Zeolite supported gold nanoparticles for selective photooxidation of aromatic alcohols under visible light irradiation
Zhang, Xingguang, Ke, Xuebin, & Zhu, Huaiyong (2012) Zeolite supported gold nanoparticles for selective photooxidation of aromatic alcohols under visible light irradiation. Chemistry : A European Journal, 18(26), pp. 8048-8056.
With new photocatalysts of gold nanoparticles supported on zeolite supports (Au/zeolite), oxidation of benzyl alcohol and its derivatives into the corresponding aldehydes can proceed well with a high selectivity (99%) under visible light irradiation at ambient temperature. Au/zeolite photocatalysts were characterized by UV/Vis, XPS, TEM, XRD, EDS, BET, IR, and Raman techniques. The Surface Plasmon Resonance (SPR) effect of gold nanoparticles, the adsorption capability of zeolite supports, and the molecular polarities of aromatic alcohols were demonstrated to have an essential correlation with the photocatalytic performances. In addition, the effects of light intensity, wavelength range, and the role of molecular oxygen were investigated in detail. The kinetic study indicated that the visible light irradiation required much less apparent activation energy for photooxidation compared with thermal reaction. Based on the characterization data and the photocatalytic performances, we proposed a possible photooxidation mechanism.
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|Item Type:||Journal Article|
|Keywords:||photooxidation, gold nanoparticles, surface plasmon resonance , aromatic alcohols|
|Subjects:||Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Catalysis and Mechanisms of Reactions (030601)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Chemical Thermodynamics and Energetics (030602)
Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > CHEMICAL ENGINEERING (090400) > Catalytic Process Engineering (090402)
|Divisions:||Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
|Copyright Owner:||Copyright 2012 John Wiley & Sons.|
|Deposited On:||04 May 2012 05:53|
|Last Modified:||27 Nov 2013 04:22|
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