铝热还原法制备Magnéli相亚氧化钛及其可见光光催化活性研究  

A Novel Route for Preparation of Magnéli Titanium Suboxides by Aluminothermic Reduction and Their Photocatalytic Activity Under Visible Light

作　　者：李军[1] 吴恩辉[1] 侯静[1] 黄平[1] 蒋燕 徐众[1] 刘黔蜀[1] Li Jun;Wu Enhui;Hou Jing;Huang Ping;Jiang Yan;Xu Zhong;Liu Qianshu(International Research Institute of Vanadium and Titanium,Panzhihua University,Panzhihua 617000,China)

机构地区：[1]攀枝花学院攀枝花国际钒钛研究院,四川攀枝花617000

出　　处：《稀有金属材料与工程》2020年第7期2281-2288,共8页Rare Metal Materials and Engineering

基　　金：Science and Technology Support Program of Sichuan(2017JY0117);Applied Technology Research and Development Fund of Panzhihua City(2017CY-G-15)。

摘　　要：采用铝热还原-盐酸酸洗工艺成功制备了Magnéli相亚氧化钛,通过XRD,SEM,UV-Vis DRS和XPS等手段进行表征。结果表明:在焙烧温度950℃,焙烧时间20 min,Al/TiO2=0.2时,成功制备以Ti4O7为主要物相的Magnéli相亚氧化钛材料,其粒径为400~600 nm,样品表面形成了大量的氧空位,表现出很强的紫外和可见光吸收性能。在可见光条件下光照130 min时,950℃焙烧20、25和35 min条件下制备并酸洗后的Magnéli相亚氧化钛降解亚甲基蓝的效率分别达到37%、43%和62%。Magnéli-phases titanium suboxides were prepared by an aluminum reduction-hydrochloric acid leaching route.The resulting sample was characterized by X-ray diffraction(XRD),scanning electron microscopy(SEM),UV-visible diffuse reflectance spectroscopy(UV-Vis DRS)and X-ray photoelectron spectroscopy(XPS).The results show that Magnéli phase titanium suboxide with Ti4O7 as the mother phase could be prepared with the calcination temperature of 950℃,roasting time of 20 min and the amount of aluminum 0.2.The as-prepared Magnéli-phase titanium suboxides samples with the diameters of 400~600 nm.The surface of Magnéli-phase titanium suboxides forms of oxygen vacancies,and thus the sample shows strong UV and visible-light absorption property.The degradation efficiency of 37%,43%,and 62%is achieved for the as-prepared Magnéli-phase titanium suboxides samples with 950℃calcination for 20,25 and 35 min,respectively,after visible light irradiation for 130 min.

关 键 词：铝热还原 Magnéli相 光催化降解 

分 类 号：O643.36[理学—物理化学] O644.1[理学—化学]