Photocatalytic Degradation of Azo Dye Acid Red 14 from Aqueous Solutions Using MWCNTs Nanocatalyst

Abstract

The color is a reflection of the interaction between visible light and matter. There are three criteria for color assessment such as: shades, brightness and depth (1). Azo dye Acid Red 14 is type's of acidic dyes. This group of dyes are solutions in water, and when dissolve in water, they are negatively charged, and salts are organic acids (2). Dyes and pigments used in industries for applications such as textiles, leathers, papers, foodstuffs, additives, etc (3, 4). Azo dyes are toxic and dangerous because they have aromatic ring in their structure. The advanced oxidation processes (AOPs) methods for degradation of dyes in aqueous solution were studied by many investigators (5-8). The mixed use of CNTs and H 2 O 2 to a certain extent