Makwana, NM;
Hazael, R;
McMillan, PF;
Darr, JA;
(2015)
Photocatalytic water disinfection by simple and low-cost monolithic and heterojunction ceramic wafers.
Photochemical & Photobiological Sciences
, 14
(6)
pp. 1190-1196.
10.1039/c5pp00002e.
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Abstract
In this work, the photocatalytic disinfection of Escherichia coli (E. coli) using dual layer ceramic wafers, prepared by a simple and low-cost technique, was investigated. Heterojunction wafers were prepared by pressing TiO2 and WO3 powders together into 2 layers within a single, self-supported monolith. Data modelling showed that the heterojunction wafers were able to sustain the formation of charged species (after an initial "charging" period). In comparison, a wafer made from pure TiO2 showed a less desirable bacterial inactivation profile in that the rate decreased with time (after being faster initially). The more favourable kinetics of the dual layer system was due to superior electron-hole vectorial charge separation and an accumulation of charges beyond the initial illumination period. The results demonstrate the potential for developing simplified photocatalytic devices for rapid water disinfection.
| Type: | Article |
|---|---|
| Title: | Photocatalytic water disinfection by simple and low-cost monolithic and heterojunction ceramic wafers |
| Location: | England |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1039/c5pp00002e |
| Publisher version: | http://dx.doi.org/10.1039/c5pp00002e |
| Language: | English |
| Additional information: | This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Chemistry |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/1474797 |
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