Results 221 to 230 of about 22,015 (273)

Recovery of nickel ions from wastewater by precipitation approach using silica xerogel.

Journal of Hazardous Materials, 2019
A facile route was developed to recover nickel ions from a synthetic wastewater. It involved the use of silica xerogel containing amine in the nickel sulphate solution resulting in the formation of a greenish precipitate.
Ruilin Wang, D. Ng, Shiquan Liu
semanticscholar   +1 more source

CdS semiconductor doped silica xerogels

Materials Science and Engineering: A, 1993
Abstract CdS doped amorphous silica was prepared by the sol-gel method. The CdS concentration in weight varied from 5% to 20%. The samples were characterized by four different and complementary techniques: X-ray diffraction (XRD), high resolution transmission electron microscopy (HRTEM), low frequency inelastic Raman scattering (LOFIRS) and small ...
A. Othmani, C. Bovier, J.C. Plenet, J. Dumas, B. Champagnon, C. Mai   +5 more
openaire   +1 more source

Elastic Properties of Silica Xerogels

Journal of the American Ceramic Society, 1990
To calculate elastic constants, longitudinal and tranverse acoustic wave velocities were measured for silica xerogels as a function of relative humidity (rh). The silica xerogels studied are microporous with open porosity of 53 vol%. The longitudinal wave velocity exhibits a minimum at about 35% rh.
Lisa C. Klein, Bennet Abramoff
openaire   +2 more sources

Synthesis of novel ZnO/carbon xerogel composites: Effect of carbon content and calcination temperature on their structural and photocatalytic properties

Ceramics International, 2019
This paper reports the development of new ZnO/carbon xerogel composites (XZn w) for photocatalytic applications. The use of black wattle tannin as a precursor to the carbon xerogel aimed at reducing costs and environmental impacts.
N. Moraes, Leticia Araujo Bacetto, G. D. Santos, M. I. P. D. Silva, J. Machado, T. Campos, G. Thim, L. A. Rodrigues   +7 more
semanticscholar   +1 more source

Tunable dye-doped xerogel lasers

Conference on Lasers and Electro-Optics Europe, 1994
The easiest route to produce tunable optical pulses is to use a broadband fluorescent gain medium. For this purpose organic dye molecules are very suitable and have been widely used in solution during the past 30 years. Today, new crystals such as titanium sapphire, and nonlinear techniques such as optical parametric oscillation, may provide solid ...
M. Canva, P. Georges, A. Dubois, A. Brun, F. Chaput, J.-P. Boilot   +5 more
openaire   +1 more source

Structural characterization of silica xerogels

Journal of Non-Crystalline Solids, 1995
The structure of silica xerogels prepared following a fully inorganic route was investigated by means of the concurrent use of gas-adsorption, solid-state nuclear magnetic resonance and neutron diffraction techniques. Such an approach enables consistent estimates for the particle and pore sizes to be derived which show the existence of microporous ...
M.J. Muñoz-Aguado, M. Gregorkiewitz, F.J. Bermejo   +2 more
openaire   +1 more source

Novel advancements in xerogel polymeric nanoarchitectures and multifunctional applications

Journal of porous materials, 2023
C. Idumah
semanticscholar   +1 more source

Pore Confinement-enhanced Electrochemiluminescence on SnO2 Nanocrystal Xerogel with NO3- as Co-reactant and Its Application in Facile and Sensitive Bioanalysis.

Analytical Chemistry, 2019
Herein, 10-fold electrochemiluminescence (ECL) enhancement from porous SnO2 nanocrystal (SnO2 NC) xerogel (vs. discrete SnO2 NCs) was firstly observed with NO3- as a novel co-reactant. This new booster phenomenon caused by pore characteristic was defined
Yan-Mei Lei, Ying Zhuo, M. Guo, Y. Chai, R. Yuan   +4 more
semanticscholar   +1 more source

Thermal stability of xerogel films

Thin Solid Films, 2001
In this work, we have investigated the thermal stability of the organic component of porous SiO2 (xerogel) films using a combination of ion beam techniques and thermal desorption spectroscopy (TDS). Ion beam techniques reveal a large concentration of carbon and hydrogen atoms in this film.
A. Kumar, H. Bakhru, J.B. Fortin, G.-R. Yang, T.-M. Lu, C. Jin, W.W. Lee   +6 more
openaire   +1 more source

A facile preparation of transparent methyltriethoxysilane based silica xerogel monoliths at ambient pressure drying

Microporous and Mesoporous Materials, 2019
The highly transparent and hydrophobic methyltriethoxysilane (MTES) based silica xerogel monoliths with excellent integrity and low thermal conductivity were facilely synthesized by a novel method without complex steps of surface modification and solvent
Ziwei Niu, Xiaoyong He, Tengxiang Huang, Bicheng Tang, Xuan Cheng, Y. Zhang, Zai-Dong Shao   +6 more
semanticscholar   +1 more source