Synthesis of Ag-TiO2/perlite composite for the photodegradation of methylene blue under solar light irradiation

Pham Xuan Nui; Nguyen Thi Hoa; Nguyen Trung Tien; Le Huu Tai; Tran Thi Van Thi

doi:10.51316/jca.2020.068

Authors

Pham Xuan Nui Department of Chemical Engineering, Hanoi University of Mining and Geology, 18-Vien Street, Bac Tu Liem District, Hanoi, Vietnam Author
Nguyen Thi Hoa Department of Chemical Engineering, Hanoi University of Mining and Geology, 18-Vien Street, Bac Tu Liem District, Hanoi, Vietnam. Author
Nguyen Trung Tien Department of Chemical Engineering, Hanoi University of Mining and Geology, 18-Vien Street, Bac Tu Liem District, Hanoi, Vietnam Author
Le Huu Tai Department of Chemical Engineering, Hanoi University of Mining and Geology, 18-Vien Street, Bac Tu Liem District, Hanoi, Vietnam. Author
Tran Thi Van Thi Faculty of Chemistry, College of Science, Hue University, 77-Nguyen Hue Str., Hue city, Vietnam Author

DOI:

https://doi.org/10.51316/jca.2020.068

Keywords:

Perlite, Photocatalyst, Ag-TiO2, Ag-TiO2/perlite, Methylene blue

Abstract

In this research, photocatalytic materials of TiO₂, Ag-TiO₂, Ag-TiO₂/perlite were synthesized by the sol-gel method. By combining the photocatalytic activity between Ag-TiO₂ and Perlite mineral, the Ag-TiO₂/perlite composite has overcome the disadvantages of pristine TiO₂, such as high band gap energy, low light utilization and easy recombination of electrons and holes. The synthesized samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), nitrogen adsorption-desorption isotherm, UV-vis diffuse reflectance spectroscopy (UV-vis DRS). The photocatalytic activity of the samples was tested for degradation of methylene blue (MB) under solar light irradiation. Photodegradation studies revealed a 95% removal of MB dye via the synthesized Ag-TiO2/perlite after 150 min of irradiation. Reusability of this hybrid photocatalyst system was tested and only a 3% decrease was observed after four cycles.

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