Facile synthesis of FeO/CuO a core-shell heterostructure for the enhancement of photocatalytic activity under visible light irradiation.

A magnetically separable FeO/CuO core-shell heterostructure photocatalyst was synthesized by hydrothermal method. The obtained photocatalyst was characterized by Fourier-transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscope (FE-SEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), and UV-visible diffuse reflectance (UV-DRS). The obtained photocatalyst was used for the degradation of azo dye Direct Red 89 (DR89), under visible light irradiation provided by fluorescent lamp of 100 W in the presence of 7 mL of HO (30%); the results of the photocatalytic activity for FeO/CuO photocatalyst showed that in the presence of 0.

Azo dye removal by acid pretreated biomass and its regeneration by visible light photocatalysis with incorporated CuO.

In this work, we synthesized self-regenerative biosorbent BM-HPO-(CuO) by combining the photocatalyst CuO and acid pre-treated biomass (BM-HPO), the hybrid material BM-HPO-(CuO) was used for the removal of azo dye Direct Red 89 (DR-89). The morphology, texture phase, composition of the samples was characterized with scanning electron microscopy (SEM), Fourier transform infrared spectroscopy, elemental diffraction analysis X-ray (EDAX). That confirms the presence of CuO into the pretreated biomass BM-HPO The results reveal that when the biomass was loaded with a proper CuO/BM-HPO weight ratio of 60%, the biosorption capacity was enhanced to 5.

Eco-friendly synthesis of self-regenerative low-cost biosorbent by the incorporation of CuO: a photocatalyst sensitive to visible light irradiation for azo dye removal.

Acid pretreated biomass Lemna minor (BM-HPO) was used as support for CuO nanoparticles loading, to investigate the dye biosorption capacity and the photocatalytic performance under artificial visible light. The surface morphology, crystal structure, elemental composition, and the bandgap of modified biomass have been determined using FE-SEM, XRD, EDX, XPS, FTIR, and UV-DR analysis. The results showed that NH and P-O functional groups of (BM-HPO) can attract the copper ions (Cu), which can facilitate the loading of CuO nanoparticles hence, smaller nanoparticles with an average diameter of 21 nm was obtained.