COMPOSITES BASED ON EXFOLIATED G-C3N4 AND TIO2

1 FONIOK Kryštof
Co-authors:
1,2 SMÝKALOVÁ Aneta 3 MATĚJKOVÁ Petra 1,2 PRAUS Petr 1,2 MATĚJKA Vlastimil
Institutions:
1 VSB - Technical University of Ostrava, FMST, Department of Chemistry, 17. listopadu 15, Ostrava, Czech Republic, EU, krystof.foniok@vsb.cz
2 VSB - Technical University of Ostrava, Institute of Environmental Technology, 17. Listopadu 15, Ostrava, Czech Republic, EU, petr.praus@vsb.cz
3 VSB - Technical University of Ostrava, Center of Advanced Innovation Technologies, 17. listopadu 15, Ostrava, Czech Republic, petra.matejkova@vsb.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:
169-174
ISBN:
978-80-87294-95-6
ISSN:
2694-930X
Published:
1st April 2020
Proceedings of the conference have been sent to Web of Science and Scopus for evaluation and potential indexing.
Metrics:
18 views / 8 downloads
Abstract

The photocatalytic degradation of dangerous substances is widely studied topic and many scientific reports have been already published about this issue. Undoubtedly, titanium dioxide is the most often studied compound for photocatalysis in UV region, while graphitic carbon nitride is the most often studied photocatalyst in VIS region. Combination of the photocatalysts leads to the formation of composites with improved photocatalytic performance and better applicability. In this work, the composites of exfoliated g-C3N4 and TiO2 in anatase form were prepared by mechanical mixing of both components in weight ratio 1:1. The prepared mechanical mixtures as well as the original components were thermally treated at 300 a 400°C and characterized using X-ray diffraction method, infrared (FTIR) spectroscopy, UV-VIS diffuse reflectance spectroscopy (DRS). The morphology of the particles was studied using scanning electron microscopy (SEM). The photocatalytic activity of the samples was tested using the method based on the 2h long UV assisted photodegradation of Acid Orange 7. The results indicated the highest photodegradation activity for a non-thermally treated mechanical mixture of g-C3N4 and TiO2. For the composites the photocatalytic activity (PA) decreases with the temperature of the thermal treatment, the same effect was observed for original TiO2, while for original g-C3N4 the photodegradation activity increased with the temperature of the treatment.

Keywords: Photocatalysis, g-C3N4, TiO2, composites, properties
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