Fig. 1
Morphology and conductivity characterizations. a Cross-section SEM image, scan bar: 1 μm. b Top view SEM images of as-prepared BiVO4 photoanode and (c) the top view SEM image of BP/BiVO4 photoanode, scan bar: 500 nm. d TEM image of BP/BiVO4 photoanode, scan bar: 100 nm, insert is electron diffraction spot. e HAADF-STEM-EDX element mapping and f HR-TEM image of BP/BiVO4 heterojunction, scan bar: 5 nm. g Mott-Schottky plots of BP and BiVO4 electrodes measured with a frequency of 500 Hz and amplitude of 10 mV in KPi electrolyte (pH = 7.1)
