Two different topics of NanoEnviCz users will be introduced to show the range of the provided services focused on photocatalysis. The detailed program and abstracts of the presentations are attached - see below. The 31st NARECOM will take place on Wednesday, December 6th, at 2:30 p.m. Join Zoom Meeting https://cesnet.zoom.us/j/93114265990

31th NARECOM – NAnoEnviCz REsearch COmmunity Meeting

USERs TALKS:

Speaker 1:

NANOSTRUCTURED DERIVATIVES OF TITANIUM DIOXIDE, THEIR SYNTHESIS, THERMAL DECOMPOSITION AND THE APPLICATION AS SORBENTS AND PHOTOCATALYSTS

M. Motlochová

Institute of Inorganic Chemistry of the Czech Academy of Sciences

250 68 Husinec-Řež č.p. 1001

Abstract:

Titanium dioxide (TiO2), one of the most studied catalyst supports nowadays, has been extensively investigated in a variety of fields due to its stability, high electron mobility, and wide band gap between the valence and conduction bands. At the Institute of Inorganic Chemistry CAS, we prepare two different types of titania materials, each type is based on a different titania acid (peroxo- and meta-titanic). With the first type, a series of 2D-titanium dioxide nanosheets was synthesized via green and facile procedure by lyophilization of aqueous colloids of peroxotitanic acid. With the second type, a series of 1D-titanium dioxide nanorods called metatitanic acid was synthesized via simple and low-cost extraction of sulfate ions from the crystals of titanyl sulfate and their subsequent replacement with hydroxyl groups in aqueous solution while leaving the Ti-O framework intact.

The mainly studied area of application was the utilization of aforementioned materials as photocatalysts and their application as adsorbents (especially of heavy metals and radionuclides) from the aqueous solutions.

Speaker 2:

POTENTIAL OF PHOTOCATALYSIS IN REDUCING THE IMPACT OF ANTHROPOGENIC POLLUTION

L. Belháčová (a), T. Supiňková (a), J. Šubrt (b), M. Motlochová (b), E. Pližingerová (b), H. Golasovská (c)  

a Department of Electrochemical Materials, J. Heyrovský Institute of Physical Chemistry of the CAS, Dolejškova 3, Praha 18223, Czech Republic.

b Centre of Instrumental Techniques, Institute of Inorganic Chemistry of the CAS, Husinec-Řež 1001, Řež 25068, Czech Republic.

c SChem a.s., Světová 523/1; 180 00 Praha 8, Czech Republic.

Abstract:

In this contribution, we present results of photocatalytic degradation of model pollutants in an aqueous solution, using sunlight and TiO2 photocatalyst immobilized on two types of floating, environmentally friendly supports: cork grains and foamed recycled glass. SEM/EDX analysis confirmed the presence of a Ti layer on the surface of both composites. The degradation experiments were performed first on a small scale under artificial UV irradiation, then the experimental setup was transferred to the outdoor conditions. The obtained results demonstrate good performance of both composites after repeated use.

 

 

 

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