magistrsko delo
Marijana Lakić (Author), Aleksandra Lobnik (Mentor)

Abstract

Votle magnetne nanosfere imajo velik potencial v okoljevarstvu v senzorskih aplikacijah za določevanje prisotnosti onesnaževal in kot adsorpcijska sredstva za čiščenje težkih kovin iz voda. Njihova prednost pred nemagnetnimi nanodelci je v tem, da jih po uporabi lahko z zunanjim magnetnim poljem odstranjujemo in regeneriramo. Votle magnetne nanosfere so bile pripravljene z metodo oplaščanja predhodno pripravljenih trdnih jeder na osnovi SiO2 nanodelcev, z ovojnico iz magnetnih nanodelcev oz. magnetno fazo. Disolucijo jeder SiO2 ter s tem nastanek votlih nanosfer smo dosegli s pomočjo kombinacije dveh pufrov pri pH vrednosti 3. Uspešnost sinteze nanodelcev ter magnetnih votlih sfer smo okarakterizirali s pomočjo metod rentgenske praškovne difrakcije (XRD), presevne elektronske mikroskopije (TEM), z metodo analize specifične površine (BET), magnetizacijo z vibrirajočim vzorcem (VSM), infrardečo spektroskopijo s Fourier-jevo transformacijo (FTIR) ter vrstično elektronsko mikroskopijo (SEM).

Keywords

nanotehnologija;magnetni nanodelci;magnetizem;železovi oksidi;

Data

Language: Slovenian
Year of publishing:
Source: Maribor
Typology: 2.09 - Master's Thesis
Organization: UM FS - Faculty of Mechanical Engineering
Publisher: [M. Lakić]
UDC: 544.725:628.3(043.3)
COBISS: 16453398 Link will open in a new window
Views: 2127
Downloads: 111
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Other data

Secondary language: English
Secondary title: Development of hollow spheres for environmental applications
Secondary abstract: Hollow magnetic nanospheres have great potential in ecology in sensors applications for determination of pollutants or for adsorption and removal of heavy metal ions from water. After their use, they can be easily removed by external magnetic field and regenerated. We prepered magnetic nanospheres by core-shell method in which we used SiO2 nanoparticles as core or template and magnetic phase of nanoparticles for wrapping the templates or creating the shell arround the templates. Dissolution of SiO2 was achieved by combination of two buffers at pH 3. Effectiveness of synthesis of nanoparticles and magnetic hollow spheres was caracterized by methods such as X-ray diffraction (XRD), transmission electron microscopy (TEM), method BET for measuring the specific surface area, vibrating samplemagnetic measurement (VSM), Fourier transform infrared spectroscopy (FTIR) and by Scanning electron microscope method (SEM).
Secondary keywords: nanotechnology;magnetism;iron oxides;
URN: URN:SI:UM:
Type (COBISS): Master's thesis/paper
Thesis comment: Univ. v Mariboru, Fak. za strojništvo
Pages: XI, 98 f.
Keywords (UDC): mathematics;natural sciences;naravoslovne vede;matematika;chemistry;crystallography;mineralogy;kemija;physical chemistry;fizikalna kemija;chemistry of surface phenomena and colloids;kemija površinskih pojavov in koloidov;applied sciences;medicine;technology;uporabne znanosti;medicina;tehnika;engineering;technology in general;inženirstvo;tehnologija na splošno;public health engineering;water;sanitation;illuminating engineering;sanitarna tehnika;zdravstvena tehnika;voda;sanitarne naprave;svetlobna tehnika;sewage;treatment;disposal;utilization of sewage;odpadne vode;
ID: 993766
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