Aerosol-Assisted Chemical Vapour Deposition of Highly Efficient Mixed Anatase-Rutile TiO2 for Photoelectrochemical Water Splitting

Andrew Johnson; Thom Harris-Lee; Frank Marken; Jie Zhang; Cameron  Bentley; Enrico Della Gaspera

doi:10.1039/d3ma00364g

Aerosol-Assisted Chemical Vapour Deposition of Highly Efficient Mixed Anatase-Rutile TiO2 for Photoelectrochemical Water Splitting

Andrew Johnson
, Thom Harris-Lee
, Frank Marken
, Jie Zhang
, Cameron Bentley
, Enrico Della Gaspera

Monash University
RMIT University

Research output: Contribution to journal › Article › peer-review

7 Citations (SciVal)

Abstract

Aerosol-assisted chemical vapour deposition (AACVD) has been used in conjunction with new and bespoke precursors for the fabrication of highly nanostructured, mixed anatase-rutile phase TiO ₂. Precursor syntheses were carried out in two steps, reacting tetrakis(dimethylamino)titanium with a triethanolamine-based ligand complex, followed by reaction with the relevant dry solvent. Suitability for AACVD was assessed by thermogravimetric analysis, and the resulting TiO ₂ films were characterised by SEM, EDX, Raman, and PXRD, which was used to find relative ratios of anatase and rutile phase in the mixed-system, and respective grain sizes. The resulting TiO ₂ films show exceptional OH ⁻ oxidation performance under simulated solar irradiation, yielding photocurrent densities of 1.06 mA cm ⁻² at 1.23 V vs. RHE, and a peak incident photon conversion efficiency of 95.6% at 380 nm incident light, indicating their promise for use in photoanodes for water splitting application.

Original language	English
Pages (from-to)	3708-3713
Number of pages	6
Journal	Materials Advances
Volume	4
Issue number	17
Early online date	1 Aug 2023
DOIs	https://doi.org/10.1039/d3ma00364g
Publication status	Published - 1 Aug 2023

Bibliographical note

Publisher Copyright:
© 2023 RSC.

Funding

This work has been supported by the Institute for Sustainability, University of Bath, and Monash University, both of which are thanked for the provision of a joint Bath-Monash Global PhD studentship to T. R. H-L. C. L. B. is the recipient of an Australian Research Council (ARC) Discovery Early Career Researcher Award (DECRA, project number DE200101076), funded by the Australian Government. The authors acknowledge the use of the instruments and scientific and technical assistance at the Monash Centre for Electron Microscopy, a Node of Microscopy Australia. The authors gratefully acknowledge the Material and Chemical Characterisation Facility (MC) at the University of Bath, http://doi.org/10.15125/mx6j-3r54 , for technical support and assistance in this work. 2

Funders	Funder number
Australian Government
Australian Research Council	DE200101076
Monash University

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

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10.1039/d3ma00364gLicence: CC BY

Cite this

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abstract = "Aerosol-assisted chemical vapour deposition (AACVD) has been used in conjunction with new and bespoke precursors for the fabrication of highly nanostructured, mixed anatase-rutile phase TiO 2. Precursor syntheses were carried out in two steps, reacting tetrakis(dimethylamino)titanium with a triethanolamine-based ligand complex, followed by reaction with the relevant dry solvent. Suitability for AACVD was assessed by thermogravimetric analysis, and the resulting TiO 2 films were characterised by SEM, EDX, Raman, and PXRD, which was used to find relative ratios of anatase and rutile phase in the mixed-system, and respective grain sizes. The resulting TiO 2 films show exceptional OH − oxidation performance under simulated solar irradiation, yielding photocurrent densities of 1.06 mA cm −2 at 1.23 V vs. RHE, and a peak incident photon conversion efficiency of 95.6\% at 380 nm incident light, indicating their promise for use in photoanodes for water splitting application.",

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AU - Della Gaspera, Enrico

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AB - Aerosol-assisted chemical vapour deposition (AACVD) has been used in conjunction with new and bespoke precursors for the fabrication of highly nanostructured, mixed anatase-rutile phase TiO 2. Precursor syntheses were carried out in two steps, reacting tetrakis(dimethylamino)titanium with a triethanolamine-based ligand complex, followed by reaction with the relevant dry solvent. Suitability for AACVD was assessed by thermogravimetric analysis, and the resulting TiO 2 films were characterised by SEM, EDX, Raman, and PXRD, which was used to find relative ratios of anatase and rutile phase in the mixed-system, and respective grain sizes. The resulting TiO 2 films show exceptional OH − oxidation performance under simulated solar irradiation, yielding photocurrent densities of 1.06 mA cm −2 at 1.23 V vs. RHE, and a peak incident photon conversion efficiency of 95.6% at 380 nm incident light, indicating their promise for use in photoanodes for water splitting application.

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Aerosol-Assisted Chemical Vapour Deposition of Highly Efficient Mixed Anatase-Rutile TiO2 for Photoelectrochemical Water Splitting

Abstract

Bibliographical note

Funding

UN SDGs

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