Nanotech 2004 Vol. 3
Nanotech 2004 Vol. 3
Technical Proceedings of the 2004 NSTI Nanotechnology Conference and Trade Show, Volume 3

Nano Particles and Molecules Chapter 8

Controlling the Photoactivity of Nanoparticles

Authors: P. Casey, S. Boskovic, K. Lawrence and T. Turney

Affilation: CSIRO(CMIT), Australia

Pages: 370 - 374

Keywords: nanoparticles, photoactivity, doped, zinc oxide

The relative photoactivity of a series of nanophase ZnO powders with varying crystallite size (20-140nm) was determined using a chemical method based on the photobleaching behaviour of the stable radical 1,1-diphenyl-2-picrylhydrazyl (DPPH). It was confirmed that photoactivity behaviour increased (one to twofold) with decreasing crystallite size for crystallites <100nm. A further series of nanophase ZnO powders doped with metal ions showed that, depending on the type and/or level of dopant, the photoactivity behaviour of nanoparticles could be reduced by more than an order of magnitude.

ISBN: 0-9728422-9-2
Pages: 561
Hardcopy: $79.95