期刊
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
卷 25, 期 28, 页码 27796-27807出版社
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-018-2008-0
关键词
Gas-phase photocatalysis; VOCs; Honeycomb structures; Solar light; Bacteria inactivation; TiO2
资金
- AIRPHOTOXI [PTDC/EQU-EQU/100554/2008]
- Associate Laboratory LSRE-LCM - FEDER through COMPETE2020-Programa Operacional Competitividade e Internacionalizacao (POCI) [POCI-01-0145-FEDER-006984]
- national funds through FCT-Fundacao para a Ciencia e a Tecnologia
- CAPES [2013:8674/13-2]
- FAPESP [2014:2014/16622-3]
- CAPES/FCT [308/11]
- FCT [SFRH/BPD/112900/2015, IF/00273/2013, IF/01501/2013]
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 TiO2 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 compoundVOC) 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 TiO2-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 (40-160cm), TiO2 film thickness (0.435-0.869m), feed flow rate (75-300cm(3)min(-1)), n-decane feed concentration (44-194ppm), humidity (3 and 40%), oxygen concentration (0 and 21%), and incident UV irradiance (18.9, 29.1, and 38.4W(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.
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