Abstract
The thermal transformation of Cu(NO3)2 and (Fe(NO3)3 into a CuFe2O4 spinel structure in the confined space of SBA-15 has been investigated. Interestingly, we observed the new formation mechanism of CuFe2O4 in SBA-15 via isolated metal ions (Cu2+ and Fe3+) surrounded by oxygen atoms, which gradually transformed to CuO and ferrihydrite. The latter evolved to maghemite spinel ferrite and reacted with CuO to form CuFe2O4 as the final species. In contrast, in the nonconfined space where the spinel was produced via a sol-gel combustion method, the nanostructure of CuFe2O4 immediately formed during the sol-gel combustion process and its crystallinity was improved after calcination. This is the first report on probing-phase formation using high-temperature in situ X-ray absorption fine structure.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.