Aqueous Crystallization Strategy for Metastable h-MoO3 Crystals with Polyvinylpyrrolidone Induction

作者：Guo, Jingnan; Zhao, Yan; Zhao, Jingzhe^*; Wu, Jiajing; Song, Yuehong; Tan, Yixin; Wang, Fangping; Hao, Xinli; Lu, Yan; Bao, Fengxia

来源：European Journal of Inorganic Chemistry, 2014, 2014(21): 3322-3329.

DOI：10.1002/ejic.201402110

• Molybdenum
• Metastable compounds
• Photochromism
• Crystal growth

Micro-sized hexagonal-phase MoO3 (h-MoO3) crystals were successfully prepared by a polyvinylpyrrolidone (PVP) induced aqueous route with (NH4)(6)Mo7O24 center dot 4H(2)O and HCl as raw materials. The linear structure of the PVP molecules matches the tunnel structure of the metastable h-MoO3 crystals and, thus, enables the induced crystallization in an aqueous solution even at near-ambient temperatures (40-50 degrees C). The achieved h-MoO3 crystals have good monodispersity with a one-dimensional (1D) outline and hexagonal cross-section. The H+/Mo ratio is another key factor for the synthesis of h-MoO3 crystals. The photochromic properties of PVP-dependent samples of h-MoO3 crystals were studied under natural sunlight irradiation.

• 出版日期2014-7
• 单位湖南大学