نتایج جستجو برای: mesoporous structure

تعداد نتایج: 1576810  

2005
Hoang Vinh-Thang Qinglin Huang Adrian Ungureanu Mladen Eić Serge Kaliaguine

1. Introduction Mesoporous UL-ZSM-5 materials have zeolitic structure in the form of nano-particles inter-grown in the walls of the amorphous wormhole-like aluminosilicate mesoporous precursor, and were shown to exhibit an intermediate acidity between the parent mesoporous precursor and ZSM-5 zeolite [1,2]. These materials combine the advantages of both, i.e., microporous crystalline zeolites (...

2009
Zhihong Gong Guangbin Ji Mingbo Zheng Xiaofeng Chang Weijie Dai Lijia Pan Yi Shi Youdou Zheng

Mesoporous silica nanofibers were synthesized within the pores of the anodic aluminum oxide template using a simple sol-gel method. Transmission electron microscopy investigation indicated that the concentration of the structure-directing agent (EO20PO70EO20) had a significant impact on the mesostructure of mesoporous silica nanofibers. Samples with alignment of nanochannels along the axis of m...

In this paper, a facile method for preparing sub-micron spherical mesoporous silica by the sol-gel process and cationic surfactant cetyltrimethylammonium bromide (CTAB) as a soft template was reported. Moreover, the effect of surfactant concentration on the specific surface area and the total pore volume was investigated. The specific surface area, pore characteristic, morphology, chemical comp...

Journal: :Langmuir : the ACS journal of surfaces and colloids 2013
Shuru Li Xuan Jiao Hengquan Yang

Inspired by the structure features of micelle, we attempt to synthesize a novel functionalized mesoporous silica nanosphere consisting of a hydrophobic core and a hydrophilic shell. The obtained solid materials were structurally confirmed by N(2) sorption, X-ray diffraction (XRD), and transmission electron microscopy (TEM). Their compositions were characterized by Fourier transfer infrared spec...

Journal: :Nanoscale 2012
Amirali Popat Jian Liu Qiuhong Hu Michael Kennedy Brenton Peters Gao Qing Max Lu Shi Zhang Qiao

In this proof-of-concept study, an agricultural biocide (imidacloprid) was effectively loaded into the mesoporous silica nanoparticles (MSNs) with different pore sizes, morphologies and mesoporous structures for termite control. This resulted in nanoparticles with a large surface area, tunable pore diameter and small particle size, which are ideal carriers for adsorption and controlled release ...

Journal: :The journal of physical chemistry. B 2006
Shih-Yuan Chen Ling-Yun Jang Soofin Cheng

A novel method of preparing thermally stable zirconia-based mesoporous materials was developed. The zirconia-based mesoporous materials of 2D-hexagonal structure were prepared using zirconium sulfate as the zirconium precursor and cetyltrimethylammonium (CTMA) as the pore-directing agent with the aid of salt in the synthesis solution to reduce the sulfate content in the final product and signif...

1996
Fanglin Chen Meilin Liu

Following the discovery of the MCM family of mesoporous silicates using the supramolecular templating approach,1 mesoporous materials have attracted considerable attention because of their remarkably large surface areas and narrow pore size distributions, which make them ideal candidates for catalysts, molecular sieves, and as electrodes in solid-state ionic devices. A number of related synthet...

2018
Xiaoyu Li Kang Peng Yewei Dou Jiasheng Chen Yue Zhang Gai An

Wormhole-like mesoporous tin oxide was synthesized via a facile evaporation-induced self-assembly (EISA) method, and the gas-sensing properties were evaluated for different target gases. The effect of calcination temperature on gas-sensing properties of mesoporous tin oxide was investigated. The results demonstrate that the mesoporous tin oxide sensor calcined at 400 °C exhibits remarkable sele...

2017
Bo Jiang Cuiling Li Ömer Dag Hideki Abe Toshiaki Takei Tsubasa Imai Md. Shahriar A. Hossain Md. Tofazzal Islam Kathleen Wood Joel Henzie Yusuke Yamauchi

Mesoporous noble metals are an emerging class of cutting-edge nanostructured catalysts due to their abundant exposed active sites and highly accessible surfaces. Although various noble metal (e.g. Pt, Pd and Au) structures have been synthesized by hard- and soft-templating methods, mesoporous rhodium (Rh) nanoparticles have never been generated via chemical reduction, in part due to the relativ...

2013
Dan Wang Huiming Lin Jingjie Jiang Xiao Han Wei Guo Xiaodan Wu Yingxue Jin Fengyu Qu

Magnetic and macro/mesoporous bioactive glasses were synthesized by a one-pot method via a handy salt leaching technique. It was identified to be an effective and simple synthetic strategy. The non-ionic triblock copolymer, poly(ethylene glycol)-block-poly(propylene glycol)-block-poly(ethylene glycol) (P123), was used as the structure directing agent for mesoporous structure but also as the red...

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