Abstract
This study mainly focuses on the photocatalytic and antimicrobial properties of silver iodide supported graphitic carbon nitride (AgI@g-C3N4) composite. AgI@g-C3N4 composite was obtained through modified deposition-precipitation method and the photocatalytic performance efficiency of the synthesized AgI@g-C3N4 composite was evaluated for degradation of methyl orange (MO) dye solution under visible light irradiation. A central composite design (CCD) with response surface methodology (RSM) optimization tool was used to investigate the interactive effects of the three main independent rate determining operational process variables such as pH, AgI@g-C3N4 dosage and initial MO concentration on the colour removal efficiency. The maximum decolorization efficiency of 94.75% was obtained at pH 8.42, 2.34 g/L of AgI@g-C3N4 dosage and 17.7 mg/L of initial MO concentration. All the experimental values of decolorization efficiency were found to be in good agreement with predicted values obtained from CCD analysis (R2 = 0.9978). Furthermore, the antimicrobial activity for AgI@g-C3N4 composite in the elimination of Escherichia coli (E. coli) bacteria was studied using disc diffusion method.
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