Article ID Journal Published Year Pages File Type
151339 Chemical Engineering Journal 2011 6 Pages PDF
Abstract

Zn–Ti layered double hydroxides (LDHs) with different Zn/Ti ratio have been synthesized by co-precipitation of zinc and titanium salts from homogeneous solution, which were demonstrated as efficient visible-light photocatalysts. Powder X-ray diffraction (PXRD), scanning electron microscope (SEM), high-resolution transmission electron microscopy (HRTEM) and Brunauer–Emmett–Teller (BET) revealed that the resulting Zn–Ti LDHs possess high crystallinity, hierarchical structure as well as large specific surface area (91.96–107.9 m2 g−1). UV–vis diffuse reflection spectroscopy (DRS) confirmed that Zn–Ti LDHs show a broad absorption in visible light region (400–700 nm). With a low band gap of ∼3.06 eV, the as-prepared Zn–Ti LDHs displayed significant photocatalytic activity for the degradation of methylene blue (MB) under visible-light irradiation (∼100% of degradation percentage in 100 min), which is much higher than that of commercial product (Degussa P25). Therefore, this work provides a detailed understanding of semiconductor properties of Zn–Ti LDHs which was unrevealed previously, and demonstrates its potential application in the field of photocatalysis.

Related Topics
Physical Sciences and Engineering Chemical Engineering Chemical Engineering (General)
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