Graphitic carbon nitride: Synthesis, characterization and photocatalytic decomposition of nitrous oxide

被引：143

作者：

Praus, Petr ^{[1
,2
]}

Svoboda, Ladislav ^{[1
,2
]}

Ritz, Michal ^{[2
]}

Troppova, Ivana ^{[1
]}

Sihor, Marcel ^{[1
]}

Koci, Kamila ^{[1
]}

机构：

[1] VSB Tech Univ Ostrava, Inst Environm Technol, 17 Listopadu 15-2172, Ostrava 70833, Czech Republic

[2] VSB Tech Univ Ostrava, Fac Met & Mat Engn, Dept Chem, 17 Listopadu 15-2172, Ostrava 70833, Czech Republic

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2017年 / 193卷

关键词：

Graphitic carbon nitride; Melamine; Exfoliation; Photocatalysis; Nitrous oxide; THERMAL CONDENSATION; ELECTRONIC-STRUCTURE; G-C3N4; NANOSHEETS; MELAMINE; TEMPERATURE; PERFORMANCE; REDUCTION; WATER;

D O I：

10.1016/j.matchemphys.2017.03.008

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Graphitic carbon nitride (g-C3N4) was synthetized by condensation of melamine at the temperatures of 400-700 degrees C in air for 2 h and resulting products were characterized and finally tested for the photocatalytic decomposition of nitrous oxide. The characterization methods were elemental analysis, UV-Vis diffuse reflectance spectroscopy (DRS), photoluminescence (PL), Fourier transform infrared (FTIR) and Raman spectroscopy, measurement of specific surface area (SSA), X-ray powder diffraction (XRD), scanning (SEM) and transmission (TEM) electron microscopy. The XRD patterns, FTIR and Raman spectra proved the presence of g-C3N4 at above 550 degrees C but the optimal synthesis temperature of 600-650 degrees C was found. Under these conditions graphitic carbon nitride of the overall empirical composition of C6N9H2 was formed. At lower temperatures g-C3N4 with a higher content of hydrogen was formed but at higher temperatures g-C3N4 was decomposed. At the temperatures above 650 degrees C, its exfoliation was observed. The photocatalytic experiments showed that the activity of all the samples synthetized at 400-700 degrees C was very similar, that is, within the range of experimental error (5 %). The total conversion of N2O reached about 43 % after 14 h.(C) 2017 Elsevier B.V. All rights reserved.

引用

页码：438 / 446

页数：9

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