Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Effect of pH on the Formation of Amorphous TiO2 Complexes and TiO2 Anatase during Pyrolysis of TiCl4 Aqueous Solution

Version 1 : Received: 31 July 2020 / Approved: 2 August 2020 / Online: 2 August 2020 (15:11:36 CEST)
Version 2 : Received: 6 September 2020 / Approved: 7 September 2020 / Online: 7 September 2020 (04:04:35 CEST)

How to cite: Xuan Dung, M.; Mai Van, T.; Duong Ngoc, H. Effect of pH on the Formation of Amorphous TiO2 Complexes and TiO2 Anatase during Pyrolysis of TiCl4 Aqueous Solution. Preprints 2020, 2020080037 (doi: 10.20944/preprints202008.0037.v1). Xuan Dung, M.; Mai Van, T.; Duong Ngoc, H. Effect of pH on the Formation of Amorphous TiO2 Complexes and TiO2 Anatase during Pyrolysis of TiCl4 Aqueous Solution. Preprints 2020, 2020080037 (doi: 10.20944/preprints202008.0037.v1).

Abstract

The TiO2 nanostructures resulted by pyrolysis of TiCl4 at low temperature of 80 oC are found to be a mixture of amorphous TiO2 complexes and anatase nanostructure that depends on the pH of the pyrolysis medium. Anatase nanostructure is predominant at low pH level and gradually converts to amorphous TiO2 complexes with increasing pH level. By means of heat treatment, the TiO2 nanostructures can be recovered from amorphous TiO2 complexes. Amongst of the TiO2 nanostructure recovered from amorphous TiO2 complexes, the anatase nanostructure shows to be the strongest photocatalyst in decomposition of methylene blue.

Subject Areas

photocatalyst; amorphous TiO2 complexes; TiO2; anatase nanostructure

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