Palladium-decorated zinc sulfide/reduced graphene oxide nanocomposites for enhanced visible light-driven photodegradation of indigo carmine

Eric S. Agorku; Messai A. Mamo; Bhekie B. Mamba; Avinash C. Pandey; Ajay K. Mishra

doi:10.1016/j.mssp.2015.01.033

Palladium-decorated zinc sulfide/reduced graphene oxide nanocomposites for enhanced visible light-driven photodegradation of indigo carmine

Eric S. Agorku, Messai A. Mamo, Bhekie B. Mamba, Avinash C. Pandey, Ajay K. Mishra

Chemical Sciences

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

32 Citations (Scopus)

Abstract

The removal of toxic organic pollutants from wastewater using reduced graphene oxide (rGO) based photocatalysts has dominated recent scientific research. As a result numerous nanomaterials have been studied and used for wastewater remediation. ZnS has been widely studied due to its versatile application in photocatalysis. This study presents the synthesis of a series of Pd-decorated ZnS/rGO nanocomposites by a coprecipitation method. The materials were characterized using Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM)-EDS, UV/visible spectrophotometry, and BET surface area analysis. Indigo carmine (IC) dye (20 ppm) was chosen as a model for organic pollutants and was used to evaluate the photocatalytic performance of the Pd-ZnS/rGO nanocomposites under simulated solar light with varying concentrations of Pd in the host material. Pd-ZnS/rGO showed significant visible light induced photocatalytic activity towards the degradation of IC. Highest photocatalytic activity was observed for the 1.0% Pd-ZnS/rGO sample (k = 2.19 × 10^-2 min^-1).

Original language	English
Pages (from-to)	119-126
Number of pages	8
Journal	Materials Science in Semiconductor Processing
Volume	33
DOIs	https://doi.org/10.1016/j.mssp.2015.01.033
Publication status	Published - May 2015

Keywords

Palladium
Photodegradation
Reduced graphene oxide
ZnS

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.mssp.2015.01.033

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title = "Palladium-decorated zinc sulfide/reduced graphene oxide nanocomposites for enhanced visible light-driven photodegradation of indigo carmine",

abstract = "The removal of toxic organic pollutants from wastewater using reduced graphene oxide (rGO) based photocatalysts has dominated recent scientific research. As a result numerous nanomaterials have been studied and used for wastewater remediation. ZnS has been widely studied due to its versatile application in photocatalysis. This study presents the synthesis of a series of Pd-decorated ZnS/rGO nanocomposites by a coprecipitation method. The materials were characterized using Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM)-EDS, UV/visible spectrophotometry, and BET surface area analysis. Indigo carmine (IC) dye (20 ppm) was chosen as a model for organic pollutants and was used to evaluate the photocatalytic performance of the Pd-ZnS/rGO nanocomposites under simulated solar light with varying concentrations of Pd in the host material. Pd-ZnS/rGO showed significant visible light induced photocatalytic activity towards the degradation of IC. Highest photocatalytic activity was observed for the 1.0% Pd-ZnS/rGO sample (k = 2.19 × 10-2 min-1).",

keywords = "Palladium, Photodegradation, Reduced graphene oxide, ZnS",

author = "Agorku, {Eric S.} and Mamo, {Messai A.} and Mamba, {Bhekie B.} and Pandey, {Avinash C.} and Mishra, {Ajay K.}",

year = "2015",

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AU - Agorku, Eric S.

AU - Mamo, Messai A.

AU - Mamba, Bhekie B.

AU - Pandey, Avinash C.

AU - Mishra, Ajay K.

PY - 2015/5

Y1 - 2015/5

N2 - The removal of toxic organic pollutants from wastewater using reduced graphene oxide (rGO) based photocatalysts has dominated recent scientific research. As a result numerous nanomaterials have been studied and used for wastewater remediation. ZnS has been widely studied due to its versatile application in photocatalysis. This study presents the synthesis of a series of Pd-decorated ZnS/rGO nanocomposites by a coprecipitation method. The materials were characterized using Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM)-EDS, UV/visible spectrophotometry, and BET surface area analysis. Indigo carmine (IC) dye (20 ppm) was chosen as a model for organic pollutants and was used to evaluate the photocatalytic performance of the Pd-ZnS/rGO nanocomposites under simulated solar light with varying concentrations of Pd in the host material. Pd-ZnS/rGO showed significant visible light induced photocatalytic activity towards the degradation of IC. Highest photocatalytic activity was observed for the 1.0% Pd-ZnS/rGO sample (k = 2.19 × 10-2 min-1).

AB - The removal of toxic organic pollutants from wastewater using reduced graphene oxide (rGO) based photocatalysts has dominated recent scientific research. As a result numerous nanomaterials have been studied and used for wastewater remediation. ZnS has been widely studied due to its versatile application in photocatalysis. This study presents the synthesis of a series of Pd-decorated ZnS/rGO nanocomposites by a coprecipitation method. The materials were characterized using Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM)-EDS, UV/visible spectrophotometry, and BET surface area analysis. Indigo carmine (IC) dye (20 ppm) was chosen as a model for organic pollutants and was used to evaluate the photocatalytic performance of the Pd-ZnS/rGO nanocomposites under simulated solar light with varying concentrations of Pd in the host material. Pd-ZnS/rGO showed significant visible light induced photocatalytic activity towards the degradation of IC. Highest photocatalytic activity was observed for the 1.0% Pd-ZnS/rGO sample (k = 2.19 × 10-2 min-1).

KW - Palladium

KW - Photodegradation

KW - Reduced graphene oxide

KW - ZnS

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ER -

Palladium-decorated zinc sulfide/reduced graphene oxide nanocomposites for enhanced visible light-driven photodegradation of indigo carmine

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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