UTILISASI TiO2 -ZEOLIT DAN SINAR UV UNTUK FOTODEGRADASI ZAT WARNA CONGO RED
ABSTRACT: An investigation of
Congo Red photodegradation using TiO2 -Zeolite and UV radiation was performed.
TiO2 -Zeolite was prepared by dispersing of pillaring solution (in form
oligocations of titanium) into suspension of Zeolite. The suspension was
stirred and then filtered to separate the solid phase from the filtrate.
the solid phase was calcined by microwave
oven at 800 Watt for 5 minutes to convert the oligocations into its oxide
forms.
The calcined product and
unmodified Zeolite were characterized using x-ray diffractometry, FT-IR
spectrophotometry, X-ray fluorescence and gas sorption analysis to determine
their physicochemical properties.
Photocatalytic activity of TiO2 -Zeolite was tested on Congo Red using
following method: 50 mg of Zeolite was dispersed into 25 mL of 10-4 M Congo
Red. The dispersion was irradiated using 365 nm UV light at room temperature on
various irradiation times, i.e. 10,20,30,40 and 60 minutes. At certain irradiation time, the dispersion
was filtered and the filtrate was then analyzed its concentration using UV-vis
spectrophotometry method.
Characterization results exhibited that the formation of TiO2 on internal as well as external surfaces of
Zeolite could not be detected with x-ray
diffractometry and FT-IR spectrophotometry, however determination of titanium
using x-ray fluorescence analysis on the calcined product showed that the concentration
of titanium was much higher than Zeolite (0.22% on Zeolite and 12.08% on
TiO2-Zeolite). Gas sorption analysis result indicated that the the
calcination resulted in the increase
of specific surface area (16,31 m2/g on Zeolite and 100,96 m2/g on
TiO2 -Zeolite) as well as total pore volume of calcined product (13,34 mL/Å/g on Zeolite
and 57,54 mL/Å/g on TiO2 -Zeolite). Photocalytic activitiy test
result conducted on that dye showed that ca 99 % of Congo Red was degraded by
the system TiO2 -Zeolite after UV irradiation for 60 minutes.
Penulis: Karna Wijaya, Eko
Sugiharto, Is Fatimah, Sri Sudiono, Diyan Kurniaysih
Kode Jurnal: jptindustridd060003
