A novel synthesis of micrometer silica hollow sphere

Journal Article · Wed Feb 04 04:00:00 EST 2009 · Materials Research Bulletin

DOI:https://doi.org/10.1016/j.materresbull.2008.06.006· OSTI ID:21199663

Wen, Pan; Junwei, Ye ^[1]; Yuan, Lin; Jing, Wang ^[1]

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1. State Key Laboratory of Fine Chemicals, Dalian University of Technology, Zhongshan Road 158-43, Dalian 116012 (China)

Silica microcapsules (hollow spheres) were synthesized successfully by a novel CTAB-stabilized water/oil emulsion system mediated hydrothermal method. The addition of urea to a solution of aqueous phase was an essential step of the simple synthetic procedure of silica hollow spheres, which leads to the formation of silica hollow spheres with smooth shell during hydrothermal process. The intact hollow spheres were obtained by washing the as-synthesized solid products with distilled water to remove the organic components. A large amount of silanol groups were retained in the hollow spheres by this facile route without calcination. The morphologies and optical properties of the product were characterized by transmission electron microscopy, scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy. Furthermore, on the basis of a series of SEM observations, phenomenological elucidation of a mechanism for the growth of the silica hollow spheres has been presented.

• OSTI ID: 21199663
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 2 Vol. 44; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CALCINATION
EMULSIONS
FOURIER TRANSFORM SPECTROMETERS
HYDROTHERMAL SYNTHESIS
MORPHOLOGY
OPTICAL PROPERTIES
OXIDES
SCANNING ELECTRON MICROSCOPY
SILICA
SPHERES
SURFACE PROPERTIES
TRANSMISSION ELECTRON MICROSCOPY
UREA