rGO-MoO3 Nanocomposite for superior methylene blue removal by adsorption and photocatalysis

Title

rGO-MoO3 Nanocomposite for superior methylene blue removal by adsorption and photocatalysis

Creator

Avani A.V.; Babu C.-R.; Anila E.I.

Description

Efficient MoO3 and rGO (0.5,1,2 wt.%)-MoO3 nanosorbent was prepared by facile hydrothermal method. X-ray diffraction (XRD) and Raman spectroscopy techniques confirms the orthorhombic phase. Remarkably in 10 ppm MB dye, complete removal was observed for 1:3, 1:5, 1:3.3, 1:3 (mass of catalyst: volume of dye solution) ratio for pure, 0.5 wt.%, 1 wt.%, 2 wt.% rGO-MoO3 nanocomposite, by merely stirring for one hour without any light exposure. The adsorption mechanism was examined in detail using different models including Langmuir isotherm and Pseudo second-order kinetic model. The composite sample, rGO (0.5 wt.%)-MoO3 is the most efficient nanosorbent whereas rGO (2 wt.%)-MoO3 showed the least adsorption. rGO (2 wt.%)-MoO3 was further used for time dependent study in the presence of UV and in the dark. The presence of UV enhances removal due to the combined effect of adsorption and photocatalysis. Scavenger studies were performed to analyze the mechanism of photocatalysis. 2024 Elsevier Ltd

Source

Materials Research Bulletin, Vol-180

Date

2024-01-01

Publisher

Elsevier Ltd

Subject

Adsorption; Nanosorbent; Photocatalysis; Scavenger

Coverage

Avani A.V., Optoelectronic and Nanomaterials' Research Laboratory, Department of Physics and Electronics, CHRIST (Deemed to be University), Karnataka, Bengaluru, 560029, India; Babu C.-R., Optoelectronic and Nanomaterials' Research Laboratory, Department of Physics and Electronics, CHRIST (Deemed to be University), Karnataka, Bengaluru, 560029, India; Anila E.I., Optoelectronic and Nanomaterials' Research Laboratory, Department of Physics and Electronics, CHRIST (Deemed to be University), Karnataka, Bengaluru, 560029, India

Rights

Restricted Access

Relation

ISSN: 255408; CODEN: MRBUA

Format

Online

Language

English

Type

Article

Identifier

https://doi.org/10.1016/j.materresbull.2024.113002

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