Photocatalytic Bacterial Inactivation Using Bi-doped TiO2/Kaolinite Under Visible Light Irradiation

DOI

10.2991/aer.k.211222.017How to use a DOI?

Keywords

Bi-TiO2; photocatalytic; kaolinite; antibacterial inactivation; visible light

Abstract

Bismuth-doped TiO2 immobilized on kaolinite (Bi-TiO2-K) were prepared via sol-gel method, then calcined at 450oC using kaolinite as the matrix and Bi (NO3)3 as the Bi3+ cationic source. The obtained Bi-TiO2-K photocatalyst were characterized using X-ray diffraction (XRD), infrared absorption spectroscopy, diffuse reflectance spectroscopy, energy-dispersive X-ray spectroscopy (EDX) and scanning electron microscopy (SEM). The photocatalytic activity of the Bi-TiO2-K was investigated on the bacterial inactivation of Escherichia coli (EC) and Staphyloccus aureus (SA) in water solution under visible light irradiation. The photocatalytic activity test for inactivating EC and SA bacteria was determined at room temperature and pH 7. Under visible light irradiation for 180 min, the Bi-TiO2-K photocatalyst have higher bacterial inactivation as compared to unmodified Bi-TiO2 photocatalyst. After 180 min irradiation time was required to achieve bacterial reduction for an average bacterial inoculum size of 9.5 × 106 CFU mL−1. Finally, Bi doped TiO2-K could be an efficient photocatalyst for bacterial strain inactivation.

Copyright

© 2021 The Authors. Published by Atlantis Press International B.V.

Open Access

This is an open access article under the CC BY-NC license.

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TY  - CONF
AU  - Anthoni B.Aritonang
AU  - Ajuk Sapar
AU  - Annisa Furqonita
PY  - 2021
DA  - 2021/12/23
TI  - Photocatalytic Bacterial Inactivation Using Bi-doped TiO2/Kaolinite Under Visible Light Irradiation
BT  - Proceedings of the International Conference on Science and Engineering (ICSE-UIN-SUKA 2021)
PB  - Atlantis Press
SP  - 105
EP  - 111
SN  - 2352-5401
UR  - https://doi.org/10.2991/aer.k.211222.017
DO  - 10.2991/aer.k.211222.017
ID  - B.Aritonang2021
ER  -