Application of Enhanced Photocatalytic Activity of Phosphomolybdic Acid upon Hybridization with Hexamine-Cobalt in Fabrication of Visible Light-Driven Titanium Dioxide Nanoparticles
نویسندگان
1 1. Department of Chemistry, Payame Noor University, 19395-3697, Tehran, Iran 2. Research Center of Environmental Chemistry, Payame Noor University, Tehran, Iran
2 Department of Chemistry, Payame Noor University, 19395-3697, Tehran, Iran
3 Department of Chemistry, Payame Noor University, 19395-3697, Tehran, Iran
4 Department of Chemistry, Payame Noor University, 19395-3697, Tehran, Iran
doi
10.30473/ijac.2025.73480.1315چکیده
Phosphomolybdate-hexamine-cobalt (PMA-HMT-Co), a new hybrid prepared by coprecipitation method, was used for coating of titanium dioxide nanoparticles in order to improve photocatalytic activity to visible light. PMA-HMT-Co and TiO2-PMA-HMT-Co were characterized by Fourier transform infrared spectroscopy, powder X-ray diffraction and scanning electron microscopy. The diffuse reflectance spectroscopy was used to evaluate the band gap variation. The band gap of PMA-HMT-Co decreased and hence, its photocatalytic activity was enhanced under sunlight irradiation. With the incorporation of PMA-HMT-Co, the band gap of titanium dioxide was transferred from UV to visible region successfully. Rhodamine B (RhB) decolorization tests indicated higher photocatalytic activity of TiO2-PMA-HMT-Co under sunlight irradiation. Photodegradation takes place through the excitation of modified titanium dioxide and the creation of holes (h+) and oxidation of dye.
