期刊
KOREAN JOURNAL OF CHEMICAL ENGINEERING
卷 34, 期 9, 页码 2471-2479出版社
KOREAN INSTITUTE CHEMICAL ENGINEERS
DOI: 10.1007/s11814-017-0156-4
关键词
Au-Pt Alloy; TiO2; ZrO2; Magnetically Recycling; Selectively Deposition
资金
- National Natural Science Foundation of China [21603101, 51604155]
- Natural Science Foundation of Jiangsu [BK20160774]
- Introducing Talents Fund of Nanjing Institute of Technology [YKJ201505, YKJ201310]
- Youth Key Fund of Nanjing Institute of Technology [QKJA201401]
- Opening Project of Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology [ASMA201611]
- Outstanding Scientific and Technological Innovation Team in Colleges and Universities of Jiangsu Province
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.
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