Sustainable Preparation of Graphene Quantum Dots for Metal Ion Sensing Application
Over the past several years, graphene quantum dots (GQDs) have been extensively studied in water treatment and sensing applications because of their exceptional structure-related properties, intrinsic inert carbon property, eco-friendly nature, etc. This work reported on the preparation of GQDs from...
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| Format: | Article |
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MDPI AG
2022-12-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/13/1/148 |
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| author | Asif Saud Haleema Saleem Nazmin Munira Arqam Azad Shahab Hammadur Rahman Siddiqui Syed Javaid Zaidi |
| author_facet | Asif Saud Haleema Saleem Nazmin Munira Arqam Azad Shahab Hammadur Rahman Siddiqui Syed Javaid Zaidi |
| author_sort | Asif Saud |
| collection | DOAJ |
| description | Over the past several years, graphene quantum dots (GQDs) have been extensively studied in water treatment and sensing applications because of their exceptional structure-related properties, intrinsic inert carbon property, eco-friendly nature, etc. This work reported on the preparation of GQDs from the ethanolic extracts of eucalyptus tree leaves by a hydrothermal treatment technique. Different heat treatment times and temperatures were used during the hydrothermal treatment technique. The optical, morphological, and compositional analyses of the green-synthesized GQDs were carried out. It can be noted that the product yield of GQDs showed the maximum yield at a reaction temperature of 300 °C. Further, it was noted that at a treatment period of 480 min, the greatest product yield of about 44.34% was attained. The quantum yields of prepared GQDs obtained after 480 min of treatment at 300 °C (named as GQD/300) were noted to be 0.069. Moreover, the D/G ratio of GQD/300 was noted to be 0.532 and this suggested that the GQD/300 developed has a nano-crystalline graphite structure. The TEM images demonstrated the development of GQD/300 with sizes between 2.0 to 5.0 nm. Furthermore, it was noted that the GQD/300 can detect Fe<sup>3+</sup> in a very selective manner, and hence the developed GQD/300 was successfully used for the metal ion sensing application. |
| first_indexed | 2024-03-09T09:44:07Z |
| format | Article |
| id | doaj.art-d5c686bbac5c4d0fbbe936e1d7da9e65 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T09:44:07Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-d5c686bbac5c4d0fbbe936e1d7da9e652023-12-02T00:44:48ZengMDPI AGNanomaterials2079-49912022-12-0113114810.3390/nano13010148Sustainable Preparation of Graphene Quantum Dots for Metal Ion Sensing ApplicationAsif Saud0Haleema Saleem1Nazmin Munira2Arqam Azad Shahab3Hammadur Rahman Siddiqui4Syed Javaid Zaidi5UNESCO Chair on Desalination and Water Treatment, Center for Advanced Materials, Qatar University, Doha P.O. Box 2713, QatarUNESCO Chair on Desalination and Water Treatment, Center for Advanced Materials, Qatar University, Doha P.O. Box 2713, QatarUNESCO Chair on Desalination and Water Treatment, Center for Advanced Materials, Qatar University, Doha P.O. Box 2713, QatarUNESCO Chair on Desalination and Water Treatment, Center for Advanced Materials, Qatar University, Doha P.O. Box 2713, QatarUNESCO Chair on Desalination and Water Treatment, Center for Advanced Materials, Qatar University, Doha P.O. Box 2713, QatarUNESCO Chair on Desalination and Water Treatment, Center for Advanced Materials, Qatar University, Doha P.O. Box 2713, QatarOver the past several years, graphene quantum dots (GQDs) have been extensively studied in water treatment and sensing applications because of their exceptional structure-related properties, intrinsic inert carbon property, eco-friendly nature, etc. This work reported on the preparation of GQDs from the ethanolic extracts of eucalyptus tree leaves by a hydrothermal treatment technique. Different heat treatment times and temperatures were used during the hydrothermal treatment technique. The optical, morphological, and compositional analyses of the green-synthesized GQDs were carried out. It can be noted that the product yield of GQDs showed the maximum yield at a reaction temperature of 300 °C. Further, it was noted that at a treatment period of 480 min, the greatest product yield of about 44.34% was attained. The quantum yields of prepared GQDs obtained after 480 min of treatment at 300 °C (named as GQD/300) were noted to be 0.069. Moreover, the D/G ratio of GQD/300 was noted to be 0.532 and this suggested that the GQD/300 developed has a nano-crystalline graphite structure. The TEM images demonstrated the development of GQD/300 with sizes between 2.0 to 5.0 nm. Furthermore, it was noted that the GQD/300 can detect Fe<sup>3+</sup> in a very selective manner, and hence the developed GQD/300 was successfully used for the metal ion sensing application.https://www.mdpi.com/2079-4991/13/1/148graphene quantum dotseucalyptus treeshydrothermal treatmentleaf extractsphotoluminescencemetal sensing |
| spellingShingle | Asif Saud Haleema Saleem Nazmin Munira Arqam Azad Shahab Hammadur Rahman Siddiqui Syed Javaid Zaidi Sustainable Preparation of Graphene Quantum Dots for Metal Ion Sensing Application Nanomaterials graphene quantum dots eucalyptus trees hydrothermal treatment leaf extracts photoluminescence metal sensing |
| title | Sustainable Preparation of Graphene Quantum Dots for Metal Ion Sensing Application |
| title_full | Sustainable Preparation of Graphene Quantum Dots for Metal Ion Sensing Application |
| title_fullStr | Sustainable Preparation of Graphene Quantum Dots for Metal Ion Sensing Application |
| title_full_unstemmed | Sustainable Preparation of Graphene Quantum Dots for Metal Ion Sensing Application |
| title_short | Sustainable Preparation of Graphene Quantum Dots for Metal Ion Sensing Application |
| title_sort | sustainable preparation of graphene quantum dots for metal ion sensing application |
| topic | graphene quantum dots eucalyptus trees hydrothermal treatment leaf extracts photoluminescence metal sensing |
| url | https://www.mdpi.com/2079-4991/13/1/148 |
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