Synthesis of h- and α-MoO 3 by refluxing and calcination combination: phase and morphology transformation, photocatalysis, and photosensitization

By Pannipa Wongkrua, T. Thongtem, S. Thongtem. 2013

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Hexagonal molybdenum oxide (h-MoO3) nano- and microrods were successfully synthesized by refluxing of (NH4)6Mo7O24ċ4H2O solutions with the pH 1 at 90°C for 1, 3, 5, and 7 h and were further transformed into orthorhombic molybdenum oxide (α-MoO3) microplates by calcination at 450°C for 6 h. These selected products were used to determine the degradation of methylene blue dye under 35W xenon lamp for 0-180 min, due to the photocatalysis and photosensitization processes. In this research, catalytic activity of the metastable h-MoO3 has higher efficiency than that of the thermodynamically stable α-MoO3. Their phase and morphology transformation was also explained according to the experimental results.

Subfields: Materials Chemistry, Polymers and Plastics, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/f1fb74c1440ced956634e2e998ea18c86e0ad633