Synthesis of stainless steel nanoballs via submerged glow-discharge plasma and its photocatalytic performance in methylene blue decomposition

Muhammad Rafiq Mirza bin Julaihi, Shigeo Yatsu, Melbert Jeem, Seiichi Watanabe
2014 Journal of Experimental Nanoscience  
Stainless steel nanoparticles or "nanoballs" have been synthesized 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 presence of stainless steel nanoballs. A mixture of stainless steel nanoballs and 0.1% methylene blue dye was
more » ... ue dye was irradiated with ultraviolet light. The concentration of methylene blue was reduced to baseline level in 72 hours. This shows that the stainless steel nanoballs have photocatalytic ability. In stainless steel nanoballs, methylene blue showed two different decomposition pathways; with a fast and slow reactions. Also, methylene blue was oxidized into sulfoxide before reducing into lighter byproducts. XRD analysis has shown that the nanoballs consist of Fe 2 O 3 and Cr 2 O 3 , which are photocatalytically active species.
doi:10.1080/17458080.2014.951408 fatcat:sikalofxprejxdwoavyi755aty