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Gliding Arc Plasma Synthesis of MnO Nanorods for the Plasma-Catalytic Bleaching of Azoïc Amaranth Red Dye.
- Source :
-
Topics in Catalysis . Aug2017, Vol. 60 Issue 12-14, p962-972. 11p. 1 Color Photograph, 1 Black and White Photograph, 2 Diagrams, 1 Chart, 7 Graphs. - Publication Year :
- 2017
-
Abstract
- Manganese (IV) oxide (MnO) nanoparticles were synthesized, via a plasma-chemical route by using a gliding arc discharge at atmospheric pressure. α-MnO nanorods were obtained from the chemical reduction of KMnO. The synthesis yield was 96.8% after 4.5 min of exposure of the solution to the plasma. Further increase of the exposure time induced a decrease of MnO yield because of its reductive transformation into Mn ions. Particles were characterized by X-ray powder diffraction, scanning electron microscopy, Fourier Transform Infrared spectroscopy, and nitrogen physisorption. The plasma-catalytic properties of the synthesized material were tested in the bleaching of amaranth red (AR). AR bleaching efficiencies of 17 and 44% were respectively obtained when the plasma and plasma-catalyst processes were applied for 30 min with initial pH 10. The influence of the initial pH, and catalyst concentration were investigated: the AR bleaching efficiency increased linearly with the catalyst concentration and increased markedly when the pH of the solution decreased. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10225528
- Volume :
- 60
- Issue :
- 12-14
- Database :
- Academic Search Index
- Journal :
- Topics in Catalysis
- Publication Type :
- Academic Journal
- Accession number :
- 124638335
- Full Text :
- https://doi.org/10.1007/s11244-017-0761-9