Visible light photodegradation of organic dyes using electrochemically synthesized MoO3/ZnO

Title

Visible light photodegradation of organic dyes using electrochemically synthesized MoO3/ZnO

Creator

Jose A.; Pai S.D.K.R.; Pinheiro D.; Kasinathan K.

Description

In this study, flake-like MoO3-ZnO composite was prepared using a simple and robust electrochemical setup. The composite was characterized by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, elemental analysis, X-ray photoelectron spectroscopy, thermogravimetric analysis, photoluminescence, zeta potential analysis, and electrochemical impedance study. The modified ZnO shows a remarkable catalytic activity towards the photodegradation of three potentially hazardous dyes, malachite green, crystal violet, and methylene blue. More than 95% of both malachite green and crystal violet degraded within 140 min under visible light irradiation. Scavenger studies reveal that OH radicals produced by the photo-separated charges on MoO3-ZnO are responsible for the degradation of all three dyes. The photoactive charge carriers show less recombination rate as evidenced by the photoluminescence spectrum due to the interparticle charge migration process. This work suggests a new versatile procedure for the synthesis of MoO3-ZnO composites and establishes its photocatalytic efficacy under visible light with three common pollutant dyes found in wastewater. Graphical Abstract: [Figure not available: see fulltext.] 2021, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.

Source

Environmental Science and Pollution Research, Vol-28, No. 37, pp. 52202-52215.

Date

2021-01-01

Publisher

Springer Science and Business Media Deutschland GmbH

Subject

Electrochemical synthesis; MoO₃-ZnO nanocomposite; Organic pollutants; PEG capping; Photocatalytic degradation; ZnO

Coverage

Jose A., Department of Chemistry, CHRIST (Deemed to be University), Bangalore, 560029, Karnataka, India; Pai S.D.K.R., Department of Chemistry, CHRIST (Deemed to be University), Bangalore, 560029, Karnataka, India; Pinheiro D., Department of Chemistry, CHRIST (Deemed to be University), Bangalore, 560029, Karnataka, India; Kasinathan K., Department of Chemistry, CHRIST (Deemed to be University), Bangalore, 560029, Karnataka, India

Rights

Restricted Access

Relation

ISSN: 9441344; PubMed ID: 34003439; CODEN: ESPLE

Format

Online

Language

English

Type

Article

Identifier

https://doi.org/10.1007/s11356-021-14311-9

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