scholarly journals Nanocasting Process to Pore-Expanded Ordered Mesoporous Carbons with 2D Hexagonal Mesostructure

2014 ◽  
Vol 2014 ◽  
pp. 1-4 ◽  
Author(s):  
Chongwen Jiang ◽  
Keyuan Zhou ◽  
Xin Zhong
Keyword(s):  
Pore Size ◽  
High Performance ◽  
Bet Surface Area ◽  
Mesoporous Carbons ◽  
Mesopore Volume ◽  
Ordered Mesoporous Carbons ◽  
Upper Limit ◽  
Ordered Mesoporous ◽  
Silica Materials ◽  
Mesoporous Silica Materials

Pore-expanded ordered mesoporous carbons with 2D hexagonal mesostructure were synthesized by a simple nanocasting process. We adopted sucrose as carbon precursors, mesoporous silica materials SBA-15 as the hard templates, and hexane as micelle swelling agents. The pore size distribution of OMCs was narrow and centered at 5.4 nm, which is larger than the upper limit of pore diameters typically reported for CMK-3. The BET surface area and mesopore volume of PE-CMK-3 can reach to 1213.47 m2/g and 1.56 cm3/g, respectively, indicating that choosing large pore size materials as template is good for preparation of high performance of OMCs.

Three-dimensionally ordered mesoporous carbons activated by hot ammonia treatment as high-performance anode materials in lithium-ion batteries

2015 ◽  
Vol 39 (8) ◽  
pp. 6178-6185 ◽  
Author(s):  
Bin Han ◽  
Eun Joo Lee ◽  
Won Ho Choi ◽  
Won Cheol Yoo ◽  
Jin Ho Bang
Keyword(s):  
Anode Materials ◽  
High Performance ◽  
Lithium Ion ◽  
Mesoporous Carbons ◽  
Li Ion Battery ◽  
Ammonia Treatment ◽  
Ordered Mesoporous Carbons ◽  
Ordered Mesoporous ◽  
Li Ion ◽  
Battery Application

A simple NH3 heat-treatment is a facile and effective way to boost the performance of three-dimensionally ordered mesoporous carbons in Li-ion battery application.

scholarly journals Simple Synthesis and Characterization of Hexagonal and Ordered Al–MCM–41 from Natural Perlite

Minerals ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 264 ◽  
Author(s):  
Hongyun Chen ◽  
Siyao Fu ◽  
Liangjie Fu ◽  
Huaming Yang ◽  
Deliang Chen
Keyword(s):  
Mesoporous Silica ◽  
Bet Surface Area ◽  
Ammonium Bromide ◽  
X Ray Diffraction ◽  
X Ray ◽  
Chemical Structures ◽  
Ordered Mesoporous ◽  
Silica Materials ◽  
Mesoporous Silica Materials ◽  
Mcm 41

Silica reagents are expensive and toxic for use in the synthesis of mesoporous silica materials. It is imperative to take an interest in green silicon sources. In this paper, we report the synthesis of hexagonal and ordered aluminum-containing mesoporous silica materials (Al–MCM–41) from natural perlite mineral without addition of silica or aluminum reagents. A pretreatment process involving acid leaching, alkali leaching, and strongly acidic cation exchange resins treatment was critical to obtain silicon and aluminum sources from natural perlite mineral. The Al–MCM–41 material was synthesized via a hydrothermal reaction with hexadecyl trimethyl ammonium bromide (CTAB) as the template and subsequent calcination. The resulting mesophase had a hexagonal and ordered mesoporous structure, confirmed by small-angle X-ray diffraction (SAXRD) and transmission electron microscopy (TEM). Al–MCM–41 material had a high Brunauer–Emmet–Teller (BET) surface area of 1024 m2/g, pore volume of 0.72 cm3/g and an average pore diameter of 2.8 nm with a pore size distribution centered at 2.5 nm. The thermal behavior of the as-synthesized samples during calcination was investigated by thermogravimetry (TG) and differential thermogravimetry (DTG) analysis. The Al–MCM–41 material showed a negative surface charge in aqueous solution with the pH value ranging from 2 to 13. The variations of chemical structures from natural perlite to Al–MCM–41 were traced by wide-angle X-ray diffraction (WAXRD) and Fourier-transform infrared spectroscopy (FTIR). A proposed mechanism for the synthesis of hexagonal and ordered mesoporous silica materials from natural perlite is discussed.

scholarly journals Functionalized, hierarchical and ordered mesoporous carbons for high-performance supercapacitors

2016 ◽  
Vol 4 (16) ◽  
pp. 6140-6148 ◽  
Author(s):  
A. Sánchez-Sánchez ◽  
V. Fierro ◽  
M. T. Izquierdo ◽  
A. Celzard
Keyword(s):  
High Performance ◽  
Mesoporous Carbons ◽  
Ordered Mesoporous Carbons ◽  
Ordered Mesoporous
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