Crystal phase- and morphology-controlled synthesis of MoO3 materials. Issue 11 (21st February 2017)

• Record Type: Journal Article
• Authors: Li, Zhongcheng; Ma, Jiaojiao; Zhang, Bo; Song, Caixia; Wang, Debao
• Is Part Of: CrystEngComm. Volume 19:Issue 11(2017)
• Page Start: 1479
• Page End: 1485
• Publication Date: 2017-02-21
• Subjects: Crystals -- Periodicals; Crystal growth -- Periodicals; Crystallography -- Periodicals; Cristaux -- Périodiques; Cristaux -- Croissance -- Périodiques; Cristallographie -- Périodiques; 548
• DOI: 10.1039/c6ce02437h
• Languages: English
• ISSNs: 1466-8033

Abstract

Abstract : Mutual transformation of h-MoO3 and α-MoO3 was achieved via a facile hydrothermal method and the crystal phase and morphology of the MoO3 materials were precisely tuned under suitable synthetic conditions. 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.