10.1007/s40097-014-0137-7

Synthesis of TiO2 nanopowders from red gypsum using EDTA as complexing agent

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  • M. Z. Borhan*1,
  • T. Y. Nee1,
  1. Environmental Research Technology Centre (ERTC), Shah Alam, Selangor Darul Ehsan, 40700, MY
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Published in Issue 10-12-2014

How to Cite

Borhan, M. Z., & Nee, T. Y. (2014). Synthesis of TiO2 nanopowders from red gypsum using EDTA as complexing agent. Journal of Nanostructure in Chemistry, 5(1 (March 2015). https://doi.org/10.1007/s40097-014-0137-7
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Abstract

Abstract TiO 2 white pigments were used in various applications due to their magnificent optical and electronic properties. In this paper TiO 2 was recovered from red gypsum which is a waste generated at TiO 2 production industry. The effect of time and temperature in sulphuric acid leaching processes was optimized. TiO 2 powders were synthesized through thermal precipitation process with the presence of ethylenediaminetetraacetic acid as a complexing and purification agent. The obtained powders were characterized by X-ray diffraction, transmission electron microscope, UV–Vis spectroscopy and inductively coupled plasma optical emission spectroscopy. Experimental results show that powders in anatase form have a 3.2 eV band gap with a crystallite size 30–50 nm.

Keywords

  • TiO2,
  • Gypsum,
  • Sulphate process,
  • EDTA
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