JOURNAL OF THE ELECTROCHEMICAL SOCIETY
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2019
·Vol. 166
·期 4
·B193
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IF 3.12
Sheying Dong,Hao Cui,Dandan Zhang,Mengmeng Tong
Several reports reveal that high level of C-reactive protein (CRP) in serum enhances venture of diabetes. In this article, we presented a platform which blended Zr(IV)-organic framework with 2,5-thiophenedicarboxylate ligand (Zr-tdc) and ionic liquid (IL) to form a steady composite membrane on the carbon paste electrode (CPE). The platform was applied to CRP and glucose biosensors which were connected with diabetes and displayed well performances. Firstly, a sensitive immunosensor for label-free and direct detection of CRP was developed at Zr-tdc/IL modified electrode. Under optimal conditions, differential pulse voltammetry (DPV) response showed the low detection limit of CRP was 0.2 ng/mL. Secondly, the glucose biosensor immobilized glucose oxidase (GOX) was constructed and studied by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and amperometric response. The Michaelis–Menten constant (KM) of immobilized GOX was 0.16 mM, and the detection limit was 2.7 μM for glucose. Two novel biosensors displayed well selectivity, stability and lower detection limit. This work improved the performance of electrochemical sensing and expand the utilization of the material by carrying on the effective immobilization of enzyme and antibody.
研究领域:
生物医学工程
·
分析化学
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高影响因子
ELECTROPHORESIS
·
2018
·Vol. 39
·期 20
·2619-2625
·
IF 2.569
Pingxiu Tang,Rong Wang,Zilin Chen
The high stability and other properties of Zr(IV)-based metal organic frameworks(MOFs) make it a promising choice for chromatographic separation, while the application in open-tubular capillary electrochromatography (OT-CEC) separation has not been explored yet. Herein, we report the first example of the in-situ growth of UiO-66-NH 2 onto the capillary for open-tubular capillary electrochromatography. UiO-66-NH 2 consists of ZrCl 4 and 2-amino-1,4-benzenedicarboxylic acid, which is highly porous and stable in a variety of solvents. The prepared UiO-66-NH 2 modified capillary was characterized by scanning electron microscopy (SEM) and Fourier transform infrared spectra (FT-IR), and the results confirmed the successful growth of the UiO-66-NH 2 . The baseline separation of chlorobenzenes, phenoxyacids and two groups of phenols was achieved owing to the combined interaction of π-π interaction, hydrophobic interaction, molecular sieve effect, electrophoretic migration and hydrogen-bonding interaction etc. Besides, the prepared capillaries showed good reproducibility, with relative standard deviations (RSDs) for intra-day, inter-day and column-to-column runs in the range of 1.38–2.60%, 3.39–4.05%, and 3.47–5.03%, respectively. Our work indicates Zr(IV)-based MOFs are promising materials as stationary phase in CEC separation.
研究领域:
分析化学
·
材料科学
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INORGANIC CHEMISTRY COMMUNICATIONS
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2026
·
IF 5.9
Shuyan Qi,Yang Wang,Ling Guan,Xu Hu,Haiyang Li
This study addresses antibiotic water pollution by synthesizing Zr-doped Bi₂₄O₃₁Cl₁₀ (Bi₂₄(₁₋ₓ)Zr₁₈ₓO₃₁Cl₁₀) photocatalysts via hydrothermal method for tetracycline hydrochloride (TC-HCl) removal. Zr doping ratios (6–14%) were systematically investigated, with the optimal BZOC4 (12% Zr) degrading 91.24% of 20 mg/L TC-HCl within 120 min under 500 W xenon lamp irradiation (pH = 9). Its reaction rate constant (0.0239 min −1 ) is triple that of pristine Bi₂₄O₃₁Cl₁₀. Zr doping reduces the band gap from 3.12 eV to 2.8 eV, improves visible light utilization (absorption edge red-shifted to 525 nm), accelerates electron transfer, and reduces e − /h + recombination—supported by UV –Vis DRS, PL, and electrochemical tests. Superoxide radicals (O₂ − ·) and holes (h + ) are primary active species, confirmed by radical trapping and ESR. TOC analysis confirms 32.4% mineralization of TC-HCl to CO₂ and H₂O.This work offers new design strategies for bismuth halide-based photocatalysts in antibiotic remediation by integrating structural regulation and electronic modulation via Zr doping.
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Journal of Environmental Sciences
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2022
·
IF 6.796
Ping Chen,Yalan Wang,Xiaoqin Zhuang,Haijin Liu,Guoguang Liu,Wenying Lv
Zr-based metal-organic frameworks (MOFs) have been developed in recent years to treat heavy metals, e.g. hexavalent chromium Cr 6+ pollution, which damages the surrounding ecosystem and threaten human health. This kind of MOF is stable and convenient to prepare, but has the disadvantage of low adsorption capacity, limiting its wide application. To this end, a novel formic acid and amino modified MOFs were prepared, referred to as Form-UiO-66-NH 2 . Due to the modification of formic acid, its specific surface area, pore size, and crystal size were effectively expanded, and the adsorption capacity of Cr 6+ was significantly enhanced. Under optimal conditions, Form-UiO-66-NH 2 exhibited an excellent adsorption capacity (338.98 mg/g), ∼10 times higher than that reported for unmodified Zr-based MOFs and most other adsorbents. An in-depth study on the photoelectronic properties and pH confirmed that the adsorption mechanism of Form-UiO-66-NH 2 to Cr 6+ was electrostatic adsorption. After modification, the improvement of Cr 6+ adsorption capacity by Form-UiO-66-NH 2 was attributed to the expansion of its specific surface area and the increase in its surface charge. The present study revealed an important finding that Form-UiO-66-NH 2 elucidated selective adsorption to Cr 6+ in mixed wastewater containing toxic heavy metal ions and common nonmetallic water quality factors . This research provided a new acid and amino functionalization perspective for improving the adsorption capacity of Zr-based MOF adsorbents while simultaneously demonstrating their pertinence to target contaminant adsorption.
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PubMed
高影响因子
JOURNAL OF CATALYSIS
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2022
·
IF 8.047
Haoyu Li,Pengfei Wu,Xianquan Li,Jifeng Pang,Shangru Zhai,Tao Zhang,Mingyuan Zheng
High-performance MFI zeolite supported nickel catalysts were prepared by the ammonia evaporation method for maleic anhydride (MA) conversion to γ-butyrolactone (GBL). According to comprehensive characterizations, the Ni catalysts possessed petal-like morphology and hierarchical structures with meso and micro pores. Nickel species were highly dispersed on the silica support and generated abundant Lewis acid sites (LAS), which effectively activated carbonyl groups in the reactant and accounted for the high activity in MA hydrogenation. Zr species hydrothermally introduced into the catalyst increased the number of LAS and decreased the apparent activation energy for the reaction. The highest GBL yield reached 95.6% over 40Ni-2Zr-MFI with the assistance of 3A zeolite to in-situ remove water byproduct. The catalyst showed reasonably good stability in five-cycle operation thanks to the strong interaction between Ni and support. The reaction route for MA hydrogenation was investigated, in which succinic anhydride (SA-A) served as the major reaction intermediate for GBL formation.
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RENEWABLE ENERGY
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2021
·
IF 8.001
Hui Li,Yongbo Wang,Xiaoling Ma,Min Guo,Yan Li,Guoning Li,Ping Cui,Shoujun Zhou,Mingzhi Yu
Ca 2+ ion leaching and poor pore structure are obstacles of CaO for biodiesel production . To this end, a typical Zr–based metal organic framework, UiO–66(Zr) is adopted to support calcium acetate to prepare CaO/ZrO 2 catalyst. For comparison, catalyst precursor is activated in nitrogen (UCN) and air (UCA) atmosphere, respectively. Preparation factors including calcium acetate addition and activation temperature are evaluated. Moreover, effects of transesterification parameters on oil conversion are investigated and the optimized parameters are further used to examine catalyst reusability . Meanwhile, catalysts are characterized with TG, XRD, XPS , FTIR, Hammett indicator titration, N 2 adsorption and desorption. Results reveal UCN calcined at 650 °C (UCN650) and UCA calcined at 700 °C (UCA700) separately exhibits the best catalytic performance. The maximum conversion of 96.99% is achieved by UCN650 with catalyst amount of 6 wt% and molar ratio of methanol to oil of 9 at 65 °C for 60 min. Even after being used 3 cycles, conversion of 92.76% is still achieved by UCN650. By contrast, UCA700 shows lower conversion of 92.94% at the first cycle with catalyst amount of 8 wt% and molar ratio of methanol to oil of 9 at 65 °C for 60 min.
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JOURNAL OF SOLID STATE CHEMISTRY
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2021
·
IF 3.498
He Huang,Zhao-Yang Liu,Shuang-Bao Li,Juan Zhu,Bao-Xu Jiang,Yu-Teng Zhang
In this work, an amino-functionalized Zr-based metal-organic polyhedron (denoted ZrT-1-NH 2 ), synthesised under the solvothermal method , has been selected as the photocatalyst for the removal of tetracycline (TC). The effects of adding dosages, pH values of TC degradation efficiency were investigated, and the results showed that this material was better effective in photocatalysis degradation of tetracycline antibiotic. In addition, the trapping experiments reveal that hydroxyl radical (•OH) and superoxide radical (•O 2 − ), serving as active species, play major roles in the photocatalytic process. Furthermore, a possible mechanism for the photocatalytic process is proposed. This work presents that zirconium-based metal-organic polyhedra (Zr-MOPs) may be promising photocatalysts for the removal of antibiotics in wastewater.
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APPLIED CATALYSIS B-ENVIRONMENTAL
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2021
·
IF 19.503
Zhou Fang,Zheng Deng,Xinyi Wan,Zhuoyi Li,Xu Ma,Shabab Hussain,Zhizhen Ye,Xinsheng Peng
Although Keggin-type polyoxometalates (POMs) have shown nice catalytic efficiency for CO 2 cycloaddition reaction, they suppressed by their low recycling ability and energy costing of direct heating. Decorated POMs into solid porous support with photothermal property is an alternative but promising way for solar-driven reaction. Herein, phosphomolybdate molecularly decorated ferrocene-based Zr-Fc (PMo 12 @Zr-Fc) metal organic frameworks (MOFs) nanosheet, which has outstanding photothermal conversion ability, are synthesized and used to catalyze cycloaddition reaction with styrene oxide and CO 2 under simulated sunlight. At light intensity of 0.4 W/cm 2 , the temperature of reactor with PMo 12 @Zr-Fc MOFs rapidly rises and up to 80 ℃, and 88.05 % yield of product is achieved. This PMo 12 @Zr-Fc catalyst also demonstrates nice recycling stability. The solar-driven cycloaddition process may exploit a new avenue for reusing CO 2 .
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2020
·
IF 16.683
Liam John France,Wan Li,Yanke Zhang,Wentao Mu,Zhihang Chen,Junjun Shi,Qiang Zeng,Xuehui Li
A series of Fe-Zr mixed-metal oxides were prepared and examined for the simultaneous reduction of NO and SO 2 with CO. The catalyst containing 40 mol% exhibited near-complete conversion of both pollutants at a minimum temperature of 350 °C and a GHSV of 90,000 h −1 . The addition of Fe 3+ to ZrO 2 decreased the crystallinity of the latter phase and significantly enhanced surface area. Concentrations of 30 mol% or greater produced segregated FeO x phases, which affected catalytic performance in distinctly different ways: supported Fe 3+ (30 mol%) possessed similar activity to doped Fe 3+ ; α-Fe 2 O 3 (50 mol%) inhibited activity due to its’ lower reducibility; an amorphous phase (40 mol%) promoted iron-weighted areal activity. A complete identification of the ambiguous component was not successfully established, but the obtained properties revealed that it exhibited weaker interaction with the support and had a size greater than that of oligomeric-Fe 2 O 3 yet smaller than 3 nm.
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ANALYTICA CHIMICA ACTA
·
2020
·
IF 5.977
Zhengjie Hu,Ximing Wang,Xuwei Chen
Highly selective adsorption of protein species interested from complicated biological samples is an extremely important prerequisite for in-depth proteomic analysis. Herein, a novel dual-hydrophilic material is fabricated by grafting Zr-based metal-organic framework (Zr-MOF) onto the surface of magnetic microspheres , and subsequent modifying with fructose-1,6-bisphosphate (FBP) molecules by taking advantage of multivalent binding between the phosphate backbone of FBP and Zr centers. Owing to the favorable dual-hydrophilicity derived from the abundant amino groups in Zr-MOF and the hydroxyl groups in FBP molecules, the obtained magnetic microspheres (mMOF-FBP) provide high adsorption efficiency, favorable selectivity and excellent capturing capacity (555.6 mg g −1 ) towards immunoglobulin G (IgG). The captured IgG could be collected from the mMOF-FBP by using 0.5% (m/v) NH 3 ·H 2 O as elution reagent with a recovery of 88.4%. The dual-hydrophilic microspheres demonstrate their practicability by selective isolation of IgG from human serum.
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PubMed
高影响因子
ACS Applied Materials & Interfaces
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2020
·
IF 8.758
Zheng Deng,Chao Fang,Xu Ma,Xiang Li,Yu-Jia Zeng,Xinsheng Peng
Metal–organic frameworks (MOFs) have been identified as promising materials for the delivery of therapeutics to cure cancer owing to their intrinsic porous structure. However, in a majority of cases, MOFs act as only a delivery cargo for anticancer drugs while little attention has been focused on the utilization of their intriguing physical and chemical properties for potential anticancer purposes. Herein for the first time, an ultrathin (16.4 nm thick) ferrocene-based MOF (Zr-Fc MOF) nanosheet has been synthesized for synergistic photothermal therapy (PTT) and Fenton reaction-based chemodynamic (CDT) therapy to cure cancer without additional drugs. The Zr-Fc MOF nanosheet acts not only as an excellent photothermal agent with a prominent photothermal conversion efficiency of 53% at 808 nm but also as an efficient Fenton catalyst to promote the conversion of H2O2 into hydroxyl radical (•OH). As a consequence, an excellent therapeutic performance has been achieved in vitro as well as in vivo through this combinational effect. This work aims to construct an “all-in-one” MOF nanoplatform for PTT and CDT treatments without incorporating any additional therapeutics, which may launch a new era in the investigation of MOF-based synergistic therapy platforms for cancer therapy.
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PubMed
高影响因子
Journal of Cleaner Production
·
2022
·
IF 11.072
Liyu Chen,Jiaxin Yang,Yifan Zhang,Shaohua Wu,Youjian Yang,Wenju Tao,Zhaowen Wang
The synthesis of an Al–Zr master alloy in KF–AlF 3 –ZrO 2 molten salt by combining aluminothermic reduction and molten salt electrolysis processes was studied. The effects of reduction parameters such as stirring, reaction time, Al/ZrO 2 mass ratio and temperature on the Zr content and Zr recovery rate were studied and optimized. Under the optimal conditions of stirring, reaction time of 4 h, Al/ZrO 2 mass ratio of 3 and temperature of 960 °C, an Al–Zr master alloy can be obtained with a Zr content of 6.78 wt% and Zr recovery rate of 29.85%. The characterization results of the alloy show that the main phases contain Al and Al 3 Zr. And the Al 3 Zr appears as long rod-shaped or tetragonal shapes, which influenced by the Zr content and cooling rate. In addition, the reduced molten salt is electrolyzed to further extract Zr from the molten salt. The results show that the Zr remaining in the molten salt is completely recovered with a Zr recovery rate up to 94.72%. This two-step process is feasible for the large-scale extraction of Zr in molten salts to produce Al–Zr master alloys.
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