JOURNAL OF NANOPARTICLE RESEARCH
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2019
·Vol. 21
·期 2
·1-12
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IF 2.009
Xia Xiaoxiao,Li Wei,Li Song
Ionic liquids/metal-organic framework composites are recognized as promising adsorbents for CO 2 capture due to the outstanding adsorption performance, whereas their water stability, which is critical for the real application of ILs/MOF composites, has not been taken into consideration. In this work, the water stability of two ILs/Cu-BTC composites, i.e., 1-butyl-3-methylimidazolium tetrafluoroborate ([BMIM][BF 4 ]) /Cu-BTC and 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM][PF 6 ]) /Cu-BTC, were investigated. We found that the loading of ILs does not impose remarkable impacts on the crystalline structure of Cu-BTC upon water exposure; whereas the thermal stability and surface area of Cu-BTC were decreased by the incorporation of ILs, thereby leading to the reduced CO 2 uptake in spite of the enhanced CO 2 heat of adsorption. Furthermore, it was revealed that the decomposition of Cu-BTC occurred within the first hour of water exposure. Nevertheless, the loading of ILs retarded the decomposition of Cu-BTC according to the variations in BET surface area upon water exposure.
Graphical abstract
研究领域:
材料科学
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环境科学
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高影响因子
RSC Advances
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2018
·Vol. 8
·期 69
·39352-39361
·
IF 2.936
Huanxuan Li,Jialing Qin,Yayun Zhang,Shaodan Xu,Jia Du,Junhong Tang
Copper-based metal organic framework (Cu-BTC) was prepared and used to remove dibutyl phthalate (DBP) in the presence of persulfate (PS). The surface characteristics, textural properties, and stability of activated Cu-BTC (denoted as Cu-BTC-A) were evaluated by scanning electron microscope (SEM), X-ray diffraction (XRD), Fourier transform infrared (FTIR), X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, N2 physical adsorption–desorption, electrochemical impedance spectroscopy (EIS) and cyclic voltammetry (CV). The effects of parameters such as initial pH, PS concentration, catalyst dosage, and free-radical quenchers have been investigated. The results showed that DBP could be removed in a wide pH range by Cu-BTC-A via mechanisms of adsorption and heterogeneous catalytic reaction. Unfortunately, the DBP removal was not completed because of radical scavenging reactions in Cu-BTC-A cages where PS can enter freely but DBP is blocked outside. Another explanation was that Cu-BTC-A showed a low adsorption capacity for DBP because the molecular size of DBP (15.84 × 11.00 × 7.56 Å) is larger than microporous cages (approximately 9 × 9 Å in diameter) of Cu-BTC-A.
研究领域:
环境科学
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材料科学
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PubMed
高影响因子
MICROCHEMICAL JOURNAL
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2021
·
IF 4.821
Shan Luo,Yuanyuan Wang,Xianwen Kan
Ratiometric electrochemical sensing provides a new perspective for the accurate and reliable detection of different analytes since inner reference signal can effectively eliminate the internal and external interferences. There is still a challenge to explore new inner references for the development of ratiometric electrochemical sensing. Herein, a kind of redox-active metal-organic frameworks (Cu-THQ MOFs) was synthesized and characterized by scanning electron microscope, transmission electron microscope, X-ray powder diffractometer, and X-ray photoelectron spectroscopy techniques. Cu-THQ MOFs were composited with carboxylic group functionalized multi-walled carbon nantubes (MWCNTs-COOH) to construct a sensitive electrochemical sensor. The modified Cu-THQ MOFs not only showed good catalytic active to dopamine (DA), but also displayed the constant peak current with the increase of concentration of DA. And a separated oxidation peak potential of about 270 mV between DA and Cu-THQ MOFs can be observed. Accordingly, a current ratio ( i DA /i MOFs ) was employed as readout signal for DA detection with a linear range and limit of detection of 3.0 × 10 −7 – 4.0 × 10 −5 mol/L and 2.6 × 10 −8 mol/L, respectively. Compared with single signal of i DA , ratiometric strategy exhibited high accuracy and reliability for DA determination. The present ratiometric sensing strategy using MOFs as the inner reference may provide a new choice for future development of electrochemical sensors for other analytes reliable determination.
研究领域:
分析化学
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材料科学
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生物医学
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高影响因子
JOURNAL OF SOLID STATE CHEMISTRY
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2023
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IF 3.3
Abid Hussain Shah,Zain Ul Abideen,Sumaira Maqsood,Farzana Rashid,Rafi Ullah,Attiq Ur Rehman,Muhammad Dildar,Manzoor Ahmad,Kifayat Ullah,Muhammad Numan Rafi,Fei Teng
In this study, copper based metal organic frame work (Cu-MOF) was synthesized by using different solvents i. e. H 2 O, Dimethylformamide (DMF) and DMF + C 2 H 5 OH + H 2 O solutions at various temperatures. Cu-MOF synthesized in different solvents exhibited a large number of properties and advantages including easy synthesis procedure, high porosity, good crystallinity , high surface area, massive pore volume , controllable pore surface properties (zeta potential), rigid and chemical stability. The as-synthesized Cu- MOF was analysed by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET) surface area, zeta potential , electrostatic attraction and Thermal gravimetric analysis (TGA). A higher BET surface area of 121.1 m 2 g −1 was obtained for Cu-MOF synthesized in DMF + C 2 H 5 OH + H 2 O compared with H 2 O (109.3 m 2 g −1 ) and DMF (115.1 m 2 g −1 ) solvents. The as-obtained Cu-MOF was used to investigate adsorption kinetic performances of methylene blue (MB) and methyl orange (MO) dye molecules. Compared with other samples, Cu-MOF synthesized in (DMF + C 2 H 5 OH + H 2 O) has a significantly enhanced adsorption ability for MB but a lower for MO dyes. After 4 min, the adsorption co-efficient ( k) values were calculated to be 0.506, 0.846 and 1.1915 min −1 for MB and 0.029, 0.024 and 0.005 min −1 for MO dyes for Cu-MOF (H 2 O), Cu-MOF (DMF) and Cu-MOF (DMF + C 2 H 5 OH + H 2 O), respectively. It was found that Cu-MOF has a higher adsorption for MB dye but a poor adsorption capacity for MO, which was attributed to the electrostatic attraction/repulsion phenomena. Moreover, compared with Cu-MOF (DMF) and Cu-MOF (H 2 O), Cu-MOF (DMF + C 2 H 5 OH + H 2 O) shows an improved stability at 370, 417 and 423 °C temperatures. The result obtained through experiment suggested that porous Cu-MOF microstructures synthesized in DMF + C 2 H 5 OH + H 2 O have potential application for the treatment wastewaters having MB and MO dyes.
研究领域:
环境科学
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材料科学
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高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Yu Cao,Luona Wang,Chengyin Wang,Xiaoya Hu,Yunling Liu,Guoxiu Wang
A photoelectrochemical (PEC) sensor based on hierarchically porous Cu-BTC/g-C 3 N 4 nanosheet (Cu-BTC/CN-NS, BTC = benzene-1,3,5-tricarboxylic acid) material was constructed for the first time. As a composite material, the hierarchically porous Cu-BTC can help to efficiently capture suitable pesticide molecules and accelerate signal transmission, while CN-NS possesses good optical performance. Under the irradiation of visible light, the Cu metal center can coordinate with the added glyphosate to form Cu-glyphosate complexes, leading to the increased steric hindrance of electron transfer and consequently resulted in an obvious decrease in photocurrent . Through this strategy, the constructed sensor can realize the detection of glyphosate from non-electroactive to electroactive. The results indicate that this photoelectrochemical sensor has a low detection limit of 1.3 × 10 −13 mol L −1 and a wide detection range (1.0 × 10 −12 –1.0 × 10 −8 mol L −1 and 1.0 × 10 −8 ∼ 1.0 × 10 −3 mol L −1 ). Furthermore, this Cu-BTC/CN-NS based sensor has the characteristics of short detection time and easy operation. It has great potential applications in photoelectrochemical analysis.
研究领域:
分析化学
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环境科学
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DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2025
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IF 4.6
Jianlong Gu,Yuchen Liu,Jieyun Cai,Jie Long,Jing Ma,Zilong Zhang,Bing Yang,Hongming Meng,Yaling Yang,Li Gao
In this study, a colorimetric detection system for Cr(III) was established by leveraging the laccase-mimicking activity of two-dimensional Cu-based metal-organic frameworks (Cu-MOFs) modified with polydopamine (PDA) nanomaterials (Cu-MOF@PDA), through which Cr(III) specifically inhibits the catalytic performance. The Cu-MOF@PDA composite exhibited significant laccase-mimicking activity, enabling the oxidation of 2,4-dichlorophenol (2,4-DP) and 4-aminoantipyrine (4-AP), leading to the generation of a red-colored compound. Notably, the laccase-like activity of Cu-MOF@PDA was substantially enhanced under ultrasonic (US) stimulation. Free-radical trapping experiments revealed that the levels of singlet oxygen ( 1 O 2 ) and hydroxyl radicals ( OH) were markedly increased, while the electron transfer rate was accelerated, thereby boosting catalytic efficiency under US exposure. The research confirmed that Cr(III) binds to Cu-MOF@PDA, leading to the suppression of its catalytic activity. A strong linear correlation (R 2 = 0.995) was observed between the absorbance at 505 nm and Cr(III) concentrations ranging from 0.67 to 54.17 μg/L, with a low detection limit (LOD) of 0.26 μg/L (S/N = 3). The developed approach was effectively utilized for the analysis of Cr(III) and total Cr in cigarette tipping paper samples, yielding highly satisfactory results.
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高影响因子
Small
·
2024
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IF 13
Jun Deng,Limei Qiu,Mudi Xin,Wenhui He,Wenhui Zhao,Juncai Dong,Guangtong Xu
Cu-based metal-organic frameworks (MOFs) have attracted much attention for electrocatalytic CO 2 reduction to high value-added chemicals, but they still suffer from low selectivity and instability. Here, an associative design strategy for the valence and coordination environment of the metal node in Cu-based MOFs is employed to regulate the CO2 electroreduction to ethylene. A novel “reduction-cleavage-recrystallization” method is developed to modulate the Cu(II)-Trimesic acid (BTC) framework to form a Cu(I)-BTC structure enriched with free carboxyl groups in the secondary coordination environment (SCE). In contrast to Cu(II)-BTC, the Cu(I)-BTC shows higher catalytic activity and better ethylene selectivity (≈2.2-fold) for CO 2 electroreduction, which is further enhanced by increasing the content of free carboxyl groups, resulting in ethylene Faraday efficiency of up to 57% and the durability of the catalyst could last for 38 h without performance decline. It indicates that the synergistic effect between Cu(I)-O coordinated structure and free carboxyl groups considerably enhances the dimerization of *CO intermediates and hinders the hydrogenation of *CO intermediates in these competitive pathways. This work unravels the strong dependence of CO 2 electroreduction on the Cu valence state and coordination environment in MOFs and provides a platform for designing highly selective electrocatalytic CO 2 reduction catalysts.
研究领域:
材料科学
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电化学
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催化科学
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PubMed
高影响因子
Journal of Environmental Chemical Engineering
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2024
·
IF 7.4
Honglei Zhang,Zhuang Yan,Yue Ying,Fengbin Zheng,Rui Song,Zhiyong Tang,Yaling Liu
Development of effective strategies to improve the response sensitivity of metal-organic frameworks (MOFs) to target gases is imperative to further enhancing their application potential in gas sensing. In this work, series of CuHHTP/Cu 2 O (HHTP = 2,3,6,7,10,11-hexahydroxytriphenylene) composites are successfully constructed by in-situ electrochemical reduction treatment of CuHHTP, and the changing trend of first increasing and then decreasing with increase of CuHHTP electrochemical reduction degree for their sensitivity to NH 3 detection is revealed. When the average size of Cu 2 O nanoparticles generated in CuHHTP is 3.6 nm, the corresponding CuHHTP/Cu 2 O-A composite exhibits the best NH 3 sensing performance compared to pristine CuHHTP, including significantly enhanced response sensitivity, ultralow experimental detection limit of 10 ppb, superior selectivity, good reproducibility, and excellent response stability even after placed for 90 days. More impressively, thanks to integration and synergy of the uniformly-dispersed small-sized Cu 2 O nanoparticles with significantly enhanced adsorption activity and capacity for NH 3 , the released large amount of uncoordinated hydroxyl groups that can interact with NH 3 , as well as the active sites of the CuHHTP substrate itself, the 10 ppb experimental detection limit for the CuHHTP/Cu 2 O-A-based sensors is not only the lowest one reported in the past 10 years for NH 3 sensors based on copper-containing MOF and oxide materials, but also superior to that of 0.1–1 ppm for the existing commercial NH 3 sensors. This work opens the avenue for design and development of novel MOF-based sensing materials.
研究领域:
材料科学
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化学传感器
·
纳米材料
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DOI
高影响因子
LANGMUIR
·
2025
·
IF 3.9
Guoping Wang,Tian Tang,Ruichen Liu,Jingwen Li,Yi Xu,Sen Liao
By utilizing carboxylated multiwalled carbon nanotubes (MWCNT-COOH) to strengthen the interaction between the electrode and the analytes and improve the conductivity of the composite material and in conjunction with the superior catalytic properties of copper-based metal–organic framework (MOFs), a novel electrochemical sensor was fabricated from a Cu-MOF/MWCNT-COOH composite, specifically designed for the simultaneous and distinct detection of ascorbic acid (AA) and dopamine (DA). Electrochemical analyses were conducted on the innovative Cu-MOF/MWCNT-COOH electrode through both CV and DPV, revealing unique electrochemical behaviors for AA and DA. The sensor not only showed exceptional electrocatalytic properties but also distinguished itself by its broad dynamic response ranges, covering concentrations from 3 to 1800 μM for AA and from 2 to 180 μM for DA, with detection limits (S/N = 3) of 3.00 μM for AA and 0.32 μM for DA. Furthermore, this electrochemical detection platform exhibited robust reproducibility and selectivity. Examinations of serum samples yielded the recovery rates of AA and DA which were 101.9% and 102.1%, respectively, confirming the sensor’s capability to perform reliably under varied biological conditions. The findings confirm the sensor’s potential of the proposed method for the simultaneous, sensitive, and reliable detection of AA and DA. In conclusion, the electrochemical sensor has a promising potential for practical applications.
研究领域:
分析化学
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生物医学工程
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PubMed
高影响因子
ENERGY & FUELS
·
2020
·
IF 3.421
Houxiao Wu,Yinuo Yuan,Yongwei Chen,Daofei Lv,Shi Tu,Ying Wu,Zhong Li,Qibin Xia
CO2 capture and storage technologies have been adopted to eliminate anthropogenic CO2 emission. Compared with other methods, adsorptive separation technology using excellent adsorbents has attracted extensive attention for its operational flexibility and energy-efficient characteristics. Herein, we present a copper-based metal–organic framework, MOF-11, exhibiting highly efficient CO2/N2 (15:85, v/v) separation performance. There are two kinds of channels with different pore chemistries in the framework, in which dense Cu open metal sites (OMS) were found in channel I, while channel II had a narrower pore window size and was mainly decorated with −CH2 moieties from the organic ligands. At 298 K, the CO2 uptake value of MOF-11 was 4.63 mmol/g at 100 kPa and 2.92 mmol/g at 15 kPa, respectively, which was superior to many other reported MOF adsorbents. Molecular simulation indicated that CO2 dominantly occupied channel I due to the strong electrostatic interactions with the dense Cu OMS in channel I. In comparison, more N2 molecules were adsorbed into channel II through multiple weak van der Waals interactions with −CH2 moieties. Such a pore system gives MOF-11 high CO2/N2 selectivity (ca. 116 at 298 K). Moreover, the dynamic separation of CO2/N2 mixture gases on MOF-11 was further investigated by cyclic breakthrough experiments.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
BIOSENSORS & BIOELECTRONICS
·
2014
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IF 6.451
Xue Wang,Xianbo Lu,Lidong Wu,Jiping Chen
As is well known, bisphenol A (BPA), usually exists in daily plastic products, is one of the most important endocrine disrupting chemicals . In this work, copper-centered metal-organic framework (Cu-MOF) was synthesized, which was characterized by SEM, TEM , XRD , FTIR and electrochemical method . The resultant Cu-MOF was explored as a robust electrochemical biosensing platform by choosing tyrosinase (Tyr) as a model enzyme for ultrasensitive and rapid detection of BPA. The Cu-MOF provided a 3D structure with a large specific surface area, which was beneficial for enzyme and BPA absorption, and thus improved the sensitivity of the biosensor. Furthermore, Cu-MOF as a novel sorbent could increase the available BPA concentration to react with tyrosinase through π – π stacking interactions between BPA and Cu-MOF. The Tyr biosensor exhibited a high sensitivity of 0.2242 A M −1 for BPA, a wide linear range from 5.0×10 −8 to 3.0×10−6 mol l −1 , and a low detection limit of 13 nmol l −1 . The response time for detection of BPA is less than 11 s. The proposed method was successfully applied to rapid and selective detection of BPA in plastic products with satisfactory results. The recoveries are in the range of 94.0–101.6% for practical applications. With those remarkable advantages, MOFs-based 3D structures show great prospect as robust biosensing platform for ultrasensitive and rapid detection of BPA.
研究领域:
环境科学
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分析化学
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生物医学工程
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DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2016
·Vol. 45
·期 18
·7728-7736
·
IF 4.177
Erbin Shi,Xiaoqin Zou,Jia Liu,Huiming Lin,Feng Zhang,Shaoxuan Shi,Fenghua Liu,Guangshan Zhu,Fengyu Qu
A facile electrochemical plating strategy has been employed to prepare the electroactive metal–organic framework film (NENU-3) onto a copper electrode in the acid electrolyte containing 1,3,5-benzenetricarboxylic acid (H3BTC) and phosphotungstic acid (PTA). The as-made NENU-3 films have been characterized using powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), Fourier transform infrared (FT-IR) spectroscopy and thermogravimetric analyses (TGA). These analyses indicate that NENU-3 films have high phase purity and high stability. Further, different electrochemical techniques are utilized for measuring the electrochemical behaviors of the NENU-3 film electrodes. Accordingly, the kinetic parameters of a NENU-3 film electrode towards the electrocatalytic reduction of bromate are obtained, including the electron transfer coefficient (α), the catalytic rate constant (ks), and the diffusion coefficient (D). The film electrodes present excellent electrocatalytic ability for the bromate reduction, and can be used successfully for the amperometric detection of bromate. Under the optimized conditions, the proposed sensor exhibits a wide linear range (0.05–72.74 mM) and a lower detection limit (12 μM) measured by chronoamperometry (CA). Moreover, the films possess high electrochemical stability and strong anti-interference capability in the bromate detection process. It has been demonstrated that the electrochemical plating method reported here offers a reliable and efficient way to fabricate MOF films on conductive substrates for bromate detection.
研究领域:
分析化学
·
材料科学
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PubMed
高影响因子
危险品化学品经营许可证（带存储）