JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2014
·
IF 2.045
Lijuan Peng,Qinbo Wang,Binwei Shen,Chuxiong Chen,Zhenhua Xiong
Liquid–liquid equilibrium (LLE) data for the ternary system water + ethylbenzene + acetophenone and water + ethylbenzene + 1-phenylethanol were determined at temperatures T = (298.2, 308.2, 318.2, and 328.2) K and atmospheric pressure. The immiscibility region was found to be relatively small and not sensitive to the change of temperature. The Othmer–Tobias and the Bachman correlations were used to test the consistency of the LLE data. The experimental data were correlated by both the nonrandom two-liquid and the universal quasichemical activity coefficient models. The relevant model interaction parameters were regressed by data fitting. The model correlated results show good agreement with the measured data. The obtained interaction parameters can be used in the calculation of LLE for the ternary system water + ethylbenzene + acetophenone and water + ethylbenzene +1-phenylethanol as well as for the design and optimization of the related separation process.
研究领域:
化学工程
·
热力学
✓ 已验证
DOI
高影响因子
Water
·
2022
·Vol. 14
·期 12
·1864
·
IF 3.53
Shanli Wang,Lu Zhang,Mingyan Zhang,Licong Xu,Qian Hu,Tao Yang,Kaili Tu,Minghua Wu,Deyou Yu
Metal–organic frameworks (MOFs) featuring porous structures and large specific surface areas have shown great potential in removing organic pollutants from wastewater via adsorption processes. Although the particle size of MOFs determines the adsorption performance (something known as the size-dependent effect), engineering it into desirable dimensions for enhancing the adsorption performance is a great challenge. Here, we develop a practical and facile approach to regulate the particle size of copper benzene-1,3,5-tricarboxylate (Cu-BTC) adsorbents with high tunability by screening the functional modulator of various surfactants adding in hydrothermal synthesis procedure. The effect of surfactant type and concentration on the particle size of Cu-BTC was systematically investigated. The results show that the nonionic surfactant polyvinylpyrrolidone (PVP) demonstrated the greatest ability to control the particle size of Cu-BTC among other counterparts (e.g., N, N, N-trimethyl-1-dodecanaminium bromide (DTAB), polyethylene glycol (PEG1000), sodium dodecyl sulfate (SDS), sodium dodecyl benzene sulfonate (SDBS) and hexadecyl trimethyl ammonium bromide (CTAB)). By increasing the PVP concentration to 0.14 mmol L−1, the average particle size of Cu-BTC could be correspondingly reduced by more than ten times, reaching to a comparative smaller value of 2.4 μm as compared with the reported counterparts. In addition, the PVP allowed a large increase of the surface area of Cu-BTC according to porosity analysis, resulting in a great enhancement of methylene blue (MB) adsorption. The PVP-modulated Cu-BTC showed fast adsorption kinetics for MB removal accompanied with a maximum adsorption capacity of 169.2 mg g−1, which was considerably competitive with most of the analogs reported. Therefore, our study may inspire concepts for engineering the particle size of Cu-BTCs with improved properties for more practical applications.Keywords:Cu-BTC;particle size;adsorption;surfactant;modulator
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
Polymers
·
2020
·Vol. 12
·期 2
·414
·
IF 3.426
Caibin Cai,Xiaotao Fan,Xiaolong Han,Jiding Li,Harsh Vardhan
In this paper, copper benzene-1,3,5-tricarboxylate (CuBTC) was incorporated into polyethylenglyol (PEG) to prepare a mixed matrix membrane (MMM) for pervaporation desulfurization. The characterization results showed that the prepared CuBTC particles had an ideal octahedral shape and micropores. The Cu2+in CuBTC interacts with thiophene via π-complexation, thus enhancing the separation performance of the hybrid membranes. The effect of CuBTC content and the operating condition on the pervaporation performance of the MMMs was investigated. An optimal pervaporation separation performance was acquired with a permeation flux of 2.21 kg/(m2·h) and an enrichment factor of 8.79, which were increased by 100% and 39% compared with the pristine PEG membrane. Moreover, the CuBTC-filled PEG membrane showed a good stability in the long-term desulfurization under a high operating temperature of 75 °C for five days.Keywords:CuBTC nanoparticles;mixed matrix membranes;pervaporation desulfurization
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF CHEMICAL KINETICS
·
2021
·Vol. 54
·期 2
·71-80
·
IF 1.462
Yufei Yang,Yadong Zhang
In this work, a HPW/ZSM-5 catalyst was prepared by impregnating phosphotungstic acid (HPW) with carrier ZSM-5 zeolite and characterized by XRD, SEM, N 2 adsorption/desorption isotherm, NH 3 -TPD, and FT-IR techniques. The catalytic performance of HPW/ZSM-5 was investigated by using the decomposition reaction of cyclohexylbenzene-1-hydroperoxide (CHBHP) to phenol and cyclohexanone. The conversion rate of CHBHP was up to 97.28%. In addition, the reusability test exhibited that the high durability HPW/ZSM-5 as the conversion rate of CHBHP only decreased by 3.11% after five runs. The kinetic study of the decomposition reaction indicated it was a primary reaction. The apparent activation energy of the decomposition reaction was 102.39 kJ·mol –1 in the temperature range of 45–60℃. All results indicate that the HPW/ZSM-5 catalyst has good performance and promising applications in acid catalyzed organic chemistry.
研究领域:
催化化学
·
有机化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHROMATOGRAPHY A
·
2023
·
IF 4.1
Di Zhang,Yuchen Zhu,Yan Jin,Boxin Chen,Bin Zhao,Lei Li,Haimei Zhou,Xinxin Li,Dan Zheng,Fei Feng
A composite material was synthesized at room temperature by performing modification of the copper benzene-1,3,5-tricarboxylate (HKUST-1) metal-organic framework material by multilayer fluorinated graphene (FG). The FG-HKUST-1 composite was used as a stationary phase for a micro gas chromatography column (μGCC) fabricated using micro-electro-mechanical system (MEMS) technology. The separation results showed that the μGCC with the FG-HKUST-1 composite stationary phase achieved a baseline separation of C 1 -C 4 in 8 min. The retention factors for C 2 -C 4 were 2.13, 7.14, and 12.04, respectively. The maximum relative standard deviation (RSD) of the retention times was 0.14 %. The difference in the retention time between methane and ethane was 1.11 min, with a resolution of 9.2 for methane and ethane. The retention factor of ethane and the resolution of methane and ethane were increased by 166 % and 114 %. Therefore, this μGCC is promising for separating light hydrocarbons with widely differing concentrations.
研究领域:
分析化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
·
2017
·Vol. 643
·期 10
·669-674
·
IF 1.144
Fan Ye,Zhi-Xian Wei,Jiang-Feng Song,Xu-Hong Wu,Pan Yue
{[Bi(BTC)(H 2 O) 2 ] · H 2 O} n (H 3 BTC = 1,3,5-benzenetricarboxylic acid) was synthesized by an eco-friendly hydrothermal method and characterized by single-crystal X-ray diffraction, IR and UV/Vis spectroscopy, photoluminescence (PL), and thermogravimetric analyses. The complex featured a 3D metal-organic framework with Bi 2 secondary building units. In the complex, the central Bi 3+ is nine-coordinate, three central Bi atoms and three BTC 3– anions are interconnected into a ring with the dimension of 7.95 × 9.89 Å 2 . Moreover, the complex is decomposed at over 388 °C, showing its highly thermal stability. Further, the complex exhibits photocatalytic activity for the degradation of methyl orange (MO) solution under UV light irradiation, and its structure can keep consistent with the original one after 9 h photocatalytic reaction, indicating that it is also very stable under UV light. Therefore, it could be anticipated the novel coordination complex will be a stable ultraviolet light catalyst.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
·
2025
·
IF 5.8
Wantong Wang,Shun Liu,Jiayi Li,Yimei Zhang,Xiaoze Du
The classical metal-organic framework (MOF) Cu-BTC exhibits low thermal conductivity, which causes extreme temperature distribution inhomogeneity and limits its application as a support for methanol and steam reforming (MSR) thermocatalysts. A series of GO+Cu-BTC composites were synthesized via a one-pot hydrothermal method by combining Cu-BTC with graphene oxide (GO). The effects of GO with different oxidation degrees and mass fractions on the thermal conductivity from room temperature to 200 °C and the specific surface area of the composites were analyzed comprehensively, as well as the influence mechanism of GO addition on the thermal conductivity. The results indicated that the GO-induced changes in crystals characteristics, the formation of thermal conduction pathways through GO coverage and the new spaces between GO and Cu-BTC collectively achieve the co-enhancement on thermal conductivity and specific surface area and of the composites. For the composite with the same GO mass fraction, the thermal conductivity decreased with the increasing oxidation degree of GO and for the composite with the same GO oxidation degree, the thermal conductivity firstly decreased and then increased with the increasing mass fraction of GO. The specific surface area decreases with the increasing oxidation degree of GO and the optimum oxidation degree was 0.3. GO shows a significant enhancement in specific surface area at low mass fraction but caused a sharp decrease in specific surface area with the excessive GO mass fraction. Among all the composites, the optimal 0.1 wt.%GO-0.3+Cu-BTC exhibited the highest BET and Langmuir specific surface areas of 1394.55 m 2 /g and 1939.67 m 2 /g, which were 44 % and 43 % higher than those of pure Cu-BTC and its thermal conductivity at 25 °C, 100 °C and 200 °C achieved 0.31 W/(m· °C), 0.27 W/(m· °C) and 0.31 W/(m· °C), which were 211 %, 200 % and 53 % higher than that of pure Cu-BTC, respectively. It providing novel design strategies and experimental supports for the optimization of the heat transfer performance of MOFs developed as carriers for thermal catalytic systems.
研究领域:
材料科学
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物理化学
·
热催化
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纳米复合材料
·
多孔材料
✓ 已验证
产品关联
DOI
高影响因子
Journal of Coatings Technology and Research
·
2022
·Vol. 19
·期 3
·907-917
·
IF 2.339
Su Qiuping,Tang Zilun,He Jiajian,Gu Yuxin,Li Yong,Xie Jing,Wang Shaoshun,Lin Ruijun,Lin Xiaofeng,Lin Wenjing,Yi Guobin
In this work, tris(oxiran-2-ylmethyl) benzene-1,3,5-tricarboxylate (TOTC) was synthesized by a new two-step method without using harmful epichlorohydrin and served as a curing agent for polyester powder coatings. The chemical structure of TOTC was determined by Fourier transform infrared spectroscopy and nuclear magnetic resonance spectroscopy. The curing behavior and the curing reaction kinetics of TOTC/polyester resin (NH-3307) system were studied by dynamic differential scanning calorimetry. The activation energy E a was 71.75 kJ mol -1 according to Flynn–Wall–Ozawa method, and the curing reaction of TOTC/NH-3307 system was described by Friedman method. It was found that the curing reaction of TOTC/NH-3307 system was a two-parameter autocatalysis which followed the Šestάk–Berggren model. The nonisothermal curing reaction rate was simulated according to the Šestάk–Berggren model and the experimentally parameters. What is more, the thermogravimetric analysis results showed that the TOTC/NH-3307 system had good thermal stability with an initial decomposition temperature of 374.92°C. The TOTC/NH-3307 cured film exhibited excellent leveling performance by SEM. The results demonstrated that TOTC has efficient curing ability and huge market potential.
研究领域:
材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Soft Matter
·
2022
·Vol. 18
·期 16
·3241-3248
·
IF 4.046
Ying Zhang,Hejie Wang,Qintang Li,Xiao Chen
As novel solvents, deep eutectic solvents (DESs) are non-toxic, easily producible and biocompatible, which is attractive for eutectogel fabrication. In this work, a benzene 1,3,5-tricarboxamide (BTA) derivative (substituted by three hexanoic acid) was selected to prepare a supramolecular gel in a suitable DES composed of choline chloride and phenylacetic acid molecules. The obtained eutectogel exhibited higher stability than that produced in conventional solvents. The gel microstructure was composed of spiral fiber networks as confirmed from atomic force microscopy and scanning electron microscopy observations. Macroscopic chirality was therefore recognized by the circular dichromatic spectrum, though such a supramolecular chiral signal was random. To explore the gelation mechanism, the effect of BTA derivative molecular structure change was systematically investigated. With the help of Fourier transform infrared spectroscopy and powder X-ray diffraction, the gel formation was attributed to the π–π stacking of adjacent BTA molecules and the three-fold hydrogen bond between amide groups or the hydrogen bond between carboxylic groups. Furthermore, the directional hydrogen bonds between BTA and solvent molecules induced their aggregate to form one-dimensional fibers, which were either left- or right-handed. The obtained results not only extend the gel systems in DESs, but also help design the supramolecular chirality from non-chiral molecules.
研究领域:
材料科学
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超分子化学
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物理化学
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Long Tian,Xiaonan Song,Yi Liu,Churu Zhang,Lan Shi,Qinglin Chen,Yanyan Deng,Weigang Cui,Shaoyun Shan,Tianding Hu
Defect-engineered metal–organic frameworks (DEMOFs) are emerging advanced materials. The construction of DEMOFs is of great significance; however, DEMOF-based catalysis remains unexplored. (E)-vinylboronates, an important building block for asymmetric synthesis, can be synthesized via the hydroboration of alkynes. However, the lack of high-performance catalysts considerably hinders their synthesis. Herein, a series of DEHKUST-1 (HKUST = Hong Kong University of Science and Technology) (Da–f) catalysts with missing occupation of linkers at Cu nodes were designed by partially replacing benzene-1,3,5-tricarboxylate (H 3 BTC) with defective connectors of pyridine-3,5-dicarboxylate (PYDC) to efficiently promote the hydroboration of alkynes. Results showed that the Dd containing 0.8 doping ratio of PYDC exhibited remarkable catalytic activity than the defect-free HKUST-1. This originated from the improved accessibility for reactants towards the Lewis acid active Cu sites of DEHKUST-1 due to the presence of plenty of rooms next to the Cu sites and enhanced coordination ability in such ‘defective’ HKUST-1. Dd had high selectivity (>99 %) and yield (>96 %) for (E)-vinylboronates and extensive functional group compatibility for terminal alkynes. Density functional theory (DFT) calculations were performed to elucidate the mechanism of hydroboration. Compared with that of defect-free HKUST-1, the low energy barrier of DEHKUST-1 can be attributed to the lower coordination number of Cu sites and enhanced accessibility of Cu active sites towards reagents.
研究领域:
材料科学
·
催化
·
化学工程
·
理论化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DYES AND PIGMENTS
·
2023
·
IF 4.5
Shaofang Ma,Zihan Zhu,Jianfei Xu,Jing Wang,Xinjing Tang,Wei Bian
Herein, we rationally designed and synthesized novel green-emitting fluorescent carbon dots (CDs) through cross amide formation of two precursors, benzene-1,3,5-triamine trihydrochloride and trimethyl 1,3,5-benzenetricarboxylate, under hydrothermal treatment . The average particle size of the CDs was ∼2.7 nm with graphitic carbon structures. The obtained CDs showed good photoluminescent properties with a quantum yield of up to 11.2%. The carbon dots showed good fluorescence sensitivity and selectivity for Hg 2+ , and the LOD and LOQ values were 17.5 pM and 58.3 pM in the range of 0.1–0.8 μM, which could be successfully applied to Hg 2+ detection in real water samples as well as intracellular Hg 2+ fluorescence detection .
研究领域:
材料科学
·
分析化学
·
环境科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
MICROCHEMICAL JOURNAL
·
2024
·
IF 4.9
Xu Lu,Ming Li,Keqiang Bo,Bin Zheng,Xu Hun
A photoelectrochemical (PEC) assay strategy for the detection of matrix metalloproteinase-9 (MMP-9) was fabricated. RuSe 2 /CuO nanohybrids were first prepared by hydrothermal method. As a transition metal element semiconductor, RuSe 2 has excellent optical and electrical properties. By combining the excellent conductivity and adjustable bandgap of CuO, a binary heterojunction nanoflower with high photoelectric response was obtained. The combination of RuSe 2 and CuO reduces the electron hole recombination rate; the RuSe 2 /CuO nanohybrids exhibits a higher photocurrent response. In the MMP-9 PEC strategy determination, the magnetic beads (MB)-peptide-alkaline phosphatase (ALP) recognition probe was formed by modifying C-terminal of the peptide chain with biotin and binding to ALP, and the N-terminal was connected to carboxylated MB. When the target MMP-9 exists, the recognition probe, MB-Peptide-ALP, was recognized by MMP-9 to cut the substrate area and coding area and release ALP, catalyzing the hydrolysis of O-phosphonoxyphenol (OPP) to produce benzene-1,2-diol in situ, the photocurrent response was generated. This strategy provides lower background PEC noise for detecting MMP-9, with the advantage of simplicity and the sensitivity than conventional ELISA. The results showed that the recognition peptide probe PEC method achieved ultra-high sensitivity detection of target MMP-9, with a linear detection range of 1 pg/mL–100 ng/mL and a detection limit of 0.3 pg/mL (S/N = 3). The results of PEC assay strategy in human serum sample give the recoveries rate of 94.3 % to 108.1 % and relative standard deviation of 0.45–5.87 %.
研究领域:
纳米技术
·
生物化学
·
分析化学
·
医学诊断
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）