Volume 17
您当前的位置:首页 > 期刊文章 > 过刊浏览 > Volumes 12-17 (2014) > Volume 17
Tretyachenko, E. V., Gorokhovsky, A. V., Yurkov, G. Y., Fedorov, F. S., Vikulova, M. A., Kovaleva, D. S., & Orozaliev, E. E. (2014). Adsorption and photo-catalytic properties of layered lepidocrocite-like quasi-amorphous compounds based on modified potassium polytitanates. Particuology, 17, 22–28. https://doi.org/10.1016/j.partic.2013.12.002
Adsorption and photo-catalytic properties of layered lepidocrocite-like quasi-amorphous compounds based on modified potassium polytitanates
E.V. Tretyachenko, A.V. Gorokhovsky, G.Y. Yurkov, F.S. Fedorov *, M.A. Vikulova, D.S. Kovaleva, E.E. Orozaliev
Department of Chemistry, Saratov State Technical University, Polytekhnicheskaya 77, 410054 Saratov, Russia
10.1016/j.partic.2013.12.002
Volume 17, December 2014, Pages 22-28
Received 27 August 2013, Revised 18 December 2013, Accepted 23 December 2013, Available online 26 February 2014.
E-mail: fedorov_fs@daad-alumni.de

Highlights

• Quasi-amorphous potassium titanate nanoparticles were modified in transition metal salt solutions.

• PPT particles were modified through metal ion intercalation and/or metal oxides decoration.

• Studied systems support degradation of organic dye under visible light irradiation.

• Photocatalytic properties are described by multiple p–n junctions and decreased band gap energy.


Abstract

TiO2 compounds possess relatively high adsorption abilities and exhibit high photocatalytic activities that exhibit potential for the destruction of organic pollutants in natural and waste waters. Nanostructured potassium polytitanates modified using transition metals and their oxides/hydroxides generate new nanomaterials that operate in the visible spectral range.

This study presents the synthesis and investigation of the structure, composition and photocatalytic activity of powdered nanoscale quasi-amorphous potassium polytitanates particles modified with iron, zinc, copper, cobalt and nickel sulfate in aqueous solutions. All of the powders investigated in this work exhibit a high adsorption capacity for methylene blue dye (15–20 mg/g) related to the well-developed surface of the layered potassium polytitanate particles. Introducing transition metals and their oxides/hydroxides influences the electronic structure of the obtained systems. A high photocatalytic activity was observed for systems containing iron, zinc, nickel and their oxides/hydroxides in the ultraviolet and visible ranges.


Graphical abstract
Keywords
Layered potassium titanate; Chemical modification; Heterostructured particles; Photocatalytic activity; Adsorption