The utilization of Fe-doped g-C3N4in a heterogeneous photo-Fenton-like catalytic system: the effect of different parameters and a system mechanism investigation

被引：38

作者：

Luo, Wei ^{[1
]}

Huang, Wenyu ^{[1
,2
]}

Feng, Xiaoqing ^{[1
]}

Huang, Ying ^{[1
]}

Song, Xiongwei ^{[1
]}

Lin, Hongfei ^{[2
]}

Wang, Shuangfei ^{[2
,3
]}

Mailhot, Gilles ^{[4
]}

机构：

[1] Guangxi Univ, Coll Resources Environm & Mat, Nanning 530004, Peoples R China

[2] Guangxi Bossco Environm Protect Technol Co Ltd, Nanning 530007, Peoples R China

[3] Guangxi Univ, Guangxi Key Lab Clean Pulp & Papermaking & Pollut, Nanning 530004, Peoples R China

[4] Univ Clermont Auvergne, CNRS, SIGMA Clermont, Inst Chim Clermont Ferrand, F-63000 Clermont Ferrand, France

来源：

RSC ADVANCES | 2020年 / 10卷 / 37期

基金：

中国国家自然科学基金;

关键词：

GRAPHITIC CARBON NITRIDE; PHOTOCATALYTIC DEGRADATION; METHYLENE-BLUE; HYDROGEN-PEROXIDE; G-C3N4; NANOSHEETS; HYDROXYL RADICALS; INORGANIC-IONS; BISPHENOL-A; OXIDATION; COMPOSITE;

D O I：

10.1039/d0ra00993h

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In this study, a series of Fe-doped g-C3N4(Fe-C3N4) samples was synthesized and characterizedviaX-ray powder diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), UV-vis diffuse reflection spectroscopy (UV-vis DRS), and photoluminescence (PL) spectroscopy. The photocatalytic activity of the synthesized Fe-C(3)N(4)was investigated toward methylene blue (MB) degradation with hydrogen peroxide (H2O2) assistance. The results showed that the Fe-C(3)N(4)heterogeneous photo-Fenton-like system showed excellent catalytic performance when the pH value was varied from 3.0 to 9.0. Evaluating the effects of various inorganic anions in the Fe-C(3)N(4)heterogeneous photo-Fenton-like system, HCO(3)(-)showed a dual effect on MB degradation, and Cl(-)and NO(3)(-)showed an inhibitory effect on MB degradation. Evaluating the effects of inorganic cations, Al3+, Mg2+, and Ca(2+)strongly inhibited MB degradation. Recycling experiments demonstrated that Fe-C(3)N(4)possesses good reusability and stability. Quenching experiments were carried out, and it was found that hydroxyl radicals (center dot OH) were the primary active species in the system. Besides, nine intermediates were identifiedviaLC/MS, and a possible MB degradation pathway in the system was proposed. This study could promote the application of this Fe-C(3)N(4)heterogeneous photo-Fenton-like system in realistic dye wastewater.

引用

页码：21876 / 21886

页数：11

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