Instant removal of methylene blue using water-soluble non-cadmium based quantum dots

Gracia It Mwad Mbaz; Sundararajan Parani; Oluwatobi Samuel Oluwafemi

doi:10.1016/j.matlet.2021.130495

Instant removal of methylene blue using water-soluble non-cadmium based quantum dots

Gracia It Mwad Mbaz, Sundararajan Parani, Oluwatobi Samuel Oluwafemi

Chemical Sciences

University of Johannesburg

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

Contamination of water sources by dye and colourant industries has been a serious issue that could lead to a water crisis. Herein, we report a novel method for instant removal of methylene blue (MB) from the aqueous solution using water-soluble AgInS₂-ZnS (AIS-ZnS) quantum dots (QDs) as coagulant material. Briefly, AIS-ZnS QDs were synthesized in an aqueous medium using glutathione and sodium citrate as dual stabilizing agents. The as-synthesized AIS-ZnS QDs was simply mixed with MB solution and immediately filtered with a 20 nm filter to obtain clear water with very low conductivity. The removal of MB by coagulation with AIS-ZnS QDs followed by filtration was efficiently high up to 99.3%. This result shows AIS-ZnS QDs as an excellent candidate for the rapid removal of dyes.

Original language	English
Article number	130495
Journal	Materials Letters
Volume	303
DOIs	https://doi.org/10.1016/j.matlet.2021.130495
Publication status	Published - 15 Nov 2021

Keywords

Dye removal
Filtration
Methylene blue
Quantum dots
Water treatment

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.matlet.2021.130495

Cite this

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title = "Instant removal of methylene blue using water-soluble non-cadmium based quantum dots",

abstract = "Contamination of water sources by dye and colourant industries has been a serious issue that could lead to a water crisis. Herein, we report a novel method for instant removal of methylene blue (MB) from the aqueous solution using water-soluble AgInS2-ZnS (AIS-ZnS) quantum dots (QDs) as coagulant material. Briefly, AIS-ZnS QDs were synthesized in an aqueous medium using glutathione and sodium citrate as dual stabilizing agents. The as-synthesized AIS-ZnS QDs was simply mixed with MB solution and immediately filtered with a 20 nm filter to obtain clear water with very low conductivity. The removal of MB by coagulation with AIS-ZnS QDs followed by filtration was efficiently high up to 99.3%. This result shows AIS-ZnS QDs as an excellent candidate for the rapid removal of dyes.",

keywords = "Dye removal, Filtration, Methylene blue, Quantum dots, Water treatment",

author = "{It Mwad Mbaz}, Gracia and Sundararajan Parani and {Samuel Oluwafemi}, Oluwatobi",

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doi = "10.1016/j.matlet.2021.130495",

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journal = "Materials Letters",

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T1 - Instant removal of methylene blue using water-soluble non-cadmium based quantum dots

AU - It Mwad Mbaz, Gracia

AU - Parani, Sundararajan

AU - Samuel Oluwafemi, Oluwatobi

PY - 2021/11/15

Y1 - 2021/11/15

N2 - Contamination of water sources by dye and colourant industries has been a serious issue that could lead to a water crisis. Herein, we report a novel method for instant removal of methylene blue (MB) from the aqueous solution using water-soluble AgInS2-ZnS (AIS-ZnS) quantum dots (QDs) as coagulant material. Briefly, AIS-ZnS QDs were synthesized in an aqueous medium using glutathione and sodium citrate as dual stabilizing agents. The as-synthesized AIS-ZnS QDs was simply mixed with MB solution and immediately filtered with a 20 nm filter to obtain clear water with very low conductivity. The removal of MB by coagulation with AIS-ZnS QDs followed by filtration was efficiently high up to 99.3%. This result shows AIS-ZnS QDs as an excellent candidate for the rapid removal of dyes.

AB - Contamination of water sources by dye and colourant industries has been a serious issue that could lead to a water crisis. Herein, we report a novel method for instant removal of methylene blue (MB) from the aqueous solution using water-soluble AgInS2-ZnS (AIS-ZnS) quantum dots (QDs) as coagulant material. Briefly, AIS-ZnS QDs were synthesized in an aqueous medium using glutathione and sodium citrate as dual stabilizing agents. The as-synthesized AIS-ZnS QDs was simply mixed with MB solution and immediately filtered with a 20 nm filter to obtain clear water with very low conductivity. The removal of MB by coagulation with AIS-ZnS QDs followed by filtration was efficiently high up to 99.3%. This result shows AIS-ZnS QDs as an excellent candidate for the rapid removal of dyes.

KW - Dye removal

KW - Filtration

KW - Methylene blue

KW - Quantum dots

KW - Water treatment

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DO - 10.1016/j.matlet.2021.130495

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VL - 303

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JF - Materials Letters

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Instant removal of methylene blue using water-soluble non-cadmium based quantum dots

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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