Synthesis and characterization of hexagonal and truncated hexagonal shaped MoO3 nanoplates

Hexagonal and truncated hexagonal shaped MoO₃ nanoplates (MoO₃ HNP) were synthesized through a simple vapor-deposition method in Ar atmosphere under ambient pressure without the assistant of any catalysts. The structure and morphology of MoO₃ HNP were investigated by XRD, EDX, SEM, TEM, and HRTEM. The results reveal that the HNP are α-MoO₃ and have a large area surface. The Raman spectrum shows a significant size effect on the vibrational property of MoO₃ HNP. The photoluminescence (PL) spectrum was carried out, and two peaks at 351 and 410 nm were observed in the spectrum. In addition, a possible growth mechanism proposed as VS is discussed in detail.<br />