Preparation of TiO₂ nanoparticles via cathode glow discharge electrolysis and its photocatalytic performance in the degradation of methylene blue

Abstract

TiO 2 nanoparticles (NPs) were prepared by cathode glow discharge electrolysis in sodium fluoride solution, in which cetyltrimethyl ammonium bromide (CTAB) acted as a stabilizer, and a Ti foil and a Pt needlepoint served as the anode and the cathode, respectively. The structure, component, and morphology of TiO 2 NPs were characterized. A possible preparation mechanism was proposed. In addition, the photocatalytic performance of TiO 2 NPs was assessed through the degradation of methylene blue (MB). The results showed that TiO 2 NPs with 12.7 nm particle size could be prepared at 500 V discharge voltage. CTAB, as a stabilizer, can diminish the agglomeration. The photocatalytic property of TiO 2 NPs for the degradation of MB with 0.15% CTAB is markedly superior to that of TiO 2 NPs without adding CTAB and commercial TiO 2 NPs (P25). K E Y W O R D S cathode glow discharge electrolysis (CGDE), nanoparticles (NPs), photocatalytic degradation, plasma, titanium dioxide (TiO 2 )

Synthesis of styrene–acrylate emulsion by glow discharge electrolysis plasma and its application for the conservation of simulated disrupting murals in Dunhuang Mogao grottoes

“…In AB section (0-340 V), the current increases linearly with increasing the voltage, which belongs to the conventional electrolytic process following Faraday's law. [35] The BC section (340-480 V) is an unstable region. In this section, a vapor sheath layer is generated around anode due to Joule heating, which isolates the Pt needle from the electrolyte solution and results in an intermittent current.…”