Optical properties of chitosan/hydroxyl-functionalized graphene quantum dots thin film for potential optical detection of ferric (III) ion
In this research, the preparation of chitosan and hydroxyl-functionalized graphene quantum dots (HGQDs) composite has been described. The spin coating technique was used to prepare the chitosan/hydroxyl-functionalized graphene quantum dots (Cs/HGQDs) thin film. The Cs/HGQDs thin film was then charac...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2019
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| Online Access: | http://psasir.upm.edu.my/id/eprint/81556/ http://psasir.upm.edu.my/id/eprint/81556/1/Optical%20properties%20of%20chitosan%20hydroxyl%20functionalized%20graphene%20quantum%20dots%20thin%20film%20for%20potential%20optical%20detection%20of%20ferric%20%28III%29%20ion.pdf |
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| author | Anas, Nur Ain Asyiqin Yap, Wing Fen Sheh Omar, Nur Alia Md Ramdzan, Nur Syahira Mohd Daniyal, Wan Mohd Ebtisyam Mustaqim Saleviter, Silvan Zainudin, Afiq Azri |
| author_facet | Anas, Nur Ain Asyiqin Yap, Wing Fen Sheh Omar, Nur Alia Md Ramdzan, Nur Syahira Mohd Daniyal, Wan Mohd Ebtisyam Mustaqim Saleviter, Silvan Zainudin, Afiq Azri |
| author_sort | Anas, Nur Ain Asyiqin |
| building | UPM Institutional Repository |
| collection | Online Access |
| description | In this research, the preparation of chitosan and hydroxyl-functionalized graphene quantum dots (HGQDs) composite has been described. The spin coating technique was used to prepare the chitosan/hydroxyl-functionalized graphene quantum dots (Cs/HGQDs) thin film. The Cs/HGQDs thin film was then characterized using the Fourier transform infrared spectroscopy which confirmed the existence of amino groups, carboxylic acid groups, carboxyl groups and hydroxyl groups in Cs/HGQDs. UV–Vis absorption spectroscopy and photoluminescence (PL) were used to study the optical properties of the thin film. The absorption of Cs/HGQDs thin film was high with optical band gap of 3.797 eV. The intensity of PL spectra of the thin film was observed around wavelength of 420 nm. The incorporation of Cs/HGQDs thin film with surface plasmon resonance spectroscopy produced positive responses towards the Fe³⁺ ion solutions of different concentration and it was found that Cs/HGQDs thin film able to detect Fe³⁺ as low as 0.5 ppm with a sensitivity of 0.11396° ppm⁻¹. Subsequently, Cs/HGQDs layer have high potential as sensing layer to detect Fe³⁺ due to high affinity of Fe³⁺ ion towards the thin film with a value of binding affinity constant, K equals to 5.79 ppm⁻¹. Atomic force microscopy was used to observe the surface morphology of the thin film and the result indicates that the thin film is relatively smooth and homogenous which also confirmed the interaction of Fe³⁺ with the thin film. Thus, Cs/HGQDs thin film shows potential for the detection of Fe³⁺ in solution. |
| first_indexed | 2025-11-15T12:24:30Z |
| format | Article |
| id | upm-81556 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-15T12:24:30Z |
| publishDate | 2019 |
| publisher | Elsevier |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-815562020-10-29T20:08:17Z http://psasir.upm.edu.my/id/eprint/81556/ Optical properties of chitosan/hydroxyl-functionalized graphene quantum dots thin film for potential optical detection of ferric (III) ion Anas, Nur Ain Asyiqin Yap, Wing Fen Sheh Omar, Nur Alia Md Ramdzan, Nur Syahira Mohd Daniyal, Wan Mohd Ebtisyam Mustaqim Saleviter, Silvan Zainudin, Afiq Azri In this research, the preparation of chitosan and hydroxyl-functionalized graphene quantum dots (HGQDs) composite has been described. The spin coating technique was used to prepare the chitosan/hydroxyl-functionalized graphene quantum dots (Cs/HGQDs) thin film. The Cs/HGQDs thin film was then characterized using the Fourier transform infrared spectroscopy which confirmed the existence of amino groups, carboxylic acid groups, carboxyl groups and hydroxyl groups in Cs/HGQDs. UV–Vis absorption spectroscopy and photoluminescence (PL) were used to study the optical properties of the thin film. The absorption of Cs/HGQDs thin film was high with optical band gap of 3.797 eV. The intensity of PL spectra of the thin film was observed around wavelength of 420 nm. The incorporation of Cs/HGQDs thin film with surface plasmon resonance spectroscopy produced positive responses towards the Fe³⁺ ion solutions of different concentration and it was found that Cs/HGQDs thin film able to detect Fe³⁺ as low as 0.5 ppm with a sensitivity of 0.11396° ppm⁻¹. Subsequently, Cs/HGQDs layer have high potential as sensing layer to detect Fe³⁺ due to high affinity of Fe³⁺ ion towards the thin film with a value of binding affinity constant, K equals to 5.79 ppm⁻¹. Atomic force microscopy was used to observe the surface morphology of the thin film and the result indicates that the thin film is relatively smooth and homogenous which also confirmed the interaction of Fe³⁺ with the thin film. Thus, Cs/HGQDs thin film shows potential for the detection of Fe³⁺ in solution. Elsevier 2019 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/81556/1/Optical%20properties%20of%20chitosan%20hydroxyl%20functionalized%20graphene%20quantum%20dots%20thin%20film%20for%20potential%20optical%20detection%20of%20ferric%20%28III%29%20ion.pdf Anas, Nur Ain Asyiqin and Yap, Wing Fen and Sheh Omar, Nur Alia and Md Ramdzan, Nur Syahira and Mohd Daniyal, Wan Mohd Ebtisyam Mustaqim and Saleviter, Silvan and Zainudin, Afiq Azri (2019) Optical properties of chitosan/hydroxyl-functionalized graphene quantum dots thin film for potential optical detection of ferric (III) ion. Optics and Laser Technology, 120. art. no. 105724. pp. 1-8. ISSN 0030-3992 https://www.sciencedirect.com/science/article/abs/pii/S0030399218313239 10.1016/j.optlastec.2019.105724 |
| spellingShingle | Anas, Nur Ain Asyiqin Yap, Wing Fen Sheh Omar, Nur Alia Md Ramdzan, Nur Syahira Mohd Daniyal, Wan Mohd Ebtisyam Mustaqim Saleviter, Silvan Zainudin, Afiq Azri Optical properties of chitosan/hydroxyl-functionalized graphene quantum dots thin film for potential optical detection of ferric (III) ion |
| title | Optical properties of chitosan/hydroxyl-functionalized graphene quantum dots thin film for potential optical detection of ferric (III) ion |
| title_full | Optical properties of chitosan/hydroxyl-functionalized graphene quantum dots thin film for potential optical detection of ferric (III) ion |
| title_fullStr | Optical properties of chitosan/hydroxyl-functionalized graphene quantum dots thin film for potential optical detection of ferric (III) ion |
| title_full_unstemmed | Optical properties of chitosan/hydroxyl-functionalized graphene quantum dots thin film for potential optical detection of ferric (III) ion |
| title_short | Optical properties of chitosan/hydroxyl-functionalized graphene quantum dots thin film for potential optical detection of ferric (III) ion |
| title_sort | optical properties of chitosan/hydroxyl-functionalized graphene quantum dots thin film for potential optical detection of ferric (iii) ion |
| url | http://psasir.upm.edu.my/id/eprint/81556/ http://psasir.upm.edu.my/id/eprint/81556/ http://psasir.upm.edu.my/id/eprint/81556/ http://psasir.upm.edu.my/id/eprint/81556/1/Optical%20properties%20of%20chitosan%20hydroxyl%20functionalized%20graphene%20quantum%20dots%20thin%20film%20for%20potential%20optical%20detection%20of%20ferric%20%28III%29%20ion.pdf |