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Your search keyword '"Xiuguo Cui"' showing total 3 results
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3 results on '"Xiuguo Cui"'

1. Synthesis of tetrakaidecahedronal SBA-16 by acidity adjusting

Author

Sik-Won Moon, Wang-Cheol Zin, and Xiuguo Cui

Subjects
chemistry.chemical_classification, Dodecahedron, Morphology (linguistics), Materials science, Chemical engineering, chemistry, Irregular shape, Salt (chemistry), Mineralogy, Mesoporous silica
Abstract

Tetrakaidecahedronal SBA-16 (cubic Im 3 m) has been synthesized in PEO 106 -PPO 70 -PEO 106 ( F127 ) template solution without inorganic salt by adjusting acidity at low temperature. Due to the pH-dependence of mesoporous silica morphology, the shapes of resultant materials show an evolution from irregular sphere → dodecahedron → tetrakaidecahedron → irregular shape as the acidity increases.

Published
2007

2. Synthesis of thick-walled SBA-15 in PEO27-PPO61-PEO27 template under relative low temperature and acidity

Author

Sik-Won Moon, Xiuguo Cui, Hailan Liu, and Wang-Cheol Zin

Subjects
Chemical engineering, chemistry, Small-angle X-ray scattering, Mineralogy, chemistry.chemical_element, Sorption, Nitrogen
Abstract

Thick walled (7.7 nm) SBA-15 has been synthesized by using PEO 27 -PPO 61 -PEO 27 (P104) as template under relative low temperature and acidity. SAXS, nitrogen sorption experiments and TEM have been utilized to characterize resultant materials.

Published
2007

3. Polypropylene glycol as a swelling agent for the synthesis of mesoporous silica (SBA-15) by amphiphilic block copolymer templating

Author

Chang-Sik Ha, Joong-Hyun Ahn, Xiuguo Cui, Won-Jei Cho, and Wang-Cheol Zin

Subjects
Materials science, Ethylene oxide, technology, industry, and agriculture, Mesoporous silica, Polyvinyl alcohol, chemistry.chemical_compound, Polypropylene glycol, chemistry, Polymer chemistry, Amphiphile, medicine, Copolymer, sense organs, Propylene oxide, Swelling, medicine.symptom
Abstract

Abstyract The role of poly(propylene glycol) (PPG) as a polymeric swelling agent in the synthesis of mesoporous silica, SBA-15, by amphiphilic triblock copolymer templating was investigated. Two different molecular weights of PPG were compared. It was found that even a low concentration of PPG expands effectively the pore size of the SBA-15 in the presence of the triblock copolymer, poly(ethylene oxide)-poly(propylene oxide)-poly(propylene oxide) (PEO- PPO-PEO) without sacrifying the wall thickness of the framework and the original morphology of pores.

Published
2003

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