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International Journal of Photoenergy
Volume 2014, Article ID 407027, 5 pages
http://dx.doi.org/10.1155/2014/407027
Research Article

UV Blocking Glass: Low Cost Filters for Visible Light Photocatalytic Assessment

Energy Safety Research Institute (ESRI), Swansea University Bay Campus, Fabian Way, SA1 8EN Swansea, UK

Received 7 October 2014; Accepted 26 November 2014; Published 8 December 2014

Academic Editor: Vincenzo Augugliaro

Copyright © 2014 Charles W. Dunnill. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A number of commercially available art protection products have been compared and assessed for their suitability as UV blocking filters in the application of “visible light” photocatalytic research. Many groups claiming visible light photocatalytic success employ filters to block out stray UV radiation in order to justify that their photocatalysts are indeed visible light photocatalysts and not UV light photocatalysts. These filters come in varying degrees of ability and price and many authors fail to correctly characterise their filters in individual papers. The use of effective filters to prevent both false positive and false negative results is important to maintain scientific rigor and create accurate understanding of the subject. The optimum UV filter would have the highest UV blocking properties (<390 nm) and simultaneously the highest visible light transmission (390–750 nm). Single and double layers of each of the glass products were assessed as well as laminate products. The conclusions show an inexpensive and highly effective setup for the conduction of visible light photochemistry that should be incorporated as a standard part in any researcher’s work where the claim of visible light activity is made.