Highly Active Graphene Oxide-Supported Cobalt Single-Ion Catalyst for Chemiluminescence Reaction

Wang, Jue; Zhong, Wenhui; Li, Xiaoying; Yang, Tongtong; Li, Fang; Li, Qi; Cheng, Weiren; Chen, Gao; Jiang, Zheng; Jiang, Jun; Cui, Hua

doi:10.1021/acs.analchem.7b03873

Cited by 52 publications

(39 citation statements)

References 28 publications

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“…Since Trp, Phe and Tyr are one more indole, benzene and phenol groups than Ala, respectively, the higher effectiveness probably is attributed to their aromatic groups. These aromatic groups would benefit for approaching ABTS through hydrophobic and π‐π stacking interactions, etc . Acidic amino acids, including Asp (pI: 2.97) and Glu (pI: 3.22), were relatively less effective.…”

Section: Resultsmentioning

confidence: 99%

Boosting the Peroxidase‐like Activity of Cobalt Ions by Amino Acid‐based Biological Species and Its Applications

Guo

Liu

2020

Chemistry An Asian Journal

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Enzyme mimics have been widely used as alternatives to natural enzymes, owing to their high stability and low cost. However, the activity and atom economy of enzyme mimics still need to be improved. Herein, we report the boosting effects of amino acids, peptides and proteins on the peroxidase‐like activity of Co2+. Among 20 amino acids, tryptophan (Trp) enhanced the activity of Co2+ approximately 8 times and was identified as the best stimulator. The study revealed the synergy of amino acids‐based species and HCO3− for efficient catalysis. Co2+ is proposed to bind simultaneously to HCO3− and Trp, and to form a ternary catalyst which facilitates the generation of reactive oxygen species. Based on the selective boosting by Trp, a simple and low‐cost Co2+ sensor with high sensitivity was developed, which showed a linear range of 10–300 μM and a limit of detection of 0.4 μM for Co2+.

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Section: Resultsmentioning

confidence: 99%

Boosting the Peroxidase‐like Activity of Cobalt Ions by Amino Acid‐based Biological Species and Its Applications

Guo

Liu

2020

Chemistry An Asian Journal

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“…Such carbon structures have led to their wider band gaps, higher fluorescence, easier oxidation/reduction, and mechanical properties than the defect‐free nanographene. [ 5,23–28 ]…”

Section: Introductionmentioning

confidence: 99%

Natural catalyst for luminol chemiluminescence: application to validate peroxide levels in commercial hair dyes

2022

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Here, we report a hydrothermally treated green leaves (Moringa oleifera) extract exploited as an efficient and highly sensitive catalyst to catalyze the chemiluminescence (CL) reaction of luminol. In the absence of enhancer, this green and hydrothermally treated catalyst was found to significantly enhance the CL intensity $3.5-fold compared with the traditionally used K 3 Fe(CN) 6 catalyst. The structure and surface morphology of the catalyst was elucidated using X-ray photoelectron spectroscopy, scanning electron microscopy, X-ray diffraction, and Raman spectroscopy. The synergistic effect of the catalyst in the CL reaction was systematically investigated in the presence of hydrogen peroxide using ultraviolet-visible and CL spectroscopy.Studies showed that the sensitivity of the catalyst could be amplified by adjusting several parameters such as pH of the medium and concentrations of the base and luminol. The sensitivity of the novel-type catalyst was examined through the validation of hydrogen peroxide levels in commercial hair dye samples. Markedly, the catalyst displayed ultrasensitivity to hydrogen peroxide as the limit of detection of hydrogen peroxide using this catalyst was determined to be 0.02 μM under optimized conditions. In general, the proposed inexpensive, ecofriendly, and nontoxic catalyst could enable the determination of hydrogen peroxide for diverse analytical applications.

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“…This causes poor compatibility of graphene with the matrix, and poor dispersibility in the solvent. To resolve these problems, different methods for modifying graphene have been proposed [30][31][32], including with non-covalent bonding [33][34][35] and covalent bonding [36][37][38].…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Active Graphene with Para-Ester on Cotton Fabrics for Antistatic Properties

Rothenberg

Zhang

et al. 2020

Nanomaterials

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The excellent electrical properties of graphene provide a new functional finishing idea for fabricating conductive cotton fabrics with antistatic properties. This work develops a novel method for synthesizing active graphene to make cotton fabrics conductive and to have antistatic properties. The graphite was oxidized to graphene oxide (GO) by the Hummers method, and was further acid chlorinated and reacted with the para-ester to form the active graphene (JZGO). JZGO was then applied to cotton fabrics and was bonded to the fiber surface under alkaline conditions. Characterizations were done using FT-IR, XRD and Raman spectroscopy, which indicated that the para-ester group was successfully introduced onto JZGO, which also effectively improved the water dispersibility and reactivity of the JZGO. Furthermore, this study found that the antistatic properties of the fabric were increased by more than 50% when JZGO was 3% by weight under low-humidity conditions. The washing durability of the fabrics was also evaluated.

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Highly Active Graphene Oxide-Supported Cobalt Single-Ion Catalyst for Chemiluminescence Reaction

Cited by 52 publications

References 28 publications

Boosting the Peroxidase‐like Activity of Cobalt Ions by Amino Acid‐based Biological Species and Its Applications

Boosting the Peroxidase‐like Activity of Cobalt Ions by Amino Acid‐based Biological Species and Its Applications

Natural catalyst for luminol chemiluminescence: application to validate peroxide levels in commercial hair dyes

Synthesis of Active Graphene with Para-Ester on Cotton Fabrics for Antistatic Properties

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