ABSTRACT: TiO2 photocatalyst can be used to
reduce heavy metal ions into common metal ion or metal ion with lower
coordination number. This research aimed to (1) study the influence of pH on
the photoreduction activity of Pb2+ ion by TiO2, (2) study the
influence of hole scavenger on the photoreduction activity of Pb2+ ion by TiO2, (3) study the influence of light
source on the photoreduction activity of Pb2+ ion by TiO2. The method
used on this research is laboratory experiment consist of the making of TiO2 thin film, standard Pb2+ photoreduction with the variation of
pH, standard Pb2+ photoreduction
with the variation of light source. The results of Pb2+ photoreduction are analyzed by Atomic
Absorption Spectroscopy. The result of the research showed that the activity of
TiO2 to reduce Pb2+ can be optimum at pH 6, oxalic acid as
hole scavenger and UV lamp use. The sunlight can also be used as the light source
to reduce Pb2+ by TiO2 photocatalyst.
Keywords: photocatalyst, photoreduction, TiO2,
Pb2+
Penulis:
Kapti Riyani dan Tien Setyaningtyas
Kode Jurnal: jpkimiadd090054
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