High-yield synthesis and optical properties of g-C₃N₄
Yuan, Yanwen (Nanyang Technological University. Division of Physics and Applied Physics)
Zhang, Lulu (Nanyang Technological University. Division of Physics and Applied Physics)
Xing, Jun (Nanyang Technological University. Division of Physics and Applied Physics)
Utama, M. Iqbal Bakti (Nanyang Technological University. Division of Physics and Applied Physics)
Lu, Xin (Nanyang Technological University. Division of Physics and Applied Physics)
Du, Kezhao (Nanyang Technological University. Division of Physics and Applied Physics)
Li, Yongmei (Nanyang Technological University. School of Materials Science and Engineering)
Hu, Xiao (Nanyang Technological University. School of Materials Science and Engineering)
Wang, Shijie (Institute of Materials Research & Engineering, Agency for Science, Technologies and Research (Singapore))
Genç, Aziz (Institut Català de Nanociència i Nanotecnologia)
Dunin-Borkowski, Rafal E (Forschungszentrum Jülich - Peter Grünberg Institut)
Arbiol i Cobos, Jordi (Institut Català de Nanociència i Nanotecnologia)
Xiong, Qihua (Nanyang Technological University. Division of Physics and Applied Physics)

Data:	2015
Resum:	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-g-C₃N₄ are demonstrated. A systematic optical study of g-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.
Ajuts:	European Commission 312483
Drets:	Tots els drets reservats.
Llengua:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Matèria:	Chemical compositions ; Environmental improvements ; Graphitic carbon nitrides ; Infrared and Raman spectroscopy ; Optical phonon behavior ; Photocatalytic performance ; Photocatalytic property ; Scanning transmission electron microscopy
Publicat a:	Nanoscale, Vol. 7 Núm. 29 (july 2015) , p. 12343-12350, ISSN 2040-3372

DOI: 10.1039/c5nr02905h

Postprint 9 p, 3.3 MB

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