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master's thesis
Sinteza koloidnog srebra kemijskim taloženjem pomoću natrijevog borohidrida
diplomski rad
Split: University of Split, Faculty of Chemistry and Technology, 2017. urn:nbn:hr:167:138784
Meheš, Mario
University of Split
Faculty of Chemistry and Technology
Division of Engineering and Chemistry

Institutional repository: Repository of the Faculty of chemistry and technology

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Meheš, M. (2017). Sinteza koloidnog srebra kemijskim taloženjem pomoću natrijevog borohidrida : diplomski rad (Master's thesis). Split: University of Split, Faculty of Chemistry and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:167:138784

Meheš, Mario. "Sinteza koloidnog srebra kemijskim taloženjem pomoću natrijevog borohidrida : diplomski rad." Master's thesis, University of Split, Faculty of Chemistry and Technology, 2017. https://urn.nsk.hr/urn:nbn:hr:167:138784

Meheš, Mario. "Sinteza koloidnog srebra kemijskim taloženjem pomoću natrijevog borohidrida : diplomski rad." Master's thesis, University of Split, Faculty of Chemistry and Technology, 2017. https://urn.nsk.hr/urn:nbn:hr:167:138784

Meheš, M. (2017). 'Sinteza koloidnog srebra kemijskim taloženjem pomoću natrijevog borohidrida : diplomski rad', Master's thesis, University of Split, Faculty of Chemistry and Technology, accessed 03 January 2025, https://urn.nsk.hr/urn:nbn:hr:167:138784

Meheš M. Sinteza koloidnog srebra kemijskim taloženjem pomoću natrijevog borohidrida : diplomski rad [Master's thesis]. Split: University of Split, Faculty of Chemistry and Technology; 2017 [cited 2025 January 03] Available at: https://urn.nsk.hr/urn:nbn:hr:167:138784

M. Meheš, "Sinteza koloidnog srebra kemijskim taloženjem pomoću natrijevog borohidrida : diplomski rad", Master's thesis, University of Split, Faculty of Chemistry and Technology, Split, 2017. Available at: https://urn.nsk.hr/urn:nbn:hr:167:138784

Metadata
TitleSinteza koloidnog srebra kemijskim taloženjem pomoću natrijevog borohidrida : diplomski rad
Title (english)Synthesis of colloidal silver by chemical precipitation with sodium borohydride : diploma thesis
AuthorMario Meheš
MentorDamir Barbir (mentor)
Committee memberPero Dabić (predsjednik povjerenstva)
Committee memberMiće Jakić (član povjerenstva)
Committee memberDamir Barbir (član povjerenstva)
GranterUniversity of Split
Faculty of Chemistry and Technology
(Division of Engineering and Chemistry)
Split
Defense date and country2017-09-06, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Chemical Engineering
Abstract
Jedinstvena antibakterijska svojstva srebra su poznata još od vremena egipatskih faraona. Otkrićem antibiotika početkom dvadesetog stoljeća srebro je uglavnom istisnuto iz uobičajene upotrebe u medicini. Prekomjernom upotrebom antibiotika pojavile su se superbakterije koje su stvorile otpornost na antibiotike, stoga je povećan interes za proučavanje antibakterijskih djelovanja koloidnog srebra. U ovom radu istražen je utjecaj različitih koncentracija srebrovog nitrata na stvaranje koloidnih čestica srebra u otopini. Koloidno srebro je pripremljeno metodom kemijskog taloženja pomoću natrijeva borohidrida. Za karakterizaciju dobivenih koloida su korišteni boja otopine, Tyndallov efekt, apsorpcija UV/Vis zračenja te veličina čestica koja je procijenjena PWHM i Mie metodom. Boja otopina je s porastom koncentracije srebra varirala od žute do tamno smeđe. Sve otopine su podjednako pokazivale Tyndallov efekt. UV/Vis spektrofotometrom je ustanovljeno da otopine apsorbiraju zračenje valnih duljina 390- 402 nm, a intenzitet opada s porastom koncentracije. PWHM i Mie metodom procijenjeno je da otopine sadrže čestice srebra veličine 12-20 nm.
Abstract (english)
Unique antibacterial properties of silver have been known since the time of Egyptian pharaohs. With the discovery of antibiotics at the beginning of the twentieth century silver is mostly pushed out from the conventional medicine. With excessive use of antibiotics, superbugs have emerged that developed resistance to antibiotics. Therefore, there is an increased interest in studying the antibacterial effects of colloidal silver. In this paper, the influence of various concentrations of silver nitrate on the formation of colloidal silver particles in the solution was investigated. Colloidal silver was prepared by a chemical precipitation method using sodium borohydride. For characterization of the obtained colloids were used color of the solution, Tyndall effect, UV/Vis absorption and particle size which was estimated by PWHM and Mie method. The color of the solution is with the increase in the concentration of silver varied from yellow to dark orange. All solutions showed Tyndall's effect equally. The UV/Vis spectrophotometer determined that the solutions absorb wavelengths of 390-402 nm and intensity decreased with increase of concentration. With PWHM and Mie method was estimated that the solutions contain silver particles of 12-20 nm.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:167:138784
Study programmeTitle: Chemical Technology; specializations in: Materials, Environmental Protection, Mediteranean Cultures
Course: Materials
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra inženjer/inženjerka kemijskog inženjerstva (magistar/magistra inženjer/inženjerka kemijskog inženjerstva)
Type of resourceText
File originBorn digital
Access conditionsOpen access
Terms of useLicence In copyright icon
Public noteKljučne riječi doradio knjižničar/ Key words are revised by the librarian
Created on2018-03-21 08:42:50