Influence of the amount of hydrogen fluoride on the formation of (001)-faceted titanium dioxide nanosheets and their photocatalytic hydrogen generation performance
The influence of the amount of hydrogen fluoride (HF) on product formation from the hydrothermal reaction of titanium butoxide and concentrated HF is investigated. Low HF contents lead to a preference for the formation of small TiO2 nanoparticles, medium HF contents lead to a preference for TiO2 nanosheets, and high HF contents lead to a preference for large TiOF2 particles. Meanwhile, TiO2 nanosheets display higher activity in photocatalytic hydrogen generation than that of smaller TiO 2 nanoparticles; this demonstrates the higher photocatalytic activity of (001) facets over others. The synergistic effect between TiO2 nanosheets and TiOF2 particles could improve the performance of TiO2 nanosheets owing to possible charge separation over their interface, although TiOF2 particles themselves barely show any activity.
Physics, Astronomy, and Materials Science
hydrogen fluoride, hydrothermal synthesis, nanostructures, photochemistry, titanates
Zhang, Yuliang, Mingwei Shang, Yifan Mi, Ting Xia, Petra Wallenmeyer, James Murowchick, Lifeng Dong, Qiao Zhang, and Xiaobo Chen. "Influence of the amount of hydrogen fluoride on the formation of (001)-faceted titanium dioxide nanosheets and their photocatalytic hydrogen generation performance." ChemPlusChem 79, no. 8 (2014): 1159.