Abstract
Zinc phosphate hydrate Zn3(PO4)2·4H2O thin films were deposited making use of chronoamperometric mode, on three types of substrates: fluorine-doped tin oxide (FTO) on glass, stainless steel, and titanium. The precursors were solutions in aqueous medium of Zn(NO3)2·6H2O and NH4H2PO4. The effects of various parameters (concentrations of starting precursors, nature of substrates) on the properties of electrodeposited films were analyzed. The films were characterized by X-ray diffraction, scanning electron microscopy, Raman spectroscopy, and electrochemical cyclic voltammetry. The material Zn3(PO4)2·4H2O, electrodeposited on the three different substrates to form three types of anodes, crystallized in the orthorhombic structure of hopeite β. The first determinations of the electrocatalytic degradation of rhodamine B (RhB) were performed using the three types of anodes. The RhB degradation was followed by UV–Visible spectrophotometry and also by chemical oxygen demand: it was found that the best degradation was obtained on FTO substrate.
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