水热法制备Mo掺杂WO_3纳米材料及其光致变色性质的研究

Hydrothermal Synthesis and Photochromic Characterization of Mo Doped WO_3 Nanomaterial

WO3是一种多功能半导体材料,光致变色是其重要性质之一。利用单质W和Mo与双氧水之间的反应,加入Na2SO4作为矿化剂,通过水热合成制备出具有新颖结构的六方相Mo掺杂WO3纳米材料。应用SEM,XRD,HRTEM,XPS等检测手段分别对掺杂纳米材料的形貌和尺寸、物相、掺杂成分等进行研究,证明了产物为纯六方相的MoxW1-xO3,并确认了掺杂的成功。通过与纯WO3纳米线对比,所制备的MoxW1-xO3材料所具有的由掺杂导致的带隙改变及其独特的复合纳米结构,都有利于提高电子传递效率,从而使光致变色性能明显提高。

WO3 is a multi-functional semiconductor,and photochromism is one of the most important characterizations WO3 owns.This work has established a facile method to synthesize Mo doped hexagonal WO3 using W powder,Mo powder and hydrogen peroxide as starting agents and adding Na2SO4 as a mineralizer.The morphology,size,phase structure and component were characterized by applying SEM,XRD,HRTEM,XPS,etc,and it is confirmed that Mo is successfully doped into WO3 as MoxW1-xO3.After irradiated with Xe lamp,the novel MoxW1-xO3 material holds much better photochromic phenomenon than pure WO3.The involved smaller band gap resulted in the more electron produce after irradiation.Moreover,by doping Mo,the electron transfer in this special structure is highly enhanced.