Mikrovalno potpomognuta sol-gel sinteza nanočestica titanijeva dioksida

master's thesis

• Title (english): Microwave assisted sol-gel synthesis of titanium dioxide nanoparticles
• Author: Josip Omrčen
• Mentor: Lidija Ćurković (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2024-01-25, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering

Abstract

U ovom radu opisan je postupak mikrovalno potpomognute sol-gel sinteze nanočestica titanijevog dioksida (TiO2). Za pripravu sola (koloidne otopine) titanijevog dioksida korišten je titanijev izopropoksid kao prekursor, 2-propanol kao otapalo, acetilaceton za kompleksiranje te nitratna kiselina kao katalizator. Iz pripravljene koloidne otopine sintetizirana su tri uzorka titanijevog dioksida u mikrovalnom reaktoru na temperaturi 150 °C tijekom 30 minuta i na temperaturi 200 °C tijekom 20 i 30 minuta. Fazni sastav pripravljenih uzoraka određen je rendgenskom difrakcijskom analizom (XRD) i infracrvenom spektroskopijom s Fourierovom transformacijom (FTIR). Izoterme adsorpcije/desorpcije dušika korištene su za određivanje Brunauer, Emmett i Teller (BET) specifične površine i raspodjele veličina pora. Vrijednosti energije energetskog procjepa uzoraka TiO2 određen je spektroskopijom difuzne refleksije (DRS).

Abstract (english)

In this study, the procedure of microwave assisted sol-gel synthesis of the titanium dioxide (TiO2) nanoparticles was decribed. Titanium isopropoxide was used as a precursor, 2-propanol as a solvent, acetylacetone for complexation, and nitric acid as a catalyst for the preparation of a sol (colloidal solution) of titanium dioxide. Three samples of titanium dioxide were synthesized from the prepared colloidal solution in a microwave reactor at a temperature of 150 °C for 30 minutes and at a temperature of 200 °C for 20 and 30 minutes. The phase composition of the prepared samples was determined by X-ray diffraction analysis (XRD) and Fourier transform infrared spectroscopy (FTIR). Nitrogen adsorption/desorption isotherms were used to determine Brunauer, Emmett and Teller (BET) specific surface area and pore size distribution. Energy values of band gap of TiO2 samples were determined by diffuse reflection spectroscopy (DRS).

• Keywords: titanijev dioksid; mikrovalno potpomognuta sinteza; karakterizacija
• Keywords (english): titanium dioxide; microwave-assisted synthesis; characterization
• Language: croatian
• URN:NBN: urn:nbn:hr:235:394783
• Project: Number: IP-2022-10-4400; Title: Razvoj polimera s otiskom molekula za primjenu u analizi farmaceutika i tijekom naprednih postupaka obrade voda; Acronym: MIPdePharma; Leader: Dragana Mutavdžić Pavlović; Jurisdiction: Croatia; Funder: HRZZ; Funding stream: IP
• Study programme: Title: Mechanical Engineering; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka strojarstva (magistar/magistra inženjer/inženjerka strojarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2024-01-18 23:41:00