Rapid nanosheets and nanowires formation by thermal oxidation of iron in water vapour and their applications as Cr(VI) adsorbent
Source abstract
Abstract
Abstract Thermal oxidation of iron foil was done at 400 °C and 500 °C in for 2 h to form multilayered oxide scale with outer oxide layer of α-Fe2O3 comprising of nanowires and nanosheets respectively. Iron oxidized at 300 °C formed a rather compact film with no noticeable nanostructures. The morphologies of oxide formed in different oxidation environment (water vapour or dry air) were compared; densely packed nanostructures were produced in water vapour compared to dry air. Time variation study indicated rapid growth of nanostructure whereby for 1 min at 500 °C dense nanowires with some noticeable nanosheets were already observed. The nanowires and nanosheets were used to adsorb Cr(VI) from aqueous solution. Adsorption of 10 ppm of Cr(VI) on the nanowires and nanosheets was found to be successful with much faster removal efficiency for the nanosheets. Both samples displayed complete adsorption for less than 1 h.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Iron oxide chemistry and applications · Nanomaterials for catalytic reactions · Adsorption and biosorption for pollutant removal
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (22)
Show source-provided references
1. Guertin · 2004
2. WHO · 2011
3. Removal of Cr (VI) from contaminated soil by electrokinetic remediation10.1016/S0956-053X(03)00133-8 ↗
4. Photocatalytic reduction of Cr (VI) in aqueous solutions by UV irradiation with the presence of titanium dioxide10.1016/S0043-1354(00)00098-1 ↗
5. Removal and recovery of Cr (VI) from polluted ground waters: A comparative study of ion-exchange technologies10.1016/j.watres.2005.08.015 ↗
6. Studies on the adsorption of chromium (VI) onto 3-Mercaptopropionic acid coated superparamagnetic iron oxide nanoparticles10.1016/j.jcis.2014.03.025 ↗
7. Adsorption of methylene blue on low-cost adsorbents: a review10.1016/j.jhazmat.2009.12.047 ↗
8. Cornell · 2006
9. Removal and recovery of Cr (VI) from wastewater by maghemite nanoparticles10.1016/j.watres.2005.05.051 ↗
10. Preparation and characterization of magnetic Fe3O4/CNT nanoparticles by RPO method to enhance the efficient removal of Cr (VI)10.1007/s11356-013-1671-4 ↗
11. Preparation and characterization of amino-functionalized nano-Fe3O4 magnetic polymer adsorbents for removal of chromium (VI) ions10.1007/s10853-010-4574-5 ↗
12. The use of hematite for chromium (VI) removal
13. Adsorption of Cr (VI) on synthetic hematite (α-Fe2O3) nanoparticles of different morphologies10.1007/s11814-013-0204-7 ↗
14. Khanna · 2002
15. Review of the high-temperature oxidation of iron and carbon steels in air or oxygen10.1023/A:1023685905159 ↗
16. Growth of oxide whiskers on metals at high temperature10.1143/JPSJ.12.1212 ↗
17. The growth of hematite blades during the high temperature oxidation of iron10.1007/BF02642408 ↗
18. The origin of hematite nanowire growth during the thermal oxidation of iron10.1016/j.mseb.2011.12.034 ↗
19. Comparison between the oxidation of iron in oxygen and in steam at 650-750°C10.1016/j.corsci.2013.06.014 ↗
20. Effect of water vapor on the oxidation behavior of modified low alloy steels at high temperatures
21. Rapid and Mass growth of stress-induced nanowhiskers on the surfaces of evaporated polycrystalline Cu films10.1016/j.scriptamat.2007.02.036 ↗
22. Adsorption of chromium (VI) from aqueous solutions using an imidazole functionalized adsorbent10.1021/ie7017096 ↗