Synthesis and photocatalytic activity of porous polycrystalline NiO nanowires

Porous polycrystalline NiO nanowires were prepared via thermal decomposition of the nickelous precursor synthesized via the hydrothermal reaction of nickel chloride with trisodium citrate dehydrate (C(6)H(5)Na(3)O(7)a <...2H(2)O) in ethanol-H(2)O binary solution. The porous polycrystalline nanowires with the diameters of 350 to 450 nm were constructed from NiO nanocrsystals with the cubic structure and the sizes of 8 to 12 nm. The photocatalytic activity of the as-prepared porous NiO nanowires for the degradation of acid scarlet dye was studied. It was found that their photocatalytic activity was stronger than that of NiO powders.