Incorporation of amide functional groups to graphene oxide during the photocatalytic degradation of free cyanide

José M. Barrera-Andrade; Elizabeth Rojas-García; Jesús García-Valdés; Miguel A. Valenzuela; Elim Albiter

doi:10.1016/j.matlet.2020.128538

Incorporation of amide functional groups to graphene oxide during the photocatalytic degradation of free cyanide

José M. Barrera-Andrade, Elizabeth Rojas-García, Jesús García-Valdés, Miguel A. Valenzuela, Elim Albiter

Escuela Superior de Ingeniería Química e Industrias Extractivas (ESIQIE)

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

Pristine graphene oxide (GO) prepared by a conventional method (Hummers) showed to be a promising photocatalyst for the degradation of free cyanide (CN⁻) in aqueous solution. High conversion of cyanide was found (ca. 80%), revealing that the main by-product was amide species (C[rad]ONH₂) linked to GO, and a minimal amount was cyanate (CNO⁻) by-product in solution. Our results, supported by FTIR and Raman characterization, explain GO direct functionalization by the amide species formed during the cyanide photocatalytic oxidation. This finding could provide a new way to perform immediate GO functionalization through photocatalytic reactions and its use in other applications (e.g., CO₂ adsorption).

Original language	English
Article number	128538
Journal	Materials Letters
Volume	280
DOIs	https://doi.org/10.1016/j.matlet.2020.128538
State	Published - 1 Dec 2020

Keywords

Amide
Degradation
Free cyanide
Functionalization
Graphene oxide
Photocatalysis

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10.1016/j.matlet.2020.128538

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title = "Incorporation of amide functional groups to graphene oxide during the photocatalytic degradation of free cyanide",

abstract = "Pristine graphene oxide (GO) prepared by a conventional method (Hummers) showed to be a promising photocatalyst for the degradation of free cyanide (CN−) in aqueous solution. High conversion of cyanide was found (ca. 80%), revealing that the main by-product was amide species (C[rad]ONH2) linked to GO, and a minimal amount was cyanate (CNO−) by-product in solution. Our results, supported by FTIR and Raman characterization, explain GO direct functionalization by the amide species formed during the cyanide photocatalytic oxidation. This finding could provide a new way to perform immediate GO functionalization through photocatalytic reactions and its use in other applications (e.g., CO2 adsorption).",

keywords = "Amide, Degradation, Free cyanide, Functionalization, Graphene oxide, Photocatalysis",

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T1 - Incorporation of amide functional groups to graphene oxide during the photocatalytic degradation of free cyanide

AU - Barrera-Andrade, José M.

AU - Rojas-García, Elizabeth

AU - García-Valdés, Jesús

AU - Valenzuela, Miguel A.

AU - Albiter, Elim

PY - 2020/12/1

Y1 - 2020/12/1

N2 - Pristine graphene oxide (GO) prepared by a conventional method (Hummers) showed to be a promising photocatalyst for the degradation of free cyanide (CN−) in aqueous solution. High conversion of cyanide was found (ca. 80%), revealing that the main by-product was amide species (C[rad]ONH2) linked to GO, and a minimal amount was cyanate (CNO−) by-product in solution. Our results, supported by FTIR and Raman characterization, explain GO direct functionalization by the amide species formed during the cyanide photocatalytic oxidation. This finding could provide a new way to perform immediate GO functionalization through photocatalytic reactions and its use in other applications (e.g., CO2 adsorption).

AB - Pristine graphene oxide (GO) prepared by a conventional method (Hummers) showed to be a promising photocatalyst for the degradation of free cyanide (CN−) in aqueous solution. High conversion of cyanide was found (ca. 80%), revealing that the main by-product was amide species (C[rad]ONH2) linked to GO, and a minimal amount was cyanate (CNO−) by-product in solution. Our results, supported by FTIR and Raman characterization, explain GO direct functionalization by the amide species formed during the cyanide photocatalytic oxidation. This finding could provide a new way to perform immediate GO functionalization through photocatalytic reactions and its use in other applications (e.g., CO2 adsorption).

KW - Amide

KW - Degradation

KW - Free cyanide

KW - Functionalization

KW - Graphene oxide

KW - Photocatalysis

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DO - 10.1016/j.matlet.2020.128538

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VL - 280

JO - Materials Letters

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Incorporation of amide functional groups to graphene oxide during the photocatalytic degradation of free cyanide

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Keywords

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