JOURNAL OF HAZARDOUS MATERIALS
·
2019
·
IF 7.65
Yali Guo,Xu Xing,Yanan Shang,Baoyu Gao,Lei Zhang,Qinyan Yue,Li Qian,Zihang Wang
To insight into the selective adsorption mechanism of fluoride in the bimetallic system, Fe-La or Al-La composites were comparatively embedded onto the cellulose/graphene hybrids (CG hybrids) to fabricate the Fe-La@CG hybrids or Al-La@CG hybrids for fluoride uptake with existing phosphate. The results showed that Al-La@CG hybrids were mainly in the amorphous nature, while Fe-La@CG hybrids have the identical diffraction peaks as compared with those of hydrated lanthanum oxides (HLO) and hydrated iron oxides (HFO). Fluoride capture by Al-La@CG and Fe-La@CG hybrids followed the similar tendencies with the pH altering, but the adsorption performance of Al-La@CG hybrids was better than that of Fe-La@CG hybrids at the same pH levels. Adsorption of fluoride onto Al-La@CG hybrids exhibited less sensitivity and high selectivity with existing phosphate as compared with that of Fe-La@CG hybrids, which further indicated that the Al-La@CG hybrids were more preferable for fluoride adsorption. The fraction areas of La-F and Al-F accounted for 79.1 % and 20.9%, which indicated that the fluoride onto the Al-La@CG hybrids was mainly based on the La species. Similarly, La-F in exhausted Fe-La@CG hybrids accounted for 55.6%, higher than that (44.4%) of Fe-F.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Wenlu Song,Meng Guo,Junzhu Chen,Ting Qi,Xiuxiu Ren,Dongliang Jin,Jing Zhong
Dimethyl carbonate (DMC), as an environmentally friendly green chemical, has been widely used in industrial, pharmaceutical, and food applications. However, the utilization of methanol (MeOH) in its production process leads to the formation of azeotropic mixtures that are difficult to be separated. Similarly, this problem also presents a critical challenge in toluene (TOL) production process. Pervaporation technology has emerged as an effective solution to this challenge, due to its characteristics of energy-efficient and high-performance. Nevertheless, the development of membrane materials that simultaneously exhibit high flux and excellent selectivity remains a significant challenge. In this study, bis(triethoxysilyl)ethane (BTESE) was employed as a precursor to fabricate organosilica membranes by adjusting the H 2 O/BTESE molar ratio, and their separation performance for MeOH/DMC and MeOH/TOL systems was systematically investigated. The results illustrated that the optimized BTESE membrane exhibits outstanding pervaporation performance, achieving separation factor of 1868/113 and high fluxes of 2.12/1.55 kg m −2 h −1 for MeOH/TOL and MeOH/DMC mixtures, respectively. Further studies reveal that membrane performance is closely correlated with the H 2 O/BTESE ratios, and tuning the molecular sieving properties effectively balances flux and separation factor. Additionally, gas permeation experiments elucidate the mass transfer mechanisms of organic solvent molecules in the membranes, providing theoretical guidance for the design of high-performance organosilica membranes. This study offers an energy-efficient membrane-based solution for methanol separation in MeOH/DMC and MeOH/TOL mixtures.
研究领域:
材料科学
·
化学工程
·
膜分离技术
·
绿色化工
·
能源与环境工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2020
·
IF 2.369
Ying Zhang,Taotao Zhan,Junshuai Chen,Xin Li,Qi Zhou,Maogang He
The experimental speeds of sound for the binary system of ethanol (1) + n-heptane (2) with the mole fractions of ethanol being (0.100, 0.300, 0.500, 0.700, and 0.900) were measured by Rayleigh-Brillouin light scattering spectroscopy at temperatures from 293.35 to 433.89 K along three isobaric lines from 0.1 to 5.0 MPa. The expanded relative uncertainty for the reported speed of sound is estimated to be 1.6% with the level of confidence of 0.95 (coverage factor k = 2). The experimental data were correlated as a function of temperature and pressure, yielding absolute average percentage deviations of 0.34, 0.20, 0.38, 0.28, and 0.29% for the mole fractions of ethanol being 0.100, 0.300, 0.500, 0.700, and 0.900, respectively. Within the temperature limits of 298.15–318.15 K, the derived thermo-acoustic properties for the binary system of ethanol (1) + n-heptane (2), including the density, the specific isobaric heat capacity, the isentropic compressibility, the isobaric thermal expansivity, the isothermal compressibility, the specific heat ratio, the internal pressure and the free volume at pressures up to 5.0 MPa, and the intermolecular free length under atmospheric pressure were calculated and analyzed.
研究领域:
物理化学
·
热力学
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLUTION CHEMISTRY
·
2019
·Vol. 48
·期 4
·546-563
·
IF 1.039
Li Dan,Wang Zhiyong,Guo Meng,Wang Huiqin,Chen Xiaoyan
Densities, viscosity and bubble-point vapor pressures for binary mixtures of dimethoxy methane and a hydrocarbon fuel ( exo -tetrahydrodicyclopentadiene) were measured over the whole composition range. The excess molar volumes ( \( V_{\text{m}}^{\text{E}} \) ) and viscosity deviations (Δ η ) for the binary systems were calculated from the density and viscosity data. The Antoine equation was fitted with the experimental vapor pressures, and the corresponding parameters were calculated. Positive values of excess molar volumes, negative viscosity deviations and positive deviations from Raoult’s law for the vapor pressures are observed. The three physical properties and the corresponding calculation results provide valuable information on the application and study of mixed liquid hydrocarbon fuels.
研究领域:
化学工程
·
热力学
✓ 已验证
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2020
·
IF 5.065
Tiantian Ping,Yu Dong,Shufeng Shen
Nonaqueous CO 2 absorbents, composed of secondary alkanolamines and 2-alkoxyethanols, have attracted much attention for an energy-efficient CO 2 capture process. In this work, densities and viscosities of partially CO 2 -loaded mixtures of 2-(butylamino)ethanol (BAE) + 2-butoxyethanol (EGBE) and 2-(ethylamino)ethanol (EAE) + EGBE were measured at atmospheric pressure over the temperature range of (293.15 to 353.15) K with amine mass fraction ( w 1 ) of (0.10, 0.30 and 0.50) containing various CO 2 loading. With increasing CO 2 loadings, significant increases in both density and viscosity were observed. Dimensionless ρ loaded · ρ CO2-free −1 and η loaded · η CO2-free −1 from the CO 2 -free and CO 2 -loaded systems were fitted by proposed correlations as a function of temperature, amine concentration and CO 2 loading. The calculated values of density and viscosity from the correlations are in good agreement with the experimental results, with AADs within 0.15% and 1.60% for density and viscosity respectively. The dramatic increase in viscosity of carbonated solutions was interpreted by the intermolecular interactions and the formation of ionic products in the mixtures based on the FTIR spectral results.
研究领域:
化学工程
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2011
·
IF 2.089
Hengde Li,Tianfei Zhang,Weiqin Fu,Kazuhiro Tamura
Liquid–liquid equilibrium (LLE) data of the binodal curves and tie-line compositions were examined for ternary mixtures of (water + methanol + geraniol) and (water + ethanol + geraniol) at T = (283.15, 298.15, and 313.15) K. The immiscible area of the (water + methanol + geraniol) system is wider than that for the ethanol system at the same temperature. The experimental liquid–liquid equilibrium data have been represented by using the original UNIQUAC, extended UNIQUAC, and modified UNIQUAC models.
研究领域:
化学工程
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
·
2015
·
IF 2.515
Yang Yang,Shun Yao,Jing Lu,Xuezhi Dai,Hang Song
Phase diagrams for the binary systems ethanol or water + tropine-type ionic liquids including N-benzyl-tropine hexafluorophosphate, N-(3-methoxybenzyl)-tropine hexafluorophosphate, N-(4-nitrobenzyl)-tropine hexafluorophosphate and related ternary systems (ethanol + water + ionic liquid) were measured with equilibrium method at atmospheric pressure in the temperature range of 278.15 K to 333.15 K. With the increase of temperature, the solubility of these ionic liquids increased obviously and the temperature-sensitive property in binary solvent mixture (water + ethanol) was also proven. On the other side, cosolvency phenomenon was also found in binary system. And it was found that the cosolvency related to the ratio of water and ethanol, as well as the strength of hydrogen bonding between solvent and cationic groups of ILs. The solubility of ionic liquids in the single solvent and certain concentration of binary solvent mixture was correlated by two empirical equations (Apelblat and λh ) and two theoretical models (Wilson and NRTL) with good results. This study provides useful information for further research and application of these ionic liquids.
研究领域:
物理化学
·
材料科学
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2018
·Vol. 9
·期 1
·10
·
IF 3.504
Yuelong Xu,Bin Ren,Ran Wang,Lihui Zhang,Tifeng Jiao,Zhenfa Liu
In the present study, nanoscale rod-shaped manganese oxide (MnO) mixtures were successfully prepared from graphitic carbon nitride (C3N4) and potassium permanganate (KMnO4) through a hydrothermal method. The as-prepared MnO nanomixtures exhibited high activity in the adsorption and degradation of methylene blue (MB). The as-synthesized products were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), surface area analysis, X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). Furthermore, the effects of the dose of MnO nanomixtures, pH of the solution, initial concentration of MB, and the temperature of MB removal in dye adsorption and degradation experiments was investigated. The degradation mechanism of MB upon treatment with MnO nanomixtures and H2O2was studied and discussed. The results showed that a maximum adsorption capacity of 154 mg g−1was obtained for a 60 mg L−1MB solution at pH 9.0 and 25 °C, and the highest MB degradation ratio reached 99.8% under the following optimum conditions: 50 mL of MB solution (20 mg L−1) at room temperature and pH ≈ 8.0 with 7 mg of C, N-doped MnO and 0.5 mL of H2O2.Keywords:hydrothermal method;manganese oxide;adsorption;degradation;nanomixtures
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2020
·Vol. 22
·期 10
·5702-5710
·
IF 3.43
Fei Yao,Nan Gong,Wenhui Fang,Zhiwei Men
Halogen bonding, an attractive interaction that is analogous to hydrogen bonding, has been widely investigated by computational methods. However, halogen bonding in solution is hard to study by spectroscopic techniques since the intermolecular interaction often gives overlapping bands and may be difficult to interpret. The traditional interpretation of iodomethane–ethanol mixtures considered only hydrogen bonding effects and the experimental investigation was limited. Here, we employed near-infrared (NIR) spectroscopy, Raman, density functional theory calculation, and two-dimensional (2D) correlation analysis to find evidence of the halogen bonding in iodomethane–ethanol mixtures. Our results suggest that the blue-shifting C–I stretching band is probably due to the cooperative influence from halogen bonding, hydrogen bonding, and the solvent effect, while the O–H band is a cumulative band from three dimer complexes. The 2D correlation spectra further validate the hypothesis above and reveal the interaction evolution from the ethanol-rich region to the iodomethane region. These results indicate that the unique nature of the iodomethane–ethanol mixture and the larger σ-hole strengthen the halogen bond, leading to particular spectroscopic results which are different from those of the other halogenated alkanes.
研究领域:
物理化学
·
光谱学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2022
·
IF 3.119
Lingxiao Cai,Jiajia Yin,Xiaopo Wang
The density and viscosity of binary mixtures of polyoxymethylene dimethyl ethers (PODEn) with three 1-alcohols (1-propanol, 1-butanol, and 1-pentanol) were investigated in this work from 303.15 to 333.15 K and at atmospheric pressure. The measurements were conducted by a vibrating-tube method for density and a capillary-tube method for viscosity. The densities and viscosities of the mixtures were correlated by the Jouyban–Acree model and McAllister four-body model, respectively. In addition, the excess molar volumes and the viscosity deviations of the mixtures were computed and correlated by the Redlich–Kister equation, and the discussion about the excess molar volumes and viscosity deviations was carried out.
研究领域:
物理化学
·
材料科学
✓ 已验证
DOI
高影响因子
ChemSusChem
·
2025
·
IF 6.6
Zhenyu Zhai,Yunjie Li,Zhilei Li,Jingting Wang,Yuan Li,Yi-Heng P. Job Zhang
Graphical Formaldehyde poses a significant threat to human health. We developed an enzymatic technique for the cleanup of formaldehyde in aqueous solutions. This technique utilized an enzyme cocktail, which catalyzed the reaction of formaldehyde and ambient dioxygen into carbon dioxide and water, with degradation ratios of up to 100 %. Numerous methods have been developed to address gaseous formaldehyde pollution, but most of them cannot be applied directly to eliminate the pollution of formaldehyde in aqueous solutions. Formaldehyde in aqueous solutions can be leached from formaldehyde-containing solid materials (e. g., food, wood, clothes, resins) and absorbed from gaseous formaldehyde by water. Here we developed an enzymatic cleanup technique — the reconstitution of an enzyme cocktail consisting of three coenzyme-free oxidoreductases (i. e., formaldehyde dismutase, methanol oxidase, and formate oxidase) and catalase for the complete oxidation of formaldehyde. This enzyme cocktail catalyzed the reaction of formaldehyde and ambient dioxygen into carbon dioxide (CO 2 ) and water, which was demonstrated by the stable isotope tracer technique. Significant levels of formaldehyde were detected from aqueous solutions leached from the squid, pomfret, fabric, and curtain in the market. When this enzyme cocktail was applied to treat the leachates of contaminated samples above, formaldehyde was eliminated with degradation ratios of up to 100 %. This enzymatic cleanup technique, featuring excellent biosafety (for example, degradable catalysts and non-immunogenicity), independence from light, high degradation ratios, and no special equipment required, could be widely used to treat contaminated food, drinking water, and formaldehyde-containing leachate.
研究领域:
环境科学
·
生物化学
·
食品科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
·
2021
·
IF 3.178
Hao Wang,Nianzu Zhang,Xiaopo Wang
In this work, the density and viscosity data for binary mixtures of dimethyl carbonate with 1-heptanol, 1-octanol, 1-nonanol, and 1-decanol were presented from 303.15 K to 333.15 K at atmospheric pressure over different concentration ranges. The density and viscosity measurement was carried out based on the vibrating-tube densimeter and Ubbelohde capillary viscometer, respectively. Derived properties, such as excess molar volumes and viscosity deviations, were calculated from the experimental values, and were correlated based on the Redlich-Kister equation. In addition, excess molar volumes and viscosity deviations of the studied mixtures were analyzed and compared with other DMC/1-alcohols mixtures reported in the literatures.
研究领域:
物理化学
·
热力学
✓ 已验证
产品关联
DOI
高影响因子
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