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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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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MICROCHEMICAL JOURNAL
·
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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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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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
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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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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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高影响因子
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2022
·Vol. 46
·期 15
·23480-23492
·
IF 4.672
Lingxin Meng,Zhenguo Zhang,Mengchi Ju,Jingmei Xu,Zhe Wang
Summary Organic-inorganic modification by incorporating metal-organic frameworks to copolymers is one strategy to advance the properties of membranes. Here, the imidazole-loaded MIL-101-NH 2 (Im@MIL-101-NH 2 ) was prepared and chemically anchored onto sulfonated poly (arylene ether ketone sulfone) containing carboxyl groups (C-SPAEKS). The chemical stabilities, mechanical properties, and dimensional stabilities of compound membranes were increased. The highest tensile strength of C-SPAEKS-IM6 reach to 105.36 MPa. The weight retention rate of hybrid membranes was still higher than 90% after the oxidation stability test at 80°C. Furthermore, the introducing Im@MIL-101-NH 2 could construct new proton transport paths, and the amphiphilic imidazole molecules embedded inside Im@MIL-101-NH 2 could act as proton carriers. The C-SPAEKS-IM6 showed a maximum proton conductivity of 0.082 S cm −1 at 90°C. Additionally, the peak power density of C-SPAEKS-IM6 was 171.52 mW cm −2 . To sum up, this series of membranes have latent capacity in the application of fuel cells. Im@MIL-101-NH 2 was anchored on polymer backbones via the Hinsberg reaction. Chemical bonds between MOFs and polymer chains improved compatibility of two phases. Cross-linking structure enhanced the mechanical property and oxidative stability. The sulfonamide groups could devote protons and transport it to MOFs.
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Journal of Environmental Sciences
·
2023
·
IF 6.9
Lei Zheng,Lixia Sun,Jiangbo Qiu,Junling Song,Luyi Zou,Yue Teng,Yongzhong Zong,Hongyan Yu
The coexistence of inorganic and organic contaminants is a challenge for real-life water treatment applications. Therefore, in this research, we used NH 2 -MIL-125(Ti) to evaluate the single adsorption of hexavalent chromium (Cr(VI)) or Rhodamine B (RhB) in an aqueous solution and further investigate simultaneous adsorption experiments to compare the adsorption behavior changes. The main influencing factors, for example, reaction time, initial concentration, reaction temperature, and pH were studied in detail. In all reaction systems, the pseudo-second-order kinetic and Langmuir isotherm models were well illuminated the adsorption progress of Cr(VI) and RhB. Thermodynamic studies showed that the adsorption process was spontaneous and endothermic. As compared to the single system, the adsorption capacity of Cr(VI) in the binary system gradually decreased as the additive amount of RhB increased, whereas the adsorption capacity of RhB in the binary system was expanded brilliantly. When the binary reaction system contained 100 mg/L Cr(VI), the removal rate of RhB increased to 97.58%. The formation of Cr(VI)-RhB and Cr(III)-RhB complexes was the cause that provided facilitation for the adsorption of RhB. These findings prove that the interactions during the water treatment process between contaminants may obtain additional benefits, contributing to a better adsorption capacity of co-existing contaminant.
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BIOSENSORS & BIOELECTRONICS
·
2021
·
IF 10.618
Yukun Yang,Wenyan Yan,Xiaomin Wang,Ligang Yu,Jinhua Zhang,Baoqing Bai,Caixia Guo,Sanhong Fan
In this work, a molecularly imprinted photoelectrochemical (MIP-PEC) sensor based on a novel PEC composite of metal-organic frameworks (MOFs) and TiO 2 (NH 2 -MIL-125(Ti)–TiO 2 ) was established for the ultrasensitive and selective detection of oxytetracycline (OTC). This is the first attempt of applying MOFs in the construction of MIP-PEC sensor. The NH 2 -MIL-125(Ti)–TiO 2 was synthesized by a simple one-step solvothermal method and modified onto the surface of indium tin oxide (ITO) electrode as the photosensitive layer. Subsequently, molecularly imprinted polymer (MIP) was modified as recognition element by electropolymerization . The NH 2 -MIL-125(Ti)–TiO 2 showed an enhanced photocurrent response due to stronger light absorption capacity and matched energy band. Furthermore, MIP greatly improved the selectivity and sensitivity of the constructed PEC sensor. The photocurrent response of the MIP-PEC sensor was reduced after OTC recognition because the specific binding of OTC to the imprinted cavities blocked the electron transfer of the electrode. Under optimal experimental conditions, the MIP-PEC sensor exhibited a wide detection range from 0.1 nM to 10 μM with a low limit of detection (LOD) of 60 pM, as well as certain reproducibility, stability and good applicability in real samples. The proposed sensor provides ideas for the application of MOFs in the construction of PEC sensors and will offer an alternative method for the detection of other pollutants in the field of food safety.
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