Synthesis and characterization of triangular-pyramidal bismuth oxide via a one-step chemical precipitation route

Abstract

Triangular-pyramidal ω-Bi₂O₃ is successfully synthesized via a one-step wet-chemical method. XRD, SEM, and UV-vis have been employed to characterize the as-prepared samples. Structural characterization by XRD confirms the formation of triclinic ω-Bi₂O₃ with high purity. The well-defined flower-like Bi₂O₃ structures consisted of many triangular-pyramids are formed. Preparative parameters, such as concentration of PEG 6000, have great effects on the morphology and the particle size. The obvious absorption edge for ω-Bi₂O₃ powder is located at about 493 nm, which corresponds to the optical band gap energy of 2.73 eV.

Keywords

one-step synthesis route / crystal structure / self-assembly

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