Abstract
• Water soluble cadmium free ternary AgInS 2 -ZnS quantum dots (QDs) was synthesized. • The QDs served as a coagulant to remove methylene blue dye from aqueous solution. • High removal efficiency of 99.3% was obtained. • Excellent technique for the quick removal of dye. 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 AgInS 2 -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.
Published Version
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