Alapi Tünde

Kozma G.

Kukovecz Ákos

Kónya Zoltán

Lipták K.

Náfrádi Máté

English

University of Szeged

One Step Mechanochemical Synthesis of ZnO Nanoparticles as Perovskite Substrate G. Kozma 1, K. Lipták 1, M. Náfrádi 2, T. Alapi 2, Á. Kukovecz 1, Z. Kónya 1,3 1 University of Szeged, Department of Applied and Environmental Chemistry,  Szeged, Hungary 2 University of Szeged, Department of Inorganic and Analytical Chemistry, Szeged, Hungary 3 MTA-SZTE Reaction Kinetics and Surface Chemistry Research Group, Szeged, Hungary  Zinc-oxide is one of the most researched materials with photocatalytic properties today. As a result, many research groups are involved in its production and learning about its properties. In our case, ZnO nanoparticles were prepared via mechanochemical process in one step. In many processes, ZnCO3 is prepared from ZnCl2 and then converted to ZnO by heat treatment. For preparation a planetary ball mill type Fritsch Pulverisette-6 was used with different materials milling drum. During grinding, ZnO conversion was monitored by continuous sampling and X-ray diffraction (XRD) measurements. As a result, with the settings we used, it took an average of 3 hours for almost 100% conversion of ZnO. During the production we successfully used the GTM-II, gas temperature and temperature measuring system. It is able to measure the pressure and temperature data in the grinding vessel during grinding, thus the pressure value for 100% conversion becomes predeterminable. This significantly can reduce the time that spent optimizing the production of each material, since in the absence of a GTM head, we need a different analytical tool (exp.: XRD) to determine the state of conversion. Thus we were able to improve the knowledge relative to the kinetic of mechanochemical reactions and decrease the time requirement of the synthesis optimization process. The ZnO samples were also heat treated after milling and tested for their effect on their catalytic activity against coumarin. The products were characterized by transmission electron microscopy, nitrogen adsorption surface determination and photocatalytic measurement. Keywords: ZnO, mechanochemical, nanomaterial.  Acknowledgements: The work was supported by the János Bolyai Research Fellowship of the Hungarian Academy of Sciences BO/00835/19/7, and by the professional support of the New National Excellence Program of the Ministry of Innovation and Technology ÚNKP-20-5-SZTE-656. 28

One step mechanochemical synthesis of ZnO nanoparticles as perovskite substrate

http://acta.bibl.u-szeged.hu/76805/1/npm_005_paot_006_028.pdf

One step mechanochemical synthesis of ZnO nanoparticles as perovskite substrate

Abstract

Similar works

Full text

Available Versions

University of Szeged