Synthesis of porous α-Fe₂O₃ nanorods as catalyst support and A novel method to deposit small gold colloids on them

TY - JOUR

T1 - Synthesis of porous α-Fe2O3 nanorods as catalyst support and A novel method to deposit small gold colloids on them

AU - Zhong, Ziyi

AU - Teo, Jaclyn

AU - Lin, Ming

AU - Ho, Judith

N1 - Funding Information: Acknowledgements This research was supported by Agency for Science, Technology and Research in Singapore (A-STAR, ICES03-414002). Z. Z. thanks Dr. Frits M. Dautzenberg for his helpful advice, and Drs. Keith Carpenter, P.·K. Wong, J. Lin and A. Borgna for their kind support of this project.

PY - 2008/8

Y1 - 2008/8

N2 - Two novel methods, one for preparation of porous α-Fe 2O3 nanorod catalyst support and another for the deposition of gold (Au) particles on the catalyst support with high efficiency and high dispersion, were reported. In the former, FeO(OH) nanorods were first prepared by a mild hydrothermal synthesis using tetraethylammonium hydroxide (TEAOH) as the structure director. The FeO(OH) product was then converted to porous α-Fe2O3 nanorods via calcination at 300 °C. During this calcination, pores with a size distribution in the range of 1-5 nm were generated by removal of TEAOH molecules. By employing our invented Au colloid-based and sonication-assisted method, in which lysine was used as the capping agent and sonication was employed to facilitate the deposition of the Au particles, we were able to deposit very small Au particles (2-5 nm) into these pores. This method is rapid as the reaction/deposition is completed within 1 min. The prepared Au/α-Fe2O3-nanorod catalyst exhibited much higher catalytic activity than the Au/commercial α-Fe 2O3 (Fluka) catalyst.

AB - Two novel methods, one for preparation of porous α-Fe 2O3 nanorod catalyst support and another for the deposition of gold (Au) particles on the catalyst support with high efficiency and high dispersion, were reported. In the former, FeO(OH) nanorods were first prepared by a mild hydrothermal synthesis using tetraethylammonium hydroxide (TEAOH) as the structure director. The FeO(OH) product was then converted to porous α-Fe2O3 nanorods via calcination at 300 °C. During this calcination, pores with a size distribution in the range of 1-5 nm were generated by removal of TEAOH molecules. By employing our invented Au colloid-based and sonication-assisted method, in which lysine was used as the capping agent and sonication was employed to facilitate the deposition of the Au particles, we were able to deposit very small Au particles (2-5 nm) into these pores. This method is rapid as the reaction/deposition is completed within 1 min. The prepared Au/α-Fe2O3-nanorod catalyst exhibited much higher catalytic activity than the Au/commercial α-Fe 2O3 (Fluka) catalyst.

KW - FeO nanorods

KW - Hydrothermal synthesis

UR - http://www.scopus.com/inward/record.url?scp=80053959690&partnerID=8YFLogxK

U2 - 10.1007/s11244-008-9080-5

DO - 10.1007/s11244-008-9080-5

M3 - 文章

AN - SCOPUS:80053959690

SN - 1022-5528

VL - 49

SP - 216

EP - 226

JO - Topics in Catalysis

JF - Topics in Catalysis

IS - 3-4

ER -