Abstract

The size controlled 2D hexagonal structured Co₃O₄ with exposure of {111} plane was fabricated, and the catalytic properties for photooxidation of organics using as-prepared samples were investigated. 2D hexagonal structured Co₃O₄ with the size of 3 μm displays the higher photocatalytic activity than 200 nm size for the photooxidation of IPA and cyclohexanol, both of which are higher than bulk Co₃O₄, suggesting that more exposure of {111} planes provides Co₃O₄ with greatly enhanced photocatalytic activity.

Keywords: Photocatalysis, Co₃O₄, Two-dimension, Crystal plane, Photooxidation.