响应面法优化Fe/TiO_(2)纳米管阵列的制备及其光催化性能研究  

Optimization of the photocatalytic performance for theFe/TiO_(2) nanotube arrays by response surface methodology

作　　者：吴智君 罗洁[1] 欧安琪 刘玉琪 刘佳伟 吴博宁 WU Zhijun;LUO Jie;OU Anqi;LIU Yuqi;LIU Jiawei;WU Boning(School of Material and Science,Central South University of Forestry and Technology,Changsha 410004,China)

机构地区：[1]中南林业科技大学材料科学与工程学院,长沙410004

出　　处：《功能材料》2021年第8期8199-8205,共7页Journal of Functional Materials

基　　金：国家重点研发计划资助项目(2019YFB1503805);湖南省自然科学基金项目资助(2019JJ40535);国家级大学生创新训练计划资助项目(201810538009)。

摘　　要：以钛片为基底、硝酸铁为铁源,采用阳极氧化法和常压热水自组装法制备铁掺杂改性的TiO_(2)纳米管阵列(TNTs)。以可见光下甲基橙(MO)的降解率为评价指标,考察了不同因素对MO降解率的影响,并采用响应面法优化了工艺条件,进一步通过扫描电子显微镜(SEM)、X射线衍射(XRD)、X射线能谱(EDS)等测试手段对催化剂进行了分析表征。结果表明:当工艺条件为Fe(NO_(3))_(3)浓度0.30 mol/L、反应温度75℃、反应时间8.42 h时,Fe/TNTs的光催化性能最佳,MO的降解率可达95.96%,与预测结果96.04%相符,较掺杂前提高了61.81%。所制备的Fe/TNTs为锐钛矿晶型,铁的掺杂并未破坏其有序的管状阵列结构,光响应范围拓展到了可见光区域。The iron-doped TiO_(2)nanotube arrays(TNTs)are prepared by anodizing and atmospheric hot water self-assembly methods with titania as the substrate and Fe(NO_(3))_(3)as the iron source.The degradation rate of methyl orange(MO)is used as an evaluation index to investigate the influence of different factors on the degradation rate of MO under the visible light.The preparation conditions are optimized by response surface methodology,and the scanning electron microscope(SEM)and X-ray diffraction(XRD),X-ray energy spectroscopy(EDS)and other test methods are used to characterize the as-prepared catalysts.The results show that the photocatalytic performance of Fe/TNTs is the best and the degradation rate of MO can reach 95.96%when the process conditions are Fe(NO_(3))_(3)concentration 0.30 mol/L,reaction temperature 75℃,reaction time 8.42 h,The results are in accordance with the prediction of 96.04%which is 61.81%higher than that before doping.The as-prepared Fe/TNTs are anatase crystals,the doping of iron does not destroy their ordered tubular array structure,and the light response range extends to the visible light region.

关 键 词：TiO_(2)纳米管阵列 光催化 低温结晶 响应面法 

分 类 号：O644.1[理学—物理化学] X703.5[理学—化学]