Glow discharge plasma at atmospheric pressure is well known as a source of UV radiation [21] due to the presence of the OH band (286-315 nm), NO band (260-280 nm) and N2 band (320 nm-450 nm) in the emission spectrum. Accordingly, the coupling of the non-thermal plasma of DC discharge with TiO2 can be highly effective for the degradation of the dye.
The objective of this work is to study the degradation of Acid Blue 25 dye (AB25), used in the textile industry, by DC glow discharge generated in argon atmosphere in the absence and presence of TiO2. The effect of operational parameters such as initial dye concentration, pH and catalyst load on the degradation of AB25 is investigated.