Next Article in Journal
Photocatalytic Removal of Microbiological Consortium and Organic Matter in Greywater
Next Article in Special Issue
Gold Catalysts on Y-Doped Ceria Supports for Complete Benzene Oxidation
Previous Article in Journal
Advances in Magnetically Separable Photocatalysts: Smart, Recyclable Materials for Water Pollution Mitigation
Previous Article in Special Issue
New Trends in Gold Catalysts
Article Menu

Export Article

Open AccessArticle

Effects of Support and Synthetic Procedure for Sol-Immobilized Au Nanoparticles

Department of Molecular Sciences and Nanosystems, Ca’ Foscari University Venice and INSTM-RU Ve, Via Torino 155, Venezia Mestre 30170, Italy
Physics and Geology Department, University of Perugia, Via Pascoli, Perugia 06123, Italy
Author to whom correspondence should be addressed.
Academic Editors: Leonarda F. Liotta and Salvatore Scirè
Catalysts 2016, 6(6), 87;
Received: 15 March 2016 / Revised: 17 May 2016 / Accepted: 6 June 2016 / Published: 20 June 2016
(This article belongs to the Collection Gold Catalysts)
PDF [7168 KB, uploaded 20 June 2016]


New gold catalysts supported on CeO2, ZrO2 and TiO2 were synthesized by two different techniques: deposition-precipitation and colloidal method. The role of the surfactant (PVA, PVP, THPC) was also investigated. The catalysts were tested in the oxidation of glucose to gluconic acid, in aqueous environment and under mild conditions (60 °C and atmospheric pressure). TEM and SEM analyses have shown that the small size of gold nanoparticles is a necessary condition, but not sufficient for a good conversion. In fact, for an active sample, we have verified that the excess of surfactant must be removed because it would coat the surface of the catalyst. The surfactant, however, should not be completely eliminated, since it has the fundamental role of stabilizing the sample preventing nanoparticles from aggregation. It was evidenced that both the synthetic approach and the kind of support affect the catalysts’ activity. In fact, by focusing on the three different supports, with all the preparation methods, the ceria has proved to be the best support. This is due to its ability to obtain small gold nanoparticles and to its ability to accumulate oxygen. The most appropriate synthesis methodology proved to be the colloidal method with PVA. Recyclability issue was investigated too. View Full-Text
Keywords: gold catalyst; CeO2; ZrO2; TiO2; glucose; oxidation; Au sol-immobilization; PVA; PVP; THPC gold catalyst; CeO2; ZrO2; TiO2; glucose; oxidation; Au sol-immobilization; PVA; PVP; THPC

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Signoretto, M.; Menegazzo, F.; Di Michele, A.; Fioriniello, E. Effects of Support and Synthetic Procedure for Sol-Immobilized Au Nanoparticles. Catalysts 2016, 6, 87.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Catalysts EISSN 2073-4344 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top