Abstract
Single-crystalline Bi4Ti3O12 nanosheets with a thickness less than 10 nm and a lateral size larger than 20 μm have successfully synthesized via a surfactant-free hydrothermal route by employing K2Ti6O13 nanofibers prepared in advance as titanium sources. The as-prepared samples were characterized by X-ray diffraction, field emission scanning electron microscopy, transmission electron microscopy (TEM), high-resolution TEM, and selected area electron diffraction, respectively. The results revealed that the single-crystalline Bi4Ti3O12 nanosheets are dominated with (010) facets. In general, the slow exfoliation of TiO6 octahedron lamella and the fast combination of the subnitrate radicals with the Bi3+ ions situated in (010) planes induce the crystallization of the single-crystalline Bi4Ti3O12 nanosheets. In addition, the as-prepared single-crystalline Bi4Ti3O12 nanosheets propose a narrowed gap of ca. 2.41 eV and after modified by Pt-quantum-dots exhibit excellent visible-light photocatalytic activity. It is believed that the surfactant-free in the hydrothermal system induce more amount of surface state responsible for the narrowed gap and the excellent visible-light photocatalytic activity.
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This work is supported by the Zhejiang Natural Science Foundation, China, under Grant No. LY18E020001, and National Natural Science Foundation of China, under Grant No. 51602282.
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Jiang, W., Chen, T., Yang, X. et al. Surfactant-Free Synthesis of Single-Crystalline Bi4Ti3O12 Nanosheets with Excellent Visible-Light Photocatalytic Activity. Catal Surv Asia 23, 322–331 (2019). https://doi.org/10.1007/s10563-019-09279-z
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DOI: https://doi.org/10.1007/s10563-019-09279-z