Dismutation of Titanium Sub‐oxide into TiO and TiO2 with Structural Hierarchy Assisted by Ammonium Halides. Issue 45 (10th July 2019)

• Record Type: Journal Article
• Authors: Huang, Jiantao; Xu, Jijian; Che, Xiangli; Huang, Chong
• Is Part Of: Chemistry. Volume 25:Issue 45(2019)
• Page Start: 10642
• Page End: 10649
• Publication Date: 2019-07-10
• Subjects: ammonium halide -- black TiO2−x -- conductive TiO -- disproportionation reaction -- titanium sub-oxides; Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201901057
• Languages: English
• ISSNs: 0947-6539

Abstract

Abstract: Black TiO2− x attracts enormous attention due to its large solar absorption and improved conductivity. In this work, a novel structure of TiO2− x with conductive TiO layer, performing full‐spectrum absorption, was synthesized in one step by the unforeseen dismutation reaction of titanium sub‐oxides (Ti n O2 n −1 ) in ammonium halide atmosphere. For this new reaction, a possible mechanism of decomposition‐etching‐disproportionation‐rehydrolysis process was proposed. The vital intermediate reactant TiCl4, which verifies the assumption, has been captured in the form of (NH4 )2 TiCl6, especially where Ti2 O3 is the reactant. Furthermore, this work not only can nominate TiO as an alternative for noble metals or carbon materials in the aim to improve the electron conductivity and solar absorption of black TiO2− x, which are important in electrochemistry and optoelectronics fields, but also can be a new route to synthesize special structures for other multivalent transition metals. Abstract : Clash of titanium oxide : A novel composite structure of TiO2− x with conductive TiO layer is synthesized in one step by an unforeseen dismutation reaction and performs full‐spectrum absorption.