Sensitive Voltammetric Determination of Baicalein at Thermally Reduced Graphene Oxide Modified Glassy Carbon Electrode

Zhang, Dongdong; Zhang, Yanmin; He, Langchong

doi:10.1002/elan.201300189

Cited by 38 publications

(20 citation statements)

References 46 publications

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“…That being said, it was found under these experimental conditions that EGCG was the strongest Cu‐chelator as a 1 : 2 ratio had reduced the signal to approximately 0.45 µA. This result was in agreement with previous reports, discussing the potential of EGCG to chelate metal ions 65. In UV‐Vis studies, Zhang et al.…”

Section: Resultssupporting

confidence: 92%

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One‐Pot Transformation of Cellobiose to Formic Acid and Levulinic Acid over Ionic‐Liquid‐based Polyoxometalate Hybrids

Bai

Amaniampong

et al. 2014

ChemSusChem

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Currently, levulinic acid (LA) and formic acid (FA) are considered as important carbohydrates for the production of value-added chemicals. Their direct production from biomass will open up a new opportunity for the transformation of biomass resource to valuable chemicals. In this study, one-pot transformation of cellobiose into LA and FA was demonstrated, using a series of multiple-functional ionic liquid-based polyoxometalate (IL-POM) hybrids as catalytic materials. These IL-POMs not only markedly promoted the production of valuable chemicals including LA, FA and monosaccharides with high selectivities, but also provided great convenience of the recovery and the reuse of the catalytic materials in an environmentally friendly manner. Cellobiose conversion of 100%, LA selectivity of 46.3%, and FA selectivity of 26.1% were obtained at 423 K and 3 MPa for 3 h in presence of oxygen. A detailed catalytic mechanism for the one-pot transformation of cellobiose was also presented.

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Section: Resultssupporting

confidence: 92%

“…In UV‐Vis studies, Zhang et al. 65 reported a spectral change induced by the presence of Cu upon interaction with EGCG, in which a characteristic absorbance peak at approximately 320 nm diminished with increasing Cu concentrations. They also noted a fast interaction time that contributed to the notion of EGCG as a potent Cu chelator.…”

Section: Resultsmentioning

confidence: 99%

One‐Pot Transformation of Cellobiose to Formic Acid and Levulinic Acid over Ionic‐Liquid‐based Polyoxometalate Hybrids

Bai

Amaniampong

et al. 2014

ChemSusChem

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“…Novel electrochemical sensors modified with graphene are generally tested for the detection of glucose 27, hydrogen peroxide 28, β‐nicotinamide adenine dinucleotide 29 and dopamine 30 etc. Among these applications, the most popular prepared method to scale up the production of graphene was the chemical 11, electrochemical 31–33 or thermal 34, 35 reduction of graphene oxide (GO) exfoliated from oxidized graphite. The method of electrochemical reduction of GO is green, fast, free reagent and will not result in contamination of the reduced material.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Behavior and Voltammetric Determination of Curcumin at Electrochemically Reduced Graphene Oxide Modified Glassy Carbon Electrode

Zhang

Ouyang

et al. 2015

Electroanalysis

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[a] 1Introduction Natural phenolic compounds from medicinal herbs and dietary plants including phenolic acids,f lavonoids,t annins,s tilbenes,c urcuminoids,c oumarins,l ignans,q uinones etc. play an important role in cancer prevention and treatment and various bioactivities [1].C urcumin [1,7-bis(4-hydroxy-3-methoxyphenyl)-1,6-heptadiene-3,5-dione] is ap olyphenol compound, an atural product derived from the rhizome of curcumal onga [2] [23] were used for the determination of curcumin. All theser eported electrochemical methods are in the weak or strong acidic analysis system, and the electrochemical reactionm echanism at the electrode surface is still controversial. Thereby,i ti sn ecessary to developamethod for determination of curcumin with high sensitivitya nd simplicity under physiological condition and to investigate the electrochemical reaction mechanism of curcumin.Graphene,atwo-dimensional honeycombl atticeo fs p 2 carbon atoms,i sideallys uited for implementation in electrochemical applications sincei tw as discovered by Geim and co-workers in 2004 [24] due to its bettera nd unique electrochemical properties [25,26].N ovel electrochemical sensors modified with graphene are generally tested for the detection of glucose [27],h ydrogen peroxide [28], bnicotinamide adenine dinucleotide [29] and dopamine [30] etc. Among these applications,t he most popularp reAbstract:T his work presents as ensitive voltammetric methodf or determination of curcumin by using ae lectrochemically reduced graphene oxide( ERGO) modified glass carbon electrode (GCE) in 100 mM KCl-10 mM sodium phosphate buffer solution (pH 7.40). Thee lectrochemical behaviorso fc urcumin at ERGO/GCE were investigated by cyclic voltammetry,s uggesting that the ERGO/GCE exhibits excellente lectrocatalytic activity towardsc urcumin, compared with bare GCE and GO/ GCE electrodes.T he electrochemical reaction mechanisms of curcumin, demethoxycurcumin and bisdemethoxycurcumin at the ERGO/GCE were also investigated and discussed systematically.U nder physiological condition,t he modified electrode showed linear voltammetric response from 0.2 mMt o6 0.0 mMf or curcumin, with the detection limit of 0.1 mm. This work demonstrates that the graphene-modified electrode is ap romising strategy for electrochemical determination of biological important phenolic compounds.

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“…The detection limit is obtained as 3.1 × 10 −9 mol L −1 ( S / N = 3), which is lower than the other systems. For example, Ta 2 O 5 ‐chitosan composite modified carbon paste electrode (0.05 μ M ), thermally RGO modified GCE (0.006 μ M ), poly‐ l ‐lysine modified GCE (0.048 μ M ), boron doped diamond electrode (0.26 μ M ), and so on. The low limit of detection of the modified electrode can be attributed to the good electrocatalytic activity of RGO/PDA/Au nanocatalysts.…”

Section: Resultsmentioning

confidence: 99%

“…Zhang et al . proved a sensitive voltammetric method for determination of baicalein by using a thermally reduced graphene oxide (RGO) modified glassy carbon electrode . Wang et al .…”

Section: Introductionmentioning

confidence: 99%

Gold nanoparticle ensemble on polydopamine/graphene nanohybrid as a novel electrocatalyst for determination of baicalein

Wang

Gou

Shi

et al. 2018

J of Applied Polymer Sci

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A facile and green approach is used to synthesize polydopamine (PDA) functionalized reduced graphene oxide (RGO) via the self‐polymerization of dopamine (DA) under alkaline conditions. The obtained reduced RGO/PDA composite facilitate Au precursor adsorption. Then Au nanoparticles are reduced and assemble onto the surface of RGO/PDA composite form reduced RGO/PDA/gold (RGO/PDA/Au) nanocatalysts. After that, a sensitive electrochemical sensor for baicalein is fabricated based on RGO/PDA/Au nanocatalysts. In this method, the hydroxyl units of PDA can form hydrogen bonding with the phenolic hydroxyl groups of baicalein, making baicalein easily adsorb on the modified electrode surface to enhance the electrochemical response. The electrochemical mechanism of baicalein on the RGO/PDA/Au nanocatalysts modified GCE is thoroughly investigated by cyclic voltammetry. The fabricated electrochemical sensor show good electrochemical activity for baicalein. The linear range of baicalein is 1 × 10−8 to 15 × 10−6 mol L−1 with the detection limit of 3.1 × 10−9 mol L−1. Furthermore, the proposed electrochemical sensor can be used to detect real sample. The results reveal that this method provides a new avenue for electrochemical investigation of baicalein in biochemical, pharmaceutical, and clinical research. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 46720.

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Sensitive Voltammetric Determination of Baicalein at Thermally Reduced Graphene Oxide Modified Glassy Carbon Electrode

Cited by 38 publications

References 46 publications

One‐Pot Transformation of Cellobiose to Formic Acid and Levulinic Acid over Ionic‐Liquid‐based Polyoxometalate Hybrids

One‐Pot Transformation of Cellobiose to Formic Acid and Levulinic Acid over Ionic‐Liquid‐based Polyoxometalate Hybrids

Electrochemical Behavior and Voltammetric Determination of Curcumin at Electrochemically Reduced Graphene Oxide Modified Glassy Carbon Electrode

Gold nanoparticle ensemble on polydopamine/graphene nanohybrid as a novel electrocatalyst for determination of baicalein

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