diplomsko delo
Mateja Klemenić (Author), Urška Lavrenčič Štangar (Mentor)

Abstract

Iz titanovega tetraklorida sem sintetizirala tridimenzionalne rožicam podobne mikrodelce TiO2, ki sem jih uporabila za pripravo treh različnih suspenzij. Suspenzije sem v različnem številu slojev nanesla na steklene ploščice in jih termično obdelala. Ploščice sem nato uporabila za fotokatalitsko razgradnjo barvila Plasmocorinth B v šaržnem reaktorju s svetlobo z valovanjem v območju ultravijoličnega spektra pri različnih pogojih. Fotokatalitsko razgradnjo barvila sem preverjala z merjenjem absorbance vzorcev s spektrofotometrom. Z vrstičnim elektronskim mikroskopom smo posneli ploščice z nanosi za podrobnejši vpogled v površino in strukturo nanosov suspenzije. Rezultati so pokazali, da se je za najboljše vezivno sredstvo izkazal polivinilpirolidon, saj je suspenzija s tem dodatkom v obliki plasti po termični obdelavi najhitreje razgrajevala barvilo. Razgradnjo barvila so dodatno pospešili trije nanosi suspenzije in prepihovanje vodne raztopine barvila s kisikom.

Keywords

titanov dioksid;mikrodelci;fotokataliza;reaktorji za fotokatalizo;UV svetloba;polprevodniki;polivinilpirolidon;spektrofotometrija;diplomske naloge;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UL FKKT - Faculty of Chemistry and Chemical Technology
Publisher: [M. Klemenić]
UDC: 546.82-31:544.526.5(043.2)
COBISS: 27430659 Link will open in a new window
Views: 428
Downloads: 87
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Other data

Secondary language: English
Secondary title: Immobilization of TiO2 nanostructured microparticles
Secondary abstract: Titanium tetrachloride was used as a precursor for the synthesis of three-dimensional flower-like TiO2 microparticles, from which three different suspensions were further prepared. The suspensions were deposited in a different number of layers to the glass slides, which were then heat-treated. The prepared plates were used for the photocatalytic degradation of Plasmocorinth B in a batch reactor under UV light and under different conditions. The photocatalytic degradation of the dye was checked by measuring the absorption of the samples with a spectrophotometer. A detailed insight into the morphology and structure of the photocatalyst was obtained with the scanning electron microscope. The results showed that polyvinylpyrrolidone proved to be the best binder as the resulting suspension in the form of layers and after heat treatment degrades the dye the fastest. The degradation of the dye was also accelerated by three layers of the suspension deposited on the glass slides and by purging the aqueous dye solution with oxygen.
Secondary keywords: titanium dioxide;microparticles;photocatalysis;UV light;semiconductor;polyvinylpyrrolidone;
Type (COBISS): Bachelor thesis/paper
Study programme: 1000374
Thesis comment: Univ. v Ljubljani, Fak. za kemijo in kemijsko tehnologijo
Pages: 28 str.
ID: 12006066