In:
Key Engineering Materials, Trans Tech Publications, Ltd., Vol. 317-318 ( 2006-8), p. 837-840
Abstract:
ZnO nanopowder was prepared by a novel “solution-combustion method (SCM)” and it
was used as a semiconductor photocatalyst to evaluate its photoreduction properties. Aqueous Pb-EDTA and Cu-EDTA solutions of heavy metal ions (Pb and Cu) were used for the photocatalysis
reaction under UV illumination. The result was then compared with other semiconductor photocatalyst powder such as TiO2 powder (P25; Degussa) and TiO2 powder prepared by
homogeneous precipitation process at low temperature (HPPLT). In the removal of Pb++ ions, the ZnO nanopowder showed 2.6 fold higher removal rate than P25 TiO2 powder and 1.8 fold higher than
HPPLT TiO2. Also the ZnO nanopowder showed the highest removal rate of the Cu++ ions from the solution among the different photocatalyst powders compared. The superior photoreduction ability of
the ZnO nanopowder appears to be due to its excellent UV absorption characteristics. This was confirmed by the photoluminescence (PL) measurement.
Type of Medium:
Online Resource
ISSN:
1662-9795
DOI:
10.4028/www.scientific.net/KEM.317-318
DOI:
10.4028/www.scientific.net/KEM.317-318.837
Language:
Unknown
Publisher:
Trans Tech Publications, Ltd.
Publication Date:
2006
detail.hit.zdb_id:
2073306-9