Self-assembled synthesis of TiO2/TiB2 nanowall and its photocatalytic properties

The products are dominated by a kind of core/shell samples with nanowall structure when ethylenediamine (EDA) was added to the solution. The high-density nanosheets with about 10 nm in thickness stand on the cores. After annealing at 400 °C for 3 h, the nanosheets evolve to numerous nanoparticles. One possible explanation is that EDA takes part in the reaction and induces the growth of nanowall. Photocatalytic activity experiment indicates that nanowall samples have better decolorization rate than commercial P-25 TiO2.