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热处理温度对Ce掺杂TiO_2光催化剂结构与性能的影响 被引量:3

Annealing temperature on the influence of the structure and photocatalytic performance of Ce Doped TiO_2
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摘要 以钛酸丁酯为钛源,采用溶胶-凝胶法制备了不同热处理温度的Ce掺杂TiO2纳米粉体。通过X射线衍射(XRD)、场发射扫描电子显微镜(FE-SEM)、N2吸附-脱附(BET)、透射电子显微镜(TEM)等对产物进行了表征.以罗丹明B(Rh B)为降解物,在紫外光照射下研究了不同热处理温度下样品的光催化性能.研究结果表明,在一定温度下,Ce的掺杂抑制了TiO2锐钛矿向金红石相的转变,增大了比表面积和孔体积,掺杂后TiO2的光催化活性优于商业TiO2(P25),且当Ce的最佳热处理温度为650℃时,以Rh B为降解物,经过180min光催化,降解率达到95%. TiO2 nanoparticles doped with varying annealing temperature was prepared by a sol‐gel method using Ti(OC4 H9 )4 as titanium source .The synthesis of Ce/TiO2 powders were confirmed by X‐ray diffraction (XRD )、Field‐emission scanning electron microscopy (FE‐SEM )、N2 adsorption‐desorption isotherm (BET ) and transmission electron microscopy (TEM ) .The photocatalytic activity of Ce‐doped TiO2 microspheres was investigated at dif‐ferent annealing temperatures by measuring the degradation rate of Rhodamine B (Rh B) un‐der ultraviolet light irradiation .The results showed that the doping of Ce greatly inhibited the transform from anatase to rutile under a certain temperature .The specific surface areas and micropore volume of the samples increased .All the Ce‐doped TiO2 microsphere samples showed higher photocatalytic activity than that of the commercial TiO2 (P25) .The optimum reaction temperature is 650 ℃ and the degradation rate for Rh B reaches 95% after 180 min .
出处 《陕西科技大学学报(自然科学版)》 2015年第5期46-49,75,共5页 Journal of Shaanxi University of Science & Technology
基金 陕西省科技厅科技攻关计划项目(2014K08-12) 陕西省教育厅重点实验室科研计划项目(14JS015) 陕西科技大学研究生创新基金项目
关键词 纳米粉体TiO2 溶胶-凝胶法 CE掺杂 光催化降解 TiO2 sol-gel Ce-doped photocatalytic degradation
作者简介 樊国栋(1964-),男,山西永济人,教授,博士,研究方向:光降解催化
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