Synthesis of tetragonal SnO₂ photocatalyst for Micro‐structural analysis and visible light driven Fenton‐like degradation of Methylene Blue

Abstract

The present study reports a simple co‐precipitation followed by solid state method for the synthesis of tetragonal SnO2 nanoparticles.The nanoparticles were characterized by XRD, FTIR, SEM, DLS, UV‐vis, and PL techniques to examine the structural properties, functional group, morphological and electronic properties. As prepared SnO2 NPs has been used for Fenton‐like degradation of Methylene blue(MB) in presence of solar light in aqueous solution.The structural analysis and Rietveld refinement revealed that the tetragonal SnO2 NPs have been well formed. The mean crystallite size of the synthesized nanoparticles was found to be 16.47 nm using the Scherrer formula.The Williamson‐Hall method determines strain throughout the crystal. The effect of various parameters such as catalyst dose, dye concentration, H2O2 concentration, pH and temperature was examined.The complete degradation of MB was obtained at pH=9. The results obtained from kinetics showed that degradation of MB dye follows pseudo‐first order rate with the rate constant k1 is 7.889×10−2 min−1. From Brunauer‐Emmet‐Teller (BET) surface analysis, we have determined the surface area and average pore size of SnO2 NPs. All parameters were measured by Brunauer‐Emmet‐Teller (BET) surface analysis with nitrogen adsorption‐desorption isotherm.The pore volume and pore diameter was calculated by BJH (Barrett‐Joyner‐Halenda) model.

Synthesis of polymeric 2D-graphitic carbon nitride (g-C3N4) nanosheets for sustainable photodegradation of organic pollutants

“…Detailed kinetic study of the as prepared g-C 3 N 4 was done by using several kinetic models such as zero order kinetic model, first order kinetic model, second order kinetic model, and Behnajady, Modirshahla and Ghanbery (BMG) kinetic model and the expressions of these models are as follows [ 52 ]: Where, c 0 (mg/L), c t (mg/L) denoted to the initial concentration of dye and the concentration of the dye at time 't' respectively. K 0 (min), k 1 (min −1 ), k 2 (mg −1 Lmin −1 ) are the rate constants of zero order, first order, and second order kinetic model respectively and m is a constant (min −1 ) while b is the dimensionless constant.…”