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Catalysts 2016, 6(5), 64; doi:10.3390/catal6050064

Selective Aerobic Oxidation of Benzyl Alcohol Driven by Visible Light on Gold Nanoparticles Supported on Hydrotalcite Modified by Nickel Ion

1
College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, China
2
Department of Chemical Engineering, Inner Mongolia Chemical Engineering Professional College, Hohhot 010070, China
*
Author to whom correspondence should be addressed.
Academic Editors: Stuart H. Taylor and Keith Hohn
Received: 28 November 2015 / Revised: 12 March 2016 / Accepted: 7 April 2016 / Published: 27 April 2016
(This article belongs to the Special Issue Catalysts for Selective Oxidation)
View Full-Text   |   Download PDF [1344 KB, uploaded 27 April 2016]   |  

Abstract

A series of hydrotalcite (HT) and hydrotalcite modified by the transition metal ion Ni(II) was prepared with a modified coprecipitation method before being loaded with gold nanoparticles. The gold supported on Ni3Al hydrotalcite with a Ni2+/Al3+ molar ratio of 3:1 was investigated. Different techniques such as X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and UV-vis diffuse reflection spectrum (UV-vis DRS) were applied to characterize the catalysts. A single-phase catalyst with high crystallinity, a layered structure and good composition was successfully fabricated. Good conversions and superior selectivities in the oxidation of benzyl alcohol and its derivatives were obtained with visible light due to the effect of localized surface plasmon resonance (LSPR) of gold nanoparticles and the synergy of the transition metal ion Ni(II). This reaction was proven to be photocatalytic by varying the intensity and wavelength of the visible light. The catalyst can be recycled three times. A corresponding photocatalytic mechanism of the oxidation reaction of benzyl alcohol was proposed. View Full-Text
Keywords: Ni(II) ion; hydrotalcite; Au nanoparticles; photo-oxidation; benzyl alcohol Ni(II) ion; hydrotalcite; Au nanoparticles; photo-oxidation; benzyl alcohol
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Guo, D.; Wang, Y.; Zhao, P.; Bai, M.; Xin, H.; Guo, Z.; Li, J. Selective Aerobic Oxidation of Benzyl Alcohol Driven by Visible Light on Gold Nanoparticles Supported on Hydrotalcite Modified by Nickel Ion. Catalysts 2016, 6, 64.

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