TiO2 Modified Geopolymers for the Photocatalytic Dye Decomposition

0549197 - ÚSMH 2022 RIV CH eng J - Journal Article
Novotná, Martina - Knotek, P. - Hanzlíček, Tomáš - Kutálek, P. - Perná, Ivana - Melánová, K. - Černošková, E. - Kopecká, K.
TiO2 Modified Geopolymers for the Photocatalytic Dye Decomposition.
Crystals. Roč. 11, č. 12 (2021), č. článku 1511. ISSN 2073-4352. E-ISSN 2073-4352
Institutional support: RVO:67985891
Keywords : geopolymer * TiO2 * dye decomposition * photocatalytic activity
OECD category: Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics
Impact factor: 2.670, year: 2021
Method of publishing: Open access
https://www.mdpi.com/2073-4352/11/12/1511

This article studies the photocatalytic activity of three types of industrially produced TiO2 powder (P25, CG100 and CG300) incorporated into a parent geopolymer matrix, and their pure counterparts, based on the decomposition of Rhodamine B dye. Rhodamine B dye is applied as a model substance because it is frequently used in the textile industry and thus may be present in the wastewater. The average particle size, specific surface area and mineralogical composition of TiO2 powders have been determined. The geopolymer matrix works well as a supporting material for the CG100 and P25 pure types of TiO2 powder as these input materials have improved properties such as a higher average particle size, lower specific surface area, mineralogical composition, etc., than the CG300 TiO2 powder. These properties (or their combination) affect the photocatalytic activity of the resulting materials, which may thus become advanced composites with an additional purifying ability, e.g., materials that can be used for wastewater treatment or air purification.
Permanent Link: http://hdl.handle.net/11104/0325219