One-pot Synthesis and Formation Mechanism of Prisms-built VO2(M) with Hypersensitive Phase-transition Hysteresis  

作　　者：LI Xiong-Jian YANG Shui-Jin 李雄建;杨水金(Hubei Key Laboratory of Pollutant Analysis&Reuse Technology,College of Chemistry and Chemical Engineering,Hubei Normal University,Huangshi 435002,China)

机构地区：[1]Hubei Key Laboratory of Pollutant Analysis&Reuse Technology,College of Chemistry and Chemical Engineering,Hubei Normal University,Huangshi 435002,China

出　　处：《Chinese Journal of Structural Chemistry》2021年第8期999-1004,968,共7页结构化学（英文）

基　　金：supported by the Hubei Provincial Department of Education(B2020129);Scientific Research Foundation(HS2020RC021)。

摘　　要：Prisms-built VO_(2)(M)micro-nanostructures with narrow hysteresis width of 2.7℃were successfully synthesized using V_(2)O_(5)-H_(2)C_(2)O_(4)-H2O system by one-pot hydrothermal approach.The structure,composition,phase transition and optical properties were characterized by XRD,SEM,DSC,and variable-temperature UV-vis.The results revealed the prism had well-defined six facets and entire smooth surface with lengths of about 500 nm and thicknesses of around 100 nm.Several prisms were connected to each other through the apical growth.The prismatic VO_(2)(M)showed excellent phase transition and optical switching properties that would be beneficial for highly sensitive electrical/optical devices or other applications.The possible formation mechanism of prismatic VO_(2)(M)was proposed via time-dependent SEM images and XRD patterns.Furthermore,the influence of the amount of H_(2)O on the final product was discussed in detail.

关 键 词：VO_(2)(M) optical properties hysteresis width one-pot synthesis 

分 类 号：TQ135.11[化学工程—无机化工]