Aqueous Crystallization Strategy for Metastable h ‐MoO 3 Crystals with Polyvinylpyrrolidone Induction

作者：Jingnan Guo, Yan Zhao, Jingzhe Zhao, Jiajing Wu, Yuehong Song, Yixin Tan, Fangping Wang, Xinli Hao, Yan Lu, Fengxia Bao · 发表于：European Journal of Inorganic Chemistry · 年份：2014 · DOI：10.1002/ejic.201402110 · 被引用次数：15 · 研究领域：Transition Metal Oxide Nanomaterials、Advanced Photocatalysis Techniques、Polyoxometalates: Synthesis and Applications

Abstract Micro‐sized hexagonal‐phase MoO 3 ( h ‐MoO 3 ) crystals were successfully prepared by a polyvinylpyrrolidone (PVP) induced aqueous route with (NH 4 ) 6 Mo 7 O 24 · 4H 2 O and HCl as raw materials. The linear structure of the PVP molecules matches the tunnel structure of the metastable h ‐MoO 3 crystals and, thus, enables the induced crystallization in an aqueous solution even at near‐ambient temperatures (40–50 °C). The achieved h ‐MoO 3 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 ‐MoO 3 crystals. The photochromic properties of PVP‐dependent samples of h ‐MoO 3 crystals were studied under natural sunlight irradiation.