Solvent‑particles interactions during composite particles formation by pulsed laser melting of α‑Fe2O3
Authors:
- M. S. Shakeri,
- O. Polit,
- B. Grabowska‑Polanowska,
- A. Pyatenko,
- K. Suchanek,
- M. Dulski,
- J. Gurgul,
- Z. Swiatkowska‑Warkocka
Abstract
This work thoroughly investigates chemical solvent-particles interactions during the formation of composite particles by pulsed laser melting of α-Fe2O3. Two solvents, with diferent dielectric constants, such as ethyl acetate (εr= 6) and ethanol (εr= 24.6), were examined in terms of their efect on the morphology, size, and phase composition of iron oxide composites. We calculated the laser fuence curves using the heating-melting-evaporation approach to identify the critical particle size that undergoes the phase changes frst. We assessed the temperature of the particles irradiated with 390 mJ/pulse. cm2 in both solvents, including the heat dissipation between the particles and the liquid. The phase diagram of the Fe–O–C–H system was calculated to determine the temperature–pressure relationship of the system in equilibrium. We also employed an in situ GC–MS analysis to identify the volatile products during irradiation. Based on our experimental results, we concluded that the fnal diameter of the composites increases from 400 to 600 nm, along with the decreasing dielectric constant of the solvent, which is related to the diferent polarization of the organic liquid and the degree of particle agglomeration. The reduction of hematite in ethanol proceeded much faster, ending up with Fe/FeCx, while in ethyl acetate, it ended up with Fe3O4. Among all the particles, those with a diameter of 200 nm have the highest temperature and undergo the phase transition frst. The temperature of a 200 nm composite particle in ethanol is slightly lower than in ethyl acetate, i.e. 1870 K as compared to 1902 K. Phase equilibrium diagrams proved the existence of Fe, FeO, and Fe3O4 as the preferred phases at about 1900 K. Our research provides a new insight into the process of submicron particle formation during pulsed laser irradiation and allows proposing a mechanism for the growth of particles of diferent size and phase composition depending on the solvent.
- Record ID
- CUT65c778773071467ab4bce0a1b3ffb8c5
- Publication categories
- ;
- Author
- Journal series
- Scientific Reports, ISSN , e-ISSN 2045-2322, Weekly
- Issue year
- 2022
- Vol
- 12
- Pages
- [1-15]
- Article number
- 11950
- Other elements of collation
- rys.; tab.; wykr.; Bibliografia (na s.) - 13-15; Bibliografia (liczba pozycji) - 71; Oznaczenie streszczenia - Streszcz. ang.; Numeracja w czasopiśmie - Vol. 12
- Keywords in English
- laser chemistry, composite particles, colloids, reduction, pyrolysis, thermal decomposition, dielectric constant, thermodynamics
- ASJC Classification
- DOI
- DOI:10.1038/s41598-022-15729-y Opening in a new tab
- URL
- https://www.nature.com/articles/s41598-022-15729-y Opening in a new tab
- Related project
- Badanie wpływu rozpuszczalnika i rozmiaru nanocząstek na strukturę i własności fizyczne cząstek hybrydowych otrzymywanych metodą naświetlania laserowego. . Project leader at PK: , ,
- Language
- eng (en) English
- License
- Score (nominal)
- 140
- Score source
- journalList
- Score
- Publication indicators
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUT65c778773071467ab4bce0a1b3ffb8c5/
- URN
urn:pkr-prod:CUT65c778773071467ab4bce0a1b3ffb8c5
* presented citation count is obtained through Internet information analysis, and it is close to the number calculated by the Publish or PerishOpening in a new tab system.