توجه: محتویات این صفحه به صورت خودکار پردازش شده و مقاله‌های نویسندگانی با تشابه اسمی، همگی در بخش یکسان نمایش داده می‌شوند.
۱Evaluation of Effect of γ–Irradiation on Normal and Surface Functionalized SBA–15 Mesopore with Aurintricarboxylic acid by Fourier–Transfer Infrared (FT–IR) Spectroscopy
نویسنده(ها): ، ، ،
اطلاعات انتشار: همایش بین المللی ژئولیت ایران، سال
تعداد صفحات: ۴
This paper reports the results the obtained after γ–irradiation on normal and functionalized SBA–15
mesopore with aurintricarboxylic acid (triamunium salt) ligand and then, the characterization of normal and
functionalized SBA–15 mesopore particles was carried out either with and without irradiation by fouriertransfer
infrared (FT–IR) analysis technique.<\div>

۲Control & Determination of Nanoporous silica surface hydrophobicity by dye adsorption model
نویسنده(ها): ،
اطلاعات انتشار: سومین کنفرانس نانوساختارها، سال
تعداد صفحات: ۴
Surface hydrophobicity control using various silylation reagents was studied by UV–Vis spectrometry. Nanoporous LUS–1 sample was characterized using XRD, SEM, BET surface measurement, pore size distribution and FT–IR. The silylated samples were treated with malachite green in alkaline condition. Adsorption of malachite green oxalate, a cationic dye, from aqueous solution offers a spectroscopic approach to measure surface hydrophobicity. The UV–Vis results showed a logic trend with respect to the surface free silanolates. For an initial concentration 200 mg\l adsorbent, as–synthesized silica a still containing the templating surfactant exhibited the lowest percentage of dye adsorption (82%) and for acid washed sample, this value was the highest (96%). Between these two limits, full silylated sample adsorbed relatively small amount of dye molecules (85.6%) due to the nearly complete coverage of hydrophobic trimethylsilane and hexamethyldisiloxane groups on its surface. Semi–silylated sample with hexamethyldisiloxane and partially silylated one with hexamethyldisilazane had 91.5% and 95.5% adsorpsion amount, respectively. By this adsorption model we are able to control the surface hydrophobicity through easy silylation method.<\div>

۳The Effect of Pentaerythritol in Synthesis of the Nanoporous Silica
نویسنده(ها): ، ،
اطلاعات انتشار: سومین کنفرانس نانوساختارها، سال
تعداد صفحات: ۴
Nanoporous silica with pore size in the rang of 2.5–3.5 nm was synthesized and characterized using BET surface measurement, SEM and XRD analysis. Pentaerythritol has been used as additive to change the morphology of MCM. The structural factors we focused on them, were MCM pore size, solidity and ordering. There was an optimum amount of alcohol in equal moles of Pentaerythritol and surfactant, toward observation the most sensible structural altering. At the other amounts, the aging times of samples could be changed to earn superlative qualifications. When the aging times were changed, an optimum aging time at 2 day was observed as well.<\div>
نمایش نتایج ۱ تا ۳ از میان ۳ نتیجه