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Molecules. 2015 Mar 30;20(4):5574-615. doi: 10.3390/molecules20045574.

A review of heterogeneous photocatalysis for water and surface disinfection.

Author information

1
Nanotechnology and Integrated BioEngineering Centre, Ulster University, Newtownabbey, Northern Ireland BT37 0QB, UK. j.byrne@ulster.ac.uk.
2
Nanotechnology and Integrated BioEngineering Centre, Ulster University, Newtownabbey, Northern Ireland BT37 0QB, UK. psm.dunlop@ulster.ac.uk.
3
Nanotechnology and Integrated BioEngineering Centre, Ulster University, Newtownabbey, Northern Ireland BT37 0QB, UK. jwj.hamilton@ulster.ac.uk.
4
Plataforma Solar de Almería-CIEMAT, PO Box 22, 04200 Tabernas, Almería, Spain. pfernandez@psa.es.
5
Plataforma Solar de Almería-CIEMAT, PO Box 22, 04200 Tabernas, Almería, Spain. mpolo@psa.es.
6
Nanotechnology and Integrated BioEngineering Centre, Ulster University, Newtownabbey, Northern Ireland BT37 0QB, UK. Sharma-P2@email.ulster.ac.uk.
7
Nanotechnology and Integrated BioEngineering Centre, Ulster University, Newtownabbey, Northern Ireland BT37 0QB, UK. a.vennard@email.ulster.ac.uk.

Abstract

Photo-excitation of certain semiconductors can lead to the production of reactive oxygen species that can inactivate microorganisms. The mechanisms involved are reviewed, along with two important applications. The first is the use of photocatalysis to enhance the solar disinfection of water. It is estimated that 750 million people do not have accessed to an improved source for drinking and many more rely on sources that are not safe. If one can utilize photocatalysis to enhance the solar disinfection of water and provide an inexpensive, simple method of water disinfection, then it could help reduce the risk of waterborne disease. The second application is the use of photocatalytic coatings to combat healthcare associated infections. Two challenges are considered, i.e., the use of photocatalytic coatings to give "self-disinfecting" surfaces to reduce the risk of transmission of infection via environmental surfaces, and the use of photocatalytic coatings for the decontamination and disinfection of medical devices. In the final section, the development of novel photocatalytic materials for use in disinfection applications is reviewed, taking account of materials, developed for other photocatalytic applications, but which may be transferable for disinfection purposes.

PMID:
25830789
PMCID:
PMC6272584
DOI:
10.3390/molecules20045574
[Indexed for MEDLINE]
Free PMC Article

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