SODIUM ZINC CARBONATE AS PRECURSOR OF NANO-ZNO IN PHOTOACTIVE NANOCOMPOSITES PREPARED BY CALCINATION PROCESS

1,2 TOKARSKÝ Jonáš
Co-authors:
3 JANÍKOVÁ Barbora 1 MAMULOVÁ KUTLÁKOVÁ Kateřina 1 CHLEBÍKOVÁ Lucie
Institutions:
1 Nanotechnology Centre, VŠB - Technical University of Ostrava, Ostrava, Czech Republic, EU
2 IT4Innovations, VŠB - Technical University of Ostrava, Ostrava, Czech Republic, EU
3 Faculty of Metallurgy and Materials Engineering, VŠB - Technical University of Ostrava, Ostrava, Czech Republic, EU
Conference:
9th International Conference on Nanomaterials - Research & Application, Hotel Voronez I, Brno, Czech Republic, EU, October 18th - 20th 2017
Proceedings:
Proceedings 9th International Conference on Nanomaterials - Research & Application
Pages:
333-338
ISBN:
978-80-87294-81-9
ISSN:
2694-930X
Published:
8th March 2018
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
27 views / 9 downloads
Abstract

Kaolin/ZnO nanocomposites were prepared by heat-induced (100 – 600 °C) decomposition of sodium zinc carbonate clusters synthesized from zinc chloride and sodium carbonate in water suspension of kaolinite-rich kaolin KKAF. X-ray diffraction analysis revealed that highly crystalline ZnO nanoparticles (NPs) are obtained in nanocomposite at a temperature above 400 °C. According to X-ray fluorescence spectroscopy, nanocomposites contain ~ 40 wt.% of ZnO NPs. Ultrafine ZnO NPs evenly distributed on the kaolinite surface were observed using transmission electron microscopy. Preferred growth of ZnO NPs on different kaolinite surfaces was investigated using molecular simulations. All nanocomposites (and pristine ZnO NPs prepared similarly as control samples) were characterized also by UV-VIS diffuse reflectance spectroscopy. Photocatalytic activity (tested by discoloration of Acid Orange 7 aqueous solution) of the nanocomposites was found higher than of pristine ZnO NPs which together with high stability (according to leaching tests) is a good prerequisite for the use of samples in various green applications.

Keywords: sodium zinc carbonate, nano-ZnO, phyllosilicate, calcination, photoactivity
Scroll to Top