METHOD OF PREPARATION OF MESOPOROUS NANOSTRUCTURED FILMS OF TITANIUM DIOXIDE AND METHOD OF FEREMENTS IMMOBILISATION ON THEM

摘要

FIELD: technological processes.;SUBSTANCE: method of preparation of mesoporous nanostructured films of titanium dioxide consists in coating of hard base with water-containing composition on the basis of titanium dioxide, which contains stabiliser and cellulating polymer, further drying and calcination. In order to prepare the water-containing composition, the powder of titanium dioxide nanocrystals is used with the average size of particles from 6 to 25 Nm and with specific surface of 50-300 m²/g, which is mixed with stabiliser and exposed to ultrasonic disaggregation. Then cellulating polymer is added in the amount of 10-30% from titanium dioxide mass and water solution of soap up to mass proportion of TiO₂:H₂O=1:1-10. The prepared paste is homogenised with ultrasound, coated on the base, dried at room temperature and calcinated in the presence of air or oxygen at temperature of 400-600°C. In the method of ferment immobilisation, the ferment is adsorbed on the surface of prepared nanostructured mesoporous film of titanium dioxide in the medium of buffer solution with pH less than 8.;EFFECT: provides thickness of prepared films for immobilisation of sufficient amount of ferment on them.;7 cl, 15 ex, 6 tbl, 4 dwg