نتایج جستجو برای: shape mesoporous ncsm

تعداد نتایج: 200293  

Journal: :Nanoscale 2012
Xiang Zhang Velmurugan Thavasi S G Mhaisalkar Seeram Ramakrishna

Hollow mesoporous one dimensional (1D) TiO(2) nanofibers are successfully prepared by co-axial electrospinning of a titanium tetraisopropoxide (TTIP) solution with two immiscible polymers; polyethylene oxide (PEO) and polyvinylpyrrolidone (PVP) using a core-shell spinneret, followed by annealing at 450 °C. The annealed mesoporous TiO(2) nanofibers are found to having a hollow structure with an ...

Journal: :Langmuir : the ACS journal of surfaces and colloids 2007
Huijuan Zhang Jun Wu Longping Zhou Dayong Zhang Limin Qi

Mesoporous silica materials with a variety of morphologies, such as monodisperse microspheres, gigantic hollow structures comprising a thin shell with a hole, and gigantic hollow structures consisting of an outer thin shell and an inner layer composed of many small spheres, have been readily synthesized in mixed water-ethanol solvents at room temperature using cetyltrimethylammonium bromide (CT...

2008
Gabriel Morales Bradley F. Chmelka Rafael van Grieken Juan A. Melero

Local differences in surface hydrophilicities/hydrophobicities of propyland arene-sulfonic-acid modified mesoporous silica and organosilica catalysts have been compared and correlated with their bulk catalytic properties for aqueous-sensitive organic reactions. Syntheses of propyland arene-SO3H-modified mesoporous silicas and organosilicas yield materials with different hydrophilicities, especi...

2007
X. Chen M. Steinhart C. Hess U. Gösele

Ordered mesoporous materials fabricated by exploiting self-assembled surfactants as molecular templates have been intensively investigated.[1–5] However, their integration into device architectures still remains a challenge. Recent efforts have focused on the synthesis of MCM (Mobil Crystalline Material)[6,7] and SBA (Santa Barbara amorphous) type[6,8–13] materials inside porous supports charac...

Journal: :Journal of the American Chemical Society 2006
Ruili Liu Yifeng Shi Ying Wan Yan Meng Fuqiang Zhang Dong Gu Zhenxia Chen Bo Tu Dongyuan Zhao

Highly ordered mesoporous polymer-silica and carbon-silica nanocomposites with interpenetrating networks have been successfully synthesized by the evaporation-induced triconstituent co-assembly method, wherein soluble resol polymer is used as an organic precursor, prehydrolyzed TEOS is used as an inorganic precursor, and triblock copolymer F127 is used as a template. It is proposed for the firs...

2014
Iman K Yazdi Matthew B Murphy Christopher Loo Xuewu Liu Mauro Ferrari Bradley K Weiner Ennio Tasciotti

Cefazolin is an antibiotic frequently used in preoperative prophylaxis of orthopedic surgery and to fight secondary infections post-operatively. Although its systemic delivery in a bulk or bolus dose is usually effective, the local and controlled release can increase its effectiveness by lowering dosages, minimizing total drug exposure, abating the development of antibiotic resistance and avoid...

Journal: :Physical chemistry chemical physics : PCCP 2011
A-Ra Ko Sang-Beom Han Young-Woo Lee Kyung-Won Park

We report well-defined mesoporous β-W(2)N nanoplates prepared by using layered WO(3)·H(2)O without templates. The tungsten nitride nanoplates exhibit typical mesoporous structures with size-controlled monomodal pore distributions.

Journal: :Nanoscale 2011
Haiyan Wang Dayong Wu Dongzhou Li Zhongwei Niu Yuzhe Chen Daihua Tang Min Wu Jianhua Cao Yong Huang

A core/sheath structured mesoporous silica nanofibre was prepared by coaxial electrospinning combined with the solvent evaporation induced surfactant assembly process. The characterization has given convincing evidence for the continuous highly ordered mesoporous structures, and its catalyst application was tested.

Journal: :Journal of the American Chemical Society 2011
Vasiliki Lykourinou Yao Chen Xi-Sen Wang Le Meng Tran Hoang Li-June Ming Ronald L Musselman Shengqian Ma

Microperoxidase-11 has for the first time been successfully immobilized into a mesoporous metal-organic framework (MOF) consisting of nanoscopic cages and it demonstrates superior enzymatic catalysis performances compared to its mesoporous silica counterpart.

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید