The University of Southampton
University of Southampton Institutional Repository

Observation of an order of magnitude increase in the rate photocatalysis for hierarchically porous anatase films synthesized from zinc titanate coatings

Observation of an order of magnitude increase in the rate photocatalysis for hierarchically porous anatase films synthesized from zinc titanate coatings
Observation of an order of magnitude increase in the rate photocatalysis for hierarchically porous anatase films synthesized from zinc titanate coatings
In this paper we report on the use of aerosol assisted chemical vapour deposition (AACVD) to form thin films of the zinc titanate phases using zinc acetate and titanium isopropoxide as precursors in methanol solution. Analysis by XRD and XPS found that through variation in experimental conditions we have been able to synthesize films of zinc titanate with composition of Zn2TiO4 or Zn0.3Ti2.7O4.94, which adopt the spinel and pseudobrookite structure respectively. In addition, we have also formed hybrid films of Zn2TiO4 with either ZnTiO3 or ZnO. Using a technique previously reported with powders, the mixed ZnO and Zn2TiO4 films were treated with acid to produce porous Zn2TiO4 which, through reduction and vapour leaching of zinc, were converted to hierarchically porous thin films of anatase TiO2. This conversion was monitored by XRD. Analysis of photocatalytic activity of the hierarchically porous titania, using dye and stearic acid degradation tests, found a factor of 12 to 14 increase in rates of photocatalysis over conventional TiO2 thin films. Finally we are able to report a maximum formal quantum efficiency for stearic acid degradation of 1.76 × 10-3 molecules per photon.
0300-9246
1975-1985
Platt, Nathanya J.
bc81d5e9-0417-45e6-8b19-901de352856d
Kaye, Karl M.
ec2d0565-2d6d-40d6-b1f7-f783bccbfacd
Limburn, Gregory J.
afd49e4c-1afa-4c37-b608-fa0581d380f7
Cosham, Samuel D.
a2dd18d3-e232-44b6-baa0-3ba0e2aba2be
Kulak, Alexander N.
7dc57b4f-aae0-42a4-ae15-fd50ab6521c2
Palgrave, Robert G.
026ecf7b-8536-40a9-8260-b86b17c21d0e
Hyett, Geoffrey
4f292fc9-2198-4b18-99b9-3c74e7dfed8d
Platt, Nathanya J.
bc81d5e9-0417-45e6-8b19-901de352856d
Kaye, Karl M.
ec2d0565-2d6d-40d6-b1f7-f783bccbfacd
Limburn, Gregory J.
afd49e4c-1afa-4c37-b608-fa0581d380f7
Cosham, Samuel D.
a2dd18d3-e232-44b6-baa0-3ba0e2aba2be
Kulak, Alexander N.
7dc57b4f-aae0-42a4-ae15-fd50ab6521c2
Palgrave, Robert G.
026ecf7b-8536-40a9-8260-b86b17c21d0e
Hyett, Geoffrey
4f292fc9-2198-4b18-99b9-3c74e7dfed8d

Platt, Nathanya J., Kaye, Karl M., Limburn, Gregory J., Cosham, Samuel D., Kulak, Alexander N., Palgrave, Robert G. and Hyett, Geoffrey (2017) Observation of an order of magnitude increase in the rate photocatalysis for hierarchically porous anatase films synthesized from zinc titanate coatings. Dalton Transactions, 46 (2), 1975-1985. (doi:10.1039/C6DT04431J).

Record type: Article

Abstract

In this paper we report on the use of aerosol assisted chemical vapour deposition (AACVD) to form thin films of the zinc titanate phases using zinc acetate and titanium isopropoxide as precursors in methanol solution. Analysis by XRD and XPS found that through variation in experimental conditions we have been able to synthesize films of zinc titanate with composition of Zn2TiO4 or Zn0.3Ti2.7O4.94, which adopt the spinel and pseudobrookite structure respectively. In addition, we have also formed hybrid films of Zn2TiO4 with either ZnTiO3 or ZnO. Using a technique previously reported with powders, the mixed ZnO and Zn2TiO4 films were treated with acid to produce porous Zn2TiO4 which, through reduction and vapour leaching of zinc, were converted to hierarchically porous thin films of anatase TiO2. This conversion was monitored by XRD. Analysis of photocatalytic activity of the hierarchically porous titania, using dye and stearic acid degradation tests, found a factor of 12 to 14 increase in rates of photocatalysis over conventional TiO2 thin films. Finally we are able to report a maximum formal quantum efficiency for stearic acid degradation of 1.76 × 10-3 molecules per photon.

Text
Hyett_HP_TiO2_Final.pdf - Accepted Manuscript
Download (1MB)

More information

Accepted/In Press date: 14 January 2017
e-pub ahead of print date: 16 January 2017
Organisations: Organic Chemistry: SCF

Identifiers

Local EPrints ID: 402328
URI: https://eprints.soton.ac.uk/id/eprint/402328
ISSN: 0300-9246
PURE UUID: b0343a2f-3cca-4da9-9beb-aa8ec0ac68bf
ORCID for Geoffrey Hyett: ORCID iD orcid.org/0000-0001-9302-9723

Catalogue record

Date deposited: 24 Jan 2017 15:00
Last modified: 03 Dec 2019 06:28

Export record

Altmetrics

Contributors

Author: Nathanya J. Platt
Author: Karl M. Kaye
Author: Gregory J. Limburn
Author: Samuel D. Cosham
Author: Alexander N. Kulak
Author: Robert G. Palgrave
Author: Geoffrey Hyett ORCID iD

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of https://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×