ISSN:
1662-9779
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Physics
Notes:
The physicochemical characteristics (SEM, N2 adsorption, FT-IR, MASNMR) of samplesfrom kinetics (10 min, 20 min, 30 min, 1 h and 3h) of hydrolysis of tetraethyl orthosilicate (TEOS)gives new insight into the synthesis of nanosphere. The particle sizes are increased with time,however, the surface areas decreased. FT-IR investigation reveals the presence of high intensedsilanol groups of 960 cm-1 at 10 min, which reduced on progress of the reaction time. This suggeststhe partial hydrolysis and condensation of alkoxy groups in TEOS. 29Si MASNMR analysis shows thepresence three different silica species(Q4, Q3 and Q2) in 10 and 20 min samples. The intensity of Q2species decreases with time and other species concentration were increased
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/23/transtech_doi~10.4028%252Fwww.scientific.net%252FSSP.124-126.1249.pdf
Permalink