Issue 42, 2023

Phase transition behaviour and mechanism of 2D TiO2(B) nanosheets through water-mediated removal of surface ligands

Abstract

Phase engineering is a central subject in materials research. The recent research interest in the phase transition behavior of atomically thin 2D materials reveals the important role of their surface chemistry. In this study, we investigated the phase transformation of ultrathin TiO2(B) nanosheets to anatase under different conditions. We found that the convenient transformation in water under ambient conditions is driven by the hydrolysis of surface 1,2-ethylenedioxy groups and departure of ethylene glycol. A transformation pathway through the formation of protonic titanate is proposed. The ultrathin structure and the metastable nature of the precursor facilitate the phase conversion to anatase. Our finding offers a new insight into the mechanism of TiO2(B) phase transition from the viewpoint of surface chemistry and may contribute to the potential application of ultrathin TiO2(B) nanosheets in aqueous environments.

Graphical abstract: Phase transition behaviour and mechanism of 2D TiO2(B) nanosheets through water-mediated removal of surface ligands

Supplementary files

Article information

Article type
Paper
Submitted
23 Aug 2023
Accepted
07 Sep 2023
First published
21 Sep 2023
This article is Open Access
Creative Commons BY-NC license

Dalton Trans., 2023,52, 15590-15596

Phase transition behaviour and mechanism of 2D TiO2(B) nanosheets through water-mediated removal of surface ligands

S. Xie, L. Fan, Y. Chen, J. Cai, F. Wu, K. Cao and P. Liu, Dalton Trans., 2023, 52, 15590 DOI: 10.1039/D3DT02752J

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