A magnetically separable ZnFe2O4-reduced graphene oxide (rGO) nano-composite was synthesised via a microwave method. Field emission scanning electron microscopy images of the nano-composite showed a uniform dispersion of nanoparticles on the rGO sheets. The performance of the nano-composite in wastewater treatment was assessed by observing the decomposition of methylene blue. The nano-composite showed excellent bifunctionality, i.e. adsorption and photocatalytic degradation of methylene blue, for up to five cycles of water treatment when illuminated with light from a halogen bulb. In contrast, water treatment with the nano-composite without illumination and the illuminated rGO, with no decoration of nanoparticles, diminished significantly after the first treatment. The reclamation of the ZnFe2O4-rGO nano-composite from treated water could be easily achieved by applying an external magnetic field.

Available online xxxKeywords: AACVD Metal oxide Thin film Photoelectrochemical cells Water splittingHydrogen production a b s t r a c t Hydrogen energy has emerged as an alternative energy source. There are many processes for hydrogen production, which include both reforming and non-reforming hydrogen production. This paper reviews the benefits of photoelectrochemical (PEC) water splitting as a promising method for the production of hydrogen. Consequently, fabrication of efficient photoelectrode is crucial to achieve high performance cells. Aerosol-assisted chemical vapor deposition (AACVD) is discussed as a promising fabrication method for the materialization of thin films in terms of their homogeneity and uniformity. From this perspective, we discuss the AACVD process and the influence of the deposition parameters on PEC water splitting.

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