Effluent degradation capability of polygonal MnCo2O4 spinel fabricated using guava leaf extract as green fuel

Abstract

This work reports green synthesis of heterometalic MnCo2O4 nano-cobaltite using Psidium guajava leaf extract as chelating agent as well as reducing agent. An eco-friendly pathway is adopted for microstructural, optical and effluent degradation properties of the synthesized nano-polygonal material. Microstructural and optical characterization of the prepared material was done using X-Ray Diffractometer, FESEM and UV–Vis spectroscopy. XRD pattern confirms successful formation of the phase pure sample and Rietveld analysis of the XRD gives different microstructural parameters (lattice parameter, crystallite size and microstrain). FESEM micrograph shows polygonal morphology of the nano-particles and UV–Vis spectra analysis confirms its band gap value within the semiconducting range. To examine the photocatalytic degradation capability of the prepared bio-sample, fabricated nano-material is used as catalyst for degradation of model organic pollutant Rhodamine B. Fabricated MnCo2O4 bio-sample shows excellent catalytic efficiency of ∼ 85.83% for solution of Rhodamine B pollutant in 140 min under visible light irradiation. This non-toxic, eco-friendly green approach to fabricating MnCo2O4 has potential application and effectiveness as suitable catalyst in organic effluent degradation released from textile industries.