Abstract
Large-scale β-Co(OH) 2 hexagonal nano-platelets have been synthesized successfully at 70 °C using only CoCl 2 and NaOH as reactants. The physicochemical features of the β-Co(OH) 2 hexagonal nano-platelets were characterized by X-ray diffraction (XRD), thermal gravimetric analysis (TGA), scanning electron microscopy (SEM) and nitrogen absorption–desorption. Results showed that the β-Co(OH) 2 obtained consisted of thin, regular, hexagonal nano-platelets with diameters and thicknesses of 50–300 nm and 30–80 nm, respectively. A transformation from β-Co(OH) 2 to Co 3O 4 was observed in the temperature range 160–220 °C. The average pore-size and the Brunauer–Emmet–Teller (BET) surface area of the synthesized β-Co(OH) 2 were 16.76 nm and 29.45 m 2/g. The prepared product had a significant effect on the catalytic decomposition of ozone.
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