20.500.12556/RUL-147562 Uporaba preproste optoelektronske naprave za prikaz elektrokromizma v šoli Using a simple optoelectronic device to demonstrate electrochromism in school Elektrokromni materiali reverzibilno spreminjajo svojo barvo pod vplivom električne napetosti/toka. Taki materiali so zanimivi za uporabo v raznih optičnih pametnih napravah. Elektrokromni efekt dobimo tudi z raztopinami pH indikatorjev, ki se jim barva spremeni zaradi spremembe pH. Celico, kjer se pH raztopine ob elektrodi spremeni zaradi elektrolize vode, kar posledično vodi da spremembe barve pH indikatorja, lahko uvrstimo med elektrokromne celice. V magistrskem delu sem sestavil dve tovrstni elektrokromni celici: eno v konfiguraciji s paralelnima elektrodama, drugo v konfiguraciji inverznega sendviča. Preizkusil sem različne elektrodne materiale (kovine, grafit) in elektrolite (kalijev nitrat, natrijev acetat). Za barvni odziv sem uporabil pH indikatorje bromtimol modro, fenol rdeče in izvleček kurkume. Kot nosilec elektrolita/barvila sem uporabil papirnato brisačo. Testiral in primerjal sem časovni odziv celic. Delovanje celic sem kvantitativno ovrednotil s pomočjo kronoamperometrije. Za celice z optimalnim delovanjem sem pripravil gradivo za demonstracijo elektrokromizma v srednjih šolah. Electrochromic materials reversibly change colour under the influence of an electric voltage/current. Such materials are of interest for use in various optical smart devices. The electrochromic effect is also obtained with pH indicator solutions which change colour due to a change in pH. A cell where the pH of the solution at the electrode changes due to electrolysis of the water, resulting in a change in the colour of the pH indicator, can be classified as an electrochromic cell. In my Master's thesis I have built two such electrochromic cells: one in a parallel electrode configuration, the other in an inverted sandwich configuration. I tested different electrode materials (metals, graphite) and electrolytes (potassium nitrate, sodium acetate). For the colour response I used the pH indicators bromothymol blue, phenol red and turmeric extract. I used a paper towel as a carrier for the electrolyte/dye. The time response of the cells was tested and compared. I quantified cell performance by chronoamperometry. For the cells with optimal performance I prepared material for the demonstration of electrochromism in secondary schools. elektrokromizem elektrolitska celica pH indikatorji elektroliza kronoamperometrija electrochromism electrolytic cell pH indicators electrolysis chronoamperometry true false false Slovenski jezik Angleški jezik Magistrsko delo/naloga 2023-07-07 11:10:09 2023-07-07 11:10:15 2023-08-25 12:52:22 0000-00-00 00:00:00 2023 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 22053 162305283 Zagar_Leon_-_Uporaba_preproste_optoelektronske_naprave_za_prikaz_elektrokromizma_v_soli.pdf Zagar_Leon_-_Uporaba_preproste_optoelektronske_naprave_za_prikaz_elektrokromizma_v_soli.pdf 1 CFBD184AE945A366C375B5D037ECBA07 2ae9c9cbb3b6c7362c5f5ba62fac68f781f40bb6307f76babebc4414e2d814fd a90b2334-1ca5-11ee-a314-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=171187 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0