نتایج جستجو برای: mesopore

تعداد نتایج: 405  

MCM-41 particles were synthesized using inorganic raw materials and  Cetyltrimethylammonium bromide (CTAB). The textural properties and structure of MCM-41 particles were characterized by XRD, SEM, TEM and N2 adsorption-desorption methods. To study performance of Dubinin-Astakhov and Dubinin-Raduchkevic isotherm models in evaluating mesopore volume and pore size of MCM-41 samples, the mesopore ...

Journal: :Chemical communications 2014
Li Peng Jianling Zhang Shuliang Yang Buxing Han Xinxin Sang Chengcheng Liu Guanying Yang

Mesoporous polymers with tunable large mesopores and thin mesopore walls were synthesized through a CO2-swollen micelle templating route. The mesopore size and porosity properties of the polymers can be easily modulated by adjusting CO2 pressure. The as-synthesized mesocellular polymers are excellent candidate supports for preparing heterogeneous catalysts.

Journal: :Chemical communications 2009
Jinjin Zhao Zile Hua Zhicheng Liu Yongsheng Li Limin Guo Wenbo Bu Xiangzhi Cui Meiling Ruan Hangrong Chen Jianlin Shi

We report the direct fabrication of mesoporous zeolite with a hollow spherical/ellipsoidal capsule structure by using conventional TPAOH and CTAB as soft micro- and mesopore generating templates; the mesoporous zeolite shows a high surface area of 717 m(2) g(-1) and small mesopore size of around 3 nm.

Journal: :transport phenomena in nano and micro scales 2014
f. haghighatju h. hashemipour rafsanjani

three activated carbons are synthesized in a rotary reactor at different activation times. the adsorption isotherms of the samples are measured the pore size distribution of the samples is determined using combined saito and foley method, bjh method. an average potential function has been determined inside the cylindrical pores. the effect of activation time on the pore size distribution sample...

2012
Carlos Moreno-Castilla Marta B. Dawidziuk

Carbon aerogels prepared at different carbonization temperatures and with varying mesopore volumes were used as supports for Pt catalysts to study the n-C4H10/H2 reaction. Mean Pt particle size depended on the mesopore volume of the support, showing a linear decrease when the mesopore volume increased. The turnover frequency (TOF) for hydrogenolysis was much higher than for isomerization in cat...

F. Haghighatju H. Hashemipour Rafsanjani

Three activated carbons are synthesized in a rotary reactor at different activation times. The adsorption isotherms of the samples are measured The pore size distribution of the samples is determined using combined Saito and Foley method, BJH method. An average potential function has been determined inside the cylindrical pores. The effect of activation time on the pore size distribution sample...

2015
Junkai Hu Malachi Noked Eleanor Gillette Fudong Han Zhe Gui Chunsheng Wang Sang Bok Lee

Department of Chemistry and Biochemistr MD, 20742, USA. E-mail: [email protected]; Te Department of Materials Science and Engi Park, MD, 20742, USA Department of Chemical and Biomolecula College Park, MD, 20742, USA Institute for Systems Research, University of † Electronic supplementary information mesopore volume difference and the sp OMCNW/Fe2O3; N2 adsorption–desor distributions of single templa...

Journal: :Physical chemistry chemical physics : PCCP 2010
Zhengxin Ding Jianhui Huang Xinchen Wang

Iron-doped titanium dioxide nanoarchitectures with ordered mesopore periodicity and enhanced photocatalytic activity have been developed as photofunctional materials for environmental purification.

Journal: :Chemical communications 2009
Mingbo Zheng Guangbin Ji Yongwen Wang Jian Cao Shaoqing Feng Lei Liao Qinglai Du Lifeng Zhang Zongxin Ling Jinsong Liu Ting Yu Jieming Cao Jie Tao

A new restriction effect of hard templates for the shrinkage of mesoporous polymer results in anomalous increase of the mesopore size during carbonization.

Journal: :Physical chemistry chemical physics : PCCP 2015
Myeongjin Kim Ilgeun Oh Jooheon Kim

Three-dimensional silicon carbide-based frameworks with hierarchical micro-, meso-, and macroporous structures (3MPSiC) were prepared by a template method with subsequent carbonization via an aerosol spray drying method. The micropores were derived from partial vaporization of Si atoms during the carbonization process, whereas the meso- and macropores were generated by self-assembly of the stru...

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