高分子网络凝胶法制备Fe、Ce掺杂TiO_(2)粉体的组织结构和光学性能研究  

Microstructure and optical properties of Fe and Ce doped TiO_(2) powders prepared by polymer network gel method

作　　者：张蓉蓉 杜景红[1] 张艺杰 胡蓉 秦朝乾 Zhang Rongrong;Du Jinghong;Zhang Yijie;Hu Rong;Qin Chaoqian(Faculty of Materials Science and Engineering,Kunming University of Science and Technology,Kunming 650093)

机构地区：[1]昆明理工大学材料科学与工程学院,昆明650093

出　　处：《化工新型材料》2023年第6期109-113,共5页New Chemical Materials

基　　金：昆明理工大学校企合作基金项目(2021KF180)。

摘　　要：采用高分子网络凝胶法制备了Fe、Ce单掺和共掺TiO_(2)粉体,采用热重(TG-DTA)、X射线衍射(XRD)、扫描电镜(SEM)、紫外-可见光(UV-Vis)对粉体的热效应、晶体结构、吸收光谱进行了研究。结果表明:与纯TiO_(2)相比,无论单掺还是共掺,TG变化基本上是一致的,但是掺杂后明显提高了锐钛矿相向金红石相的转变温度。Fe、Ce离子的掺杂并未改变TiO_(2)的物相组成,Ce离子的掺杂会抑制锐钛矿向金红石的转变而Fe离子会促进转变进行。Fe、Ce单掺与共掺TiO_(2),形貌无明显变化,掺杂后都可以细化TiO_(2)晶粒,从而增大粉体的比表面积。共掺比单掺可见光吸收性能要好,当掺杂量为1.0%Fe-0.5%Ce时,样品光吸收带边红移最明显,达到556.8nm。Fe and Ce single doped and co-doped TiO_(2) powders were prepared by polymer network gel method.The thermal effects,crystal structure and absorption spectra of the powders were studied by TG-DTA,XRD,SEM and UV-Vis.The results showed that compared with pure TiO_(2),the change of TG was basically the same regardless of single doping or co-doping,but the doping significantly improved the transition temperature from anatase phase to rutile phase.The doping of Fe and Ce ions didn't not change the phase composition of TiO_(2).The doping of Ce ions inhibited the transformation from anatase to rutile,while Fe ions promoted the transformation.The morphology of Fe and Ce doped and Co-doped TiO_(2) had no obvious change.After doping,the TiO_(2) grains were refined,thereby increasing the specific surface area of the powder.Co-doping had better visible light absorption performance than single doping,and when the doping amount was 1.0%mol Fe-0.5%mol Ce,the red shift of the light absorption band edge of the sample was the most obvious,reaching 556.8nm.

关 键 词：FE掺杂 CE掺杂 二氧化钛粉体 高分子网络凝胶法 

分 类 号：O614.411[理学—无机化学]