Expanding the applications of the ilmenite mineral to the preparation of nanostructures: TiO2 nanorods and their photocatalytic properties in the degradation of oxalic acid.
Expanding the applications of the ilmenite mineral to the preparation of nanostructures: TiO2 nanorods and their photocatalytic properties in the degradation of oxalic acid.
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DOI：
10.1002/chem.201202451
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发表时间：
2013-01
期刊：
影响因子：
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通讯作者：
T. Tao;Y. Chen;Dan Zhou;Hongzhou Zhang;Sanly Liu;R. Amal;N. Sharma;A. Glushenkov
中科院分区：
文献类型：
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作者：
T. Tao;Y. Chen;Dan Zhou;Hongzhou Zhang;Sanly Liu;R. Amal;N. Sharma;A. Glushenkov
钛铁矿是地壳中储量最丰富的矿石之一，是工业生产块状氧化钛的主要来源。与此同时，将钛铁矿转化为纳米结构的二氧化钛(这是太阳能电池、电池和光催化剂等新的先进应用所必需的)还没有得到很大的探索。本文介绍了一种从球磨钛铁矿中制备金红石型二氧化钛纳米棒的简单有效的方法。这些纳米棒尺寸小(宽5-20 nm，长50-100 nm，厚2-5 nm)，具有大的比表面积(高达97m(2)g(-1))。提出了溶解/水解/沉淀作为一种生长机制。结果表明，纳米棒对草酸的降解具有良好的光催化性能。其光催化活性接近基准的Degussa P25材料，优于商业高比表面积金红石粉。
The mineral ilmenite is one of the most abundant ores in the Earth's crust and it is the main source for the industrial production of bulk titanium oxide. At the same time, methods to convert ilmenite into nanostructures of TiO(2) (which are required for new advanced applications, such as solar cells, batteries, and photocatalysts) have not been explored to any significant extent. Herein, we describe a simple and effective method for the preparation of rutile TiO(2) nanorods from ball-milled ilmenite. These nanorods have small dimensions (width: 5-20 nm, length: 50-100 nm, thickness: 2-5 nm) and possess large specific surface areas (up to 97 m(2) g(-1)). Dissolution/hydrolysis/precipitation is proposed as a growth mechanism. The nanorods were found to have attractive photocatalytic properties in the degradation of oxalic acid. Their photocatalytic activity is close to that of the benchmark Degussa P25 material and better than that of a commercial high-surface-area rutile powder.