Jump to main content
Jump to site search

Issue 8, 2016
Previous Article Next Article

Different hollow and spherical TiO2 morphologies have distinct activities for the photocatalytic inactivation of chemical and biological agents

Author affiliations

Abstract

The inactivation of Escherichia coli and Qβ phage was examined following their photocatalytic treatment with TiO2 hollows and spheres that had been prepared by electrospray, hydrothermal treatment, and calcination. The crystal structures of the hollows and spheres were assigned to TiO2 anatase, and the surface areas of the hollows and spheres were determined to be 91 and 79 m2 g−1, respectively. Interestingly, TiO2 spheres exhibited higher anti-pathogen performance than TiO2 hollows, a difference we ascribe to the prevention of light multi-scattering by microorganisms covering the surfaces of the TiO2 particles. The photocatalytic decomposition of dimethyl sulfoxide (DMSO) in the presence of TiO2 hollows and spheres was examined in order to study the dependence of photocatalytic activity on TiO2 morphology for the size scale of the reactants. TiO2 hollows provided greater photocatalytic decomposition of DMSO than did TiO2 spheres, in contrast to the pattern seen for pathogen inactivation. Fabrication of photocatalysts will need to vary depending on what substance (e.g., organic compound or biological agent) is being targeted for environmental remediation.

Graphical abstract: Different hollow and spherical TiO2 morphologies have distinct activities for the photocatalytic inactivation of chemical and biological agents

Back to tab navigation

Supplementary files

Publication details

The article was received on 05 Apr 2016, accepted on 23 Jun 2016 and first published on 06 Jul 2016


Article type: Paper
DOI: 10.1039/C6PP00093B
Photochem. Photobiol. Sci., 2016,15, 988-994

  •   Request permissions

    Different hollow and spherical TiO2 morphologies have distinct activities for the photocatalytic inactivation of chemical and biological agents

    Y. Yamaguchi, T. Shimodo, S. Usuki, K. Torigoe, C. Terashima, K. Katsumata, M. Ikekita, A. Fujishima, H. Sakai and K. Nakata, Photochem. Photobiol. Sci., 2016, 15, 988
    DOI: 10.1039/C6PP00093B

Search articles by author

Spotlight

Advertisements