Heterogeneous Fenton-like surface properties of oxygenated graphitic carbon nitride

被引：23

作者：

Oliveira, Wanessa L. ^{[1
]}

Ferreira, Meiriele Antunes ^{[2
]}

Mourao, Henrique A. J. L. ^{[2
]}

Pires, Manoel J. M. ^{[2
]}

Ferreira, Vinicius ^{[3
]}

Gorgulho, Honoria F. ^{[3
]}

Cipriano, Daniel F. ^{[4
]}

Freitas, Jair C. C. ^{[4
]}

Mastelaro, Valmor R. ^{[5
]}

Nascimento, Otaciro R. ^{[5
]}

Ferreira, Dalva E. C. ^{[1
]}

Fioravante, Frederico Ramos ^{[1
]}

Pereira, Marcio C. ^{[6
]}

de Mesquita, Joao P. ^{[1
]}

机构：

[1] Univ Fed Vales Jequitinhonha & Mucuri, Dept Quim, Rodovia MGT 367 Km 583,5000, BR-39100000 Diamantina, MG, Brazil

[2] Univ Fed Vales Jequitinhonha & Mucuri, Inst Ciencia & Tecnol, Rodovia MGT 367 Km 583,5000, BR-39100000 Diamantina, MG, Brazil

[3] Univ Fed Sao Joao del Rei, Dept Ciencias Nat, Praca Dom Helvecio 74, BR-36301160 Sao Joao Del Rei, MG, Brazil

[4] Univ Fed Espirito Santo, Lab Carbon & Ceram Mat, Dept Phys, Ave Fernando Ferrari,514 Goiabeiras, BR-29075910 Vitoria, ES, Brazil

[5] Univ Sao Paulo, Inst Fis Sao Carlos, Ave Trabalhador Sao Carlense, BR-13566590 Sao Carlos, SP, Brazil

[6] Univ Fed Vales Jequitinhonha & Mucuri, Inst Ciencia Engn & Tecnol, BR-39803371 Teofilo Otoni, MG, Brazil

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2021年 / 587卷

关键词：

Graphitic carbon nitride; Oxygenated functional groups; Fenton-like reaction; RAY PHOTOELECTRON-SPECTROSCOPY; VISIBLE-LIGHT IRRADIATION; REDUCED GRAPHENE OXIDE; METAL-FREE ACTIVATION; POROUS G-C3N4; FREE CATALYST; DOPED G-C3N4; EFFICIENT; PHOTOCATALYSIS; DEGRADATION;

D O I：

10.1016/j.jcis.2020.12.031

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The photo-Fenton activity of graphitic carbon nitride (g-C3N4) has been widely studied, nevertheless, its Fenton-like catalytic behavior in the dark has not yet been demonstrated. In the present work, it is shown that oxygenated g-C3N4 obtained at different temperatures (500-600 degrees C) can degrade indigo carmine with hydrogen peroxide in the dark by a reaction similar to a conventional Fenton's reaction. Based on an extensive characterization of g-C3N4, we conclude that Fenton-like activity is directly related to the oxygenated functional groups on g-C3N4 structure, mainly by -OH functional groups. Oxygenated functional groups (e.g., hydroquinone-like groups) can reduce the H2O2 and generate oxidizing hydroxyl radicals, just like in the Fenton reaction performed by metals. In addition to new information on g-C3N4 surface reactivity revealed by this study, the metal-free oxygenated g-C3N4 catalyst may be an alternative to traditional metal catalysts used in Fenton-like reactions for advanced oxidation. (c) 2020 Elsevier Inc. All rights reserved.

引用

页码：479 / 488

页数：10

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