Fabrication
of Highly Crystalline SnNb<sub>2</sub>O<sub>6</sub> Shell with a Visible-Light
Response on a NaNbO<sub>3</sub> Nanowire Core
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Abstract
A visible-light-absorbing SnNb<sub>2</sub>O<sub>6</sub> shell with high crystallinity was successfully
fabricated on a NaNbO<sub>3</sub> nanowire through a molten salt treatment
of the NaNbO<sub>3</sub> nanowire of the starting material with SnCl<sub>2</sub>, whereas the fabrication was not successful on the TT phase
of a niobia nanowire. The difference will come from the formation
processes of SnNb<sub>2</sub>O<sub>6</sub> crystals (ion-exchange
reaction vs thermally induced crystallization reaction). The core/shell
nanowire obtained from NaNbO<sub>3</sub> showed photocatalytic activity
comparable to that of H<sub>2</sub> evolution in the presence of an
electron donor under visible-light irradiation (位 > 420 nm),
compared with the corresponding bulky counterpart