%0 Journal Article
%T Preparation of Novel Complex Nano-Structured Gold Catalyst Au@T<sub>i</sub>O<sub>2</sub>/MCM-22, Characterization and Remarkably Catalytic Performance for Cyclohexane Oxidation
%A Jiaqi Si
%A Lin Li
%A Yanji Zhang
%A Ji-Cheng Zhou
%A Wenbing Ouyang
%J Modern Research in Catalysis
%P 15-29
%@ 2168-4499
%D 2017
%I Scientific Research Publishing
%R 10.4236/mrc.2017.61002
%X A novel complex nano-structured Au@T<sub>i</sub>O<sub>2</sub> gold catalyst has been prepared. Au precursor could be transformed into Au@T<sub>i</sub>O<sub>2</sub>/MCM-22 with the complex nano-structured using two different methods. Samples were characterized by XRD, FT-IR, UV-vis, TEM, ICP-AES and N<sub>2</sub> adsorption-desorption. It is found that gold was anchored on the T<sub>i</sub>O<sub>2</sub>/MCM-22 as small size and uniform particles with the average diameters in the range of 5 - 9 nm. Catalytic results show that such nano-gold catalysts display excellent catalytic performance for cyclohexane oxidation. Au@T<sub>i</sub>O<sub>2</sub>/MCM-22 catalyst with the gold content of 0.5 wt% exhibits extremely exceptionally catalytic activity (12.81%) and high turnover frequency (52,121 h<sup>-1</sup>), which may be ascribed to the synergistic effects of Au and T<sub>i</sub>O2 in the complex nano-structured catalyst Au@T<sub>i</sub>O<sub>2</sub>/ MCM-22. Because of the strong metal support interaction, aggregation of active sites (Au nanoparticles) during the oxidation reaction is effectively prohibited and the catalytic activity is essentially retained.
%K Jiaqi Si
%K Lin Li
%K Yanji Zhang
%K Ji-Cheng Zhou
%K Wenbing Ouyang
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=73439