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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| Authors: | Dr Tao Tao Prof Ying Chen Dan Zhou Dr Hongzhou Zhang Dr Sanly Liu Prof Rose Amal Dr Neeraj Sharma Dr Alexey M Glushenkov |
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| Institution: | 1. Institute for Frontier Materials, Deakin University, Waurn Ponds, VIC 3216 (Australia), Fax: (+61)?3‐52271103;2. School of Physics and Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin, Dublin?2 (Republic of Ireland);3. School of Chemical Engineering, ARC Centre of Excellence for Functional Nanomaterials, The University of New South Wales, Sydney, NSW 2052 (Australia);4. Australian Nuclear Science and Technology Organisation, Locked Bag 2001, Kirrawee DC NSW 2232 (Australia) |
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| Abstract: | 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 TiO2 (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 TiO2 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 m2 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. |
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| Keywords: | ball milling ilmenite nanostructures photocatalysis photochemistry rutile titanium |
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