An effective sonication-assisted reduction approach to synthesize highly dispersed Co nanoparticles on SiO2

Wallace Tse Loong Lim; Ziyi Zhong; Armando Borgna

doi:10.1016/j.cplett.2009.02.041

An effective sonication-assisted reduction approach to synthesize highly dispersed Co nanoparticles on SiO₂

Wallace Tse Loong Lim, Ziyi Zhong, Armando Borgna^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

20 Scopus citations

Abstract

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.

Original language	English
Pages (from-to)	122-127
Number of pages	6
Journal	Chemical Physics Letters
Volume	471
Issue number	1-3
DOIs	https://doi.org/10.1016/j.cplett.2009.02.041
State	Published - 16 Mar 2009
Externally published	Yes

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title = "An effective sonication-assisted reduction approach to synthesize highly dispersed Co nanoparticles on SiO2",

abstract = "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.",

author = "Lim, {Wallace Tse Loong} and Ziyi Zhong and Armando Borgna",

note = "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. ",

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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.

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An effective sonication-assisted reduction approach to synthesize highly dispersed Co nanoparticles on SiO₂

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