A master thesis from Aalborg University
Degradation of Rhodamine B using Cu-Doped SrFeO3 thermocatalysts
Author(s)
Term
4. term
Education
Publication year
2024
Submitted on
2024-06-02
Pages
51 pages
Abstract
The perovskite oxide, Strontium ferrate (SrFeO3), was synthesized through solution combustion synthesis with a copper concentration varying between 0-10%. This was done to investigate the effect of B-site on Fe4+-ions generation for the degradation of rhodamine B through thermal catalysis under dark ambient conditions. XPS results showed that with the increase in copper content, the proportion of Fe4+-ions would increase as well as the amount of oxygen present in the lattice of the perovskites compared to the surface. UV-Vis measurement showed full degradation of rhodamine B when not recycling the perovskite. The activation energy decreased showing a minimum at 5% copper Doping. The perovskites were able to degrade rhodamine B fully however, When the perovskite is recycled a hypsochromic shift is seen. This shift was assumed to be the \textit{N}-deethylization of rhodamine B into rhodamine 110 causing the liquid to turn green. During recycling the rate of degradation decreased after each cycle which could be caused by the leaching of metals. AAS results showed an extensive leaching of all metals into the solution during thermal catalysis. This could be an indication that the stability of the perovskite is low. In general SrFeO3 can degrade rhodamine B however the perovskite is quickly weakened by extensive leaching and struggles to degrade after multiple recycles. For future work, it could be interesting to try and minimize the leaching by potentially exploring other dopants. It could also be interesting to degrade other organic pollutants to see how the perovskite evolves/devolves when recycled.
Keywords
Perovskit ; Thermokatalyse ; Strontium Ferrate ; XPS ; XRD ; AAS ; Recycling ; Organic pollutant ; Rhodamine B
Documents
Colophon: This page is part of the AAU Student Projects portal, which is run by Aalborg University. Here, you can find and download publicly available bachelor's theses and master's projects from across the university dating from 2008 onwards. Student projects from before 2008 are available in printed form at Aalborg University Library.
If you have any questions about AAU Student Projects or the research registration, dissemination and analysis at Aalborg University, please feel free to contact the VBN team. You can also find more information in the AAU Student Projects FAQs.