Stable Core-Shell Microcapsules for Industrial Applications

2015 ◽  
pp. 1447-1462 ◽  
Keyword(s):  
Industrial Applications ◽  
Core Shell ◽  
Stable Core

scholarly journals Morphological and Elemental Investigations on Co–Fe–B–O Thin Films Deposited by Pulsed Laser Deposition for Alkaline Water Oxidation: Charge Exchange Efficiency as the Prevailing Factor in Comparison with the Adsorption Process

2021 ◽  
Author(s):  
Y. Popat ◽  
M. Orlandi ◽  
S. Gupta ◽  
N. Bazzanella ◽  
S. Pillai ◽  
...  
Keyword(s):  
Pulsed Laser Deposition ◽  
Water Oxidation ◽  
Active Sites ◽  
High Surface ◽  
Pulsed Laser ◽  
Industrial Applications ◽  
Active Species ◽  
Laser Deposition ◽  
Core Shell ◽  
Adsorption Sites

Abstract Mixed transition-metals oxide electrocatalysts have shown huge potential for electrochemical water oxidation due to their earth abundance, low cost and excellent electrocatalytic activity. Here we present Co–Fe–B–O coatings as oxygen evolution catalyst synthesized by Pulsed Laser Deposition (PLD) which provided flexibility to investigate the effect of morphology and structural transformation on the catalytic activity. As an unusual behaviour, nanomorphology of 3D-urchin-like particles assembled with crystallized CoFe2O4 nanowires, acquiring high surface area, displayed inferior performance as compared to core–shell particles with partially crystalline shell containing boron. The best electrochemical activity towards water oxidation in alkaline medium with an overpotential of 315 mV at 10 mA/cm2 along with a Tafel slope of 31.5 mV/dec was recorded with core–shell particle morphology. Systematic comparison with control samples highlighted the role of all the elements, with Co being the active element, boron prevents the complete oxidation of Co to form Co3+ active species (CoOOH), while Fe assists in reducing Co3+ to Co2+ so that these species are regenerated in the successive cycles. Thorough observation of results also indicates that the activity of the active sites play a dominating role in determining the performance of the electrocatalyst over the number of adsorption sites. The synthesized Co–Fe–B–O coatings displayed good stability and recyclability thereby showcasing potential for industrial applications. Graphic Abstract

Simple Strategy Generating Hydrothermally Stable Core–Shell Platinum Catalysts with Tunable Distribution of Acid Sites

ACS Catalysis ◽  
2018 ◽  
Vol 8 (4) ◽  
pp. 2796-2804 ◽  
Author(s):  
Houlin Wang ◽  
Minghan Liu ◽  
Yue Ma ◽  
Ke Gong ◽  
Wei Liu ◽  
...  
Keyword(s):  
Platinum Catalysts ◽  
Acid Sites ◽  
Core Shell ◽  
Simple Strategy ◽  
Stable Core

scholarly journals Gradient‐Concentration Design of Stable Core–Shell Nanostructure for Acidic Oxygen Reduction Electrocatalysis

2020 ◽  
Vol 32 (32) ◽  
pp. 2003493 ◽  
Author(s):  
Xiao Lyu ◽  
Yi Jia ◽  
Xin Mao ◽  
Daohao Li ◽  
Gen Li ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Core Shell ◽  
Stable Core

Highly Active and Thermally Stable Core-Shell Catalysts for Solid Oxide Fuel Cells

2011 ◽  
Vol 158 (6) ◽  
pp. B596 ◽  
Author(s):  
Ju-Sik Kim ◽  
Noah L. Wieder ◽  
Ashley J. Abraham ◽  
Matteo Cargnello ◽  
Paolo Fornasiero ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Solid Oxide Fuel Cells ◽  
Solid Oxide ◽  
Core Shell ◽  
Oxide Fuel ◽  
Thermally Stable ◽  
Highly Active ◽  
Stable Core

scholarly journals Corrosion – inhibiting properties of molybdenum-containing pigments in coatings

2015 ◽  
Vol 63 (1) ◽  
pp. 14-28 ◽  
Author(s):  
Tereza Hájková ◽  
Andrea Kalendova
Keyword(s):  
Corrosion Protection ◽  
Particle Shape ◽  
High Efficiency ◽  
Industrial Applications ◽  
Core Shell ◽  
Pigment Volume Concentration ◽  
Content Type ◽  
The Core ◽  
Isometric Particle ◽  
Protection Of Metals

Purpose – This paper aims to synthesise anticorrosion pigments containing molybdenum for paints intended for corrosion protection of metals. Design/methodology/approach – The anticorrosion pigments were prepared by high-temperature solid-state synthesis from the appropriate oxides, carbonates and calcium metasilicate. Stoichiometric molybdates and core-shell molybdates with a non-isometric particle shape containing Ca, Sr, Zn, Mg and Fe were synthesised. The pigments were examined by X-ray diffraction analysis and scanning electron microscopy. Paints based on an epoxy resin and containing the substances at a pigment volume concentration of 10 volume per cent were prepared. The paints were subjected to physico-mechanical tests and to tests in corrosion atmospheres. The corrosion test results were compared to those of the paint with a commercial pigment, which is used in many industrial applications. Findings – The molybdate structure of each pigment prepared was elucidated. The core-shell molybdates exhibit a non-isometric particle shape. The pigments prepared were found to impart a very good anticorrosion efficiency to the paints. A high anticorrosion efficiency was found with the pigments Fe2(MoO4)3 and Fe2(MoO4)3/CaSiO3 and with Mg and Zn molybdates. Practical implications – The pigments can be used for the formulation of paints intended for the corrosion protection of metals. The pigments also improve the paints’ physical properties. Originality/value – The use of the pigments in anticorrosion paints for the protection of metals is new. The benefits include the use and the procedure of synthesis of the anticorrosion pigments which are free from heavy metals and are acceptable from the aspect of environmental protection. Moreover, the core-shell molybdates, whose high efficiency is comparable to that of the stoichiometric molybdates, have lower molybdenum contents.

Preparation of high stable core/shell magnetic nanoparticles and application in Bacillus thuringiensis Cry1Ac proteins detection

2017 ◽  
Vol 241 ◽  
pp. 758-764 ◽  
Author(s):  
Jiyuan Liang ◽  
Yuxiang Wu ◽  
Cui Liu ◽  
Yuan-Cheng Cao ◽  
Jun’An Liu ◽  
...  
Keyword(s):  
Magnetic Nanoparticles ◽  
Bacillus Thuringiensis ◽  
Core Shell ◽  
Stable Core
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