High-yield synthesis and optical properties of g-C3N4
Graphitic carbon nitride (g-C3N4), a metal-free semiconductor with a band gap of 2.7 eV, has received considerable attention owing to its fascinating photocatalytic performances under visible-light. g-C3N4 exhibits high thermal and chemical stability and non-toxicity such that it has been considered...
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sg-ntu-dr.10356-828672023-02-28T19:21:29Z High-yield synthesis and optical properties of g-C3N4 Yuan, Yanwen Zhang, Lulu Xing, Jun Utama, M. Iqbal Bakti Lu, Xin Du, Kezhao Li, Yongmei Hu, Xiao Wang, Shijie Genç, Aziz Dunin-Borkowski, Rafal Arbiol, Jordi Xiong, Qihua School of Electrical and Electronic Engineering School of Materials Science & Engineering School of Physical and Mathematical Sciences Electron microscopy Photocatalytic performance Graphitic carbon nitride (g-C3N4), a metal-free semiconductor with a band gap of 2.7 eV, has received considerable attention owing to its fascinating photocatalytic performances under visible-light. g-C3N4 exhibits high thermal and chemical stability and non-toxicity such that it has been considered as the most promising photocatalyst for environmental improvement and energy conservation. Hence, it is of great importance to obtain high-quality g-C3N4 and gain a clear understanding of its optical properties. Herein, we report a high-yield synthesis of g-C3N4 products via heating of high vacuum-sealed melamine powder in an ampoule at temperatures between 450 and 650 °C. Using transmission electron microscopy (TEM), scanning transmission electron microscopy (STEM), electron energy loss spectroscopy (EELS), thermogravimetric analysis (TGA), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS), the chemical composition and crystallization of the as-produced g-C3N4 are demonstrated. A systematic optical study of g-C3N4 is carried out with several approaches. The optical phonon behavior of g-C3N4 is revealed by infrared and Raman spectroscopy, and the emission properties of g-C3N4 are investigated using photoluminescence (PL) spectroscopy, while the photocatalytic properties are explored by the photodegradation experiment. NRF (Natl Research Foundation, S’pore) MOE (Min. of Education, S’pore) Accepted version 2016-03-31T07:32:31Z 2019-12-06T15:07:14Z 2016-03-31T07:32:31Z 2019-12-06T15:07:14Z 2015 Journal Article Yuan, Y., Zhang, L., Xing, J., Utama, M. I. B., Lu, X., Du, K., et al. (2015). High-yield synthesis and optical properties of g-C3N4. Nanoscale, 7(29), 12343-12350. https://hdl.handle.net/10356/82867 http://hdl.handle.net/10220/40351 10.1039/C5NR02905H en Nanoscale © 2015 The Royal Society of Chemistry. This is the author created version of a work that has been peer reviewed and accepted for publication by Nanoscale, The Royal Society of Chemistry. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [http://dx.doi.org/10.1039/C5NR02905H]. 7 p. application/pdf |
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Electron microscopy Photocatalytic performance Yuan, Yanwen Zhang, Lulu Xing, Jun Utama, M. Iqbal Bakti Lu, Xin Du, Kezhao Li, Yongmei Hu, Xiao Wang, Shijie Genç, Aziz Dunin-Borkowski, Rafal Arbiol, Jordi Xiong, Qihua High-yield synthesis and optical properties of g-C3N4 |
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Graphitic carbon nitride (g-C3N4), a metal-free semiconductor with a band gap of 2.7 eV, has received considerable attention owing to its fascinating photocatalytic performances under visible-light. g-C3N4 exhibits high thermal and chemical stability and non-toxicity such that it has been considered as the most promising photocatalyst for environmental improvement and energy conservation. Hence, it is of great importance to obtain high-quality g-C3N4 and gain a clear understanding of its optical properties. Herein, we report a high-yield synthesis of g-C3N4 products via heating of high vacuum-sealed melamine powder in an ampoule at temperatures between 450 and 650 °C. Using transmission electron microscopy (TEM), scanning transmission electron microscopy (STEM), electron energy loss spectroscopy (EELS), thermogravimetric analysis (TGA), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS), the chemical composition and crystallization of the as-produced g-C3N4 are demonstrated. A systematic optical study of g-C3N4 is carried out with several approaches. The optical phonon behavior of g-C3N4 is revealed by infrared and Raman spectroscopy, and the emission properties of g-C3N4 are investigated using photoluminescence (PL) spectroscopy, while the photocatalytic properties are explored by the photodegradation experiment. |
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School of Electrical and Electronic Engineering |
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School of Electrical and Electronic Engineering Yuan, Yanwen Zhang, Lulu Xing, Jun Utama, M. Iqbal Bakti Lu, Xin Du, Kezhao Li, Yongmei Hu, Xiao Wang, Shijie Genç, Aziz Dunin-Borkowski, Rafal Arbiol, Jordi Xiong, Qihua |
format |
Article |
author |
Yuan, Yanwen Zhang, Lulu Xing, Jun Utama, M. Iqbal Bakti Lu, Xin Du, Kezhao Li, Yongmei Hu, Xiao Wang, Shijie Genç, Aziz Dunin-Borkowski, Rafal Arbiol, Jordi Xiong, Qihua |
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Yuan, Yanwen |
title |
High-yield synthesis and optical properties of g-C3N4 |
title_short |
High-yield synthesis and optical properties of g-C3N4 |
title_full |
High-yield synthesis and optical properties of g-C3N4 |
title_fullStr |
High-yield synthesis and optical properties of g-C3N4 |
title_full_unstemmed |
High-yield synthesis and optical properties of g-C3N4 |
title_sort |
high-yield synthesis and optical properties of g-c3n4 |
publishDate |
2016 |
url |
https://hdl.handle.net/10356/82867 http://hdl.handle.net/10220/40351 |
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1759856837532844032 |