Ni/Ti layered double hydroxide: synthesis, characterization and application as a photocatalyst for visible light degradation of aqueous methylene blue

Dalton Transactions : an International Journal of Inorganic Chemistry
Priyadarshi Roy Chowdhury, Krishna G Bhattacharyya

Abstract

Visible light responsive 2 : 1 Ni/Ti layered double hydroxide (LDH) was synthesized by a single step hydrothermal route using commercially available Ni(NO3)2·6H2O, TiCl4 and urea. The material exhibited significant absorption in the visible range with a very narrow band gap (2.68 eV). This could be attributed to structural defects as confirmed by diffuse reflectance spectroscopy (DRS), photoluminescence (PL), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) measurements. FT-IR, TGA, DTA, DSC, HR-TEM and SEM-EDX measurements yielded information about structural aspects, thermal stability and surface morphology. Surface and pore characteristics of the material were obtained from the BET isotherm for N2 adsorption at 77 K. Zeta potential measurements were used to characterize the electrical properties of the surface while XPS revealed changes in surface states and oxygen deficiencies. The material was found to be an excellent photocatalyst for the degradation of aqueous methylene blue in visible light. The photocatalytic properties of the material were explained on the basis of the narrow band gap, the high surface area and the presence of surface defects. The photocatalytic activity improved in alkaline media [p...Continue Reading

References

May 15, 2002·Journal of Photochemistry and Photobiology. B, Biology·Shangjie XuTao Shen
Sep 4, 2009·Journal of the American Chemical Society·Cláudia Gomes SilvaHermenegildo García
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Jul 23, 2013·Acta Crystallographica Section B, Structural Science, Crystal Engineering and Materials·Ian G Richardson

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Citations

Apr 7, 2020·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Andrew Shore
Aug 29, 2020·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Zhongliang ShiHaibo Wang
Jan 24, 2017·Dalton Transactions : an International Journal of Inorganic Chemistry·Fa-Nian ShiGe Xu

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