Abstract
Zinc chromite nanoparticles (NPs) and zinc chromite-reduced graphene oxide (ZnCr2O4-rGO) nanocomposite have been synthesized by the combined effects of reflux condensation and calcination processes. The structural properties were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR), UV-visible studies, etc. Structural morphology was investigated by field emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM) that indicate the formation of particles in the nanometer regime. The presence of the elements Zn, Cr, O and C has been confirmed by energy-dispersive X-ray spectroscopy (EDX) images which show the purity of the synthesized products. The photocatalytic activities of both as-prepared samples under visible light irradiation were investigated in presence of hydrogen peroxide (H2O2) and the results show that ZnCr2O4-rGO nanocomposite has a quite higher photo-activity response than virgin ZnCr2O4 NPs. The enhanced photo response indicates that, in ZnCr2O4, the photo-induced electrons favor to transfer to the rGO surface and the recombination of electron-hole pairs inhibited for which it results in the significantly increased photocatalytic activity for the ZnCr2O4-rGO photocatalyst and this phenomenon is also supported by theband gap value and photoluminescence results. Our outcomes demonstrate that ZnCr2O4-rGO nanocomposite is a more promising material to build up an efficient photocatalyst for waste water treatment.
Highlights
The heterogeneous photocatalyst gives great promise for environmental contaminants elimination by transfer photon energy into chemical energy (Nguyen et al 2016; Kalisamy et al 2020)
Structural morphology was investigated by field emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM) that indicates the formation of particles in nanometre regime
X-ray diffraction (XRD) patterns were collected to know the crystallographic structure of the synthesized samples ZnCr2O4 NPs and ZnCr2O4-reduced graphene oxide (rGO) nanocomposite presented in the Fig. 1a
Summary
The heterogeneous photocatalyst gives great promise for environmental contaminants elimination by transfer photon energy into chemical energy (Nguyen et al 2016; Kalisamy et al 2020). The photocatalytic treatment for eradication of hazardous environmental pollutants, such as, various organic dyes, chemical compounds etc. Is one of the most efficient and economical concerns These pollutants egress from industries like textile, paper, food, cosmetic, pharmaceutical industries and contaminate water (Dong et al 2015; Shang et al 2014). Removal of these pollutants from water is very important for living beings. There are very few spinal nanocomposites reported for the removal of organic dyes from contaminant water
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