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Chatzimitakos T, Vasilas A, Stalikas C. Layered Double Hydroxide/Graphene Quantum Dots as a New Sorbent for the Dispersive Solid-Phase Microextraction of Selected Benzophenones, Phenols, and Parabens. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27238388. [PMID: 36500480 PMCID: PMC9738325 DOI: 10.3390/molecules27238388] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 11/22/2022] [Accepted: 11/25/2022] [Indexed: 12/04/2022]
Abstract
In this study, the synthesis of a layered double hydroxide (LDH) composite with graphene quantum dots (GQDs) and its utilization for the development of a dispersive solid-phase extraction procedure are described. To this end, a carbonate-free Mg-Al LDH was synthesized. The development of the composite material made feasible the use of GQDs in a sample preparation procedure, while the incorporation of the GQDs in the LDH structure resulted in an 80% increase in extraction efficiency, compared to the bare LDH. As a proof of concept, the composite material was used for the development of an analytical method for the extraction, and preconcentration, of benzophenones, phenols, and parabens in lake water using high-performance liquid chromatography, coupled to a diode array detector. The analytical method exhibits low limits of quantification (0.10-1.33 μg L-1), good recoveries (92-100%), and satisfactory enrichment factors (169-186). Due to the abovementioned merits, the easy synthesis and simple extraction, the developed method can be used for the routine analysis of the target compounds.
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Wang X, Cheng B, Zhang L, Yu J, Li Y. Synthesis of MgNiCo LDH hollow structure derived from ZIF-67 as superb adsorbent for Congo red. J Colloid Interface Sci 2022; 612:598-607. [PMID: 35016020 DOI: 10.1016/j.jcis.2021.12.176] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 12/25/2021] [Accepted: 12/27/2021] [Indexed: 11/30/2022]
Abstract
Adsorption materials with large specific surface area and porous structures exert a beneficial impact on improving the adsorption performance. In this work, MgNiCo LDH hollow structure (MNC HS) is fabricated through a simple one-step solvothermal method using ZIF-67 as the sacrificial template. Electron microscopy shows that the MNC HS retains the dodecahedral shape of ZIF-67. The as-prepared sample exhibits efficient adsorption for Congo red (CR) in water, which is due to the hierarchical structure and large specific surface area that provides more adsorption sites and electrostatic interaction. The CR adsorption process fits the pseudo-second-order model better by kinetics simulation; while Langmuir model is more accurate than Freundlich model in describing the adsorption isotherms of CR. The maximum adsorption capacity calculated by the Langmuir model can reach 1194.7 mg g-1, which is much higher than that of the sample MgNiCo LDH (MNC) synthesized by conventional methods. The cycle tests also show that the as-prepared adsorbent has good stability and recycling ability.
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Affiliation(s)
- Xing Wang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, PR China
| | - Bei Cheng
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, PR China
| | - Liuyang Zhang
- Laboratory of Solar Fuel, Faculty of Materials Science and Chemistry, China University of Geosciences, 388 Lumo Road, Wuhan 430074, PR China.
| | - Jiaguo Yu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, PR China; Laboratory of Solar Fuel, Faculty of Materials Science and Chemistry, China University of Geosciences, 388 Lumo Road, Wuhan 430074, PR China.
| | - Youji Li
- College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, Hunan, PR China
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Li H, Du C, Liu M, Zeng J. Headspace Gas Chromatographic Method for Carbonate Content Determination in Layered Double Hydroxides. ChemistrySelect 2021. [DOI: 10.1002/slct.202102054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Hailong Li
- School of Light and Industry and Engineering South China University of Technology Wushan road, Tianhe district Guangzhou 510640 China
| | - Chao Du
- School of Light and Industry and Engineering South China University of Technology Wushan road, Tianhe district Guangzhou 510640 China
| | - Mengru Liu
- School of Light and Industry and Engineering South China University of Technology Wushan road, Tianhe district Guangzhou 510640 China
| | - Jingshan Zeng
- School of Light and Industry and Engineering South China University of Technology Wushan road, Tianhe district Guangzhou 510640 China
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Liv L, Yener M, Karakuş E. A novel voltammetric method for the sensitive and selective determination of carbonate or bicarbonate ions by an azomethine-H probe. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2021; 13:1925-1929. [PMID: 33913940 DOI: 10.1039/d1ay00240f] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Our study involved a simple, sensitive voltammetric method of determining either carbonate or bicarbonate ions independently with azomethine-H and a disposable pencil graphite electrode. The reduction of azomethine-H-carbonate complexes at approximately -930 mV formed in acetic acid-acetate buffer solution (pH: 4.25) was evaluated as a response. Among the results, the limits of detection and analytical ranges for carbonate ions were 3.7 μg L-1 and 9.9-700.0 μg L-1 and for bicarbonate ions were 9.0 μg L-1 and 35.0-700.0 μg L-1, and the relative standard deviations for carbonate and bicarbonate ions ranged from 1.33% and 6.93% at different concentrations. After the proposed method was applied to water, sparkling water, seawater and baking powder samples, the results were statistically evaluated and compared with those obtained from the potentiometric auto-titration system. Last, the complex stoichiometry of both carbonate and bicarbonate ions was comprehensively investigated with fluorescence and 1H-NMR spectroscopy.
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Affiliation(s)
- Lokman Liv
- Electrochemistry Laboratory, Chemistry Group, The Scientific and Technological Research Council of Turkey, National Metrology Institute, (TUBITAK UME), Gebze, Kocaeli 41470, Turkey.
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Shkirskiy V, Keil P, Hintze-Bruening H, Leroux F, Vialat P, Lefèvre G, Ogle K, Volovitch P. Factors Affecting MoO4(2-) Inhibitor Release from Zn2Al Based Layered Double Hydroxide and Their Implication in Protecting Hot Dip Galvanized Steel by Means of Organic Coatings. ACS APPLIED MATERIALS & INTERFACES 2015; 7:25180-25192. [PMID: 26474129 DOI: 10.1021/acsami.5b06702] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Zn2Al/-layered double hydroxide (LDH) with intercalated MoO4(2-) was investigated as a potential source of soluble molybdate inhibitor in anticorrosion coatings for hot dip galvanized steel (HDG). The effect of solution pH, soluble chlorides, and carbonates on the release kinetics of the interleaved MoO4(2-) ions from the LDH powder immersed in solutions containing different anions was studied by X-ray diffraction, in situ attenuated total reflectance infrared (ATR-IR) spectroscopy, and inductively coupled plasma atomic emission spectroscopy (ICP-AES). The effect of the solution composition on the total release and the release kinetics was demonstrated. Less than 30% of the total amount of the intercalated MoO4(2-) was released after 24 h of the immersion in neutral 0.005-0.5 M NaCl and 0.1 M NaNO3 solutions whereas the complete release of MoO4(2-) was observed after 1 h in 0.1 M NaHCO3 or Na2SO4 and in alkaline solutions. The in situ ATR-IR experiments and quantification of the released soluble species by ICP-AES demonstrated the release by an anion exchange in neutral solutions and by the dissolution of Zn2Al/-LDH in alkaline solutions. The anion exchange kinetics with monovalent anions was described by the reaction order n = 0.35 ± 0.05 suggesting the diffusion control; for divalent anions, n = 0.70 ± 0.06 suggested the control by a surface reaction. Dissolution of Zn from coated HDG with and without Zn2Al/-MoO4(2-) fillers, leaching of MoO4(2-) from the coating, and the electrochemical impedance spectroscopy response of the coated systems were measured during the immersion in 0.5 M NaCl solutions with and without 0.1 M NaHCO3. Without carbonates, the release of soluble MoO4(2-) was delayed for 24 h with no inhibiting effect whereas with 0.1 M NaHCO3 the immediate release was accompanied by the immediate and strong inhibiting effect on Zn dissolution. The concept of controlling the inhibition performance of LDH hybrid coatings by means of the environment composition is discussed.
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Affiliation(s)
- V Shkirskiy
- PSL Research University, Institut de Recherche Chimie Paris, CNRS - Chimie-ParisTech, 11 rue Pierre et Marie Curie, Paris 75005, France
| | - P Keil
- BASF Coatings GmbH , Glasuritstrasse 1, 48165 Münster, Germany
| | | | - F Leroux
- Clermont Université, Université Blaise Pascal, Institut de Chimie de Clermont-Ferrand (ICCF, UMR-CNRS 6296), BP 80026, F-63171 Aubiere, France
| | - P Vialat
- Clermont Université, Université Blaise Pascal, Institut de Chimie de Clermont-Ferrand (ICCF, UMR-CNRS 6296), BP 80026, F-63171 Aubiere, France
| | - G Lefèvre
- PSL Research University, Institut de Recherche Chimie Paris, CNRS - Chimie-ParisTech, 11 rue Pierre et Marie Curie, Paris 75005, France
| | - K Ogle
- PSL Research University, Institut de Recherche Chimie Paris, CNRS - Chimie-ParisTech, 11 rue Pierre et Marie Curie, Paris 75005, France
| | - P Volovitch
- PSL Research University, Institut de Recherche Chimie Paris, CNRS - Chimie-ParisTech, 11 rue Pierre et Marie Curie, Paris 75005, France
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Lee JS, Jang J. Hetero-structured semiconductor nanomaterials for photocatalytic applications. J IND ENG CHEM 2014. [DOI: 10.1016/j.jiec.2013.11.050] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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