Preparation of monolithic silica gel and glass by the sol-gel method using N,N-dimethylformamide

1987 ◽  
Vol 22 (12) ◽  
pp. 4407-4410 ◽  
Author(s):  
Tatsuhiko Adachi ◽  
Sumio Sakka
Keyword(s):  
Silica Gel ◽  
Sol Gel ◽  
Monolithic Silica ◽  
Gel Method ◽  
Sol Gel Method

Highly transparent, bright green, sol–gel-derived monolithic silica-(Tb,Ce)PO4 glass-ceramic phosphors

RSC Advances ◽  
2014 ◽  
Vol 4 (51) ◽  
pp. 26692-26696 ◽  
Author(s):  
Koichi Kajihara ◽  
Shiori Yamaguchi ◽  
Ken Kaneko ◽  
Kiyoshi Kanamura
Keyword(s):  
Glass Ceramic ◽  
Rayleigh Scattering ◽  
Sol Gel ◽  
Monolithic Silica ◽  
Gel Method ◽  
Sol Gel Method ◽  
Silica Glasses ◽  
Bright Green ◽  
Green Photoluminescence

A cosolvent-free sol–gel method yields monolithic silica glasses containing (Tb,Ce)PO4 nanocrystals, free from Rayleigh scattering, and exhibiting ultraviolet-induced bright green photoluminescence.

scholarly journals LASER-photolysis of hemoglobin encapsulated in the silica-gel using Sol-Gel method.

1999 ◽  
Vol 39 (supplement) ◽  
pp. S125
Author(s):  
T. Nakai ◽  
H. Morimoto ◽  
H. Hori
Keyword(s):  
Silica Gel ◽  
Sol Gel ◽  
Laser Photolysis ◽  
Gel Method ◽  
Sol Gel Method

Spectroscopic characterization of zirconium(IV) and hafniumf(IV) gallate phthalocyanines in monolithic silica gels obtained by sol–gel method

2005 ◽  
Vol 27 (9) ◽  
pp. 1484-1494 ◽  
Author(s):  
Y.S. Gerasymchuk ◽  
V.Ya. Chernii ◽  
L.A. Tomachynski ◽  
J. Legendziewicz ◽  
St. Radzki
Keyword(s):  
Sol Gel ◽  
Spectroscopic Characterization ◽  
Silica Gels ◽  
Monolithic Silica ◽  
Gel Method ◽  
Sol Gel Method

Synthesis of Silica Gel and Development of Coating Method for Applications in a Regenerative Air Dehumidifier

2016 ◽  
Vol 839 ◽  
pp. 70-74
Author(s):  
Winit Aimjaijit ◽  
Pipat Chaiwiwatworakul ◽  
Surawut Chuangchote
Keyword(s):  
Sulfuric Acid ◽  
Heat Exchanger ◽  
Surface Area ◽  
Silica Gel ◽  
Sol Gel ◽  
Dip Coating ◽  
Moisture Adsorption ◽  
Air Conditioners ◽  
Gel Method ◽  
Sol Gel Method

In order to control humidity in air conditioning system, various desiccants are used to dehumidify air in air conditioners. One of simple methods, which can be used to coat desiccant materials on surface of heat exchanger in air conditioners, is dip coating. Typical, desiccants used in dehumidifying system is silica gel in a form of solid-state powder. This powder has low adhesion with the heat exchanger surface. To improve adhesion of the silica gel powder, some glue is generally applied on the surface of heat exchanger. The dehumidification properties of silica gel, however, will be remarkably reduced because of less surface area of silica gel powder. Instead of silica powder, this work aims to synthesize silica gel using sol-gel method, which the sol-state material can be suitably used in dip coating. In experimental study, silica gel was synthesized by sol-gel method of precursors with 1 M sulfuric acid (H2SO4). The pH was adjusted using sodium silicate solution (Na2O(SiO2)x.xH2O) and rinsing with DI water. Surface area, pore volume and size, phase composition, morphology, and percentage of moisture adsorption of the synthesized silica gel were characterized. Silica gel fabricated with pH 5 showed the highest percentage of moisture adsorption compared with other samples. In addition to the highest percentage, silica gel with pH 5 could adsorb water up to 28 times of its own weight. X-ray diffraction (XRD) results showed that Na2SO4 impurity were successfully eliminated after rinsing with DI water more than 4 times. Finally, adhesive property of silica gel on aluminium-fin samples was tested with scalloped tape-test method. It was observed that, to improve the adhesion property of silica gel on the aluminium fins, prior to dipping of silica gel, the fins should be etched with sulfuric acid. The acid can adjust the surface of fines to be much rougher.

A facile Sol-gel method based on urea-SnCl2 deep eutectic solvents toward synthesis of SnO2/SiO2 with high oxidation desulfurization activity

2021 ◽  
Author(s):  
Xiaoyi Liu ◽  
Xiuping Li ◽  
Rongxiang Zhao ◽  
Hao Zhang
Keyword(s):  
Silica Gel ◽  
Sol Gel ◽  
Supported Catalyst ◽  
Deep Eutectic Solvents ◽  
Gel Method ◽  
Sol Gel Method ◽  
High Oxidation ◽  
Desulfurization Activity

Abstract：The silica gel containing SnCl2-base deep eutectic solvents (DESs) was synthesized by sol-gel method using SnCl2-base DESs as the loading component. The n%-SnO2/SiO2 (n=2, 4, 6) supported catalyst was obtained...

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