Synthesis of stainless steel nanoballs via submerged glow-discharge plasma and its photocatalytic performance in methylene blue decomposition
bin Julaihi, Muhammad Rafiq Mirza
This is an Accepted Manuscript of an article published by Taylor & Francis in Journal of Experimental Nanoscience on 2015-08-14, available online: http://www.tandfonline.com/doi/full/10.1080/17458080.2014.951408.
Stainless steel nanoparticles or 'nanoballs' have been synthesised using submerged glow-discharge plasma. Transmission electron microscopy showed that the nanoballs are uniformly spherical and size distribution estimation showed that their diameters are below 200nm. The decomposition of methylene blue solution under ultraviolet light with the wavelength of 354nm was observed in the presence of stainless steel nanoballs. A mixture of stainless steel nanoballs and 0.1% methylene blue dye was irradiated with ultraviolet light. The concentration of methylene blue was reduced to baseline level in 72hours. This shows that the stainless steel nanoballs have photocatalytic ability. In stainless steel nanoballs, methylene blue showed two different decomposition pathways; showing fast and slow reactions. Also, methylene blue was oxidised into sulphoxide before reducing into lighter by-products. X-ray diffraction analysis has shown that the nanoballs consist of Fe2O3 and Cr2O3, which are photocatalytically active species.
|Publisher||Taylor & Francis
|Date|| Issued 2015-08-14
|Identifier|| URI http://hdl.handle.net/2115/62684
Journal of experimental nanoscience