Adsorptive Modification of High-Dispersed Magnesium Hydrosilicate

Lutsyuk, Iryna; Vakhula, Yaroslav; Levytskyi, Volodymyr; Zhuk, L. P.

doi:10.23939/chcht08.03.261

Cited by 2 publications

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References 1 publication

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“…Ceramic oxide powders are necessary components of many materials, in particular, solid-state lasers, photocatalysts, plastics and heat-resistant concrete, dental composite materials, sorbents, etc. [1][2][3][4]. The main characteristics of ceramic powders are the chemical composition, their homogeneity, shape, particles size and granulometry, the degree of particles crystallinity and the concentration of nonequilibrium defects [5][6].…”

Section: Introductionmentioning

confidence: 99%

Theoretical Aspects of Modification Mechanism for Sol-Gel Ceramic Oxide Powders of Technical Application

Lutsyuk¹,

Vakhula²

2018

ChChT

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1 Liquid phase technologies for high-grade ceramic oxide powders of technical purpose and methods of their modification have been developed. On the basis of physico-chemical research methods various mechanisms of modifying processes have been analyzed. Substitution of the main ions by doping ones occurs in complex oxide powders followed by the formation of solid solutions. A powder which was obtained via TiO 2 modification by sulfur has a surface layer in which sulfur forms chemical bonds.

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Section: Introductionmentioning

confidence: 99%

Theoretical Aspects of Modification Mechanism for Sol-Gel Ceramic Oxide Powders of Technical Application

Lutsyuk¹,

Vakhula²

2018

ChChT

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Wideband luminescence from bandgap-matched Mg-based Si core-shell geometry nanocomposite

et al. 2018

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We use wet treatment to integrate red-luminescent Si nanoparticles with Mg-based wide-bandgap insulators Mg(OH) and MgO (5.7 and 7.3 eV respectively). In the process, Mg2+ is reduced on Si nanoparticle clusters, while suffering combustion in water, producing a spatially inhomogeneous Mg(OH)2/MgO-Si nanoparticle composite with an inner material predominantly made of Si, and a coating consisting predominantly of magnesium and oxygen (“core-shell” geometry). The nanocomposite exhibit luminescence covering nearly entire visible range. Results are consistent with formation of Mg(OH)2/MgO phase with direct 3.43-eV bandgap matching that of Si, with in-gap blue-green emitting states of charged Mg and O vacancies. Bandgap match with nanocomposite architecture affords strong enough coupling for the materials to nearly act as a single hybrid material with novel luminescence for photonic and photovoltaic applications.

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Adsorptive Modification of High-Dispersed Magnesium Hydrosilicate

Cited by 2 publications

References 1 publication

Theoretical Aspects of Modification Mechanism for Sol-Gel Ceramic Oxide Powders of Technical Application

Theoretical Aspects of Modification Mechanism for Sol-Gel Ceramic Oxide Powders of Technical Application

Wideband luminescence from bandgap-matched Mg-based Si core-shell geometry nanocomposite

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