On the assessment of photocatalytic activity and charge carrier mechanism of TiO2@SnO2 core-shell nanoparticles for water decontamination

A. Farhadi; M. R. Mohammadi; M. Ghorbani

doi:10.1016/j.jphotochem.2017.02.009

On the assessment of photocatalytic activity and charge carrier mechanism of TiO₂@SnO₂ core-shell nanoparticles for water decontamination

A. Farhadi, M. R. Mohammadi (Lead / Corresponding author), M. Ghorbani

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

48 Citations (Scopus)

Abstract

We synthesize TiO₂@SnO₂ core-shell nanoparticles (NPs) by a facile two-step aqueous sol-gel method and their photocatalytic activity is compared with the pure TiO₂ and SnO₂ NPs for degradation of methylene blue under UV irradiation. The chemical property, crystal structure and morphology of the synthesized samples are studied by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Field emission scanning electron microscopy (FE-SEM) and transmission electron microscope (TEM) techniques. The mechanisms of electron–hole recombination and separation of charge carriers are studied by photoluminescence (PL) and diffuse reflectance spectroscopy (DRS). Furthermore, the kinetics study of photocatalytic degradation of dye methylene blue is carried out based on Langmuir-Hinshelwood model. The remarkable enhancement in photocatalytic activity of the core-shell nanoparticle compared to its constituents is attributed to the lower recombination rate of charge carriers in the core-shell heterostructure.

Original language	English
Pages (from-to)	171-177
Number of pages	7
Journal	Journal of Photochemistry and Photobiology A: Chemistry
Volume	338
Early online date	14 Feb 2017
DOIs	https://doi.org/10.1016/j.jphotochem.2017.02.009
Publication status	Published - 1 Apr 2017

Keywords

Electron–hole recombination
Kinetics study
Photocatalytic activity
Separation of charge carriers
TiO@SnO core-shell nanoparticles

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering
General Physics and Astronomy

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Cite this

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title = "On the assessment of photocatalytic activity and charge carrier mechanism of TiO2@SnO2 core-shell nanoparticles for water decontamination",

abstract = "We synthesize TiO2@SnO2 core-shell nanoparticles (NPs) by a facile two-step aqueous sol-gel method and their photocatalytic activity is compared with the pure TiO2 and SnO2 NPs for degradation of methylene blue under UV irradiation. The chemical property, crystal structure and morphology of the synthesized samples are studied by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Field emission scanning electron microscopy (FE-SEM) and transmission electron microscope (TEM) techniques. The mechanisms of electron–hole recombination and separation of charge carriers are studied by photoluminescence (PL) and diffuse reflectance spectroscopy (DRS). Furthermore, the kinetics study of photocatalytic degradation of dye methylene blue is carried out based on Langmuir-Hinshelwood model. The remarkable enhancement in photocatalytic activity of the core-shell nanoparticle compared to its constituents is attributed to the lower recombination rate of charge carriers in the core-shell heterostructure.",

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On the assessment of photocatalytic activity and charge carrier mechanism of TiO₂@SnO₂ core-shell nanoparticles for water decontamination. / Farhadi, A.; Mohammadi, M. R. (Lead / Corresponding author); Ghorbani, M.
In: Journal of Photochemistry and Photobiology A: Chemistry, Vol. 338, 01.04.2017, p. 171-177.

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

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N2 - We synthesize TiO2@SnO2 core-shell nanoparticles (NPs) by a facile two-step aqueous sol-gel method and their photocatalytic activity is compared with the pure TiO2 and SnO2 NPs for degradation of methylene blue under UV irradiation. The chemical property, crystal structure and morphology of the synthesized samples are studied by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Field emission scanning electron microscopy (FE-SEM) and transmission electron microscope (TEM) techniques. The mechanisms of electron–hole recombination and separation of charge carriers are studied by photoluminescence (PL) and diffuse reflectance spectroscopy (DRS). Furthermore, the kinetics study of photocatalytic degradation of dye methylene blue is carried out based on Langmuir-Hinshelwood model. The remarkable enhancement in photocatalytic activity of the core-shell nanoparticle compared to its constituents is attributed to the lower recombination rate of charge carriers in the core-shell heterostructure.

AB - We synthesize TiO2@SnO2 core-shell nanoparticles (NPs) by a facile two-step aqueous sol-gel method and their photocatalytic activity is compared with the pure TiO2 and SnO2 NPs for degradation of methylene blue under UV irradiation. The chemical property, crystal structure and morphology of the synthesized samples are studied by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), Field emission scanning electron microscopy (FE-SEM) and transmission electron microscope (TEM) techniques. The mechanisms of electron–hole recombination and separation of charge carriers are studied by photoluminescence (PL) and diffuse reflectance spectroscopy (DRS). Furthermore, the kinetics study of photocatalytic degradation of dye methylene blue is carried out based on Langmuir-Hinshelwood model. The remarkable enhancement in photocatalytic activity of the core-shell nanoparticle compared to its constituents is attributed to the lower recombination rate of charge carriers in the core-shell heterostructure.

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