Synthesis of Colloidal Silicon Quantum Dot from Rice Husk Ash
This article describes the synthesis procedure of colloidal silicon quantum dot (Si QDs) from rice husk ash. The silicon quantum dots were capped with 1-octadecene by thermal hydrosilylation under argon gas to obtain octadecyl-Si QDs (ODE-Si QDs). The size separation of ODE-Si QDs was examined by th...
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2021/6689590 |
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| author | Thu-Huong Le Dang Thi Thanh Le Nguyen Van Tung |
| author_facet | Thu-Huong Le Dang Thi Thanh Le Nguyen Van Tung |
| author_sort | Thu-Huong Le |
| collection | DOAJ |
| description | This article describes the synthesis procedure of colloidal silicon quantum dot (Si QDs) from rice husk ash. The silicon quantum dots were capped with 1-octadecene by thermal hydrosilylation under argon gas to obtain octadecyl-Si QDs (ODE-Si QDs). The size separation of ODE-Si QDs was examined by the column chromatography method, which used silica gel (40–63 μm) as the stationary phase. Finally, we obtained two fractions of silicon quantum dot, exhibiting blue emission (B-Si QDs) with an average size of 2.5 ± 0.73 nm and red emission (R-Si QDs) with an average size of 5.1 ± 0.68 nm under a UV lamp (365 nm). The PL spectra of B-Si QDs and R-Si QDs samples show maximum peak energy at 410 nm (3.02 eV) and 700 nm (1.77 eV), respectively, while the quantum yield of Si QDs decreases from 5.8 to 34.6% when the average size decreases from 2.5 nm to 5.1 nm. The above results of PL emission spectroscopy and UV-vis absorption show quantum confined effect in Si QDs. |
| format | Article |
| id | doaj-art-43b00f91e8ee4021891e57a1631cc832 |
| institution | Kabale University |
| issn | 2090-9063 2090-9071 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Chemistry |
| spelling | doaj-art-43b00f91e8ee4021891e57a1631cc8322025-02-03T01:20:31ZengWileyJournal of Chemistry2090-90632090-90712021-01-01202110.1155/2021/66895906689590Synthesis of Colloidal Silicon Quantum Dot from Rice Husk AshThu-Huong Le0Dang Thi Thanh Le1Nguyen Van Tung2Faculty of Chemistry and Environment, Thuyloi University, Ha Noi 100000, VietnamFaculty of Chemistry and Environment, Thuyloi University, Ha Noi 100000, VietnamInstitute for Technology of Radioactive and Rare Elements, Ha Noi 100000, VietnamThis article describes the synthesis procedure of colloidal silicon quantum dot (Si QDs) from rice husk ash. The silicon quantum dots were capped with 1-octadecene by thermal hydrosilylation under argon gas to obtain octadecyl-Si QDs (ODE-Si QDs). The size separation of ODE-Si QDs was examined by the column chromatography method, which used silica gel (40–63 μm) as the stationary phase. Finally, we obtained two fractions of silicon quantum dot, exhibiting blue emission (B-Si QDs) with an average size of 2.5 ± 0.73 nm and red emission (R-Si QDs) with an average size of 5.1 ± 0.68 nm under a UV lamp (365 nm). The PL spectra of B-Si QDs and R-Si QDs samples show maximum peak energy at 410 nm (3.02 eV) and 700 nm (1.77 eV), respectively, while the quantum yield of Si QDs decreases from 5.8 to 34.6% when the average size decreases from 2.5 nm to 5.1 nm. The above results of PL emission spectroscopy and UV-vis absorption show quantum confined effect in Si QDs.http://dx.doi.org/10.1155/2021/6689590 |
| spellingShingle | Thu-Huong Le Dang Thi Thanh Le Nguyen Van Tung Synthesis of Colloidal Silicon Quantum Dot from Rice Husk Ash Journal of Chemistry |
| title | Synthesis of Colloidal Silicon Quantum Dot from Rice Husk Ash |
| title_full | Synthesis of Colloidal Silicon Quantum Dot from Rice Husk Ash |
| title_fullStr | Synthesis of Colloidal Silicon Quantum Dot from Rice Husk Ash |
| title_full_unstemmed | Synthesis of Colloidal Silicon Quantum Dot from Rice Husk Ash |
| title_short | Synthesis of Colloidal Silicon Quantum Dot from Rice Husk Ash |
| title_sort | synthesis of colloidal silicon quantum dot from rice husk ash |
| url | http://dx.doi.org/10.1155/2021/6689590 |
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