Enhanced Photocatalytic Degradation of Congo Red Dye Using Green-Synthesized TiO₂ and PANI/TiO₂ with Papaya Leaf as Bio-Reduction
DOI:
https://doi.org/10.48048/tis.2025.9119Keywords:
Photocatalysis, TiO2 NPs, PANI/TiO2 NCs, DegradationAbstract
This study uses the green synthesis method to investigate the photocatalytic properties of TiO2 nanoparticles (NPs) and PANI/TiO2 nanocomposites (NCs). The in-situ polymerization method used the papaya leaf extract as a reducing agent. TiO2 NPs have a particle size of 56 nm and a band gap of 2.46 eV, while PANI/TiO2 NCs have a particle size of 44 nm and a band gap of 2.06 eV. The performance of TiO2 NPs and PANI/TiO2 NCs as semiconductor-based photocatalysis was evaluated using Congo red dye degradation. The results showed that PANI/TiO2 NCs have better photocatalytic performance with a Congo red dye degradation rate of 97.12 %, higher than TiO2 nanoparticles (95.52 %). This enhanced performance can contribute to the synergistic effect between the TiO2 and PANI, leading to improved charge separation and reduced recombination.
HIGHLIGHTS
- TiO2 nanoparticles made from green synthesis using papaya leaf bio-reduction.
- TiO2 has an anatase crystal structure, a particle size of 56 nm, and a band gap energy of 2.46 eV.
- PANI/TiO2 nanocomposites were synthesized using in-situ polymerization and had a particle size of 44 nm with a band gap energy of 2.06 eV.
- PANI/TiO2 NCs have a higher degradation rate towards Congo red dye than TiO2
GRAPHICAL ABSTRACT
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