times that of TrGO/CE composites, respectively, while the fc of PIL–TrGO/CE composites is still as low as 0.94 wt%. The dielectric mechanism was studied by discussing and simulating impedance spectra, and the results show that PIL–TrGO/CE composites possess more micro-capacitor structures than TrGO/CE composites; moreover, the cation–anion charge layers on TrGO surfaces enhance the Maxwell–Wagner–Sillars polarization between PIL–TrGO hybrid and the CE matrix, and then markedly increase the dielectric constant of composites. PILs coated on graphene surfaces act as electron insulative layers and thus decrease dielectric loss induced by the leakage current between conductive carbon layers.
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JOURNAL OF PHARMACY AND PHARMACOLOGY
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2016
·Vol. 68
·期 9
·1109-1118
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IF 2.363
Yang Lei,Xin Jin,Zhang Zhenhai,Yan Hongmei,Wang Jing,Sun E,Hou Jian,Jia Xiaobin,Lv Huixia
ObjectiveThis work aimed at preparing ginsenoside compound K (GCK)-loaded liposomes modified with TPGS (GCKT-liposomes) to enhance solubility and targeting capability of GCK, as well as inhibit the efflux of GCK from tumour cells.MethodsGCKT-liposomes were prepared by the thin-film hydration method and characterized by particle size, polydispersity, zeta potential and drug encapsulation efficiency. A549 cells were used as antitumour cell model to access the cellular uptake of the GCK and perform its antitumour function. The enhancement of in vivo antitumour efficacy of GCKT-liposomes was evaluated by nude mice bearing tumour model.Key findingsThe results showed that GCKT-liposomes achieved a comparatively high drug loading efficiency and reasonable particle size at the ratio of 7 : 3 (phospholipid: TPGS). The in vitro release demonstrated that the dissolution of GCK was remarkably improved by entrapping it into liposomes. In addition, GCKT-liposomes exhibited a great hypersensitizing effect on A549 cells, and the cellular uptake was enhanced. Compared with free GCK, the IC50 of GCKT-liposomes was significantly reduced (16.3 ± 0.8 vs 24.9 ± 1.0 μg/ml). In vivo antitumour assay also indicated that GCKT-liposomes achieved higher antitumour efficacy (67.5 ± 0.5 vs 40.8 ± 0.7%).ConclusionThe novel GCKT-liposomes significantly improved the antitumour efficacy of GCK.
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PubMed
高影响因子
RSC Advances
·
2016
·Vol. 6
·期 55
·50173-50179
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IF 3.289
Song Li,Song Ye,Tianhua Liu,Zhuang Guo,Huiyun Wang,Deping Wang
ZnO quantum dots (QDs) with tunable size and photoluminescence can be achieved simply by controlling their growth during the sol–gel synthesis process. However, the role of alkali metal hydroxide MOH (M = Li, Na or K) as the reactant in the growth of ZnO QDs is still controversial. In this work, we carried out a comprehensive study on the growth of ZnO QDs by using different types of MOH as the reactant under different reaction temperatures and in different solvents. The results reveal that the growth of ZnO QDs is considerably governed by MOH through the co-effect of OH− and M+ ions, which can facilitate and hinder the growth, respectively. Further investigations suggest that the hindering effect caused by M+ cations is strongly dependent on the amount of OH− anions around the ZnO QD surface and follows the trend of Li+ > Na+ > K+. Moreover, the dual role of the reactant MOH can also be confirmed when altering reaction temperature and solvent. The photoluminescence of ZnO QDs shows size-dependence and can be easily tuned over a wide range from purple to yellow via adjusting the reaction parameters. This research establishes a fundamental understanding on the growth of ZnO QDs from the role of the reactant MOH point of view, which may benefit the controllable growth of ZnO QDs.
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