Synthesis of Graphene Quantum Dots Coupled to Au Nanoparticles: A Facile and Versatile Route Using Different Carbon Sources
A top-down synthesis of graphene quantum dots (GQD) was carried out by hydrothermal method from different carbon sources (graphene, multi-walled carbon nanotubes, and black carbon) and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline">&...
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| Format: | Article |
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MDPI AG
2023-04-01
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| Online Access: | https://www.mdpi.com/2311-5629/9/2/45 |
| _version_ | 1797406317488373760 |
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| author | David Ibarra Oxana Kharissova Idalia Gomez |
| author_facet | David Ibarra Oxana Kharissova Idalia Gomez |
| author_sort | David Ibarra |
| collection | DOAJ |
| description | A top-down synthesis of graphene quantum dots (GQD) was carried out by hydrothermal method from different carbon sources (graphene, multi-walled carbon nanotubes, and black carbon) and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi mathvariant="normal">H</mi><mn>2</mn></msub><msub><mi mathvariant="normal">O</mi><mn>2</mn></msub></mrow></semantics></math></inline-formula> as an oxidizing agent, with an N source added in the reaction to modify the chemical surface of the GQD, giving rise to the nanomaterial N-GQD. The modified chemical surface of N-GQD partially allowed the nucleation and coupling of gold nanoparticles from a <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi mathvariant="normal">H</mi><mi mathvariant="normal">A</mi><mi mathvariant="normal">u</mi><mi mathvariant="normal">C</mi><msub><mi mathvariant="normal">l</mi><mn>4</mn></msub></mrow></semantics></math></inline-formula> solution. The X-ray diffraction spectrogram confirms the amorphization of the precursor materials, while the functionalized surface of N-GQD was characterized through UV-Vis, Fourier transform infrared, and photoluminescense spectrometry; TEM and FE-SEM show particle sizes between 8 and 15 nm. N-GQD@AuNP presence can be confirmed by UV-Vis spectroscopy and TEM analysis, showing partial coupling and nanoparticle nucleation of Au in the structure with particle sizes between 20 and 40 nm. |
| first_indexed | 2024-03-09T03:23:42Z |
| format | Article |
| id | doaj.art-9deea915d94d41d88c2e0d1038e20c51 |
| institution | Directory Open Access Journal |
| issn | 2311-5629 |
| language | English |
| last_indexed | 2024-03-09T03:23:42Z |
| publishDate | 2023-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | C |
| spelling | doaj.art-9deea915d94d41d88c2e0d1038e20c512023-12-03T15:05:12ZengMDPI AGC2311-56292023-04-01924510.3390/c9020045Synthesis of Graphene Quantum Dots Coupled to Au Nanoparticles: A Facile and Versatile Route Using Different Carbon SourcesDavid Ibarra0Oxana Kharissova1Idalia Gomez2Facultad de Ciencias Químicas, Universidad Autónoma de Nuevo León, Mexico CP 66455, MexicoFacultad de Ciencias de Físico-Matemáticas, Universidad Aútonoma de Nuevo León, Mexico CP 66451, MexicoFacultad de Ciencias Químicas, Universidad Autónoma de Nuevo León, Mexico CP 66455, MexicoA top-down synthesis of graphene quantum dots (GQD) was carried out by hydrothermal method from different carbon sources (graphene, multi-walled carbon nanotubes, and black carbon) and <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><msub><mi mathvariant="normal">H</mi><mn>2</mn></msub><msub><mi mathvariant="normal">O</mi><mn>2</mn></msub></mrow></semantics></math></inline-formula> as an oxidizing agent, with an N source added in the reaction to modify the chemical surface of the GQD, giving rise to the nanomaterial N-GQD. The modified chemical surface of N-GQD partially allowed the nucleation and coupling of gold nanoparticles from a <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi mathvariant="normal">H</mi><mi mathvariant="normal">A</mi><mi mathvariant="normal">u</mi><mi mathvariant="normal">C</mi><msub><mi mathvariant="normal">l</mi><mn>4</mn></msub></mrow></semantics></math></inline-formula> solution. The X-ray diffraction spectrogram confirms the amorphization of the precursor materials, while the functionalized surface of N-GQD was characterized through UV-Vis, Fourier transform infrared, and photoluminescense spectrometry; TEM and FE-SEM show particle sizes between 8 and 15 nm. N-GQD@AuNP presence can be confirmed by UV-Vis spectroscopy and TEM analysis, showing partial coupling and nanoparticle nucleation of Au in the structure with particle sizes between 20 and 40 nm.https://www.mdpi.com/2311-5629/9/2/45hydrothermalquantum dotsnanosensorscarbon nanoparticlestop-down |
| spellingShingle | David Ibarra Oxana Kharissova Idalia Gomez Synthesis of Graphene Quantum Dots Coupled to Au Nanoparticles: A Facile and Versatile Route Using Different Carbon Sources C hydrothermal quantum dots nanosensors carbon nanoparticles top-down |
| title | Synthesis of Graphene Quantum Dots Coupled to Au Nanoparticles: A Facile and Versatile Route Using Different Carbon Sources |
| title_full | Synthesis of Graphene Quantum Dots Coupled to Au Nanoparticles: A Facile and Versatile Route Using Different Carbon Sources |
| title_fullStr | Synthesis of Graphene Quantum Dots Coupled to Au Nanoparticles: A Facile and Versatile Route Using Different Carbon Sources |
| title_full_unstemmed | Synthesis of Graphene Quantum Dots Coupled to Au Nanoparticles: A Facile and Versatile Route Using Different Carbon Sources |
| title_short | Synthesis of Graphene Quantum Dots Coupled to Au Nanoparticles: A Facile and Versatile Route Using Different Carbon Sources |
| title_sort | synthesis of graphene quantum dots coupled to au nanoparticles a facile and versatile route using different carbon sources |
| topic | hydrothermal quantum dots nanosensors carbon nanoparticles top-down |
| url | https://www.mdpi.com/2311-5629/9/2/45 |
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