Abstract
Mesoporous mixed phase titania was synthesized via a solvothermal method in the absence and presence of different organic acids (acetic acid, tartaric acid and citric acid) followed by calcinations at 700 °C/2 h. The synthesized product was characterized by XRD, DTA/TG, Raman, FTIR, N2 adsorption-desorption study, FESEM, TEM and UV-DRS. The presence of anatase and rutile phase of TiO2 was confirmed by XRD, Raman and TEM analysis. Citric acid modified TiO2 showed highest rutile content (66%) with lowest band gap energy (2.96 eV). Microstructural study of tartaric and citric acids modified TiO2 revealed spherical particles (1–3 μm) consisting of nanoparticle (10–40 nm) assembly. The photocatalyst prepared using tartaric acid showed the highest photocatalytic activity with rate constant 0.0079 min−1, which is due to its highest BET surface area (∼39 m2 g−1) and efficient synergistic effect between anatase and rutile phase.
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