| Title: | A facile method to prepare translucent anatase thin films in monolithic structures for gas stream purification |
| Author(s): | Rodrigues-Silva C; Monteiro RAR; Dezotti M; Silva AMT; Pinto E; Boaventura RAR; Vilar VJP; |
| Address: | "Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials (LSRE-LCM), Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal. mr.caito@gmail.com. Institute of Chemistry, Department of Analytical Chemistry, University of Campinas, P.O. Box 6154, Campinas, SP, 13083-970, Brazil. mr.caito@gmail.com. LEPABE - Laboratory for Process, Environment, Biotechnology and Energy Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal. Chemical Engineering Program - COPPE, Federal University of Rio de Janeiro, P.O. Box 68 502, Rio de Janeiro, RJ, 21941-972, Brazil. Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials (LSRE-LCM), Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal. Laboratory of Microbiology, Biological Sciences Department, Faculty of Pharmacy, University of Porto, Rua Jorge Viterbo Ferreira, No. 228, 4050-313, Porto, Portugal. Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), University of Porto, Terminal de Cruzeiros do Porto de Leixoes, Av. General Norton de Matos s/n, 4450-208, Matosinhos, Portugal. Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials (LSRE-LCM), Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal. vilar@fe.up.pt" |
| Journal Title: | Environ Sci Pollut Res Int |
| DOI: | 10.1007/s11356-018-2008-0 |
| ISSN/ISBN: | 1614-7499 (Electronic) 0944-1344 (Linking) |
| Abstract: | "In the present work, a facile method to prepare translucent anatase thin films on cellulose acetate monolithic (CAM) structures was developed. A simple sol-gel method was applied to synthesize photoactive TiO(2) anatase nanoparticles using tetra-n-butyl titanium as precursor. The immobilization of the photocatalyst on CAM structures was performed by a simple dip-coating method. The translucent anatase thin films allow the UV light penetration through the CAM internal walls. The photocatalytic activity was tested on the degradation of n-decane (model volatile organic compound-VOC) in gas phase, using a tubular lab-scale (irradiated by simulated solar light) and pilot-scale (irradiated by natural solar light or UVA light) reactors packed with TiO(2)-CAM structures, both equipped with compound parabolic collectors (CPCs). The efficiency of the photocatalytic oxidation (PCO) process in the degradation of n-decane molecules was studied at different operating conditions at lab-scale, such as catalytic bed size (40-160 cm), TiO(2) film thickness (0.435-0.869 mum), feed flow rate (75-300 cm(3) min(-1)), n-decane feed concentration (44-194 ppm), humidity (3 and 40%), oxygen concentration (0 and 21%), and incident UV irradiance (18.9, 29.1, and 38.4 W(UV) m(-2)). The decontamination of a bioaerosol stream was also evaluated by the PCO process, using Pseudomonas aeruginosa (Gram-negative) and Staphylococcus aureus (Gram-positive) as model bacteria. A pilot-scale unit was operated day and night, using natural sunlight and artificial UV light, to show its performance in the mineralization of n-decane air streams under real outdoor conditions. Graphical abstract Normally graphics abstract are not presented with captions/legend. The diagram is a collection of images that resume the work" |
| Keywords: | "Aerosols Air Pollutants/*analysis Alkanes/*analysis/radiation effects Catalysis Cellulose/*analogs & derivatives/chemistry Models, Theoretical Nanoparticles/*chemistry Oxidation-Reduction Pilot Projects Pseudomonas aeruginosa/radiation effects Staphylococ;" |
| Notes: | "MedlineRodrigues-Silva, Caio Monteiro, Ricardo A R Dezotti, Marcia Silva, Adrian M T Pinto, Eugenia Boaventura, Rui A R Vilar, Vitor J P eng Germany 2018/04/27 Environ Sci Pollut Res Int. 2018 Oct; 25(28):27796-27807. doi: 10.1007/s11356-018-2008-0. Epub 2018 Apr 26" |
