Effects of Ag, Nd codoping on structural, optical and photocatalytic properties of TiO2 nanocomposite synthesized via sol-gel method using starch as a green additive

Authors

• Maryam Bordbar ¹

• Department of Chemistry, Faculty of Science, University of Qom, Qom, Iran.

Abstract

In this paper, undoped TiO₂ and Ag-Nd-codoped TiO₂ nanocomposites with different molar ratios of dopants were synthesized by the sol-gel method using starch as a natural additive. Structures were investigated by FT-IR and UV–Vis spectroscopy, SEM, and XRD methods. Moreover, the direct band gap was calculated by Tauc’s approach. Furthermore, photocatalytic activity of all samples were investigated under UV irradiation in an aqueous medium. Compared with undoped TiO₂, the band gap of the Ag-Nd -TiO₂ samples decreases and depends on the content of dopants. In addition, photocatalytic activity improves in the presence of appropriate amount (1.5 mol%) of Ag and Nd as dopants.

Keywords

• Band gap
• Phptocatalytic activity
• Ag -Nd- TiO2 nanocomposite
• Sol-gel method