Enhanced reactivity of peroxo-modified surface of titanium dioxide nanoparticles used to synthesize ultrafine bismuth titanate powders at lower temperatures

Author(s)

Francatto, P. ; Souza Neto, F. N. ; Nogueira, A. E. ; Kubo, A. M. ; Ribeiro, L. S. ; Goncalves, L. P. ; Gorup, L. F. ; Leite, E. R. ; Camargo, E. R.

• Document type: Journal article
• Source: CERAMICS INTERNATIONAL; v. 42, n. 14, p. 15767-15772, NOV 1 2016.
• Web of Science Citations: 5

Abstract

Bismuth titanate with sillenite structure (Bi12TiO20) was prepared at lower temperatures and shorter times using a modified oxidant peroxide method (OPM). Bi12TiO20 was synthesized utilizing commercial Bi2O3 and reactive titanium dioxide nanoparticles having peroxo-modified surfaces. Rather than depending on particle size, the reaction mechanism is related to the highly exothermic decomposition of peroxo groups, regardless the titanium source used, which locally releases a large amount of energy that can accelerate the reaction, similar to self-propagating high temperature routes (SHS). (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved. (AU)

• FAPESP's process: 14/09014-7 - Study of the potential of NANO-HETEROSTRUCTURE of copper and niobium oxide for use in artificial photosynthesis
• Grantee: André Esteves Nogueira
• Support type: Scholarships in Brazil - Post-Doctorate
• FAPESP's process: 13/07296-2 - CDMF - Center for the Development of Functional Materials
• Grantee: Elson Longo da Silva
• Support type: Research Grants - Research, Innovation and Dissemination Centers - RIDC