Water
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2022
·Vol. 14
·期 12
·1864
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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
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化学工程
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DOI
PubMed
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
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材料科学
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产品关联
DOI
PubMed
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
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热催化
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纳米复合材料
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多孔材料
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DOI
高影响因子
Polymers
·
2024
·Vol. 16
·期 16
·2289
·
IF 4.7
Pingping Tang,Feiyu He
Owing to their potential to transform traditional medical diagnostics and health monitoring, wearable biosensors have become an alternative evolutionary technology in the field of medical care. However, it is still necessary to overcome some key technique challenges, such as the selectivity, sensitivity, and stability of biometric identification. Herein, a novel, wearable electrochemical sensor based on a molecularly imprinted polymer (MIP) integrated with a copper benzene-1,3,5-tricarboxylate metal–organic framework (MOF) was designed for the detection of stress through the on-body monitoring of cortisol in sweat. The MOF was used as the substrate for MIP deposition to enhance the stability and sensitivity of the sensor. The sensor consisted of two layers, with a microfluidic layer as the top layer for spontaneous sweating and a modified electrode as the bottom layer for sensing. The sensor measured cortisol levels by detecting the current change that occurred when the target molecules bound to the imprinted cavities, using Prussian blue nanoparticles embedded in the MIP framework as the REDOX probe. The proposed sensor exhibited a linear detection range of 0.01–1000 nM with a detection limit of 0.0027 nM, and favorable specificity over other analogies. This facile anti-body free sensor showed excellent stability, and can be successfully applied for in situ cortisol monitoring.
研究领域:
医疗诊断
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健康监测
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生物传感器
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材料科学
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电化学
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纳米技术
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DOI
PubMed
高影响因子
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