期刊
JOURNAL OF SOLID STATE CHEMISTRY
卷 196, 期 -, 页码 282-287出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2012.06.033
关键词
Mn ions; Titanate nanosheets; Electrostatic self-assembly deposition; Layered structure; Visible-light photocatalysis
资金
- National Natural Science Foundation of China [21001093]
- Zhejiang Provincial Natural Science Foundation of China [Y4090285, Y4110418]
- Science Foundation of Zhejiang Sci-Tech University [0913840-Y]
- Qianjiang talent project of Zhejiang Province of China [2011R10048]
A novel Mn-intercalated layered titanate as highly active photocatalyst in visible-light region has been synthesized via a convenient and efficient exfoliation-flocculation approach with divalent Mn ions and monolayer titanate nanosheets. The 0.91 nm interlayer spacing of obtained photocatalyst is in accordance with the sum of the thickness of titanate nanosheet and the diameter of Mn ions. The yellow photocatalyst shows a spectral response in visible-light region and the calculated band gap is 2.59 eV. The photocatalytic performance of this material was evaluated by degradation and mineralization of an aqueous dye methylene blue under visible-light irradiation, and an enhanced photocatalytic activity in comparison with protonated titanate as well as the P25 TiO2 and N-doped TiO2 was obtained. Additionally, the layered structure is retained, no dye ions intercalating occurs during the photocatalysis process, and a similar to 90% photocatalytic activity can be remained after reusing 3 cycles. (C) 2012 Elsevier Inc. All rights reserved.
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