Functional and Disordered Meso-Macroporous <I>γ</I>-Al<SUB>2−<I>x</I></SUB>M<SUB><I>x</I></SUB>O<SUB>3±<I>y</I></SUB> (M = Cu and/or Ce)

Abstract

Disordered meso-macro porous Cu-Ce-Al2O3 nanocomposite (gamma-Al(2-x)M(x)O3 +/- y, M = Cu and or Ce) with different compositions has been synthesized. In situ templated sol-gel method has been adopted with simple EDTA ethylenediamine tetra aceticacid and ethylenediamine molecules to prepare gamma-Al(2-x)M(x)O3 +/- y, (M = Cu and or Ce). Above meso-macro porous materials were characterized by structural, spectroscopy, microscopy and textural techniques. Detailed characterization indicates that Cu2+ ions are introduced into the ceria and alumina lattice positions. Nano composite nature of the gamma-Al(2-x)M(x)O3 +/- y has been confirmed by detailed microscopy investigations. Catalytic activity of the above nanocomposite materials have been screened for environmentally important CO oxidation reaction. 30% Ce-60% Al and 10% Cu containing material shows the best activity among other meso-macroporous material with (50%) 100% CO oxidation at (107 degrees C) 145 degrees C.

Endowing single-electron-trapped oxygen vacancy self-modified titanium dioxide with visible-light photocatalytic activity by grafting Fe(III) nanocluster

“…This indicates that, during the formation of V 0 • upon calcining NTA in air, an acute local structural collapse takes place in association with the enlargement of the mesoporous structure, which well coincides with the morphology change from nanotube to nanoparticle. Moreover, the surface areas of Fe(III)-V 0 • -TiO 2 samples are slightly larger than that of V 0 • -TiO 2 , which implies that with an H3 hysteresis loop in a relative pressure range of 0.60-1.00, which indicates that they are of mesoporous structure [56]. The pore size distribution profiles also confirm that as-prepared NTA, tend to be recombined thereby resulting in decreased photocatalytic activity.…”

Electronically Integrated Mesoporous Ag–TiO2 Nanocomposite Thin films for Efficient Solar Hydrogen Production in Direct Sunlight

“…[13] Herein, we report a solution-based assembly process to obtain TiO 2 nanoparticles with mesoporous network. [14,15] TiO 2 prepared through this method are further utilized for Ag deposition to obtain Ag/TiO 2 nanocomposites for solar H 2 production under one sun conditions. The Ag/TiO 2 nanocomposites prepared in this study are designated as TiAg-0.5 (0.5 wt% Ag on TiO 2 ), TiAg-1 (1 wt% Ag on TiO 2 ), TiAg-2 (2 wt% Ag on TiO 2 ), and TiAg-5 (5 wt% Ag on TiO 2 ).…”

Mechanistic Aspects of Wet and Dry CO Oxidation on Co3O4 Nanorod Surfaces: A NAP-UPS Study

“…Developing a sustainable CO oxidation catalyst that works at ambient temperatures under relevant environmental conditions is an important challenge; indeed it is essential to improve the quality of life of the current and future generations. 1,2 Various noble metal-based catalysts have been used for CO oxidation to lower the automotive emissions; 1,3 however, owing to their high cost, sustainability issues, and active temperature regime limitations, the search is still on to find alternative, cost-effective, and noble metal-free catalysts. This led to the study of 3d transition metal and metal oxide-based catalysts for CO oxidation.…”