Highly active photocatalytic paint for NOx abatement under real-outdoor conditions

• Type: Article in International Scientific Journal
• Date: 2014

Authors

Joana Ângelo (Author) FEUP; Luísa Andrade (Author) FEUP; Adélio Mendes (Author) FEUP

Journal

Title: Applied Catalysis A: General

Vol. 484

Pages: 17-25

ISSN: 0926-860X

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 29 Citations

ISI Web of Science

Scopus - 49 Citations

Scientific classification

CORDIS: Technological sciences > Engineering > Chemical engineering

FOS: Engineering and technology > Chemical engineering

Associated Projects

PTDC/EQU-EQU/115614/2009 - Síntese e caraterização de novos fotocatalisadores compósitos de TiO2-grafeno: aplicação no abatimento focotacalítico de NOx e fotoeletrólise da água para produção de hidrogénio

BI-DSC - Building Integrated Dye Sensitized Solar Cells

FCT/CAPES 4.4.1.00.01/2012 - Desenvolvimento de caraterização de fotocatalisadores compósitos de dióxido de titânio-grafeno

Other information

Authenticus ID: P-009-QC3

DOI: 10.1016/j.apcata.2014.07.005

Abstract (EN): In this work the photocatalytic activity of paints incorporating commercial titanium dioxide for outdoor nitrogen oxide (NO) photoabatement is assessed. The paint acts as a 3D support of the photocatalyst and thus allows a larger amount of TiO2 nanoparticles to absorb light and to contact with pollutants, when compared with a 2D photocatalytic surface. NO conversion and selectivity towards nitrites and nitrates were determined according to the standard ISO 22197-1:2007 (E). Paint coatings were formulated and tested under laboratory and outdoor conditions. The best paint formulation incorporates CristalACTiVTM PC500 photocatalyst from Cristal and calcium carbonate extender, presenting a NO conversion of ca. 70% and a selectivity of ca. 40% under laboratory conditions. The same photocatalyst but characterized in the form of an optically thick film of compressed powder presented ca. 95% and 45% of conversion and selectivity, respectively. Under the real-outdoor conditions, the best performing paint showed a NO conversion of about 95%.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9