Electrochemical monitoring of nanohybrid catalyzed photodegradation of congo red
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Date
2022-07
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G. B. Pant University of Agriculture and Technology, Pantnagar
Abstract
Present thesis demonstrates development of photocatalytic plates (PCPs) from biochar (BC) strontium titanate (SrTiO3) nanohybrid BNH to investigate the periodic degradation of congo red (CR) dye through cyclic voltammetry (CV) and square wave voltammetry (SWV) in 0.1 M KCl of pH 8.0. Qualitative performance of PCPs towards photodegradation of CR were compared with their analogues derived from BC and SrTiO3. Scanning electron microscopy (SEM) reveals surface associated multiphase morphology of BNH due to uniform distribution of SrTiO3 nanoparticles in BC matrix. PCPs derived from BNH reveal improved σDC over their BC and SrTiO3 derived analogues. Current-voltage characteristics showed the ohmic behaviour of all PCPs at room temperature. Developed PCPs were investigated for photo degradation of CR under UV irradiation at 83.80 x 10-19 Ws over 120 mins. CV of CR reflects characteristic redox peaks at 0.4 and 0.58 V. Visual and electrochemical studies reveals periodic degradation of CR over PCPs. PCP derived from BNH has shown maximum degradation efficiency by 99.95 % at 120 min for CR solution at 100 ppm concentration. Present investigation successfully delivers development of viable PCPs applicable as photocatalyst for degradation of CR dye. Investigation additionally delivers a rapid and reliable electroanalytic procedure of monitoring the photodegradation of CR over PCPs. Study will further be helpful in electrochemical monitoring the photodegradation of other class of dyes in polluted water over appropriate PCPs.