Preparation of CdO Rhombus-like Nanostructure and Its Photocatalytic Degradation of Azo Dyes from Aqueous Solution
In this work, a special rhombus-like structure of CdO composed of particles at the nanometre scale was successfully synthesized for the first time. A facile hydrothermal process with a post-reaction calcination was employed to prepare this nanomaterial. Scanning electron microscopy (SEM) images show...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2014-05-01
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| Series: | Nanomaterials and Nanotechnology |
| Subjects: | |
| Online Access: | http://www.intechopen.com/journals/nanomaterials_and_nanotechnology/preparation-of-cdo-rhombus-like-nanostructure-and-its-photocatalytic-degradation-of-azo-dyes-from-aq |
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| Summary: | In this work, a special rhombus-like structure of
CdO composed of particles at the nanometre scale was
successfully synthesized for the first time. A facile
hydrothermal process with a post-reaction calcination
was employed to prepare this nanomaterial. Scanning
electron microscopy (SEM) images showed that the
obtained rhombus-like structure consists of nanoparticles
with an average size of 29 nm. The band gap energy of 1.9
eV based on a diffuse reflectance spectroscopy (DRS)
showed that the product can be favourable to
photoactivity in the visible region of sunlight. The
prepared sample was employed to destruct carcinogenic
azo dyes, such as Congo Red (CR), Malachite Green (MG)
and Crystal Violet (CV). The obtained results showed that
the CdO with the special morphology was able to
effectively catalyse the degradation of these pollutants.
The related decolourization efficiencies were obtained by
up to 100% after various lengths of time of light
irradiation. It was concluded that the photodegradation
of the mentioned organic dyes under visible light
irradiation by a CdO rhombus-like nanostructure follows
the first-order reaction kinetics. The effect of the initial
pH and contact time on the percentage of the
decolourization of these organic dyes was also studied. |
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| ISSN: | 1847-9804 |