Synthesis and characterization of two PbO-chromium oxides

PbCrO4 and Pb2CrO5 have been selectively synthesized via a chemical gas–liquid precipitation process by adjusting the pH value. The structure, size and morphology of the as-synthesized products are characterized by X-ray diffraction and transmission electron microscopy. Differences in UV–Vis spectra are related to differences in size and morphology.