Pregled bibliografske jedinice broj: 1150639
Forced hydrolysis of FeCl3 solutions in the presence of Cr3+ ions in acidic medium
Forced hydrolysis of FeCl3 solutions in the presence of Cr3+ ions in acidic medium // Simpozij studenata doktorskih studija PMF-a : knjiga sažetaka = PhD student symposium 2021 : book of abstracts / Barišić, Dajana (ur.).
Zagreb: Prirodoslovno-matematički fakultet Sveučilišta u Zagrebu, 2021. str. 378-379 (poster, domaća recenzija, sažetak, znanstveni)
CROSBI ID: 1150639 Za ispravke kontaktirajte CROSBI podršku putem web obrasca
Naslov
Forced hydrolysis of FeCl3 solutions in the presence of Cr3+ ions in acidic medium
Autori
Robić, Marko ; Ristić, Mira ; Kuzmann, Erno ; Homonnay, Zoltan ; Krehula, Stjepko ; Musić, Svetozar
Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni
Izvornik
Simpozij studenata doktorskih studija PMF-a : knjiga sažetaka = PhD student symposium 2021 : book of abstracts
/ Barišić, Dajana - Zagreb : Prirodoslovno-matematički fakultet Sveučilišta u Zagrebu, 2021, 378-379
ISBN
978-953-6076-90-1
Skup
5. Simpozij studenata doktorskih studija PMF-a = 5th Faculty of Science PhD Student Symposium
Mjesto i datum
Zagreb, Hrvatska, 24.04.2021. - 25.04.2021
Vrsta sudjelovanja
Poster
Vrsta recenzije
Domaća recenzija
Ključne riječi
forced hydrolysis ; hematite
Sažetak
Forced hydrolyses of FeCl3 solutions in the presence of Cr3+ ions without alkali addition were investigated at 200°C. These precipitation systems were compared to corresponding reference systems. The isolated precipitates were characterized with XRD, 57Fe Mössbauer, FT-IR, FE SEM and photocatalytic measurements. Although chromium was not detected by EDS (Energy Dispersive X-ray Spectroscopy), the analysis of samples precipitated in the presence of Cr3+ ions showed several effects which can be attributed to the presence of these ions in the starting solutions. Autoclaving of FeCl3 solutions in the presence of Cr3+ impeded the transformation kinetics -FeOOH to a-Fe2O3. Relative intensities of prominent diffraction lines 104 and 110 of a-Fe2O3 changed as a result of the presence of Cr3+ ions. Changes in the size and formation of lemon-like particles instead of cube-like a-Fe2O3 particles were also noticed. The presence of Cr3+ ions in hydrolysing FeCl3 solution influenced the photocatalytic degradation of rhodamine B. Since no specific adsorption of Cr3+ ions occurred in the acidic pH medium, it was inferred that traces of Cr3+ ions enter into the structural tunnels of b-FeOOH crystals. It can be assumed that a-Fe2O3 crystals start to grow on very fine and thin b-FeOOH crystallites which were not completely dissolved, but were previously affected by Cr3+ ions.
Izvorni jezik
Engleski
Znanstvena područja
Kemija
POVEZANOST RADA
Projekti:
HRZZ-IP-2016-06-8254 - Nastajanje i svojstva 1D α-Fe2O3 nanostruktura dopiranih odabranim metalnim ionima (1D-DopedFeOX) (Krehula, Stjepko; Ristić, Mira, HRZZ ) ( CroRIS)
Ustanove:
Institut "Ruđer Bošković", Zagreb
