摘要
Ag PO was deposited on TiO by in-situ precipitation to fabricate Ag PO –TiO heterojunction with different ratios of Ag PO . The electronic band structures of TiO and Ag PO were determined by means of ultraviolet photoelectron spectroscopy and UV–visible spectrometry. The Fermi levels of TiO and Ag PO were calculated to be −5.09 eV and −5.95 eV, respectively, and accordingly the energy band diagrams were constructed. The hydrogen production rates of bare TiO and Ag PO –TiO heterojunctions were measured under 300 W Xe lamp with a solar filter (AM 1.5). The heterojunction formed with 12 wt% Ag PO showed the highest hydrogen evolution rate (44.5 μmol g h ) which is 5.7 times higher than that of TiO . When Au nanoparticles were deposited on this heterojunction, it resulted in 10.2 times (453.0 μmol g h ) further improvement of hydrogen generation. The hydrogen evolution performance is consistent with the result of photoluminescence analysis.