Results 251 to 260 of about 35,853 (285)

Preparation, characterization, and polymerization of chromium complexes‐grafted Al/SBA‐15 and Ti/SBA‐15 nanosupports

Journal of Applied Polymer Science, 2012
AbstractEthylene polymerization catalysts have been prepared by grafting chromium (III) nitrate onto Al/SBA‐15 and Ti/SBA‐15 mesoporous materials. A combination of XRD, nitrogen adsorption, TEM, and inductively coupled plasma‐atomic emission spectroscopy (ICP‐AES), were used to characterize the catalysts.
Ebrahim Ahmadi, Zahra Mohamadnia, Asemeh Mashhadi‐Malekzadeh, Zahra Hamdi, Fatemeh Saghatchi   +4 more
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Effective transesterification of triglyceride with sulphonated modified SBA-15 (SBA-15-SO3H): Screening, process and mechanism

Inorganica Chimica Acta, 2018
Abstract Different morphologies of ZrO2 were produced by different templates: ZrO2(CaCO3), ZrO2(C12H25SO3Na), ZrO2(C12H25SO4Na), ZrO2(CTAB), and solid superacids, such as ZrO2/SBA-15, SO42-/ZrO2, SO42-/ZrO2/SBA-15, and SBA-15-SO3H. The catalytic transesterification activities of these catalysts were tested. The more highly acidic catalysts and higher
Ningmeng Hu, Zhaoni Kong, Liang He, Ping Ning, Junjie Gu, Rongrong Miao, Xiangqian Sun, Qingqing Guan, Peigao Duan   +8 more
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Removal of Formaldehyde Over Amine Functionalized SBA-15

Journal of Nanoscience and Nanotechnology, 2011
Amine-functionalized SBA-15 materials were synthesized by a post synthesis method. Surface area and pore size decreased by attaching functional groups to the pore surface. Furthermore, pore volume was reduced with functionalization. The carbon and nitrogen content gradually increased with the number of amine groups in the silane precursors.
Jin-Heong, Yim, Doo Il, Kim, Jung A, Bae, Young-Kwon, Park, Jong Hwa, Park, Jong-Ki, Jeon, Sung Hoon, Park, JiHyeon, Song, Seung-Soo, Kim   +8 more
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การสังเคราะห์พรีเคอร์เซอร์เชื้อเพลิงชีวภาพผ่านแอลดอลคอนเดนเซชันของเฟอร์ฟิวรัลและ 2-บิวทาโนนบนตัวเร่งปฏิกิริยา SrTiO3/SBA-15

2023
งานวิจัยนี้ศึกษาการสังเคราะห์พรีเคอร์เซอร์เชื้อเพลิงชีวภาพจากเฟอร์ฟิวรัลและ 2-บิวทาโนนผ่านแอลดอลคอนเดนเซชัน ตัวเร่งปฏิกิริยาที่ใช้ในแอลดอลคอนเดนเซชันเป็นโลหะออกไซด์ผสมที่ได้จากสตรอนเทียมไททาเนต (SrTiO3) ที่มีปริมาณสตรอนเทียมไททาเนตบนตัวรองรับ SBA15 ที่แตกต่างกัน (10%, 15%, 20% and 25%) และอัตราส่วนโดยโมลของ Sr : Ti ในช่วง 0.5 ถึง 2 ซึ่งเตรียมด้วยวิธีอ ...
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SYNTHESIS OF MAGNETIC SBA-15 AND Fe–SBA-15 MESOPOROUS NANOCOMPOSITES WITH COBALT FERRITES

Nano, 2011
A new nanocomposite based on SBA-15 mesoporous materials combined with Fe2O3 and CoFe2O4 nanoparticles was prepared via sol–gel growth. The nanostructures and magnetic properties of the SBA-15 nanocomposite were investigated by X-ray diffraction topography, high resolution transmission electron microscopy, and vibrating sample magnetometer.
HONGXIAO JIN, LIANG LI, MIN CHEN, JINGCAI XU, BO HONG, BAO HUANG, DINGFENG JIN, HONGLIANG GE, XINQING WANG   +8 more
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One-pot synthesis of Ga-SBA-15: Activity comparison with Ga-post-treated SBA-15 catalysts

Applied Catalysis A: General, 2007
Abstract Gallium containing SBA-15 mesoporous materials with different Si/Ga ratio were synthesized using an in situ sol–gel procedure with an aqueous solution of Ga(NO 3 ) 3 . The materials were characterised by means of elemental analysis, BET, XRD, TEM, and H/D isotope exchange techniques.
Z. El Berrichi, B. Louis, J.P. Tessonnier, O. Ersen, L. Cherif, M.J. Ledoux, C. Pham-Huu   +6 more
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Iron-functionalized Al-SBA-15 for benzene hydroxylation

Chem. Commun., 2008
For the first time an ordered mesoporous silica (Fe-Al-SBA-15) with catalytically active isolated Fe surface species for the hydroxylation of benzene with nitrous oxide is prepared by introduction of Fe3+ in the synthesis gel of Al-SBA-15.
Li, Y., Xia, H., Fan, F., Feng, Z., Santen, van, R.A., Hensen, E.J.M., Li, Can   +6 more
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Microstructure of the organo-modified SBA-15 (Vinyl-SBA 15) prepared under different pH

2003
Abstract Microstructure of the organo-modified SBA-15(vinyl SBA-15) prepared under different pH was investigated using a scanning electron microscopy(SEM). It was found that the morphology of the organo-modified mesoporous materials depended on pH conditions during sol-gel reaction.
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2019
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Synthesis of Fe-SBA-15, and Ti-SBA-15 via sol-gel process of silatrane and activity study of Ti-SBA-15

So-called SBA-15 (well-ordered hexagonal mesoporous silica) is an excellent support for any catalysts because of its high surface area, large pore size, and thick wall. Many metals, for examples, Fe, Ti and Mo, show a great catalytic performance in many reactions, especially, the oxidation reaction. Therefore, incorporating metals into the framework of
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