Enhancement in Photocatalytic Efficiency of Commercial TiO2 Nanoparticles by Calcination: A Case of Doxycycline Removal

Abstract

In this study, the pure and calcined forms of Degussa TiO2 were applied for photocatalytic removal of doxycycline - a broad-spectrum tetracycline antibiotic. The calcination of TiO2 at 500 °C enhanced the photocatalytic efficiency of the TiO2 under optimal operational conditions of 5 ppm of doxycycline, 0.25 g/L of TiO2, pH 6.5, 120 min, and room temperature. In addition, the changes in morphology, crystal structure, and optical properties of the materials before and after calcination were observed by scanning electron microscopy, X-ray diffraction, and UV-Visible spectroscopy. The reaction kinetics of the doxycycline removal was also investigated based on the Langmuir-Hinshelwood model with a correlation coefficient R2 of >80%. Results showed that the photocatalytic ability of TiO2 is stable and enhanced after being calcined at a suitable temperature of 500 °C. This opens up the potential application of TiO2 in the treatment of emerging organic pollutants in water. Copyright © 2022 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

Ag-TiO2 for Efficient Methylene Blue Photodegradation Under Visible Light Irradiation

“…The quick transmission of excited, high-energy electrons from the TiO2 conduction band to the metal is improved by Ag-TiO2 structure. The primary goal is to prevent and minimize electron -hole recombination, and Ag will react as electron traps to enhance the durability of the electrons [30].…”

Pengaruh Waktu Degradasi Terhadap Fotodegradasi Zat Warna Fenol Red Menggunakan Katalis TiO2-Ag

“…Elektron dan hole ini kemudian akan bereaksi dengan zat warna untuk mendegradasinya (Rahman & Sulistyowati, 2023). Penggunaan TiO2 sebagai katalis memiliki keterbatasan dalam mendegradasi zat warna sehingga reaksi yang terjadi pada permukaan katalis tidak maksimal (Tien et al, 2022).…”