Preparation of a colloidal array of NaTaO3nanoparticlesvia a confined space synthesis route and its photocatalytic application
Literature Information
Toshiyuki Yokoi, Junya Sakuma, Kazuhiko Maeda, Kazunari Domen, Takashi Tatsumi, Junko N. Kondo
The confined space synthesis method has been applied to the preparation of sodium tantalate (NaTaO3); hydrothermal reaction of NaOH and Ta2O5 was carried out in the pores of a three-dimensional mesoporous carbon, which was replicated by the colloidal array of silica nanospheres (SNSs) 20 nm in size. This approach led to the formation of a colloidal array of NaTaO3 nanoparticles 20 nm in size with a surface area of 34 m2 g−1. The photocatalytic performance of the colloidal array of NaTaO3 nanoparticles for overall water splitting under UV irradiation (λ > 200 nm) was evaluated after loading a NiO cocatalyst onto NaTaO3 samples. The NiO-loaded NaTaO3 nanoparticles showed photocatalytic activity for overall water splitting more than three times as high as non-structured bulk NaTaO3 particles.
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