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Issue
Korean Journal of Chemical Engineering,
Vol.34, No.9, 2471-2479, 2017
Selective deposition of Au-Pt alloy nanoparticles on ellipsoidal zirconium titanium oxides for reduction of 4-nitrophenol
Zhang Z, Zhang J, Liu G, Xue M, Wang Z, Bu X, Wu Q, Zhao X
Au-Pt alloy nanoparticles that are selectively anchored on TiO2 surface of the ellipsoidal zirconium titanium composite oxides were successfully prepared by a facile two-step method: prefabricated binary composite oxides on the ellipsoidal Fe2O3@SiO2 by a versatile cooperative template-directed coating method, and then in situ formation of Au-Pt alloy NPs with Sn2+ as the reduction agent. The alloy catalysts were characterized by X-ray diffraction, transmission electron microscopy and X-ray photoelectron spectroscopy. The result suggested that highly dispersive and ultrafine Au-Pt alloy nanoparticles were deposited onto TiO2 surface of the binary oxides solely. The particle size of nanoalloys was closely related to the ratio of Zr : Ti in the composite oxides shell. Increasing the content of Zr element led to a growth in the size of alloy nanoparticles. When used as catalysts for the reduction of 4-nitrophenol, the prepared supported alloyed catalysts exhibited high catalytic activity, and the sample could be easily recycled without a significant decrease of the catalytic activity.
Keywords: Au-Pt Alloy; TiO2; ZrO2; Magnetically Recycling; Selectively Deposition
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[Cited By]
  1. Xiao X, Kang TU, Nam HB, Bhang SH, Lee SY, Ahn JP, Yu TY, Korean Journal of Chemical Engineering, 35(12), 2379, 2018
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