α-Crystobalite Preparation via Supercritical Carbon Dioxide Drying of Opal Matrices Synthesized by Sol-Gel Method

被引：2

作者：

Dyshin, A. A. ^{[1
]}

Bondarenko, G. V. ^{[2
]}

Kiselev, M. G. ^{[1
]}

机构：

[1] Russian Acad Sci, GA Krestov Inst Solut Chem, Ivanovo 153045, Russia

[2] Russian Acad Sci, Inst Expt Mineral, Chernogolovka 142432, Moscow Oblast, Russia

来源：

RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY B | 2019年 / 13卷 / 07期

基金：

俄罗斯基础研究基金会;

关键词：

sol-gel method; supercritical carbon dioxide; synthetic opals; alpha-cristobalite; supercritical drying; scanning electron microscopy; X-ray diffraction; Raman spectroscopy; SILICA PARTICLES; SIZE; NANOTUBES; DISPERSION; VISCOSITY; MIXTURES;

D O I：

10.1134/S1990793119070030

中图分类号：

O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];

学科分类号：

070203 ; 070304 ; 081704 ; 1406 ;

摘要：

This article describes the method for preparation of opal matrices by the sol-gel method, their drying in supercritical carbon dioxide, and the preparation of alpha-cristobalite with high temperature annealing. The conditions for the preparation of synthetic opal matrices and the concentration of reagents for this process are described. A supercritical operation mode of the drying of silica xerogel to produce porous matrices is proposed. The transition of SiO2 from an amorphous to a crystalline state by supercritical drying and annealing is shown. All processes were controlled by scanning electron microscopy, Raman spectroscopy, and X-ray diffraction.

引用

页码：1182 / 1188

页数：7

共 27 条

[1]

Alekseenko A. A., 2004, PERSPEKT MAT, V1, P27

[2] FORMATION OF COLLOIDAL SILICA PARTICLES FROM ALKOXIDES [J].

BAILEY, JK ;

MECARTNEY, ML .

COLLOIDS AND SURFACES, 1992, 63 (1-2) :151-161

[3] Porous structure of synthetic opals [J].

Bardyshev, II ;

Mokrushin, AD ;

Pribylov, AA ;

Samarov, EN ;

Masalov, VM ;

Karpov, IA ;

Emel'chenko, GA .

COLLOID JOURNAL, 2006, 68 (01) :20-25

[4] PREPARATION OF MONODISPERSE SILICA PARTICLES - CONTROL OF SIZE AND MASS FRACTION [J].

BOGUSH, GH ;

TRACY, MA ;

ZUKOSKI, CF .

JOURNAL OF NON-CRYSTALLINE SOLIDS, 1988, 104 (01) :95-106

[5] Effect of Temperature on Annealing Products of Synthesized Opal Matrices [J].

Dyshin A.A. ;

Eliseeva O.V. ;

Bondarenko G.V. ;

Kiselev M.G. .

Inorganic Materials: Applied Research, 2019, 10 (2) :425-430

[6] Dispersion of single-walled carbon nanotubes in dimethylacetamide and a dimethylacetamide-cholic acid mixture [J].

Dyshin, A. A. ;

Eliseeva, O. V. ;

Bondarenko, G. V. ;

Kolker, A. M. ;

Kiselev, M. G. .

RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A, 2016, 90 (12) :2434-2439

[7] Dissolution of Single-Walled Carbon Nanotubes in Alkanol-Cholic Acid Mixtures [J].

Dyshin, A. A. ;

Eliseeva, O. V. ;

Bondarenko, G. V. ;

Kiselev, M. G. .

RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A, 2015, 89 (09) :1628-1632

[8] Dispersion of single-walled carbon nanotubes in alcohol-cholic acid mixtures [J].

Dyshin, A. A. ;

Eliseeva, O. V. ;

Bondarenko, G. V. ;

Kolker, A. M. ;

Zakharov, A. G. ;

Fedorov, M. V. ;

Kiselev, M. G. .

RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A, 2013, 87 (12) :2068-2073

[9] Dependence of bulk and viscosity characteristics of naphthalene solutions in methanol-heptane mixtures at 298.15 K [J].

Dyshin, A. A. ;

Eliseeva, O. V. ;

Kiselev, M. G. .

RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A, 2013, 87 (02) :336-339

[10] Density and Viscosity of Methanol-Heptane (Octane) Mixtures at Low Alkane Concentrations over the Temperature Range 288.15-328.15 K [J].

Dyshin, A. A. ;

Eliseeva, O. V. ;

Kiselev, M. G. .

RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A, 2012, 86 (04) :563-567

← 1 2 3 →