TY - JOUR
T1 - Formation of hollow silica spheres with ordered mesoporous structure by treatment with dimethyl carbonate for selective decomposition of mesoporous silica core
AU - Okamoto, Masaki
AU - Huang, Huimin
N1 - Funding Information:
The authors acknowledge financial support of a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Science and Technology of Japan. XRD analysis and TEM observations were performed at the Center for Advanced Materials Analysis in Tokyo Institute of Technology. We thank the Art and Crafts Education and Research Support Center in Tokyo Institute of Technology for help with the SEM images.
PY - 2012/11/15
Y1 - 2012/11/15
N2 - Hollow silica spheres containing ordered mesopores with radial orientation were synthesized from core-shell structured mesoporous silica spheres with pure silica core and propyl group-grafted silica shell. The silica core was selectively impregnated with sodium acetate owing to the hydrophilicity of the core. Sodium acetate acted as a catalyst for silica decomposition with dimethyl carbonate (DMC), and after impregnation, treatment with DMC was performed to remove the core by the reaction of silica with DMC. The obtained hollow spheres contain ordered mesopores with radial orientation and are mono-disperse. The final shell thickness could be controlled by changing the shell thickness of the initial core-shell spheres, as well as by modifying the degree of decomposition of the shell. 9-Phenylanthracene encapsulated in the hollow spheres was gradually released through the mesopores as vapor into an air stream by diffusion limitation.
AB - Hollow silica spheres containing ordered mesopores with radial orientation were synthesized from core-shell structured mesoporous silica spheres with pure silica core and propyl group-grafted silica shell. The silica core was selectively impregnated with sodium acetate owing to the hydrophilicity of the core. Sodium acetate acted as a catalyst for silica decomposition with dimethyl carbonate (DMC), and after impregnation, treatment with DMC was performed to remove the core by the reaction of silica with DMC. The obtained hollow spheres contain ordered mesopores with radial orientation and are mono-disperse. The final shell thickness could be controlled by changing the shell thickness of the initial core-shell spheres, as well as by modifying the degree of decomposition of the shell. 9-Phenylanthracene encapsulated in the hollow spheres was gradually released through the mesopores as vapor into an air stream by diffusion limitation.
KW - Dimethyl carbonate
KW - Hollow sphere
KW - Mesoporous silica
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U2 - 10.1016/j.micromeso.2012.06.052
DO - 10.1016/j.micromeso.2012.06.052
M3 - Article
AN - SCOPUS:84864414708
VL - 163
SP - 102
EP - 109
JO - Microporous and Mesoporous Materials
JF - Microporous and Mesoporous Materials
SN - 1387-1811
ER -