화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.34, No.9, 2471-2479, September, 2017
DOI10.1007/s11814-017-0156-4  Export Citation
Selective deposition of Au-Pt alloy nanoparticles on ellipsoidal zirconium titanium oxides for reduction of 4-nitrophenol
Zewu Zhang1, 2, †, Jinghui Zhang2, Guangqing Liu3, Mengwei Xue3, Zhangzhong Wang1, 2, Xiaohai Bu1, 2, Qiong Wu1, 2, and Xuejuan Zhao1, 2
  • 1Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology, Nanjing 21167, P. R. China
  • 2School of Materials Science and Engineering, Nanjing Institute of Technology, Nanjing 21167, P. R. China
  • 3School of Environmental Science, Nanjing Xiaozhuang University, Nanjing 21171, P. R. China
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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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