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master's thesis
Sinteza i karakterizacija koloidnog srebra dobivenog elektrokemijskom metodom niskog napona istosmjerne struje
diplomski rad
2020. urn:nbn:hr:167:173873
Jajetić, Hrvoje
University of Split
Faculty of Chemistry and Technology
Division of Engineering and Chemistry

Cite this document

Jajetić, H. (2020). Sinteza i karakterizacija koloidnog srebra dobivenog elektrokemijskom metodom niskog napona istosmjerne struje : diplomski rad (Master's thesis). Split: University of Split, Faculty of Chemistry and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:167:173873

Jajetić, Hrvoje. "Sinteza i karakterizacija koloidnog srebra dobivenog elektrokemijskom metodom niskog napona istosmjerne struje : diplomski rad." Master's thesis, University of Split, Faculty of Chemistry and Technology, 2020. https://urn.nsk.hr/urn:nbn:hr:167:173873

Jajetić, Hrvoje. "Sinteza i karakterizacija koloidnog srebra dobivenog elektrokemijskom metodom niskog napona istosmjerne struje : diplomski rad." Master's thesis, University of Split, Faculty of Chemistry and Technology, 2020. https://urn.nsk.hr/urn:nbn:hr:167:173873

Jajetić, H. (2020). 'Sinteza i karakterizacija koloidnog srebra dobivenog elektrokemijskom metodom niskog napona istosmjerne struje : diplomski rad', Master's thesis, University of Split, Faculty of Chemistry and Technology, accessed 16 November 2024, https://urn.nsk.hr/urn:nbn:hr:167:173873

Jajetić H. Sinteza i karakterizacija koloidnog srebra dobivenog elektrokemijskom metodom niskog napona istosmjerne struje : diplomski rad [Master's thesis]. Split: University of Split, Faculty of Chemistry and Technology; 2020 [cited 2024 November 16] Available at: https://urn.nsk.hr/urn:nbn:hr:167:173873

H. Jajetić, "Sinteza i karakterizacija koloidnog srebra dobivenog elektrokemijskom metodom niskog napona istosmjerne struje : diplomski rad", Master's thesis, University of Split, Faculty of Chemistry and Technology, Split, 2020. Available at: https://urn.nsk.hr/urn:nbn:hr:167:173873

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Metadata
TitleSinteza i karakterizacija koloidnog srebra dobivenog elektrokemijskom metodom niskog napona istosmjerne struje : diplomski rad
Title (english)Synthesis and characterization colloid silver obtained the electrochemical method of low voltage direct current : diploma thesis
AuthorHrvoje Jajetić
MentorDamir Barbir (mentor)
Committee memberAnte Prkić (predsjednik povjerenstva)
Committee memberPero Dabić (član povjerenstva)
Committee memberDamir Barbir (član povjerenstva)
GranterUniversity of Split
Faculty of Chemistry and Technology
(Division of Engineering and Chemistry)
Split
Defense date and country2020-10-23, Croatia
Scientific / art field,
discipline and subdiscipline		TECHNICAL SCIENCES
Chemical Engineering
Abstract
U ovom radu proučavano je dobivanje koloidnog srebra elektrokemijskom metodom niskog istosmjernog napona. Primijenjene su dvije srebrene elektrode čistoće 99,99 %, promjera 3,0 mm, staklena čaša s 200 cm 3 destilirane vode i spojni vodovi od izvora istosmjerne struje do elektroda. Kao izvor istosmjerne struje korišten je laboratorijski ispravljač te generator koloidnog srebra. Kao prirodni stabilizator korištena je karuba guma sintetizirana iz sjemenki rogača. Provjera pojave koloidnog srebra i procjena koncentracije srebra u otopini određena je propuštanjem laserske zrake kroz otopinu. Karakterizacija koloidnog srebra (nanočestica srebra) provedena je UV-Vis spekroskopijom te primjenom transmisijskog elektronskog mikroskopa. Primjenom elektrokemijske metode, uz ispravljač i generator kao izvor istosmjerne struje, može se proizvesti koloidno srebro zadovoljavajuće kvalitete. UV-Vis analiza potvrdila je površinsku plazmonsku rezonanciju nanočestica srebra. Primjenom PWHM metode procijenjena je veličina nanočestica srebra i kreće se u rasponu od 30-50 nm. TEM analizom uočeno je da su nanočestice srebra sferičnog oblika, osim u uzorku E1 gdje su čestice u obliku štapića i mikrometarskih dimenzija. Veličina čestica u ostala tri uzorka se kretala u rasponu od 23-52 nm. TEM analiza potvrdila je procijenjenu veličinu nanočestica srebra dobivenu PWHM metodom. Dodatak karuba gume kao prirodnog stabilizatora nema utjecaj na veličinu nanočestica srebra.
Abstract (english)
In this paper, the production of colloidal silver by the electrochemical method of low voltage direct current was studied. Two silver electrodes of 99.99% purity, 3.0 mm diameter, a glass beaker with 200 cm 3 of distilled water and connecting wires from a direct current source to the electrodes were used. A laboratory rectifier and a colloidol silver generator were used as a source of direct current. As a natural stabilizer, carob gum synthesized from carob seeds was used. Checking the occurrence of colloidal silver and estimating the concentration of silver in the solution was determined by passing a laser beam through the solution. Characterization of colloidal silver (silver nanoparticles) was performed by UV-Vis spectroscopy and using a transmission electron microscope. By applying the electrochemical method, with a rectifier and a generator as a source of direct current, colloidal silver of satisfactory quality can be produced. UV-Vis analysis confirmed the surface plasmon resonance of silver nanoparticles. Using the PWHM method, the size of silver nanoparticles was estimated and ranged from 30-50 nm. TEM analysis showed that the silver nanoparticles are spherical in shape, except in sample E1 where the particles are rod-shaped and micrometer-sized. The particle size in the other three samples ranged from 23-52 nm. TEM analysis confirmed the estimated size of silver nanoparticles obtained by the PWHM method. The addition of carob gum as a natural stabilizer has no effect on the size of silver nanoparticles.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:167:173873
Study programmeTitle: Chemical Technology; specializations in: Materials, Environmental Protection, Mediteranean Cultures, Materials and Environmental protection
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
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Created on2020-12-10 13:16:13