title: Ultrasonic-assisted preparation of metastable hexagonal MoO3 nanorods and their transformation to microbelts.
abstract: Metastable hexagonal h-MoO(3) nanorods were synthesized by a simple sonochemical method, and then were transformed into thermodynamically stable a-MoO(3) microbelts by calcination. The obtained samples were characterized by X-ray diffraction (XRD), differential thermal analysis (DTA), field-emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM). It was found that the as-prepared h-MoO(3) nanorods were of 0.2-1.2 μm in width and 1-6 μm in length. A possible formation and growth mechanism of hexagonal MoO(3) nanorods is proposed, in which ultrasound plays a crucial role and cannot be ignored. Moreover, the effect of temperature on the transformation process by calcination is investigated and a possible growth process of microbelts is also discussed.
authors.affiliation: Key Laboratory of Ministry of Education for Non-ferrous Materials Science and Engineering, School of Materials Science and Engineering, Central South University, Changsha 410083, China.
authors.forename: Zhuangzhi
authors.initials: Z
authors.lastname: Wu
authors.forename: Dezhi
authors.initials: D
authors.lastname: Wang
authors.forename: Xun
authors.initials: X
authors.lastname: Liang
authors.forename: Aokui
authors.initials: A
authors.lastname: Sun
mesh_terms: D008982:Molybdenum / Q000737:chemistry; D043942:Nanotubes / Q000737:chemistry*; D010087:Oxides / Q000138:chemical synthesis* / Q000737:chemistry; D010316:Particle Size; D013816:Thermodynamics; D014465:Ultrasonics
chemical_list: D010087:Oxides; C082290:molybdenum trioxide; D008982:Molybdenum