Photocatalytic hydrogen production from aqueous methanol solution with CuO/Al_2O_3/TiO_2 nanocomposite

摘要

The photocatalytic hydrogen production from aqueous methanol solution was investigated with ZnO/TiO_2, SnO/TiO_2, CuO/TiO_2, Al_2O_3/TiO_2 and CuO/Al_2O_3/TiO_2 nanocomposites. A mechanical mixing method, followed by the solid-state reaction at elevated temperature, was used for the preparation of nanocomposite photocatalyst. Among these nanocomposite photocatalysts, the maximal photocatalytic hydrogen production was observed with CuO/Al_2O_3/TiO_2 nanocomposites. A variety of components of CuO/Al_2O_3/TiO_2 photo-catalysts were tested for the enhancement of H_2 formation. The optimal component was 0.2 wt% CuO/0.3 wt% Al_2O_3/TiO_2. The activity exhibited approximately tenfold enhancement at the optimum loading, compared with that with pure P-25 TiO_2. Nano-sized TiO_2 photocatalytic hydrogen technology has great potential for low-cost, environmentally friendly solar-hydrogen production to support the future hydrogen economy.