RT journal article
T1 Influence of gold nanoparticles size for photocatalytic NO oxidation in low loading Au/TiO2 catalysts
A1 Luna Aguilera, Manuel Jesús
A1 Cruceira Fernández de Arjona,  Álvaro
A1 Díaz Sánchez, Ana Belén
A1 Gatica Casas, José Manuel
A1 Mosquera Díaz, María Jesús
A2 Ciencia de los Materiales e Ingeniería Metalúrgica y Química Inorgánica
A2 Ingeniería Química y Tecnología de Alimentos
A2 Química Física
K1 Au
K1 TiO2
K1 Photocatalyst
K1 AuNPs
K1 NO photooxidation
K1 NOx
AB Gold nanoparticles (AuNPs) supported on TiO2 are one of the most investigated photocat-alysts, however, the positive effect of AuNPs size reduction on Au/TiO2 activity is clear for conventional catalysis, but this relationship not strictly happens in photocatalysis. The present work investigates how small changes in the lower size range of AuNPs can affect the Au/TiO2 photoactivity in order to maximize the performance of photocatalysts with low metal loadings (<1 wt%). Precipitation-deposition methods and a speciation-controlled incipient wetness impregnation (ScIWI) method have been employed for preparing Au/TiO2 photocatalysts that exhibited a NOx elimination capacity significantly higher than pristine TiO2. Comparing the photocatalysts, ScIWI method achieved the highest gold dispersion and Au-TiO2 contact perimeter providing the most active photocatalysts, confirming the positive effect of AuNPs size reduction in the average sizes around 2 nm. In addition, on the basis of the results obtained, it has been proposed that the adsorption of nitrogen oxides species on gold has a relevant role on the NO photooxidation process.(c) 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
PB ELSEVIER
SN 2352-1864
YR 2023
FD 2023-05
LK http://hdl.handle.net/10498/28268
UL http://hdl.handle.net/10498/28268
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 11-nov-2026