نتایج جستجو برای: grafted sba 15

تعداد نتایج: 507367  

Journal: :Chemical communications 2005
Dae Jung Kim Brian C Dunn Paul Cole Greg Turpin Richard D Ernst Ronald J Pugmire Min Kang Ji Man Kim Edward M Eyring

The silylation of SBA-15 enhances the reducibility of cobalt oxides on a SBA-15 supported cobalt catalyst, and consequently increases the catalytic activity for Fischer-Tropsch synthesis of hydrocarbons from syngas and selectivity for longer chain products.

Journal: :Catalysis Today 2022

Both the performance and regenerability of SO2 adsorbents made CuO supported on SBA-15 ordered mesoporous silica were studied for a cyclic DeSOx process under wet dry conditions. H2O vapor decreases 16 wt% loading CuO/SBA-15 (16CuO/SBA-15) adsorbent along adsorption/regeneration cycles performed at 400 °C. Indeed, breakthrough adsorption capacity this after ten adsorption- regeneration conditio...

2009
Qingshan Lu Zhongying Wang Jiangong Li Peiyu Wang Xialei Ye

The two-solvent method was employed to prepare ZnO encapsulated in mesoporous silica (ZnO/SBA-15). The prepared ZnO/SBA-15 samples have been studied by X-ray diffraction, transmission electron microscope, X-ray photoelectron spectroscopy, nitrogen adsorption-desorption isotherm, and photoluminescence spectroscopy. The ZnO/SBA-15 nanocomposite has the ordered hexagonal mesostructure of SBA-15. Z...

2017
Jinlong Du Chunwei Shi Wenyuan Wu Xue Bian Ping Chen Qingzhu Cui Zhixuan Cui

Composite molecular sieves, FAU/SBA-15, having core-shell structure were synthesized. The synthesized composite sieves were characterized by X-ray diffractometry (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDS), pyrolysis fourier transform infrared (Py-FTIR) spectroscopy, temperature programmed desorption spectra (NH3-...

Journal: :Chemical communications 2013
Jin-Hyung Park Sung-Kwan Kim Han Sung Kim Yong Jae Cho Jeunghee Park Kyung Eun Lee Chang Won Yoon Suk Woo Nam Sang Ook Kang

The infiltration of palladium nanoparticles (PdNPs) into the channels of SBA-15 was conveniently achieved via an incipient wetness procedure employing a tetraglyme solution. Electron tomography demonstrated that PdNPs were outgrown preferentially from the channels. The resultant Pd/SBA-15 showed high performance in the dehydrogenation kinetics of ammonia borane.

Journal: :Chemical communications 2004
V Meynen E Beyers P Cool E F Vansant M Mertens H Weyten O I Lebedev G Van Tendeloo

A post-synthesis deposition of vanadium silicalite-1 zeolite nanoparticles in the pores of SBA-15 results in a highly ordered hexagonal templated silica material with V-silicalite zeolitic plugs, giving rise to an increased crystallinity of the amorphous mesoporous walls.

2010
Bing Yan Li-Li Kong

A novel kind of organic-inorganic monomer SUASi has been achieved by modifying 5-sulfosalicylic acid (SUA) with 3-aminopropyltrimethoxysilane (APS), subsequently binary and ternary Eu3+ mesoporous hybrid materials with 5-sulfosalicylic acid (SUA)-functionalized SBA-15 and 1,10-phenanthroline (phen) are synthesized by co-condensation of SUASi and TEOS in the presence of Eu3+ complex and Pluronic...

Journal: :Chemical communications 2015
Chewei Yeh Yan-Ru Sun Shing-Jong Huang Yeun-Min Tsai Soofin Cheng

The chiral selectivities were altered and high diastereo- and enantio-selectivities of the products were obtained in water medium without adding acid co-catalysts when a primary-tertiary diamine catalyst was immobilized on mesoporous SBA-15 to form a recyclable catalyst for the direct asymmetric aldol reaction of cyclohexanone with p-nitrobenzaldehyde.

Journal: :Nanoscale 2013
Ling Fei Yun Xu Xiaofei Wu Yuling Li Pu Xie Shuguang Deng Sergei Smirnov Hongmei Luo

Unlike most conventional anode materials, the newly developed TiNb2O7 (TNO) does not form a solid electrolyte interface (SEI) layer, which makes it safe for high power requiring lithium-ion batteries. In this paper, we demonstrated an SBA-15 confined synthetic approach to prepare TNO nanoparticles (S-TNO) with a small particle size around 10 nm and a large BET surface area of 79.5 m(2) g(-1). I...

2014
Xuan Hoan Vu Reinhard Eckelt Udo Armbruster Andreas Martin

Ordered mesoporous SBA-15 analogs with different Si/Al ratios were successfully prepared in a two-step process from self-assembly of ZSM-5 nanoseeds at high temperature in mildly acidic media (473 K, pH 3.5). The obtained products were characterized as SAXS, XRD, N₂ sorption, FTIR, TEM, NH₃-TPD, AAS and ICP. The results show that the initial Si/Al molar ratio of ZSM-5 precursors strongly affect...

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