TY - JOUR
T1 - An effective sonication-assisted reduction approach to synthesize highly dispersed Co nanoparticles on SiO2
AU - Lim, Wallace Tse Loong
AU - Zhong, Ziyi
AU - Borgna, Armando
N1 - Funding Information:
This research was conducted under the auspices of A∗Star, The Agency for Science, Technology and Research (Singapore), with the financial support of ICES, the Institute of Chemical and Engineering Sciences, Singapore.
PY - 2009/3/16
Y1 - 2009/3/16
N2 - A sonication-assisted method to synthesize supported Co/SiO2 nanoparticles was developed using NaBH4 as reducing agent. Co nanoparticles with an average size of 2.4 nm were obtained. Further fine-tuning of the particle size was achieved by adding stabilizer. TEM and XPS confirmed that the dispersion was significantly improved by using sonication. After calcination at 400 oC or 600 oC for 2 h, the size of the Co3O4 nanoparticles was increased to ca. 8 and 11 nm, respectively. Traces of Co2SiO4, B2O3 and Co(B4O7) were also detected after calcination at high temperatures. This method provides a new approach to the controlled synthesis of supported transition metal nanoparticles.
AB - A sonication-assisted method to synthesize supported Co/SiO2 nanoparticles was developed using NaBH4 as reducing agent. Co nanoparticles with an average size of 2.4 nm were obtained. Further fine-tuning of the particle size was achieved by adding stabilizer. TEM and XPS confirmed that the dispersion was significantly improved by using sonication. After calcination at 400 oC or 600 oC for 2 h, the size of the Co3O4 nanoparticles was increased to ca. 8 and 11 nm, respectively. Traces of Co2SiO4, B2O3 and Co(B4O7) were also detected after calcination at high temperatures. This method provides a new approach to the controlled synthesis of supported transition metal nanoparticles.
UR - http://www.scopus.com/inward/record.url?scp=61849152370&partnerID=8YFLogxK
U2 - 10.1016/j.cplett.2009.02.041
DO - 10.1016/j.cplett.2009.02.041
M3 - 文章
AN - SCOPUS:61849152370
SN - 0009-2614
VL - 471
SP - 122
EP - 127
JO - Chemical Physics Letters
JF - Chemical Physics Letters
IS - 1-3
ER -