Fig. 1: Crystal structures of BiVO4 with various phases. | NPG Asia Materials

Fig. 1: Crystal structures of BiVO4 with various phases.

From: Unravelling a new many-body large-hole polaron in a transition metal oxide that promotes high photocatalytic activity

Fig. 1

RSMs of BiVO4 with increasing W doping, where (a), (b), (c), (d) and (e) correspond to pure, 0.5%, 1%, 2% and 5% W-doped BiVO4. The white diagonal thin lines show the in-plane symmetry of the ab lattice. f Doping dependence of lattice constants. For the tetragonal phase, the ab lattice constants should be the same. g–i Schematically represent how the phases change with increasing W doping. For a pure BiVO4 film, a twin domain with a⊥b is formed under strain due to the substrate, and it shows an orthorhombic phase; when a small amount of W is introduced, lattice a is no longer perpendicular to lattice b in the twin domain, and the phase changes to monoclinic. However, when the W doping is increased further, a tetragonal phase of BiVO4 can be obtained.

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