CuCoFe Layered Double Hydroxides as Laccase Mimicking Nanozymes for Colorimetric Detection of Pheochromocytoma Biomarkers

2022 ◽  
Author(s):  
Feng-Wei Huang ◽  
Ke Ma ◽  
Xiu-Wen Ni ◽  
Sheng-Lin Qiao ◽  
Kezheng Chen
Keyword(s):  
Layered Double Hydroxides ◽  
Colorimetric Detection ◽  
Biomarker Detection ◽  
Double Hydroxides ◽  
First Time ◽  
Colorimetric Biosensing ◽  
Poor Stability

Laccase catalyzed colorimetric biosensing approach is promising for pheochromocytoma biomarker detection yet suffer from enzyme poor stability and high cost for production. here we report for the first time an...

scholarly journals Development of an Immunosensor Based on Layered Double Hydroxides for MMR Cancer Biomarker Detection

2015 ◽  
Vol 14 (7) ◽  
pp. 688-693 ◽  
Author(s):  
M. Hammami ◽  
A. Soussou ◽  
F. Idoudi ◽  
T. Cohen-Bouhacina ◽  
B. Bouhaouala-Zahar ◽  
...  
Keyword(s):  
Layered Double Hydroxides ◽  
Cancer Biomarker ◽  
Biomarker Detection ◽  
Double Hydroxides

Carboxylate-intercalated layered double hydroxides for H2 sorption

2014 ◽  
Vol 2 (33) ◽  
pp. 13452-13463 ◽  
Author(s):  
Yu-Wei Huang ◽  
Soofin Cheng
Keyword(s):  
Layered Double Hydroxides ◽  
Hydrogen Adsorption ◽  
High Surface ◽  
Surface Areas ◽  
Double Hydroxides ◽  
First Time

Li–Al layered double hydroxides of high surface areas were prepared by intercalating a mixture of arylate and acetate ions, and their hydrogen adsorption capabilities were explored for the first time.

Enhancing the colorimetric detection of H2O2 and ascorbic acid on polypyrrole coated fluconazole-functionalized POMOFs

The Analyst ◽  
2019 ◽  
Vol 144 (10) ◽  
pp. 3347-3356 ◽  
Author(s):  
Xiao Li ◽  
Longjiang Sun ◽  
Xiya Yang ◽  
Kunfeng Zhou ◽  
Gongguo Zhang ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Metal Organic Framework ◽  
Colorimetric Detection ◽  
Metal Organic ◽  
First Time ◽  
Colorimetric Biosensing ◽  
Organic Framework

For the first time, a bifunctional colorimetric biosensing platform has been developed, based on a polypyrrole coated fluconazole-functionalized polyoxometalate-based metal–organic framework with ultrahigh stability for the enhanced detection of H2O2 and ascorbic acid.

scholarly journals Application of dissolvable Mg/Al layered double hydroxides as an adsorbent for the dispersive solid phase extraction of gold nanoparticles prior to their determination by atomic absorption spectrometry

2020 ◽  
Vol 12 (3) ◽  
pp. 368-375
Author(s):  
Tatiana G. Choleva ◽  
Dimosthenis L. Giokas
Keyword(s):  
Gold Nanoparticles ◽  
Solid Phase Extraction ◽  
Layered Double Hydroxides ◽  
Metallic Nanoparticles ◽  
Solid Phase ◽  
Absorption Spectrometry ◽  
Phase Extraction ◽  
Dispersive Solid Phase Extraction ◽  
Double Hydroxides ◽  
First Time

In this work, dissolvable layered double hydroxides (LDHs) were used for the first time for the extraction and preconcentration of metallic nanoparticles from water samples.

scholarly journals On the Reconstruction Peculiarities of Sol–Gel Derived Mg2−xMx/Al1 (M = Ca, Sr, Ba) Layered Double Hydroxides

Crystals ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 470 ◽  
Author(s):  
Ligita Valeikiene ◽  
Marina Roshchina ◽  
Inga Grigoraviciute-Puroniene ◽  
Vladimir Prozorovich ◽  
Aleksej Zarkov ◽  
...  
Keyword(s):  
Layered Double Hydroxides ◽  
Pore Diameter ◽  
Sol Gel ◽  
Earth Metal ◽  
Nitrogen Adsorption ◽  
Xrd Analysis ◽  
X Ray ◽  
Double Hydroxides ◽  
Synthesized Materials ◽  
First Time

In this study, the reconstruction peculiarities of sol–gel derived Mg2−xMx/Al1 (M = Ca, Sr, Ba) layered double hydroxides were investigated. The mixed metal oxides (MMO) were synthesized by two different routes. Firstly, the MMO were obtained directly by heating Mg(M)–Al–O precursor gels at 650 °C, 800 °C, and 950 °C. These MMO were reconstructed to the Mg2−xMx/Al1 (M = Ca, Sr, Ba) layered double hydroxides (LDHs) in water at 50 °C for 6 h (pH 10). Secondly, in this study, the MMO were also obtained by heating reconstructed LDHs at the same temperatures. The synthesized materials were characterized using X-ray powder diffraction (XRD) analysis and scanning electron microscopy (SEM). Nitrogen adsorption by the Brunauer, Emmett, and Teller (BET) and Barrett, Joyner, and Halenda (BJH) methods were used to determine the surface area and pore diameter of differently synthesized alkaline earth metal substituted MMO compounds. It was demonstrated for the first time that the microstructure of reconstructed MMO from sol–gel derived LDHs showed a “memory effect”.

Fluorescence and phase transitions of Mg-Al-Eu ternary layered double hydroxides – dependence on annealing

Clay Minerals ◽  
2011 ◽  
Vol 46 (3) ◽  
pp. 487-493 ◽  
Author(s):  
Yufeng Chen ◽  
Songhua Zhou ◽  
Fei Li ◽  
Junchao Wei ◽  
Yanfeng Dai ◽  
...  
Keyword(s):  
Phase Transition ◽  
Phase Transitions ◽  
Thermal Treatment ◽  
Layered Double Hydroxides ◽  
Potential Candidate ◽  
New Host ◽  
Host Materials ◽  
Double Hydroxide ◽  
Double Hydroxides ◽  
First Time

AbstractFluorescence and phase transitions of a new Mg-Al-Eu ternary layered double hydroxide (LDH) and their dependence on thermal treatment were studied for the first time. Phase transitions occurred as the temperature increased from 400 to 1100°C. The process of phase transition is discussed in detail. The emissions of Eu3+ ions described by the 5D0–7FJ transition (J = 1,2,3,4), and especially for the 5D0–7FJ transition (J = 1,2) varied markedly with phase transformations from LDH, MgO, to mixtures of MgO and MgAl2O4. Moreover,strong emissions of Eu3+ ions are present in these new host materials. These results indicate that Mg-Al-Eu ternary LDH may be a potential candidate for materials applied in fluorescent devices.

scholarly journals Anticorrosion Performance of LDH Coating Prepared by CO2 Pressurization Method

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Xiaochen Zhang ◽  
Peng Jiang ◽  
Chunyan Zhang ◽  
Bateer Buhe ◽  
Bin Liu ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Magnesium Alloy ◽  
Magnesium Alloys ◽  
Layered Double Hydroxides ◽  
Atmospheric Pressure ◽  
Az91d Alloy ◽  
Cross Sectional ◽  
Anticorrosion Performance ◽  
Double Hydroxides ◽  
First Time

Many surface treatment methods are used to improve the corrosion resistance of magnesium alloys. LDH (layered double hydroxides) conversion coatings are currently found in the most environmentally friendly and pollution-free coatings of magnesium alloy. In this study, the CO2 pressurization method was applied to the preparation of LDH coating on magnesium alloy for the first time. The effect of CO2 pressurization on the formation and corrosion resistance of LDH coating on AZ91D alloy was investigated. The hardness and adhesion were significantly higher on LDH coating in the case of CO2 pressurization than it is in atmospheric pressure. The surface and cross-sectional morphologies show that LDH coating is more compact in the case of CO2 pressurization than with atmospheric pressure. The results of the polarization curve, hydrogen evolution, and immersion tests indicate that the corrosion resistance of the LDH coating prepared by the CO2 pressurization method was significantly improved.

Surface modification of hydroxyapatite crystals by Mg–Al–CO3-layered double hydroxides in HA/Mg–Al–CO3–LDH nanocomposite

2015 ◽  
Vol 39 (7) ◽  
pp. 5189-5196 ◽  
Author(s):  
Zolfaghar Rezvani ◽  
Masoumeh Akbari
Keyword(s):  
Mechanical Properties ◽  
Surface Modification ◽  
Layered Double Hydroxide ◽  
Layered Double Hydroxides ◽  
Double Hydroxide ◽  
Double Hydroxides ◽  
First Time ◽  
Hydroxyapatite Crystals

Bioactivity and improved mechanical properties of hydroxyapatite/Mg–Al-layered double hydroxide nanocomposite are reported for the first time.

Tris(hydroxymethyl)aminomethane modified layered double hydroxides greatly facilitate polyoxometalate intercalation

2014 ◽  
Vol 43 (39) ◽  
pp. 14570-14576 ◽  
Author(s):  
Yang Chen ◽  
Dongpeng Yan ◽  
Yu-Fei Song
Keyword(s):  
Layered Double Hydroxides ◽  
Mild Conditions ◽  
Double Hydroxides ◽  
First Time

The Na3[PW12O40] intercalated tris(hydroxymethyl)aminomethane (Tris)-modified LDH is prepared for the first time without the necessity of degassing CO2, resulting in the formation of a new intercalated assembly of Tris-LDH-PW12 under mild conditions.

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