Spectral properties of the high-silica porous glasses doped by silver halides

Антропова, Т. В.; Гирсова, М. А.; Анфимова, И. Н.; Дроздова, И. А.

doi:10.1016/j.jlumin.2017.09.005

Cited by 21 publications

(12 citation statements)

References 34 publications

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“…Porous silicate matrices of two types (MIP—microporous and MAP—macroporous ones) in the form of flat-parallel polished plates with a size of 10 × 10 × 1 mm 3 were obtained as a result of chemical etching of phase-separated sodium borosilicate (SBS) glass of composition (wt.%): 6.74 Na 2 O, 20.52 B 2 O 3 ,·72.59 SiO 2 , and 0.15 Al 2 O 3 [ 26 ] in 3 M HCl solution (glass MIP) and additionally in 0.5 M KOH solution (glass MAP). To form a two-frame structure, SBS glass was previously subjected to isothermal exposure at 550 °C for 144 h. Obtained PGs-porous glasses were washed in distilled water and dried at 120 °C in an air atmosphere.…”

Section: Methodsmentioning

confidence: 99%

New Insight into Phase Transitions of Porous Glass-Based Ferroelectric Nanocomposites

Rysiakiewicz-Pasek¹,

Антропова²,

Polyakova³

et al. 2020

Materials

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The results of XRD, FTIR and differential scanning calorimetry (DSC) studies of empty porous silica matrices filled with binary mixtures of K1–xAgxNO3 (x = 0.05, 0.10) are reported in comparison with those obtained for bulk salts in the temperature range of structural phase transitions. Scanning electron microscopic data of the studied empty macroporous and microporous glasses confirmed differences in the pore morphology associated with the presence of silica gel. Accordingly, XRD and FTIR samples contain crystalline phase of KNO3 and AgNO3. The results of calorimetric investigation of porous glasses filled with binary mixtures of K1–xAgxNO3 (x = 0.05, 0.10) are presented. The results show that in the K1–xAgxNO3 nanocomposites, anomalies associated with phase transitions were detected. An influence of the mean value of pores sizes on the ferroelectric phase transition temperatures of K1–xAgxNO3 nanocrystals embedded into the porous matrices was determined. The impact of pore space structure on the phase transitions of ferroics nanocomposites was discussed.

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Section: Methodsmentioning

confidence: 99%

New Insight into Phase Transitions of Porous Glass-Based Ferroelectric Nanocomposites

Rysiakiewicz-Pasek¹,

Антропова²,

Polyakova³

et al. 2020

Materials

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“…Photochromic quartz-like lenses were obtained by impregnating a porous silica glass with a mixture of Ag/Cu -Hal from a water-salt solutions. It was shown that UV radiation causes in these nanoporous samples a luminiscence in a visible part of the spectrum (450 − 620 nm) [61]. The different maxima in the luminiscence spectra is due by the the presence of different size silver-containing aggregates [62].…”

Section: Porous Glassesmentioning

confidence: 95%

“…Those modified porous glasses showing photochromic properties can be employed in different applications such as recording and dose meter of UV radiation or in solar concentrators where the presence of Ag nanoparticles in transparent media is required [60,61].…”

Section: Porous Glassesmentioning

confidence: 99%

Nanoparticle formation in nanoporous structures and applications

et al. 2020

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Firmato digitalme nte da VANELLA ANDREA C=IT I wish to thank Prof. Emilio Mariotti for his help and support during my work days. I would like to thank also Prof.ssa Carmela Marinelli for her valuable advices.Special thanks go to the researchers of the PhysNano laboratory at the Saint Petersburg National Research University of Information technologies, Mechanics and Optics (ITMO) for the preparation of the alumina samples analyzed in this work.I also want to thank Leonardo Stiaccini for the constant and precious technical help and assistance.Finally, I have to thank Nicole for always being there.vii

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“…Ранее было установлено, что при λ ex = 380 nm образцы КС 8В-НТ (870 ± 10 • С, air) обладают люминесценцией в широкой спектральной области 400−550 nm со слабым пиком при 450 nm из-за дефектов сетки стекла (см. обзор в [38]).…”

Section: результаты исследованийunclassified

Влияние Химического Состава Пористой Матрицы И Атмосферы Спекания На Люминесцентные Свойства Висмутсодержащих Композиционных Материалов

Гирсова¹,

Антропова²,

Головина³

et al. 2023

Оптика И Спектроскопия

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The spectral-optical and luminescence properties of bismuth-containing composite materials based on matrices of high-silica porous glasses are investigated. Luminescence spectra, luminescence excitation spectra, infrared transmission spectra (8000–4000 cm-1) depending on the composition of different types of matrices and sintering atmosphere (nitrogen, argon) of bismuth-containing composite materials were examined. It was found that the samples of bismuth-containing composite materials are characterized by UV (λem = 350 nm), blue-green (λem = 410–550 nm) and orange-red (λem = 600–725 nm) luminescence due to the presence of various bismuth active centers. The analysis of the spectra obtained by near-infrared spectroscopy demonstrates the formation of Bi2+ dimers of bismuth and bismuth active centers associated with silicon.

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Spectral properties of the high-silica porous glasses doped by silver halides

Cited by 21 publications

References 34 publications

New Insight into Phase Transitions of Porous Glass-Based Ferroelectric Nanocomposites

New Insight into Phase Transitions of Porous Glass-Based Ferroelectric Nanocomposites

Nanoparticle formation in nanoporous structures and applications

Влияние Химического Состава Пористой Матрицы И Атмосферы Спекания На Люминесцентные Свойства Висмутсодержащих Композиционных Материалов

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