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PHOTOCATALYTIC CONCRETE SCREEDS WITH SELF-CLEANING AND ANTIMICROBIAL FUNCTION

1 BÍBOVÁ Hana
Co-authors:
2 ŠUBRT Jan 2 PLIŽINGROVÁ Eva 3 JAKUBIČKOVÁ Michaela 3 SÁZAVSKÁ Tereza 4 DOHNÁLEK Pavel 1 HYKRDOVÁ Lenka 1 JIRKOVSKÝ Jaromír
Institutions:
1 J. Heyrovsky Institute of Physical Chemistry CAS, Prague, Czech Republic, EU, hana.bibova@jh-inst.cas.cz
2 Institute of Inorganic Chemistry CAS, Řež, Czech Republic, EU, subrt@iic.cas.cz
3 Technical University of Liberec, Liberec, Czech Republic, EU, michaela.jakubickova@gmail.com
4 Betosan, s.r.o., Prague, Czech Republic, EU, dohnalek.p@betosan.cz
Conference:
11th International Conference on Nanomaterials - Research & Application, Hotel Voronez I, Brno, Czech Republic, EU, October 16th - 18th 2019
Proceedings:
Proceedings 11th International Conference on Nanomaterials - Research & Application
Pages:
157-162
ISBN:
978-80-87294-95-6
ISSN:
2694-930X
DOI:
https://doi.org/10.37904/nanocon.2019.8515
Published:
1st April 2020
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
1107 views / 558 downloads
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Abstract

Photocatalytic concrete screeds with self-cleaning and antimicrobial function have been developed and tested. These building materials contain sand grains with deposited composite TiO2/SiO2 layers. Two types of the screeds, grey and white, were prepared and their photoactivity and material characteristics were compared. Commercial TiO2 photocatalysts from several manufacturers were employed. Effects of different parameters, such as temperature of the coated sand calcination, humidity, and surface abrasion, were followed. Mechanical properties of the screeds were analyzed by SEM/XRD microscopy. Photocatalytic activity was tested by means of NOx oxidation (ISO norm 22197-1/2007). Antibacterial activity was evaluated by modified ISO norm 27447/2009 with Bacillus subtilis as a model organism.

Keywords: Self-cleaning screed, photodegradation, NOx, SEM, antimicrobial activity

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