RT journal article
T1 Dye decomposition and air de-pollution performance of TiO2/SiO2 and N-TiO2/SiO2 photocatalysts coated on Portland cement mortar substates
A1 Khannyra, Souad
A1 Gil Montero, María Luisa Almoraima
A1 Addou, Mohammed
A1 Mosquera Díaz, María Jesús
A2 Química Física
K1 N-TiO2/SiO2 composites
K1 Clusters
K1 Self-cleaning
K1 NOx
K1 Portland cement mortar
K1 Air pollution
AB In this study, the newly synthesized TiO2 and N doped TiO2 clusters were added to silica sol to synthesize N-TiO2/SiO2 composites via the sol-gel method. Afterwards, the prepared cols were applied by brushing on portland cement. Doping with nitrogen significantly increased the absorption of TiO2 towards the visible region, thus, increasing the photocatalytic activity. SEM characterization of the treated samples showed that the clusters were distributed in form of aggregates on the samples' surface. The self-cleaning and air de-polluting performances were assessed through methylene blue degradation and the oxidation of nitrogen oxide, resulting in methylene blue (MB) removal of 85% and 78% after 60 min of irradiation for SN10TiO(2) and STiO2, respectively. Regarding air de-pollution performance, the newly synthesized photocatalysts showed the ability of NOx reduction. However, their efficiency was somewhat lower, in which 23.81% of NO has been oxidized by the sample SN10TiO(2), while SP25 showed a total NO conversion of 38.98%. The powdered xerogels of the newly synthesized nanoparticles revealed high photocatalytic efficiency concerning NO oxidation, resulting in a higher performance compared to those obtained by the xerogel containing P25
PB SPRINGER
SN 0944-1344
YR 2022
FD 2022
LK http://hdl.handle.net/10498/26690
UL http://hdl.handle.net/10498/26690
LA eng
NO Open Access funding provided thanks to the CRUE-CSIC agreement with Springer Nature. This project has received funding from the European Union's Horizon 2020 Research and Innovation Framework Programme under grant agreement no 760858. This work has been financed by the Spanish State Research Agency R&D programme 2020 (Project reference: PID2020-115843RB-I00) and has been co-financed by the European Union under the 2014-2020 ERDF Operational Programme and by the Department of Economic Transformation, Industry, Knowledge, and Universities of the Regional Government of Andalusia (Project reference: FEDER-UCA18-106613). S. Khannyra would also like to thank the Aula del Estrecho of the University of Cadiz for her predoctoral grant.
DS Repositorio Institucional de la Universidad de Cádiz
RD 08-nov-2026