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Issue 36, 2018
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A dual-reaction-center Fenton-like process on –C[triple bond, length as m-dash]N–Cu linkage between copper oxides and defect-containing g-C3N4 for efficient removal of organic pollutants

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Abstract

Copper oxides were supported on the surface of defect-containing g-C3N4 (d-g-C3N4–Cu) by alkalization and hydrothermal methods and characterized using a variety of techniques and density functional theory (DFT) calculations. It was verified that dual reaction centers were constructed by the complexation of–C1[triple bond, length as m-dash]N1–Cu linkages between Cu of copper oxides (CuOx) and cyano (–C1[triple bond, length as m-dash]N1) groups of the side chain in the tri-s-triazine ring of d-g-C3N4, which formed electron-rich centers around Cu sites and electron-poor centers around C1 sites. Based on the experimental results, it was established that the Fenton-like process took place with H2O2 being mainly reduced to hydroxyl radicals (˙OH) by the electrons from electron-rich Cu centers, while both OH and pollutants were adsorbed on the C1 sites, and could be oxidized to donate electrons to Cu centers by electron transfer of π → Cu in –C1[triple bond, length as m-dash]N1–Cu, maintaining charge balance on the d-g-C3N4–Cu. Thus, the catalyst was highly efficient for the degradation of various refractory organic pollutants in water of pH from 3 to 10; moreover, higher pH resulted in higher reaction efficiency because more adsorbed OH at C1 sites produced more ˙OH. Our findings indicate that the dual-reaction-center Fenton-like process is very promising for environmental remediation.

Graphical abstract: A dual-reaction-center Fenton-like process on –C [[triple bond, length as m-dash]] N–Cu linkage between copper oxides and defect-containing g-C3N4 for efficient removal of organic pollutants

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Publication details

The article was received on 25 May 2018, accepted on 30 Jul 2018 and first published on 02 Aug 2018


Article type: Paper
DOI: 10.1039/C8TA04873H
Citation: J. Mater. Chem. A, 2018,6, 17819-17828
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    A dual-reaction-center Fenton-like process on –C[triple bond, length as m-dash]N–Cu linkage between copper oxides and defect-containing g-C3N4 for efficient removal of organic pollutants

    N. Jiang, L. Lyu, G. Yu, L. Zhang and C. Hu, J. Mater. Chem. A, 2018, 6, 17819
    DOI: 10.1039/C8TA04873H

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