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Title: High-yield synthesis and optical properties of g-C3N4
Authors: 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
Keywords: Electron microscopy
Photocatalytic performance
Issue Date: 2015
Source: 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.
Series/Report no.: Nanoscale
Abstract: 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.
DOI: 10.1039/C5NR02905H
Schools: School of Electrical and Electronic Engineering 
School of Materials Science & Engineering 
School of Physical and Mathematical Sciences 
Rights: © 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: [].
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EEE Journal Articles
MSE Journal Articles
SPMS Journal Articles

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