Dual phototransformation of the pollutants methyl orange and Cr (VI) using phthalocyanine-cobalt ferrite based magnetic nanocomposites
Bifunctional nanocomposites based on zinc phthalocyanines and glutathione capped CoFe2O4 magnetic nanoparticles (GSH-CoFe2O4 MNPs) are applied in a binary system wherein simultaneous photooxidation of methyl orange (MO) and photoreduction of Cr (VI) are conducted. The photoactivity of two zinc Pcs w...
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| Format: | Article |
| Language: | English |
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Elsevier
2019-04-01
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| Series: | Heliyon |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2405844018352174 |
| _version_ | 1819205770314514432 |
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| author | Sivuyisiwe Mapukata Olawale L. Osifeko Tebello Nyokong |
| author_facet | Sivuyisiwe Mapukata Olawale L. Osifeko Tebello Nyokong |
| author_sort | Sivuyisiwe Mapukata |
| collection | DOAJ |
| description | Bifunctional nanocomposites based on zinc phthalocyanines and glutathione capped CoFe2O4 magnetic nanoparticles (GSH-CoFe2O4 MNPs) are applied in a binary system wherein simultaneous photooxidation of methyl orange (MO) and photoreduction of Cr (VI) are conducted. The photoactivity of two zinc Pcs with different functional moieties are compared based on their interactions with GSH-CoFe2O4 MNPs. Conjugation of the Pcs to the GSH-CoFe2O4 MNPs not only enhanced their singlet oxygen production but also their photocatalytic activity in both photooxidation and photoreduction experiments. Using electron paramagnetic resonance (EPR) spectroscopy, the Pc-MNP conjugates reported herein were found to exhibit superparamagnetic behaviour, giving the advantage of easy separation using an external magnetic field post application, an attractive attribute for heterogeneous catalysis. The catalysts reported herein are therefore good candidates as catalysts for real life water purification analyses as they facilitate the treatment of both organic and inorganic water pollutants. |
| first_indexed | 2024-12-23T04:56:59Z |
| format | Article |
| id | doaj.art-e5badde65ef0465cb9db5a5862ce27f1 |
| institution | Directory Open Access Journal |
| issn | 2405-8440 |
| language | English |
| last_indexed | 2024-12-23T04:56:59Z |
| publishDate | 2019-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Heliyon |
| spelling | doaj.art-e5badde65ef0465cb9db5a5862ce27f12022-12-21T17:59:20ZengElsevierHeliyon2405-84402019-04-0154e01509Dual phototransformation of the pollutants methyl orange and Cr (VI) using phthalocyanine-cobalt ferrite based magnetic nanocompositesSivuyisiwe Mapukata0Olawale L. Osifeko1Tebello Nyokong2Centre for Nanotechnology Innovation, Department of Chemistry, Rhodes University, Grahamstown 6140, South AfricaCentre for Nanotechnology Innovation, Department of Chemistry, Rhodes University, Grahamstown 6140, South AfricaCorresponding author.; Centre for Nanotechnology Innovation, Department of Chemistry, Rhodes University, Grahamstown 6140, South AfricaBifunctional nanocomposites based on zinc phthalocyanines and glutathione capped CoFe2O4 magnetic nanoparticles (GSH-CoFe2O4 MNPs) are applied in a binary system wherein simultaneous photooxidation of methyl orange (MO) and photoreduction of Cr (VI) are conducted. The photoactivity of two zinc Pcs with different functional moieties are compared based on their interactions with GSH-CoFe2O4 MNPs. Conjugation of the Pcs to the GSH-CoFe2O4 MNPs not only enhanced their singlet oxygen production but also their photocatalytic activity in both photooxidation and photoreduction experiments. Using electron paramagnetic resonance (EPR) spectroscopy, the Pc-MNP conjugates reported herein were found to exhibit superparamagnetic behaviour, giving the advantage of easy separation using an external magnetic field post application, an attractive attribute for heterogeneous catalysis. The catalysts reported herein are therefore good candidates as catalysts for real life water purification analyses as they facilitate the treatment of both organic and inorganic water pollutants.http://www.sciencedirect.com/science/article/pii/S2405844018352174Materials chemistry |
| spellingShingle | Sivuyisiwe Mapukata Olawale L. Osifeko Tebello Nyokong Dual phototransformation of the pollutants methyl orange and Cr (VI) using phthalocyanine-cobalt ferrite based magnetic nanocomposites Heliyon Materials chemistry |
| title | Dual phototransformation of the pollutants methyl orange and Cr (VI) using phthalocyanine-cobalt ferrite based magnetic nanocomposites |
| title_full | Dual phototransformation of the pollutants methyl orange and Cr (VI) using phthalocyanine-cobalt ferrite based magnetic nanocomposites |
| title_fullStr | Dual phototransformation of the pollutants methyl orange and Cr (VI) using phthalocyanine-cobalt ferrite based magnetic nanocomposites |
| title_full_unstemmed | Dual phototransformation of the pollutants methyl orange and Cr (VI) using phthalocyanine-cobalt ferrite based magnetic nanocomposites |
| title_short | Dual phototransformation of the pollutants methyl orange and Cr (VI) using phthalocyanine-cobalt ferrite based magnetic nanocomposites |
| title_sort | dual phototransformation of the pollutants methyl orange and cr vi using phthalocyanine cobalt ferrite based magnetic nanocomposites |
| topic | Materials chemistry |
| url | http://www.sciencedirect.com/science/article/pii/S2405844018352174 |
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