The Synthesis of a Novel Azo Dyes and Study of Photocatalytic Degradation

Abstract

Six novel aromatic azo dyes were synthesized from 4-amino-2-nitrobenzoic acid with phenol, catechol, resorcinol, hydroquinone, salicylic acid and acetylsalicylic acid with very good yield. These azo dyes confirm by FTIR, CHNS and study the photo stability used TiO2 and ZnO. The photocatalytic degradation of novel aromatic azo dyes was investigated using TiO2 and ZnO as a catalyst under 125 watts UV lamp. A series of experiments was performed to reaching to the optimum condition of degradation. The photocatalytic degradation of azo dye follows the first order reaction. In all experiments photocatalytic degradation of the azo dye has been studied using different weight of TiO2 and ZnO suspended in an aqueous solution of azo dye irradiated by irradiated by 125–UV lamp in 100 cm3 a vessel reactor at room temperature with 10 cm3/min air bubble has been passed through the solution. In addition, all result was measured using UV-Visible spectrophotometer.

Experimental and Density Functional Theory (DFT): a Dual Approach for the Adsorption of Cd (II) Ion from Aqueous Solution by Starch-Based Activated Carbon

“…The broader peak at 3480 cm -1 in corresponds to the hydroxyl group [27]. The absorption peaks at 2920 is due to -CH3 and peak at 1720 cm -1 is due to -C=O vibration [28]. The peaks on 1550 and 1115 cm -1 representing -NO2 and -SO3H groups respectively [29].…”

Synthesis, Characterization, and Biological Activity Study of New Heterocyclic Compounds

“…The mixture was refluxed overnight. Subsequently, the reaction mixture was poured into ice water, filtered, and rinsed with water [18].…”

“…To this solution, 80% hydrazine hydrate (0.01 mole, 0.48 mL) was added dropwise. The mixture was re-fluxed overnight and then poured into ice water to facilitate solvent evaporation [18].…”

Remediation of Cd (II) Ion from an Aqueous Solution by a Starch-Based Activated Carbon: Experimental and Density Functional Theory (DFT) Approach

“…FT-IR analysis is used to confirm different groups on the surface of AC (Figure The broader peak at 3450 cm −1 corresponds to the hydroxyl group [28]. The absorpt peak at 2920 is due to -CH3, and the peak at 1630 cm −1 is due to -C=O vibration [29]. T peaks on 1550 and 1120 cm −1 represent -NO2 and -SO3H groups, respectively [30].…”