Issue 11, 2017

Crystal phase- and morphology-controlled synthesis of MoO3 materials

Abstract

The crystal phase and morphology of MoO3 materials were precisely tuned under suitable synthetic conditions and mutual transformation of h-MoO3 and α-MoO3 was achieved via a facile hydrothermal method for the first time. The h-MoO3 microrods with a diameter of 0.5–1.6 μm and length of 2.2–6.1 μm were fabricated with the assistance of NaNO3 using α-MoO3 particles as the precursor. The transformation of h-MoO3 microrods to α-MoO3 nanobelts with a diameter of 150–430 nm and length of 2.1–14.5 μm occurred through hydrothermal techniques at higher temperature. Systematic studies of synthetic parameters revealed that the hexagonal h-MoO3 microrods formed at higher concentration of NaNO3, while h-MoO3 microrods vanished at higher temperature with prolonged time and α-MoO3 nanobelts were exclusively produced. The h-MoO3 microrods exhibited higher catalytic activity in photo-degradation of methylene blue than the α-MoO3 nanobelts. This is ascribed to the weaker fluorescence and reduced bandgap energy of the h-MoO3 microrods than those of the α-MoO3 nanobelts.

Graphical abstract: Crystal phase- and morphology-controlled synthesis of MoO3 materials

Article information

Article type
Paper
Submitted
23 Nov 2016
Accepted
13 Feb 2017
First published
13 Feb 2017

CrystEngComm, 2017,19, 1479-1485

Crystal phase- and morphology-controlled synthesis of MoO3 materials

Z. Li, J. Ma, B. Zhang, C. Song and D. Wang, CrystEngComm, 2017, 19, 1479 DOI: 10.1039/C6CE02437H

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