Aerosol-assisted chemical vapour deposition of highly efficient mixed anatase-rutile TiO2 for photoelectrochemical water splitting

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

doi:10.1039/d3ma00364g

Aerosol-assisted chemical vapour deposition of highly efficient mixed anatase-rutile TiO₂ for photoelectrochemical water splitting

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

School of Chemistry

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

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 TiO₂. 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 TiO₂ 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 TiO₂ 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
DOIs	https://doi.org/10.1039/d3ma00364g
Publication status	Published - 7 Sept 2023

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title = "Aerosol-assisted chemical vapour deposition of highly efficient mixed anatase-rutile TiO2 for photoelectrochemical water splitting",

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 TiO2. 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 TiO2 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 TiO2 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.",

author = "Harris-Lee, {Thom R.} and {Della Gaspera}, Enrico and Frank Marken and Jie Zhang and Bentley, {Cameron L.} and Johnson, {Andrew L.}",

note = "Funding Information: 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 Publisher Copyright: {\textcopyright} 2023 The Author(s).",

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AU - Marken, Frank

AU - Zhang, Jie

AU - Bentley, Cameron L.

AU - Johnson, Andrew L.

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N2 - 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 TiO2. 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 TiO2 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 TiO2 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

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Resolving nanoscale structure-activity for rational electrocatalyst design

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Aerosol-assisted chemical vapour deposition of highly efficient mixed anatase-rutile TiO2 for photoelectrochemical water splitting

Abstract

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Resolving nanoscale structure-activity for rational electrocatalyst design

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Centre for Electron Microscopy (MCEM)

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Aerosol-assisted chemical vapour deposition of highly efficient mixed anatase-rutile TiO₂ for photoelectrochemical water splitting