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undergraduate thesis
Određivanje naboja i veličine čestica akustičnom spektroskopijom
2015. urn:nbn:hr:182:383247
Marčinko, Tajana
Josip Juraj Strossmayer University of Osijek
Department of Chemistry

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Marčinko, T. (2015). Određivanje naboja i veličine čestica akustičnom spektroskopijom (Undergraduate thesis). Osijek: Josip Juraj Strossmayer University of Osijek, Department of Chemistry. Retrieved from https://urn.nsk.hr/urn:nbn:hr:182:383247

Marčinko, Tajana. "Određivanje naboja i veličine čestica akustičnom spektroskopijom." Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, 2015. https://urn.nsk.hr/urn:nbn:hr:182:383247

Marčinko, Tajana. "Određivanje naboja i veličine čestica akustičnom spektroskopijom." Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, 2015. https://urn.nsk.hr/urn:nbn:hr:182:383247

Marčinko, T. (2015). 'Određivanje naboja i veličine čestica akustičnom spektroskopijom', Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, accessed 14 December 2024, https://urn.nsk.hr/urn:nbn:hr:182:383247

Marčinko T. Određivanje naboja i veličine čestica akustičnom spektroskopijom [Undergraduate thesis]. Osijek: Josip Juraj Strossmayer University of Osijek, Department of Chemistry; 2015 [cited 2024 December 14] Available at: https://urn.nsk.hr/urn:nbn:hr:182:383247

T. Marčinko, "Određivanje naboja i veličine čestica akustičnom spektroskopijom", Undergraduate thesis, Josip Juraj Strossmayer University of Osijek, Department of Chemistry, Osijek, 2015. Available at: https://urn.nsk.hr/urn:nbn:hr:182:383247

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Metadata
TitleOdređivanje naboja i veličine čestica akustičnom spektroskopijom
AuthorTajana Marčinko
MentorBerislav Marković (mentor)
GranterJosip Juraj Strossmayer University of Osijek
Department of Chemistry
Osijek
Defense date and country2015, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Chemistry
Abstract
Ovaj rad opisuje metode određivanja veličine i naboja čestica u disperznim sustavima, posebno onima u kojima su čestice disperzne faze koloidne veličine. Detaljno je opisana primjena ultrazvuka u te svrhe kao i temelji akustične spektroskopije. Tom suvremenom metodom određena je veličina i raspodjela veličine čestica tri različita uzorka titanijevog dioksida, TiO2. Jedan od tih uzoraka očito je namijenjen primjeni u proizvodnji sredstava za sunčanje dok je drugi primjenjiv u proizvodnji boja (čestice su veće). Treći uzorak je pokazao gotovo monodisperzne čestice nanometarske veličine (31 nm) i svakako je namijenjen za neke specijalne namjene. Izmjerena je i promjena zeta potencijala čestica s promjenom pH. Uočena je promjena karakteristična za okside metala: pozitivan zeta potencija pri niskim i negativan pri visokim vrijednostima pH.
Abstract (english)
This work describes various techniques for particle size and particle charge determination in disperse systems, particularly in those where particles are colloidal in size. The application of ultrasound for these purpose is described in details as well as the fundamentals ofAcoustic Spectroscopy. By using this modern technique, particle sizes and distributions of three different titania samples were determined. One of them is clearly used in preparation of sunscreens while the other for applications in paints (particles are much larger and size distribution is wider). The third samples exhibited almost monodispersed nanosized particles (31 nm) and it is undoubtedly prepared for some special applications. The variation of zeta potential with change in pH was also determined. As usual for metal oxide particles, zeta potential is positive at low pH values and negative at higher (iep is at pH 2.5).
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:182:383247
Study programmeTitle: Chemistry
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) kemije (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) kemije)
Type of resourceText
File originBorn digital
Access conditionsOpen access
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Created on2016-07-18 07:03:22