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Issue 12, 2018
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Bismuth titanate modified and immobilized TiO2 photocatalysts for water purification: broad pollutant scope, ease of re-use and mechanistic studies

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Abstract

Deposition of titanium dioxide (TiO2) coatings onto glass beads from a P25 enriched sol of titanium butoxide is described. This method gives a robust and stable covering, to which small bismuth containing clusters of 1–5 nm have been introduced using a simple and scalable sequential ionic layer adsorption reaction (SILAR) method. This bismuth-modified TiO2 coating has been proven to show significant improvements over the pristine TiO2 samples for a variety of different pollutants including intermediates in consumer product manufacture, pesticides, drugs and explosives. Using scavenger tests, the mechanism of degradation for each of the pollutant molecules tested has been probed, and a thorough discussion of the differences presented. The applicability of the system has also been assessed, with ease of re-use of the photocatalyst-bead apparatus investigated through recycling tests.

Graphical abstract: Bismuth titanate modified and immobilized TiO2 photocatalysts for water purification: broad pollutant scope, ease of re-use and mechanistic studies

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Article information


Submitted
17 Aug 2018
Accepted
30 Oct 2018
First published
09 Nov 2018

This article is Open Access

Environ. Sci.: Water Res. Technol., 2018,4, 2170-2178
Article type
Paper

Bismuth titanate modified and immobilized TiO2 photocatalysts for water purification: broad pollutant scope, ease of re-use and mechanistic studies

G. Odling, Z. Y. Pong, G. Gilfillan, C. R. Pulham and N. Robertson, Environ. Sci.: Water Res. Technol., 2018, 4, 2170
DOI: 10.1039/C8EW00568K

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