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Integration of nickel doping with loading on graphene for enhanced adsorptive and catalytic properties of CdS nanoparticles towards visible light degradation of some antibiotics.
- Source :
-
Journal of hazardous materials [J Hazard Mater] 2016 Dec 15; Vol. 320, pp. 304-314. Date of Electronic Publication: 2016 Aug 16. - Publication Year :
- 2016
-
Abstract
- Water dispersible, highly efficient nickel doped CdS nanoparticles anchored on graphene nanosheets as a photocatalyst for cephalexin and sulfamethoxazole photodegradation have been prepared in a facile microwave-furnace assisted method. Each one of the two modifications has played a critical role in nanocomposite functioning. Defects originated by dopant boosted the lifetime of carriers and thereupon graphene matrix transferred them to contribute effectively the photocatalytic process. Characterization results revealed the formation of monocrystalline hexagonal phase of all products and that both doping and loading on graphene have red-shifted the absorption edge of CdS towards the visible light region. Furthermore, FTIR confirmed the successful reduction of graphene oxide by the subsequent preparation steps. Adsorption isotherms revealed the role of graphene in enhancing substrate adsorption. Nevertheless, dissimilar pathways of catalytic degradation were observed on the doped composite as cephalexin oxidation was principally mediated by the hole-hydroxyl radical mechanism, sulfamethoxazole oxidation favored the superoxide radical mechanism. This composite has shown, however, a high photostability and minimized ions release of the composite.<br /> (Copyright © 2016 Elsevier B.V. All rights reserved.)
- Subjects :
- Anti-Bacterial Agents chemistry
Cadmium
Cephalexin chemistry
Cephalexin radiation effects
Environmental Pollutants chemistry
Environmental Pollutants radiation effects
Microwaves
Sulfamethoxazole chemistry
Sulfamethoxazole radiation effects
Sulfur
Anti-Bacterial Agents radiation effects
Graphite chemistry
Nanoparticles chemistry
Nickel chemistry
Photolysis
Subjects
Details
- Language :
- English
- ISSN :
- 1873-3336
- Volume :
- 320
- Database :
- MEDLINE
- Journal :
- Journal of hazardous materials
- Publication Type :
- Academic Journal
- Accession number :
- 27565855
- Full Text :
- https://doi.org/10.1016/j.jhazmat.2016.08.043