<p>The advantages such as low-cost, complete mineralization, energy efficiency, environmental friendliness, and reusability have enabled the metal-oxide to play a significant role in the field of wastewater treatment. The prior studies show that the modified metal-oxide nanoparticles have high degradation efficiency of organic pollutants in the presence of visible light than unmodified. The conducting polymers have garnered significant attention in modifying metal-oxide due to their enhanced visible-light absorption, synergistic band alignment, high stability and cost-effective. The modified conducting polymer-metal-oxide shows enhanced visible light absorption, improved charge separation, bandgap narrowing making it a potential photocatalytic candidate. The prime focus of my research is to develop polyaniline-modified titanium-dioxide and their novel approach for the photocatalytic degradation of Malachite green dye. Elemental composition, crystalline structure and morphology of the materials are characterised by different techniques. The results show a reduction in band gap of TiO₂ from 3.2&#xa0;eV to 2.5&#xa0;eV after the incorporation of PANI, also a shift in absorption range from UV region to visible region. The photoluminescence intensity of TiO₂ nanoparticles was found to decrease with the addition of PANI in the nanocomposite, this can be attributed to the decreased recombination of electron–hole pairs at the PANI-TiO₂ interface. The photocatalytic performance of these catalyst was tested in the degradation of malachite green, after 120&#xa0;min, 97% of MG was degraded with PANI-TiO₂ nanocomposites under visible light was demonstrated effective pollutant degradation. Overall, the results showcased that the PANI-TiO₂ nanocomposite a promising candidate for organic pollutant removal applications.</p> Graphical Abstract <p></p>