Abstract
Monodisperse microspheres constructed with rutile TiO2 nanorods were synthesized by a hydrothermal reaction of TiCl3 with Na2C2O4, ethylene glycol (EG) and H2O at 140–220°C for 4–12 h. The diameter of the microspheres can be changed in the range of 190–1200 nm by tuning the reaction temperature and time. The constituent nanorods grow along the c-axis of rutile, the side facets of which are (110), (\(\overline{1}10),(1\overline{1}0)\), and (\(\overline{1}\overline{1}0)\). The formation of the rod-like structure results from the selective adsorption of \(\mathrm{C}_{2}\mathrm{O}_{4}^{2-}\) ions on {110} prismatic faces of rutile TiO2 nanorods. The hydrogen bonding formed between rutile TiO2 nanorods adsorbing EG drives the formation of the nanorod-based spherical nanoarchitectures. The photocatalytic ability of the as-prapared the anatase-rutile composite TiO2 nanorod-based nanospheres with a diameter of about 190 nm is stronger than that of rutile TiO2 nanorod-based nanospheres with diameters of 500 and 1000 nm.
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Tian, S., Yang, H., Cui, M. et al. Monodisperse rutile TiO2 nanorod-based microspheres with various diameters: hydrothermal synthesis, formation mechanism and diameter- and crystallinity-dependent photocatalytic properties. Appl. Phys. A 104, 149–158 (2011). https://doi.org/10.1007/s00339-010-6085-2
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DOI: https://doi.org/10.1007/s00339-010-6085-2