在 NaNbO3 纳米线核上制备具有可见光响应的高结晶 SnNb2O6 壳。

Fabrication of highly crystalline SnNb2O6 shell with a visible-light response on a NaNbO3 nanowire core.

机构信息

Department of Applied Chemistry, Faculty of Science, Tokyo University of Science, 1-3 Kagurazaka, Shinjyuku-Ku, Tokyo 162-8601, Japan.

出版信息

Inorg Chem. 2013 May 20;52(10):5621-3. doi: 10.1021/ic4002175. Epub 2013 Apr 30.

DOI:10.1021/ic4002175

PMID:23631434

Abstract

A visible-light-absorbing SnNb2O6 shell with high crystallinity was successfully fabricated on a NaNbO3 nanowire through a molten salt treatment of the NaNbO3 nanowire of the starting material with SnCl2, whereas the fabrication was not successful on the TT phase of a niobia nanowire. The difference will come from the formation processes of SnNb2O6 crystals (ion-exchange reaction vs thermally induced crystallization reaction). The core/shell nanowire obtained from NaNbO3 showed photocatalytic activity comparable to that of H2 evolution in the presence of an electron donor under visible-light irradiation (λ > 420 nm), compared with the corresponding bulky counterpart.

摘要

成功地在 NaNbO3 纳米线上制备了具有高光催化活性的 SnNb2O6 壳层，其结晶度高。这是通过将起始原料的 NaNbO3 纳米线与 SnCl2 在熔融盐中处理而实现的，而在 TT 相的铌纳米线中则没有成功。这种差异来自于 SnNb2O6 晶体的形成过程（离子交换反应与热诱导结晶反应）。与相应的块状对应物相比，从 NaNbO3 获得的核/壳纳米线在可见光（λ>420nm）照射下存在电子给体时，其光催化活性可与 H2 演化相媲美。