نتایج جستجو برای: nh2 sba 15

تعداد نتایج: 505221  

2013
Siew-Pei Lee Anita Ramli

BACKGROUND Catalytic deoxygenation is a prominent process for production of renewable fuels from vegetable oil. In this work, deoxygenation of technical grade methyl oleate to diesel fuel aliphatic hydrocarbons (C15 - C18) is evaluated with several parameters including temperature, hydrogen pressure and reaction time in a stirred batch reactor over Pd/SBA-15 catalysts. RESULTS Two different S...

Journal: :Nanoscale 2015
Tuo Wang Xiang Yuan Shuirong Li Liang Zeng Jinlong Gong

Tuning the interfacial perimeter and structure is crucial to understanding the origin of catalytic performance. This paper describes the design, characterization, and application of CeO2 modified Au@SBA-15 (Au-CeO2@SBA-15) catalysts in selective oxidation of benzyl alcohol. The reaction results showed that Au-CeO2@SBA-15 catalysts exhibited higher catalytic activity compared with Au@SBA-15 and ...

2004
Chia-min Yang Yanqin Wang Bodo Zibrowius

Cyanide-functionalized mesoporous silica SBA-15 (CN/SBA-15) with pore diameters larger than 6 nm has been prepared by a one-pot synthesis. The structure of CN/SBA-15 is affected by the amount of the functional silane 2-cyanoethyltriethoxysilane (CTES) and the conditions of co-condensation in the acidic aqueous solution of the triblock copolymer Pluronic P123: whereas direct mixing of the silica...

2011
DP Nikolic S Cvjeticanin I Petronic R Brdar D Cirovic M Bizic Z Milincic R Karan

We compared individual trait variability in 65 male and 81 female patients with spina bifida occulta (SBO) or spina bifida aperta (SBA) against 170 male and 200 female subjects randomly selected Serbian subjects without these conditions. Variability was evaluated by direct observation of 15 homozygous recessive traits (HRT), while gender was evaluated separately. Individual trait variations bet...

Journal: :Journal of Thermal Analysis and Calorimetry 2011

Journal: :ChemSusChem 2008
Kai Wang Xiujin Li Shengfu Ji Bingyao Huang Chengyue Li

A series of Ni/SBA-15/Al(2)O(3)/FeCrAl metal monolithic catalysts with Ni loadings varying between 3 % and 16 % were prepared, and their structure was characterized by various techniques. The catalytic activity of the catalyst for methane reforming with CO(2) leading to synthesis gas was evaluated using a fixed-bed reactor. The results indicate good catalytic activity of the Ni/SBA-15/Al(2)O(3)...

Journal: :Dalton transactions 2012
John Mondal Tapas Sen Asim Bhaumik

A magnetic nanoparticle conjugated mesoporous nanocatalyst (Fe(3)O(4)@mesoporous SBA-15) with a high surface area has been synthesized by chemical conjugation of magnetite (Fe(3)O(4)) nanoparticles with functionalized mesoporous SBA-15. Functionalized mesoporous SBA-15 containing surface carboxyl and amino groups was synthesized via the thiol-ene click reaction of cysteine hydrochloride and vin...

Journal: :Nanoscale 2014
C S Chen Y T Lai T C Chen C H Chen J F Lee C W Hsu H M Kao

Mesoporous SBA-15 silica materials functionalized with and without carboxylic acid groups were used to effectively control the morphology of Pt crystals, and the materials thus obtained were applied to methanol oxidation reactions. The Pt particles aggregated to form long spheroids inside the channels in pure SBA-15. When carboxylic acid groups were utilized, the SBA-15(-COOH) material facilita...

ژورنال: شیمی کاربردی 2016
فرشاد بوربور اژدری مهدی بهزاد

با آمین (-NH2) و 3-متوکسی سالیسیل آلدهید (3-MS) عامل دار شد تا سیلیکای اصلاح شده با بازشیف (3-MS-SBA-15) به دست آید. این مواد با تکنیک های طیف سنجی مادون قرمز انتقال فوریه (FTIR)، میکروسکوپ الکترونی روبشی (SEM)، جذب و واجذب نیتروژن (BET) و طیف سنجی پراش اشعه ایکس (XRD) شناسایی و بررسی شدند. جذب یون های فلزی Cu(II) و Cr(VI) از محلول های آبی روی 3-MS-SBA-15 مطالعه شد تا تاثیر عواملی از قبیل زمان ...

ژورنال: :شیمی کاربردی 0
فرشاد بوربور اژدری farshad boorboor ajdari department of chemistry, semnan university, semnan 35351-19111, iranدانشکده شیمی، دانشگاه سمنان، سمنان، ایران مهدی بهزاد mahdi behzad department of chemistry, semnan university, semnan 35351-19111, iranدانشکده شیمی، دانشگاه سمنان، سمنان، ایران

با آمین (-nh2) و 3-متوکسی سالیسیل آلدهید (3-ms) عامل دار شد تا سیلیکای اصلاح شده با بازشیف (3-ms-sba-15) به دست آید. این مواد با تکنیک های طیف سنجی مادون قرمز انتقال فوریه (ftir)، میکروسکوپ الکترونی روبشی (sem)، جذب و واجذب نیتروژن (bet) و طیف سنجی پراش اشعه ایکس (xrd) شناسایی و بررسی شدند. جذب یون های فلزی cu(ii) و cr(vi) از محلول های آبی روی 3-ms-sba-15 مطالعه شد تا تاثیر عواملی از قبیل زمان ...

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