TY - JOUR
T1 - Synthesis of silica-coated rhodium nanoparticles in reversed micellar solution
AU - Tago, T.
AU - Shibata, Y.
AU - Hatsuta, T.
AU - Miyajima, K.
AU - Kishida, M.
AU - Tashiro, S.
AU - Wakabayashi, K.
N1 - Funding Information:
The authors would like to thank the Research Laboratory of High Voltage Electron Microscopy, Kyushu University, for the transmission electron micrograph. This work was supported in part by a Grant-in-Aid for Exploratory Research (No. 10875152) from the Ministry of Education, Science, and Culture.
PY - 2002/3/1
Y1 - 2002/3/1
N2 - Silica (SiO2)-coated rhodium (Rh) nanoparticles were prepared using a water-in-oil microemulsion of polyoxyethylene (15) cetyl ether, cyclohexane and water. SiO2-coated Rh nanoparticles were obtained by hydrolyzing metal alkoxide (tetraethylorthosilicate, TEOS) in the solution containing Rh complex nanoparticles followed by thermal and reduction treatments. In the SiO2-coated Rh nanoparticle, a Rh particle with an average diameter of 4.1 nm was located nearly at the center of each spherical SiO2 particle. The SiO2 layer was approximately 15 nm thick. Since the Rh particle was wholly surrounded by SiO2, the Rh particle of the SiO2-coated Rh nanoparticle exhibited an extremely high thermal stability. Furthermore, the porous structure of the SiO2 layer could be controlled by the hydrolysis conditions of TEOS.
AB - Silica (SiO2)-coated rhodium (Rh) nanoparticles were prepared using a water-in-oil microemulsion of polyoxyethylene (15) cetyl ether, cyclohexane and water. SiO2-coated Rh nanoparticles were obtained by hydrolyzing metal alkoxide (tetraethylorthosilicate, TEOS) in the solution containing Rh complex nanoparticles followed by thermal and reduction treatments. In the SiO2-coated Rh nanoparticle, a Rh particle with an average diameter of 4.1 nm was located nearly at the center of each spherical SiO2 particle. The SiO2 layer was approximately 15 nm thick. Since the Rh particle was wholly surrounded by SiO2, the Rh particle of the SiO2-coated Rh nanoparticle exhibited an extremely high thermal stability. Furthermore, the porous structure of the SiO2 layer could be controlled by the hydrolysis conditions of TEOS.
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U2 - 10.1023/A:1014351915149
DO - 10.1023/A:1014351915149
M3 - Article
AN - SCOPUS:0036502486
SN - 0022-2461
VL - 37
SP - 977
EP - 982
JO - Journal of Materials Science
JF - Journal of Materials Science
IS - 5
ER -