Kinetics of intercalation of fluorescent probes in magnesium–aluminium layered double hydroxide within a multiscale reaction–diffusion framework

Saliba, Daniel; Al-Ghoul, Mazen

doi:10.1098/rsta.2016.0138

Cited by 9 publications

(10 citation statements)

References 36 publications

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“…The metal centers of LDHs can be monometallic with divalent cations but are often bimetallic with a mixture of divalent (M 2+ ) and trivalent (M 3+ ) cations. Such LDHs follow the general formula [M 2+ 1−x + M 3+ x (OH) 2 ] x+ (A n− ) x/n •mH 2 O, where A n− is the anionic intercalant [15]. Common divalent metals include Ni 2+ , Co 2+ , Mg 2+ ; common trivalent metals include Al 3+ and Fe 3+ ; and common interlayer anions include CO 3 2− and NO 3 − .…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Layered Double Hydroxide-Based Electrochemical and Optical Sensors

Kim

Varga

Adhikari³

et al. 2021

Nanomaterials

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Layered double hydroxides (LDHs) have attracted considerable attention as promising materials for electrochemical and optical sensors owing to their excellent catalytic properties, facile synthesis strategies, highly tunable morphology, and versatile hosting ability. LDH-based electrochemical sensors are affordable alternatives to traditional precious-metal-based sensors, as LDHs can be synthesized from abundant inorganic precursors. LDH-modified probes can directly catalyze or host catalytic compounds that facilitate analyte redox reactions, detected as changes in the probe’s current, voltage, or resistance. The porous and lamellar structure of LDHs allows rapid analyte diffusion and abundant active sites for enhanced sensor sensitivity. LDHs can be composed of conductive materials such as reduced graphene oxide (rGO) or metal nanoparticles for improved catalytic activity and analyte selectivity. As optical sensors, LDHs provide a spacious, stable structure for synergistic guest–host interactions. LDHs can immobilize fluorophores, chemiluminescence reactants, and other spectroscopically active materials to reduce the aggregation and dissolution of the embedded sensor molecules, yielding enhanced optical responses and increased probe reusability. This review discusses standard LDH synthesis methods and overviews the different electrochemical and optical analysis techniques. Furthermore, the designs and modifications of exemplary LDHs and LDH composite materials are analyzed, focusing on the analytical performance of LDH-based sensors for key biomarkers and pollutants, including glucose, dopamine (DA), H2O2, metal ions, nitrogen-based toxins, and other organic compounds.

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Section: Introductionmentioning

confidence: 99%

Recent Advances in Layered Double Hydroxide-Based Electrochemical and Optical Sensors

Kim

Varga

Adhikari³

et al. 2021

Nanomaterials

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“…Another two endothermic peaks were observed at 350°C and 430°C due to dehydroxylation of Al-OH and Mg-OH, respectively. 43 These two processes ended at around 500 °C summing both a weight loss of 26.5 %. At temperatures above 500°C, it is known that the structure of LDH starts to collapse resulting in a mixture of Mg and Al oxides.…”

Section: Characterization Of Ldh-cipmentioning

confidence: 99%

Ciprofloxacin in Layered Double Hydroxides: Looking for the Best Synthesis Method

López

Luengo

Avena

2022

Journal of Pharmaceutical Sciences

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“…Please refer to previously published studies of the authors for a detailed description of the structure of the materials used here [8,14]. In recent years, Layered Double Hydroxides (LDHs) with intercalated fluorescent dyes have been widely studied and commonly synthesised via ion exchange [27][28][29] and reaction-diffusion [30] routes. Here we present the facile and easily tuneable synthesis of fluorescing LDHs (Fluo-LDH) via co-precipitation under supersaturation conditions.…”

Section: Introductionmentioning

confidence: 99%

Fluorescing Layered Double Hydroxides as Tracer Materials for Particle Injection during Subsurface Water Remediation

et al. 2020

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Nowadays, the contamination of groundwater and soils by highly hazardous and toxic chlorinated solvents is a global issue. Over the past years, different remediation strategies have been developed, involving injection of reactive solutions and/or particles. However, a major difficulty is the monitoring of injected particles during the injection and after secondary mobilisation by groundwater flow. This study is focussed on the development of directly traceable particles by combining fluorescein with Layered Double Hydroxides (LDHs). We present here the facile and easily tuneable synthesis of fluorescing LDHs (Fluo-LDH) via co-precipitation under supersaturation conditions. Their ability to mimic particle sizes of previously studied reactive LDHs, which proved to be able to adsorb or degrade chlorinated organic solvents from aqueous solutions, was investigated as well. Tests using a novel Optical Image Profiler (OIP) confirmed that the fluorescent LDHs can be easily detected with this tool. Even LDHs with the lowest amount of fluorescent dye were detectable. Together with the use of an OIP, which is capable of exciting the fluorescent material and collecting real-time pictures, this can provide a new, efficient, and cost-effective method for in situ tracing of injected particles in the subsurface.

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Kinetics of intercalation of fluorescent probes in magnesium–aluminium layered double hydroxide within a multiscale reaction–diffusion framework

Abstract: One contribution of 17 to a theme issue 'Multiscale modelling at the physics-chemistry-biology interface'.

Cited by 9 publications

References 36 publications

Recent Advances in Layered Double Hydroxide-Based Electrochemical and Optical Sensors

Recent Advances in Layered Double Hydroxide-Based Electrochemical and Optical Sensors

Ciprofloxacin in Layered Double Hydroxides: Looking for the Best Synthesis Method

Fluorescing Layered Double Hydroxides as Tracer Materials for Particle Injection during Subsurface Water Remediation

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