Next Article in Journal
Lithium-Excess Research of Cathode Material Li2MnTiO4 for Lithium-Ion Batteries
Next Article in Special Issue
Recent Advance on Mesoporous Silica Nanoparticles-Based Controlled Release System: Intelligent Switches Open up New Horizon
Previous Article in Journal
Surface Properties and Photocatalytic Activities of the Colloidal ZnS:Mn Nanocrystals Prepared at Various pH Conditions
Previous Article in Special Issue
Smart Mesoporous Nanomaterials for Antitumor Therapy
Open AccessArticle

Synthesis of Ordered Mesoporous CuO/CeO2 Composite Frameworks as Anode Catalysts for Water Oxidation

Department of Materials Science and Technology, University of Crete, Vassilika Vouton, Heraklion 71003, Greece
*
Author to whom correspondence should be addressed.
Academic Editors: Jordi Sort and Eva Pellicer
Nanomaterials 2015, 5(4), 1971-1984; https://doi.org/10.3390/nano5041971
Received: 29 September 2015 / Revised: 9 November 2015 / Accepted: 10 November 2015 / Published: 17 November 2015
(This article belongs to the Special Issue Frontiers in Mesoporous Nanomaterials)
Cerium-rich metal oxide materials have recently emerged as promising candidates for the photocatalytic oxygen evolution reaction (OER). In this article, we report the synthesis of ordered mesoporous CuO/CeO2 composite frameworks with different contents of copper(II) oxide and demonstrate their activity for photocatalytic O2 production via UV-Vis light-driven oxidation of water. Mesoporous CuO/CeO2 materials have been successfully prepared by a nanocasting route, using mesoporous silica as a rigid template. X-ray diffraction, electron transmission microscopy and N2 porosimetry characterization of the as-prepared products reveal a mesoporous structure composed of parallel arranged nanorods, with a large surface area and a narrow pore size distribution. The molecular structure and optical properties of the composite materials were investigated with Raman and UV-Vis/NIR diffuse reflectance spectroscopy. Catalytic results indicated that incorporation of CuO clusters in the CeO2 lattice improved the photochemical properties. As a result, the CuO/CeO2 composite catalyst containing ~38 wt % CuO reaches a high O2 evolution rate of ~19.6 µmol·h−1 (or 392 µmol·h−1·g−1) with an apparent quantum efficiency of 17.6% at λ = 365 ± 10 nm. This OER activity compares favorably with that obtained from the non-porous CuO/CeO2 counterpart (~1.3 µmol·h−1) and pure mesoporous CeO2 (~1 µmol·h−1). View Full-Text
Keywords: mesoporous materials; cerium oxide; nanocasting; nanostructured; water oxidation mesoporous materials; cerium oxide; nanocasting; nanostructured; water oxidation
Show Figures

Graphical abstract

MDPI and ACS Style

Markoulaki Ι, V.; Papadas, I.T.; Kornarakis, I.; Armatas, G.S. Synthesis of Ordered Mesoporous CuO/CeO2 Composite Frameworks as Anode Catalysts for Water Oxidation. Nanomaterials 2015, 5, 1971-1984.

Show more citation formats Show less citations formats

Article Access Map by Country/Region

1
Only visits after 24 November 2015 are recorded.
Back to TopTop