نتایج جستجو برای: functionalized sba 15
تعداد نتایج: 518694 فیلتر نتایج به سال:
سوخت های فسیلی رایج ترین منابع انرژی در جهان محسوب می شوند. رشد صنعت و تکنولوژی، افزایش تقاضا برای مصرف انرژی، کاهش ذخایر سوخت های فسیلی و افزایش قیمت آن ها منجر به مطرح شدن مساله-ی یافتن سوخت جایگزین شد. سوخت زیستی ها از جمله گزینه های مناسبی هستند که به عنوان سوخت جایگزین پیشنهاد شدند. بیواتانول و بیودیزل رایج ترین سوخت های زیستی هستند که در این بین بیودیزل بیشتر مورد توجه قرار گرفته شده است....
The formation of radical species in solution can be triggered through thermal or photochemical activation a suitable precursor. This EPR study aimed to establish if these two modes were as effective mesoporous silicas solution. First, calibration system was devised and validated reliably quantify the formation. Alkoxyamines selected generate stable nitroxyl radicals upon heating irradiation. Th...
1,8-dioxo-decahydroacridines have been synthesized by the three-component reaction of aromatic aldehydes, aromatic amines (or ammonium acetate), and dimedone in the presence of sulfonic acid functionalized nanoporous silica (sba-pr-so3h) under solvent-free conditions. excellent yields, short reaction times, mild reaction conditions, and easy work-up procedures are advantages of this green method.
Knoevenagel condensation between barbituric acid and aldehyde was investigated in the presence of sulfonic acid functionalized nanoporous silica (SBA-Pr-SO3H) and resulted in the formation of arylidene and bis-arylidene barbiturates. Excellent yields and short reaction times are related to the high efficiency of SBA-Pr-SO3H that the reactions take place easily in its nano-pores. SBA-Pr-SO3H as ...
Highly ordered mesoporous graphitic carbon was synthesized from a simple surfactant-assisted nanocasting route, in which ordered mesoporous silica SBA-15 maintaining its triblock copolymer surfactant was used as a hard template and natural soybean oil (SBO) as a carbon precursor. The hydrophobic domain of the surfactant assisted SBO in infiltration into the template's mesoporous channels. After...
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