Journal of Materials Chemistry B
·
2018
·Vol. 6
·期 16
·2426-2431
·
IF 4.776
Zhen Wang,Pei Dong,Zhongxiong Sun,Ce Sun,Huaiyu Bu,Jing Han,Sanping Chen,Gang Xie
Here we report a general approach for synthesizing size/morphology-controlled NH2-Ni-MOFs by optimizing the solvent composition in the reaction system, and their correlating catalytic performances are clearly explored for the first time. Interestingly, the electrocatalytic performance was found to increase 2.7 fold when the particle size is reduced from 1.5 μm for NH2-Ni-MOF(a) to 300 nm for NH2-Ni-MOF(c). Subsequently, this work exhibits an example of a high-performance NH2-Ni-MOF(c) electrocatalyst for application in constructing an electrochemical aptasensor to achieve sensitive C-reactive protein (CRP) detection based on an aptamer binding induced DNA walker–antibody sandwich assay. The proposed aptasensor shows a wide linear range from 0.1 pg mL−1 to 100 ng mL−1 with a low detection limit of 0.029 pg mL−1. The work presented here can thus offer an atypical approach to size- and morphology-controlled MOFs in electrocatalysis and biosensing.
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TALANTA
·
2019
·
IF 4.916
Leilei Sun,Tao Wang,Yuzhen Sun,Zexin Li,Haining Song,Bin Zhang,Guangjun Zhou,Haifeng Zhou,Jifan Hu
Dual-functional nanosensors based on small molecule regulation can be widely used due to their simplicity, high sensitivity and selectivity. Herein, glutathione (GSH) calibrated dual-functional system for GSH and cadmium ions (Cd 2+ ) detection based on fluorescence resonance energy transfer (FRET) between NH 2 –NaYF 4 :Yb,Er/NaYF 4 @SiO 2 upconversion nanoparticles (UCNPs) and gold nanoparticles (AuNPs) is designed. Unmodified AuNPs are easy to aggregate in high-salt solution and thereby quenching the red emission of UCNPs. The presence of GSH prevents the aggregation of AuNPs, so GSH can be detected by the changes in the color of solution and the recovery of red emission of UCNPs. However, Cd 2+ can interact with GSH, which makes AuNPs easy to aggregate, resulting in a gradual decrease in red emission of UCNPs. The fluorescence response of the system is linear with the concentrations of GSH and Cd 2+ in a wide range of concentrations, with low detection limits of 0.016 μM and 0.059 μM, respectively. Furthermore, the nanosensor demonstrates high selectivity for GSH and Cd 2+ detection and can be applied for the detection of GSH in human plasma and Cd 2+ in drinking water .
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MICROCHEMICAL JOURNAL
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2024
·
IF 4.9
Lili Yuan,Yongkang Yan,Yiyue Tang,Xueer Huang,Jiajing Liao,Jianmei Zou,Jinfang Nie,Lang Zhang,Shan Liao,Yun Zhang
This study initially reports a distance-based quantitative assay of pyrophosphate ion (PPi) based on analyte-triggered decomposition of metal–organic framework (MOF) in microfluidic paper-based analytical devices (µPADs). The µPADs were created using a mini-cutter machine and a home-use hot-pressing machine for loading one type of MOF of NH 2 -MIL-88 (Fe) prepared with Fe 3+ and fluorescent ligand of 2-aminoterephthalic acid (NH 2 -BDC). Upon sample introduction, the PPi could compete with NH 2 -BDC to bind Fe 3+ , leading to disintegration of the MOF and releasing of the fluorescent ligand in paper channel. The length (distance) of the NH 2 -BDC’s flow trace, when irradiated by a money tester pen, is proportional to the PPi level. The results show that the developed method only requires a ruler to linearly quantify PPi in a concentration range of 0–1000 μM, with a limit estimated to be ∼0.25 μM. Furthermore, recovery of PPi in orange juice and human urine was between 95.72 and 108.11 %, further validating its high detection accuracy. The fabrication method for µPADs offers many attractive advantages kike simplicity, batch production capability and low cost. Moreover, to our knowledge, this may be the first report of a portable quantitative MOF-based PPi assay with distance-based readout in µPADs.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Wenqi Zhao,Yue Qiao,Hang Jia,Yu Zhang,Enmao Zhang,Xigao Jian,Cheng Liu
The interfacial bonding between carbon fiber (CF) and the matrix in carbon fiber-reinforced high-performance thermoplastic (CFRHPTP) composites is weak, owing to the chemical inertness of the CF surface and nonreactivity of the thermoplastic resin. Hence, the applications of these composites are severely limited. In this study, a 2D GO/3D NH 2 -UiO-66 nanohybrid coating was hierarchically assembled via a two-step method. First, GO was assembled on CF (G-CF) via electrophoretic deposition to provide nucleation sites, and the NH 2 -UiO-66 was assembled in situ on the G-CF surface to obtain modified CF (G-N-CF) via electrochemical deposition. The chemical compositions, surface morphologies, and wettabilities of the CFs were systematically analyzed. Using poly(bisphthalazinone ether sulfone ketone) (PBPESK) as a matrix, a series of CF/PBPESK composites were prepared using G-N-CF, G-CF, and D-CF. The flexural strength and interlaminar shear strength of the G-N-CF-2/PBPESK composite increased by 28.5% and 48.3%, respectively, compared with those of the D-CF/PBPESK composite. The interfacial failure mechanism changed from adhesive failure to cohesive failure after treating CF with the 2D GO/3D NH 2 -UiO-66 nanohybrid coating. This study provides an effective strategy for the interphase design of CFRHPTP composites based on multiple physical and chemical interactions.
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JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
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2024
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IF 4.1
Jingjing Chen,Zhixiang Li,Xiaoqi Li,Yingxiang Du
A fluorescence sensor was developed based on NH 2 -MIL-101(Fe) and silicon-doped carbon quantum dots for the analysis of copper ions. Copper ions enhanced the fluorescence intensity of doped silicon-carbon quantum dots and decreased the intensity of NH 2 -MIL-101(Fe). The addition of copper ions resulted in fluorescence resonance energy transfer, which caused a reverse change in the fluorescence signal. The sensor based on the above mechanism can eliminate false positive interference. The fluorescence sensing system had a remarkable linear range of 0.25–5 µM for copper ions and a detection limit of 11 nM. It was then applied to water samples, resulting in recoveries ranging from 95.43 % to 103.1 %. The successful construction of this optical sensor not only broadened the way to detect copper ions but also provided a new idea for the detection of other targets mediated by copper ions. Finally, an attempt was made to construct a smartphone-assisted colourimetric platforms to detect copper ions in daylight.
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JOURNAL OF CHROMATOGRAPHIC SCIENCE
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2024
·
IF 1.5
Song Lixin,Zhang Jian,Wang Mingyu,Huang Zhipeng,Zhang Yunxia,Zhang Xing,Liang Yutao,He Juan
A novel approach for the simultaneous separation of zearalenone (ZEN) and four types of aflatoxins (AFB1, AFB2, AFG1 and AFG2) from rice samples was presented. This approach utilized modified MIL-101(Cr)-NH2 as core, with molecularly imprinted polymers (MIPs) serving as the shell. The MIL-101(Cr)-NH2 was prepared via ring-opening reaction, while the imprinted polymers were synthesized using warfarin and 4-methylumbelliferyl acetate as co-pseudo template, ethylene glycol dimethacrylate as the cross-linker and azobisisobutyronitrile as initiator. The resulting co-pseudo-template-MIPs (CPT-MIPs) were thoroughly characterized and evaluated. Adsorption studies demonstrate that the adsorption process of CPT-MIPs follows a chemical monolayer adsorption mechanism, with imprinted factors ranging from 1.24 to 1.52 and selective factors ranging from 1.29 to 1.52. Self-made columns were prepared, and the method for separation was developed and validated. The limit of detections ranged from 0.12 to 2.09 μg/kg, and the limit of qualifications ranged from 1.2 to 6.25 μg/kg. To assess the reliability of the method, ZEN and AFs were spiked at three different levels, and the recoveries ranged from 79.53 to 94.58%, with relative standard deviations of 2.90–5.78%.
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SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY
·
2025
·
IF 3.8
Kaiqiang Wang,Xiaoyan Duan,Ye Tian,Hong Lin,Limin Cao,Jianxin Sui
In this work, a novel method for sensitive detecting heavy metal Pb (II) in aquatic products was developed using UiO-66-NH 2 @tannic acid (UiO-66-NH 2 @TA) solid-phase extraction combined with laser-induced breakdown spectroscopy (LIBS). UiO-66-NH 2 @TA adsorbent could effectively extract Pb (II) from the digestive solution of aquatic products. Characterization of the morphology of the adsorbent was performed using transmission electron microscopy and scanning electron microscopy. The optimal experimental conditions for LIBS detection, including sample preparation, substrate type, laser energy, and delay time, were investigated. The results showed that the strongest Pb I 405.7 nm spectral signal can be obtained by dripping UiO-66-NH 2 @TA adsorbent onto a silicon wafer for LIBS testing. The limit of detection and limit of quantification for Pb (II) in aqueous solution were 0.18 μg/mL and 0.61 μg/mL, respectively. The calibration curve demonstrated good sensitivity and accuracy for Pb (II) detection with a correlation coefficient of 0.9905. Spiked recovery experiments on large yellow croakers and scallops yielded recovery rates of 75.25 % - 99.08 %, which was consistent with the results from atomic absorption spectrometry. This study underscores the potential of the solid-phase extraction combined with laser-induced breakdown spectroscopy for practical application in food safety monitoring, demonstrating its effectiveness and reliability in detecting Pb (II) in aquatic products.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
·
IF 4.9
Yuxin Yuan,Quanlan Liao,Tianxiang Zhao
Metal-organic frameworks (MOFs) have been hybridized with other functional materials, such as ionic liquids, covalent organic frameworks (COFs), and metallic nanoclusters, to fabricate composite materials. These composites possess the structural characteristics of their individual components and exhibit synergistic properties. In this work, we demonstrate the synthesis of core-shell structure UiO-66-NH 2 @PILs-x composite materials by encapsulating MOFs within ionic polymers (PILs) with varying thicknesses of PILs shell. These hybrid materials serve as bifunctional catalysts for the conversion of CO 2 into cyclic carbonates under solvent- and additive-free conditions through a synergistic catalytic effect facilitating the conversion of CO 2 into cyclic carbonates under solvent- and additive-free conditions through synergistic catalytic effect, exhibiting superior catalytic performance and excellent recyclability. This MOFs-based composite material provides a competitive approach for CO 2 catalytic conversion.
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CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Haojie Zeng,Qi Wang,Dingyu Xing,Jiajia Yuan,Feiyun Sun
To solve the freshwater dilemma, photothermal membrane distillation (PMD) has become a promising and sustainable method for desalination and wastewater purification. Ti 3 C 2 T x has attracted much attention in the field of Janus PMD membrane preparation due to its hydrophilic surface and high photothermal conversion efficiency. However, the shortcomings of easy stacking and surface light reflection limit its application. In this work, electrostatic adsorption self-assembly between Ti 3 C 2 T x and UiO-66-NH 2 by pH adjusting is designed, and the Ag-modified Ti 3 C 2 T x aims to significantly improve the photothermal conversion efficiency-Ag@Ti 3 C 2 T x /UiO-66-NH 2 membrane. Compared to the origin Ti 3 C 2 T x membrane, the photothermal layer containing UiO-66-NH 2 contributes to the unimpeded transport of water, and this 3D photothermal layer structure can maximize the capture and absorption of light, which contributes to enhanced high light absorption, photothermal conversion ability and more efficient mass transfer. Thus, a consistently high vapor flux of 1.13 kg/m 2 h and photothermal efficiency over 77.3 % were synchronously obtained, under one solar irradiation. Specifically, Ag@Ti 3 C 2 T x /UiO-66-NH 2 membrane meanwhile exhibits commendable water permeate production and high stability in anti-scaling tests, as well as reliable physical stability, which offers great application potential in PMD process. Our work provides a novel strategy for constructing PMD membrane with stably enhanced mass transfer and photothermal properties to satisfy real application.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Huidong Wang,Ziyu Gao,Jianmin Sun
Finding robust combination modes between ionic liquids and MOFs is still a challenge. In this work, using a simple one step-synthesis method, the ionic liquid was grafted onto MOF without any additives, and the binding mode of the two was characterized by means of XPS, FT-IR, TGA, SEM etc. It was found that the carboxyl group in the ionic liquid bonded with the amino group in MOF to form an amide bond. Thus, a novel stable composite material MIL-101-NH 2 -1-carboxypropyl-3-methylimidazolium bromine (1-C-3-M@MIL-101-NH 2 ) was synthesized. This composite employed as a catalyst for CO 2 cycloaddition demonstrated excellent catalytic activity, achieving a target product PC (Propylene carbonate) yield of 91.7 % under the conditions of 80 °C, 1.0 MPa, and a reaction time of 4 h, without the addition of any co-catalysts or solvents. The good catalytic activity was benefit from the synergistic effect of Lewis acidic Cr centers and nucleophilic Br - , as well as the high specific surface area and good CO 2 affinity of 1-C-3-M@MIL-101-NH 2 . In addition, owing to this robust bonding configuration, the catalyst can be recycled up to five times without losing activity. It is a potential catalyst for CO 2 capture and conversion.
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JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Fahang Xu,Qianqian Zhang,Rushun An,Ling Li,Limin Zhou
A novel Z-scheme 3D flower-like NH 2 -UIO-66/BiOCl composite was fabricated by a facile solvothermal method. The structural characterization results demonstrate that NH 2 -UIO-66 is embedded on the smooth surface of the flower-like BiOCl, forming a tight contact interface. As a visible light collector, NH 2 -UIO-66 expands the optical absorption range of BiOCl, which is confirmed by the UV-Vis diffuse reflectance spectra (DRS). By combining UV-Vis DRS, Mott-Schottky (MS) plots and VB-XPS, a well-matched band structure between NH 2 -UIO-66 and BiOCl is obtained. Photoelectrochemical characterizations indicate that the synergistic effect between NH 2 -UIO-66 and BiOCl interfaces facilitates the separation and transfer of photogenerated electron-hole pairs. In the case of photocatalytic performance experiments, the removal efficiency of the prepared NU66/BOC composites for TC-HCl was higher than either NH 2 -UIO-66 or BiOCl under simulated solar irradiation. NU66/BOC-20 exhibited the best performance with K app value (0.01269 min −1 ), which is 84 and 3 times more than the pristine NH 2 -UIO-66 (0.00015 min −1 ) and BiOCl (0.00410 min −1 ), respectively. In addition, NU66/BOC-20 composite demonstrates remarkable stability with a TC-HCl removal rate of 83% in the third cycle. The radical quenching experiments indicate that the primary active species is superoxide radicals (·O 2 − ) while holes (h + ) play a role to some extent. Based on the above experimental results and in-situ irradiated XPS , Z-scheme was proposed to explain the electron transfer pathway in the photocatalytic process.
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MICROCHIMICA ACTA
·
2020
·Vol. 187
·期 8
·1-9
·
IF 6.232
Li Jingxian,Jiang Ding,Shan Xueling,Wang Wenchang,Chen Zhidong
A novel “off-on” electrochemiluminescence (ECL) aptasensor based on ECL resonance energy transfer (RET) system from 3,4,9,10-perylenetetracar-boxylic acid/the metal-organic frameworks NH 2 -MIL-125(Ti) (PTCA/NH 2 -MIL-125) to Au nanoparticles (Au NPs) was put forward for microcystin-LR (MC-LR) assay. The electrochemiluminescence (ECL) emission spectra of PTCA/NH 2 -MIL-125 show excellent spectral overlap with the UV-vis absorption spectrum of Au NPs. A linear response ranging from 10 fM (9.95 × 10 −6 μg L −1 ) to 0.1 μM (99.5 μg L −1 ) was obtained, and the detection limit was 3.6 fM (3.58 × 10 −6 μg L −1 ) under optimal conditions at a potential of − 1.6 V ( S/N = 3). Besides, the prepared ECL-RET MC-LR aptasensor exhibited good selectivity and stability.
Graphical abstract
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危险品化学品经营许可证（带存储）