High-performance pure and Fe3+-ion doped ZnS quantum dots as green nanophotocatalysts for the removal of malachite green under UV-light irradiation

Hamid Reza Rajabi; Omid Khani; Mojtaba Shamsipur; Vahid Vatanpour

doi:10.1016/j.jhazmat.2013.02.007

High-performance pure and Fe³⁺-ion doped ZnS quantum dots as green nanophotocatalysts for the removal of malachite green under UV-light irradiation

Hamid Reza Rajabi^*, Omid Khani, Mojtaba Shamsipur, Vahid Vatanpour

^*Corresponding author for this work

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

301 Citations (Scopus)

Abstract

The heterogeneous photocatalysis using UV-radiation and quantum dots (QDs) is an interesting method for the treatment of water polluted with the organic substances. In this study, ZnS QDs, as a pure and doped with Fe³⁺, were prepared for photodecolorization of malachite green (MG) as a model dye. The synthesis of QDs was carried out using a chemical precipitation method in aqueous solution, in the presence of 2-mercaptoethanol as a capping agent. The XRD patterns indicated that the doped nanoparticles are crystalline, with cubic zinc blend structure. The effects of dopant content, pH, nanophotocatalyst amount, irradiation time, and initial dye concentration on the removal efficiency of MG were studied. Results showed that the QDs presented high MG decolorization efficiency, and doping with Fe³⁺ promoted the dye removal. The maximum removal of dyes was obtained at 80mg/L of photocatalyst as an optimum value for the dosage of photocatalyst in pH of 8.0.

Original language	English
Pages (from-to)	370-378
Number of pages	9
Journal	Journal of Hazardous Materials
Volume	250-251
DOIs	https://doi.org/10.1016/j.jhazmat.2013.02.007
Publication status	Published - 5 Apr 2013
Externally published	Yes

Keywords

Malachite green
Nanophotocatalysts
Photodecolorization
Quantum dots
ZnFeS
ZnS

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10.1016/j.jhazmat.2013.02.007

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title = "High-performance pure and Fe3+-ion doped ZnS quantum dots as green nanophotocatalysts for the removal of malachite green under UV-light irradiation",

abstract = "The heterogeneous photocatalysis using UV-radiation and quantum dots (QDs) is an interesting method for the treatment of water polluted with the organic substances. In this study, ZnS QDs, as a pure and doped with Fe3+, were prepared for photodecolorization of malachite green (MG) as a model dye. The synthesis of QDs was carried out using a chemical precipitation method in aqueous solution, in the presence of 2-mercaptoethanol as a capping agent. The XRD patterns indicated that the doped nanoparticles are crystalline, with cubic zinc blend structure. The effects of dopant content, pH, nanophotocatalyst amount, irradiation time, and initial dye concentration on the removal efficiency of MG were studied. Results showed that the QDs presented high MG decolorization efficiency, and doping with Fe3+ promoted the dye removal. The maximum removal of dyes was obtained at 80mg/L of photocatalyst as an optimum value for the dosage of photocatalyst in pH of 8.0.",

keywords = "Malachite green, Nanophotocatalysts, Photodecolorization, Quantum dots, ZnFeS, ZnS",

author = "Rajabi, {Hamid Reza} and Omid Khani and Mojtaba Shamsipur and Vahid Vatanpour",

year = "2013",

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doi = "10.1016/j.jhazmat.2013.02.007",

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T1 - High-performance pure and Fe3+-ion doped ZnS quantum dots as green nanophotocatalysts for the removal of malachite green under UV-light irradiation

AU - Rajabi, Hamid Reza

AU - Khani, Omid

AU - Shamsipur, Mojtaba

AU - Vatanpour, Vahid

PY - 2013/4/5

Y1 - 2013/4/5

N2 - The heterogeneous photocatalysis using UV-radiation and quantum dots (QDs) is an interesting method for the treatment of water polluted with the organic substances. In this study, ZnS QDs, as a pure and doped with Fe3+, were prepared for photodecolorization of malachite green (MG) as a model dye. The synthesis of QDs was carried out using a chemical precipitation method in aqueous solution, in the presence of 2-mercaptoethanol as a capping agent. The XRD patterns indicated that the doped nanoparticles are crystalline, with cubic zinc blend structure. The effects of dopant content, pH, nanophotocatalyst amount, irradiation time, and initial dye concentration on the removal efficiency of MG were studied. Results showed that the QDs presented high MG decolorization efficiency, and doping with Fe3+ promoted the dye removal. The maximum removal of dyes was obtained at 80mg/L of photocatalyst as an optimum value for the dosage of photocatalyst in pH of 8.0.

AB - The heterogeneous photocatalysis using UV-radiation and quantum dots (QDs) is an interesting method for the treatment of water polluted with the organic substances. In this study, ZnS QDs, as a pure and doped with Fe3+, were prepared for photodecolorization of malachite green (MG) as a model dye. The synthesis of QDs was carried out using a chemical precipitation method in aqueous solution, in the presence of 2-mercaptoethanol as a capping agent. The XRD patterns indicated that the doped nanoparticles are crystalline, with cubic zinc blend structure. The effects of dopant content, pH, nanophotocatalyst amount, irradiation time, and initial dye concentration on the removal efficiency of MG were studied. Results showed that the QDs presented high MG decolorization efficiency, and doping with Fe3+ promoted the dye removal. The maximum removal of dyes was obtained at 80mg/L of photocatalyst as an optimum value for the dosage of photocatalyst in pH of 8.0.

KW - Malachite green

KW - Nanophotocatalysts

KW - Photodecolorization

KW - Quantum dots

KW - ZnFeS

KW - ZnS

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SN - 0304-3894

VL - 250-251

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JF - Journal of Hazardous Materials

ER -

High-performance pure and Fe³⁺-ion doped ZnS quantum dots as green nanophotocatalysts for the removal of malachite green under UV-light irradiation

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Keywords

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