A Post‐Spinel NaFeSnO4 as Novel Narrow Band Gap Photocatalyst for Visible Light Assisted Decomposition of Crystal Violet Dye

Abstract

AbstractSnO2 is a wide bandgap photocatalyst, and Fe2O3 is susceptible to the recombination of photocharges produced is heterogenized in the form of NaFeSnO4. NaFeSnO4 with post‐spinel structure having one‐dimenisonal (1D) channel is explored first time as photocatalyst. Phase purity and structure of NaFeSnO4 was examined using X‐ray diffraction (XRD). Particle morphology, light absorption behavior, band‐gap energy estimation and surface area of NaFeSnO4 were evaluated using various instrumental techniques. Extent of charge separation and charge transfer was investigated using photoluminescence (PL) analysis and electrochemical impedance spectroscopy (EIS). Photocatalytic performance of NaFeSnO4 was examined for degradation of crystal violet dye by irradiating visible light. The photocatalytic properties of NaFeSnO4 are compared with the precursor oxides Fe2O3 and SnO2. It has been demonstrated first time that NaFeSnO4 is an efficient visible light active photocatalyst than Fe2O3 and SnO2 for degradation of crystal violet dye.