Picture of virus under microscope

Research under the microscope...

The Strathprints institutional repository is a digital archive of University of Strathclyde research outputs.

Strathprints serves world leading Open Access research by the University of Strathclyde, including research by the Strathclyde Institute of Pharmacy and Biomedical Sciences (SIPBS), where research centres such as the Industrial Biotechnology Innovation Centre (IBioIC), the Cancer Research UK Formulation Unit, SeaBioTech and the Centre for Biophotonics are based.

Explore SIPBS research

Photo-oxidation of water sensitized by TiO2 and WO3 in presence of different electron acceptors

Mills, A. and Velenzuela, M. (2004) Photo-oxidation of water sensitized by TiO2 and WO3 in presence of different electron acceptors. Revista Mexicana de Fisica, 50 (3). pp. 287-296. ISSN 0035-001X

Full text not available in this repository. (Request a copy from the Strathclyde author)

Abstract

The photo-oxidation of water is studied in presence of UV-light (lambda < 400 nm) using titanium dioxide (TiO2) and tungsten oxide (WO3 , micro- and nano-crystalline) semiconductors in presence of different sacrificial electron acceptors (SEA): Fe(NO3)(2), Na2S2O8, Ce(SO4)(2), Co[(NH3)(5)Cl]Cl-2, AgNO3, HgCl2 and Cu(NO3)(2). TiO2 is 5 to 10 times more photoactive than WO3 with reference to oxygen evolution. Ag ions are the best of the SEAs, for all the semiconductors tested in the photo-redox process. No oxygen evolution is observed when Hg2+ or Cu2+ ions are used as SEAs. The effect of high (10(-2) Mol dm(-3)) and low (10(-3) mol dm(-3)) SEA concentrations is also studied but no common trend is observed. Instead, each system (i.e., SEA+H2O+Semiconductor) exhibits a different behaviour and the results are rationalised in terms of the spectral and redox potential features of the system.