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      Graphene oxide-based colorimetric detection of organophosphorus pesticides via a multi-enzyme cascade reaction

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          Abstract

          A GO-based colorimetric method was developed for sensitive detection of OPs at nanomolar levels via a multi-enzyme cascade reaction.

          Abstract

          Size-tunable graphene oxides (GO) were synthesized as a horseradish peroxidase (HRP) mimic for colorimetric detection of organophosphorus pesticides (OPs) at nanomolar levels via a cascade reaction. A GO-based colorimetric method showed high sensitivity and stability toward OPs, which hold great potential in public health applications.

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          Preparation of Graphitic Oxide

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            Honeycomb carbon: a review of graphene.

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              Nitrogen-doped graphene as efficient metal-free electrocatalyst for oxygen reduction in fuel cells.

              Nitrogen-doped graphene (N-graphene) was synthesized by chemical vapor deposition of methane in the presence of ammonia. The resultant N-graphene was demonstrated to act as a metal-free electrode with a much better electrocatalytic activity, long-term operation stability, and tolerance to crossover effect than platinum for oxygen reduction via a four-electron pathway in alkaline fuel cells. To the best of our knowledge, this is the first report on the use of graphene and its derivatives as metal-free catalysts for oxygen reduction. The important role of N-doping to oxygen reduction reaction (ORR) can be applied to various carbon materials for the development of other metal-free efficient ORR catalysts for fuel cell applications, even new catalytic materials for applications beyond fuel cells.
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                Author and article information

                Contributors
                Journal
                NANOHL
                Nanoscale
                Nanoscale
                Royal Society of Chemistry (RSC)
                2040-3364
                2040-3372
                March 12 2020
                2020
                : 12
                : 10
                : 5829-5833
                Affiliations
                [1 ]State Key Laboratory of Supramolecular Structure and Materials
                [2 ]Institute of Theoretical Chemistry
                [3 ]Jilin University
                [4 ]Changchun
                [5 ]China
                [6 ]Institute of Agro-food Technology
                [7 ]Jilin Academy of Agricultural Sciences
                [8 ]Changchun 130033
                Article
                10.1039/C9NR10862A
                595a71b8-4621-4772-a3b0-4ff2654bd044
                © 2020

                http://rsc.li/journals-terms-of-use

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