fig1

Figure 1. (A) Schematic diagram of the synthesis route of the xAu/BiVO₄ heterojunction; (B-D) SEM images of the xAu/BiVO₄ heterostructures (x = 1, 3, 5); (E and F) HRTEM images of 3Au/BiVO₄; (G) EDS elemental mapping images of the 3Au/BiVO₄ heterostructures. The scales in Figure 1G all represent 1 um. BiVO₄: Bismuth vanadate; SEM: scanning electron microscope; HRTEM: high-resolution transmission electron microscopy; EDS: energy-dispersive X-ray spectroscopy.