Photocatalytic degradation of indigo carmine using Nd-doped TiO2-decorated graphene oxide nanocomposites

Samuel Osei Bonsu Oppong; William W. Anku; Sudheesh K. Shukla; Eric S. Agorku; Poomani P. Govender

doi:10.1007/s10971-016-4062-8

Photocatalytic degradation of indigo carmine using Nd-doped TiO₂-decorated graphene oxide nanocomposites

Samuel Osei Bonsu Oppong, William W. Anku, Sudheesh K. Shukla, Eric S. Agorku, Poomani P. Govender

Chemical Sciences

University of Johannesburg

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

49 Citations (Scopus)

Abstract

Abstract: A series of neodymium-doped titanium dioxide (Nd–TiO₂) decorated on graphene oxide (GO) were synthesized by sol–gel method. The structures, morphologies and optical properties of the nanocomposites (Nd–TiO₂–GO) were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Raman spectroscopy, Fourier transform infrared spectroscopy and ultraviolet–visible spectroscopy. The photocatalytic study of Nd–TiO₂–GO nanocomposites was evaluated via the degradation of indigo carmine under simulated solar light. Results demonstrated that the photodegradation efficiency of indigo carmine solutions irradiated by solar simulated light for 3 h with the nanocomposites used as a catalyst reached a level of 92 % (0.6 % Nd). This high photocatalytic degradation of indigo carmine solutions by the Nd–TiO₂–GO nanocomposites is ascribed to the spherical nanocrystalline size of TiO₂. Graphical Abstract: [Figure not available: see fulltext.]

Original language	English
Pages (from-to)	38-49
Number of pages	12
Journal	Journal of Sol-Gel Science and Technology
Volume	80
Issue number	1
DOIs	https://doi.org/10.1007/s10971-016-4062-8
Publication status	Published - 1 Oct 2016

Keywords

Graphene oxide
Indigo carmine, sol–gel
Nanomaterials
Photodegradation
TiO, neodymium

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
General Chemistry
Biomaterials
Condensed Matter Physics
Materials Chemistry

Access to Document

10.1007/s10971-016-4062-8

Cite this

@article{cb493a9a1f864e7abb5615611a17e01d,

title = "Photocatalytic degradation of indigo carmine using Nd-doped TiO2-decorated graphene oxide nanocomposites",

abstract = "Abstract: A series of neodymium-doped titanium dioxide (Nd–TiO2) decorated on graphene oxide (GO) were synthesized by sol–gel method. The structures, morphologies and optical properties of the nanocomposites (Nd–TiO2–GO) were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Raman spectroscopy, Fourier transform infrared spectroscopy and ultraviolet–visible spectroscopy. The photocatalytic study of Nd–TiO2–GO nanocomposites was evaluated via the degradation of indigo carmine under simulated solar light. Results demonstrated that the photodegradation efficiency of indigo carmine solutions irradiated by solar simulated light for 3 h with the nanocomposites used as a catalyst reached a level of 92 % (0.6 % Nd). This high photocatalytic degradation of indigo carmine solutions by the Nd–TiO2–GO nanocomposites is ascribed to the spherical nanocrystalline size of TiO2. Graphical Abstract: [Figure not available: see fulltext.]",

keywords = "Graphene oxide, Indigo carmine, sol–gel, Nanomaterials, Photodegradation, TiO, neodymium",

author = "Oppong, {Samuel Osei Bonsu} and Anku, {William W.} and Shukla, {Sudheesh K.} and Agorku, {Eric S.} and Govender, {Poomani P.}",

note = "Publisher Copyright: {\textcopyright} 2016, Springer Science+Business Media New York.",

year = "2016",

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doi = "10.1007/s10971-016-4062-8",

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T1 - Photocatalytic degradation of indigo carmine using Nd-doped TiO2-decorated graphene oxide nanocomposites

AU - Oppong, Samuel Osei Bonsu

AU - Anku, William W.

AU - Shukla, Sudheesh K.

AU - Agorku, Eric S.

AU - Govender, Poomani P.

PY - 2016/10/1

Y1 - 2016/10/1

N2 - Abstract: A series of neodymium-doped titanium dioxide (Nd–TiO2) decorated on graphene oxide (GO) were synthesized by sol–gel method. The structures, morphologies and optical properties of the nanocomposites (Nd–TiO2–GO) were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Raman spectroscopy, Fourier transform infrared spectroscopy and ultraviolet–visible spectroscopy. The photocatalytic study of Nd–TiO2–GO nanocomposites was evaluated via the degradation of indigo carmine under simulated solar light. Results demonstrated that the photodegradation efficiency of indigo carmine solutions irradiated by solar simulated light for 3 h with the nanocomposites used as a catalyst reached a level of 92 % (0.6 % Nd). This high photocatalytic degradation of indigo carmine solutions by the Nd–TiO2–GO nanocomposites is ascribed to the spherical nanocrystalline size of TiO2. Graphical Abstract: [Figure not available: see fulltext.]

AB - Abstract: A series of neodymium-doped titanium dioxide (Nd–TiO2) decorated on graphene oxide (GO) were synthesized by sol–gel method. The structures, morphologies and optical properties of the nanocomposites (Nd–TiO2–GO) were characterized by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, Raman spectroscopy, Fourier transform infrared spectroscopy and ultraviolet–visible spectroscopy. The photocatalytic study of Nd–TiO2–GO nanocomposites was evaluated via the degradation of indigo carmine under simulated solar light. Results demonstrated that the photodegradation efficiency of indigo carmine solutions irradiated by solar simulated light for 3 h with the nanocomposites used as a catalyst reached a level of 92 % (0.6 % Nd). This high photocatalytic degradation of indigo carmine solutions by the Nd–TiO2–GO nanocomposites is ascribed to the spherical nanocrystalline size of TiO2. Graphical Abstract: [Figure not available: see fulltext.]

KW - Graphene oxide

KW - Indigo carmine, sol–gel

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KW - Photodegradation

KW - TiO, neodymium

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