Topic
Silica gel
About: Silica gel is a research topic. Over the lifetime, 22313 publications have been published within this topic receiving 325516 citations. The topic is also known as: Amorphous silica & Precipitated amorphous silica.
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TL;DR: The study revealed that using activated carbons for the purification of biodiesel resulted in higher yield and better fuel properties compared to those purified using silica gel and water washing method.
71 citations
TL;DR: A column packing for high-performance liquid chromatography, porous microspheres of silica produced by the agglutination of colloidal silica particles, has recently been introduced for use in adsorption chromatography.
71 citations
TL;DR: Prasad et al. as discussed by the authors presented a review of the development carried out so far in synthesis, properties, characterization and method of determination of silica, silica gel and silica xero-gel.
Abstract: In recent years, silica gels have developed a lot of interest due to their extraordinary properties and their existing and potential applications in science and technology. Silica gel has a wide range of applications such as a desiccant, as a preservation tool to control humidity, as an adsorbent, as a catalyst and as a cata-lyst support. Silica gel is a rigid three-dimensional network of colloidal silica, and is classified as: aqua-gel, alco-gel, xero-gel and aero-gel. Out of all known solid porous materials, aero-gels are particularly known for their high specific surface area, high porosity, low bulk density, high thermal insulation value, ultra low dielectric constant and low index of refraction. Because of these extraordinary properties silica aero-gel has many commercial applications such as thermal window insulation, acoustic barriers, super-capacitors and catalytic supports. However, monolithic silica aero-gel has been used extensively in high energy physics in Cherenkov radiation detectors and in shock wave studies at high pressures, inertial confinement fusion (ICF) radio-luminescent and micrometeorites. Silica gel can be prepared by using various sol gel precursors but the rice husk (RH) is considered as the cheapest source for silica gel production. Rice husk is a waste product abundantly available in rice producing countries during milling of rice. This review article aims at summarizing the developments carried out so far in synthesis, properties, characterization and method of determination of silica, silica gel, silica aero-gel and silica xero-gel. The effect of synthesis parameters such as pH, temperature of burning the rice husk, acid leaching prior to formation of rice husk ash (RHA) on the properties of final product are also described. The attention is also paid on the application of RH, RHA, sil-ica, silica aero-gel and silica xero-gel. Development of economically viable processes for getting rice husk silica with specific properties assumes importance at this juncture. Copyright © 2012 by BCREC UNDIP. All rights reserved. Received: 23th November 2011, Revised: 09th January 2012, Accepted: 10th January 2012 [How to Cite : R. Prasad, and M. Pandey. (2012). Rice Husk Ash as a Renewable Source for the Production of Value Added Silica Gel and its Application: An Overview. Bulletin of Chemical Reaction Engineering & Catalysis , 7 (1): 1-25. doi:10.9767/bcrec.7.1.1216.1-25 ] [How to Link / DOI : http://dx.doi.org/10.9767/bcrec.7.1.1216.1-25 ]
71 citations
TL;DR: In this article, functional monomer acrylamide (AM) was grafted step by step onto the surface of silica gel particles using 3-methacryloxypropyl trimethoxysilane (MPS) as coupling agent and the grafted particle PAM/SiO 2 was prepared.
71 citations
TL;DR: A novel chiral stationary phase (PPHCDN7) was prepared by immobilization of heptakis(6-azido-6-deoxy-2,3-di-O-phenylcarbamoylated)-beta-cyclodextrin onto the surface of amino-functionalized silica gel via multiple urea linkages derived from an extended application of the Staudinger reaction.
70 citations