نتایج جستجو برای: silica template

تعداد نتایج: 81749  

Journal: :Journal of materials chemistry. B 2013
Dong Li Ye Zhu Chuanbin Mao

A green one-pot approach is used to synthesize surface morphology controlled hollow silica spheres in aqueous solution under ambient conditions. Using cationic polystyrene particles as a template and aminopropyltriethoxysilane (APTES) as a structural directing agent, the surface roughness and wall thickness could be easily controlled by varying the concentration of tetraethoxysilane (TEOS). Smo...

2010
Mietek Jaroniec

About ten years ago Ryoo and co-workers [1,2] reported the hard-templating (HT) synthesis of ordered mesoporous carbons (OMCs) by using ordered mesoporous silicas (OMSs) as hard templates. Five years afterward the soft-templating (ST) synthesis of OMCs has been discovered [3-6]. Significant progress has been made in both hardand soft-templating synthesis of OMCs [7-10]. Major advances in the sy...

Journal: :Chemical communications 2009
Zhe An Jing He Xin Shu Yixin Wu

Self-supported helical architectures of Ia3[combining macron]d In(2)O(3) and Fd3[combining macron]m Co(3)O(4) are fabricated for the first time using the pore-swollen chiral silica as template.

1999
Yunfeng Lu Guozhong Cao Rahul P. Kale S. Prabakar Gabriel P. López Jeffrey Brinker

Microporous silica materials with a controlled pore size and a narrow pore size distribution have been prepared by sol-gel processing using an organic-templating approach. Microporous networks were formed by pyrolytic removal of organic ligands (methacryloxypropyl groups) from organic/inorganic hybrid materials synthesized by copolymerization of 3-methacryloxypropylsilane (MPS) and tetraethoxys...

Journal: :Chemical communications 2006
Jishan Wu Jixue Li Ute Kolb Klaus Müllen

A water-soluble hexa-peri-hexabenzocoronene was prepared and shown to undergo ordered columnar self-assembly either in water solution or bulk and therefore served as template for the fabrication of porous silica with aligned nanochannels.

Journal: :Chemical communications 2009
Jeong Kuk Shon Soo Sung Kong Ji Man Kim Chang Hyun Ko Mingshi Jin Yoon Yun Lee Seong Hee Hwang Jeong Ah Yoon Jong-Nam Kim

Highly ordered mesoporous silver, which exhibits well-defined mesopores, high surface area and pore volume, has been successfully obtained using a cubic mesoporous silica, KIT-6, with controlled surface hydrophobicity as the hard template.

2015
Jian Li Jun Ma Tao Jiang Yanhuan Wang Xuemei Wen Guozhu Li

Inspired by biosilicification, biomimetic polymer-silica nanocomposite has aroused a lot of interest from the viewpoints of both scientific research and technological applications. In this study, a novel dual functional polymer, NH₂-Alginate, is synthesized through an oxidation-amination-reduction process. The "catalysis function" ensures the as-prepared NH₂-Alginate inducing biomimetic mineral...

Journal: :علوم و تکنولوژی پلیمر 0
مهدی نکومنش حسن عربی غلامرضا نجابت مهرسا امامی غلامحسین ظهوری

mcm-41 is one of the groups of mesoporous materials that have wide applications as adsorbents, ion exchangers and catalyst supports. in this work spherical and rod-like mcm-41s were synthesized in homogeneous and heterogeneous reaction media, respectively. for synthesis of these materials the cationic surfactant cetyltrimethylammonium bromide (ctmabr) was used as template and tetraethylorthosil...

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