Enhanced photocatalytic performance of ultrasound treated GO/TiO2 composite for photocatalytic degradation of salicylic acid under sunlight illumination

Y M Hunge; A A Yadav; A G Dhodamani; N Suzuki; C Terashima; A Fujishima; V L Mathe

doi:10.1016/j.ultsonch.2019.104849

Enhanced photocatalytic performance of ultrasound treated GO/TiO₂ composite for photocatalytic degradation of salicylic acid under sunlight illumination

Ultrason Sonochem. 2020 Mar:61:104849. doi: 10.1016/j.ultsonch.2019.104849. Epub 2019 Oct 28.

Authors

Y M Hunge¹, A A Yadav², A G Dhodamani³, N Suzuki², C Terashima², A Fujishima², V L Mathe⁴

Affiliations

¹ Photocatalysis International Research Centre, Tokyo University of Science, Yazamaki, Noda 278-8510, Chiba, Japan. Electronic address: yuvihunge@gmail.com.
² Photocatalysis International Research Centre, Tokyo University of Science, Yazamaki, Noda 278-8510, Chiba, Japan.
³ Department of Chemistry, Shivaji University, Kolhapur 416004, India.
⁴ Department of Physics, Savitribai Phule Pune University, Pune 411007, India. Electronic address: vlmathe@physics.unipune.ac.in.

PMID: 31710997
DOI: 10.1016/j.ultsonch.2019.104849

Abstract

The current research work deals with the preparation of TiO₂ and GO/TiO₂ composite by simple, chemical, cost effective hydrothermal method. Graphene oxide (GO) is prepared by modified Hummer's method. Dispersion of GO is achieved by an ultrasonic cleaning bath for 1 h. using a power of 200 W and at a frequency of 40 kHz. The prepared catalyst material is characterized by different characterization techniques. XRD study confirms the prepared material is polycrystalline in nature. The synthesized TiO₂ and GO/TiO₂ photocatalyst materials are used to study the photocatalytic degradation of salicylic acid under sunlight illumination. GO/TiO₂ composite shows superior photocatalytic activity than TiO₂. GO/TiO₂ composite shows 57% degradation of salicylic acid. Mineralization of salicylic acid is studied using chemical oxygen demand.

Keywords: Chemical oxygen demand; Hydrothermal method; Photocatalytic degradation; Salicylic acid.