| Abstrak/Abstract |
This study investigated the decolorization of Remazol Black (RBB) using a TiO2 photocatalyst modified by S and Co co-doped TiO2 (S-Co-TiO2 ) from a single precursor. X-ray diffraction,
Fourier transform infrared spectroscopy, scanning electron microscopy, and UV–Vis specular reflectance spectroscopy were used to characterize the photocatalysts. The results revealed that the
band-gap energy of the doped and co-doped TiO2 decreased, with the S-Co-TiO2 8% showing the
greatest one, and was found to be 2.78 eV while undoped TiO2 was 3.20 eV. The presence of S and
Co was also identified through SEM-EDX. An activity study on RBB removal revealed that the
S-Co-TiO2 photocatalyst showed the best result compared to undoped TiO2
, S-TiO2
, and Co-TiO2
.
The S-Co-TiO2 8% photocatalyst reduced RBB concentration (20 mg L−1
) up to 96?ter 90 min of
visible light irradiation, whereas S-TiO2
, Co-TiO2
, and undoped TiO2 reduced it to 89%, 56%, and
39%, respectively. A pH optimization study showed that the optimum pH of RBB decolorization by
S-Co-TiO2 was 3.0, the optimum mass was 0.6 g L−1
, and reuse studies show that S-Co-TiO2 8% has
the potential to be used repeatedly to remove colored pollutants. The results obtained indicate that
the modification of S, Co co-doped titania synthesized using a single precursor has been successfully
carried out and showed excellent characteristics and activity compared to undoped or doped TiO2
. |
