نتایج جستجو برای: mesoporous material

تعداد نتایج: 373516  

Journal: :iranian journal of oil & gas science and technology 2013
hamed rashidi touba hamoule mohammad reza khosravi nikou ahmad shariati

msu-s mesoporous catalyst with [sio2]/[al2o3] ratio of 55 was synthesized using tetrapropylammonium hydroxide (tpaoh) as a structure directing agent and hexadecyltrimethylammonium bromide (ctab) as a surfactant. the catalytic activity of the calcined sample was evaluated for the dehydration of methanol to dimethyl ether (dme) in a vertical fixed bed microreactor at a weight hurly space velocity...

2015
Maria Ignat Maria Emiliana Fortuna Liviu Sacarescu Mirela-Fernanda Zaltariov Valeria Harabagiu

The present research reports the synthesis of poly-N-isopropylacrylamide / mesoporous carbon composites, prepared by radical polymerization of N-isopropylacrylamide inside mesoporous carbon pores functionalized with carboxylic groups. The deposition of poly-N-isopropylacrylamide on mesoporous carbon was confirmed by FT-IR spectroscopy, TEM, N2-sorption measurements. The mesoporous carbon materi...

2009
Venkatathri Narayanan

A new procedure is reported to synthesis mesoporous silica micro sphere for the first time. In these method two surfactants namely Span 80 and Tween 80 were used. Small angle X ray diffraction and N2 adsorption analysis shows the synthesized material has mesoporous property. The material has spherical morphology with 1-10 μm particle size. Beside the material found to have microcapsule property...

2012
Farouq Twaiq

Adsorption of methanol and ethanol over mesoporous siliceous material are studied in the current paper. The pure mesoporous silica is prepared using tetraethylorthosilicate (TEOS) as silica source and dodecylamine as template at low pH. The prepared material was characterized using nitrogen adsorption,nX-ray diffraction (XRD) and scanning electron microscopy (SEM). The adsorption kinetics of me...

Journal: :Acta biomaterialia 2011
Chengtie Wu Wei Fan Michael Gelinsky Yin Xiao Paul Simon Renate Schulze Thomas Doert Yongxiang Luo Gianaurelio Cuniberti

For a biomaterial to be considered suitable for bone repair it should ideally be both bioactive and have a capacity for controllable drug delivery; as such, mesoporous SiO(2) glass has been proposed as a new class of bone regeneration material by virtue of its high drug-loading ability and generally good biocompatibility. It does, however, have less than optimum bioactivity and controllable dru...

Journal: :iranian journal of chemistry and chemical engineering 0

a novel sulfur nanocomposite was fabricated based on graphitic mesoporous carbon.the graphitic mesoporous carbon was synthesized using sucrose as carbon precursor, nano caco3 as hard template and nickel nitrate as graphitization catalyst. the structural properties of the prepared material were characterized using powder x-ray diffraction (xrd), n2-adsorption/desorption and scanning electron mic...

2014
Dolores Esquivel Pascal Van Der Voort Francisco J. Romero-Salguero

Periodic mesoporous organosilicas (PMOs), reported for the first time in 1999, constitute a new branch of organic-inorganic hybrid materials with high-ordered structures, uniform pore size and homogenous distribution of organic bridges into a silica framework. Unlike conventional mesoporous silicas, these materials offer the possibility to adjust the surface (hydrophilicity/hydrophobicity) and ...

Journal: :journal of ultrafine grained and nanostructured materials 0
mansoor anbia research laboratory of nanoporous materials, faculty of chemistry, iran university of science and technology, farjam street, narmak, p.o. box 16846-13114, tehran, iran. mohammad javad habibi research laboratory of nanoporous materials, faculty of chemistry, iran university of science and technology, farjam street, narmak, p.o. box 16846-13114, tehran, iran. mojgan haghsenas research laboratory of nanoporous materials, faculty of chemistry, iran university of science and technology, farjam street, narmak, p.o. box 16846-13114, tehran, iran. majideh babaei department of chemistry, kerman branch, islamic azad university, kerman, iran.

in this study, a novel solid dendrimer amine (hyperbranched polymers) was prepared using mesoporous carbon nitride functionalized by melamine based dendrimer amines. this adsorbent was denoted mda-mcn-1. the process was stepwise synthesis and hard-templating method using mesoporous silica sba-15 as a template. cyanuric chloride and n,n-diisopropylethylamine (dipea, merck) were used for function...

Journal: :iranian journal of chemistry and chemical engineering (ijcce) 2015
hamid reza pouretedal sara basati

grinding (solvent-free) method was used as a superior technique to prepare mesoporous photocatalysts of zno, zns, zno / zns, cdo, cds and cdo / cds-sba-15. in this technique, the nitrate, acetate and chloride salts of zinc and/or cadmium were grinded with as-synthesized sba-15 as a mesoporous material. the controllable sulfurationis was used to prepare zns, zno/zns, cds and cdo/cds-sba-15 at te...

Journal: :The International Conference on Applied Mechanics and Mechanical Engineering 2018

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