CoSe2 nanoflakes: An artificial nanoenzyme with excellent peroxidase like activity

Warkhade, Swapnil K.; Singh, Rudra Pratap; Das, Ramkrishna; Gaikwad, G.S.; Zodape, Sangesh P.; Pratap, Umesh R.; Maldhure, Atul V.; Wankhade, Atul V.

doi:10.1016/j.inoche.2021.108461

Cited by 18 publications

(7 citation statements)

References 33 publications

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“…The peroxidase activity of LDHs may also be related to the electron-transfer mechanism. The wide bandgap between H 2 O 2 and TMB suppresses the direct electron transfer from TMB to H 2 O 2 . The reduction potential of LDHs lies exactly between that of H 2 O 2 and that of TMB, facilitating electron transfer from TMB to H 2 O 2 via LDHs, and the surface properties of the LDHs can affect the H 2 O 2 absorption and particle-mediated electron-transfer processes.…”

Section: Resultsmentioning

confidence: 99%

Determination of the Catalytic Activity of a Peroxidase-like Nanozyme and Differences among Layered Double Hydroxides with Different Anions and Cations

Ma,

Wang,

Zhang

et al. 2023

ACS Omega

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Nanomaterials with enzyme-like activity, namely, nanozymes, have been widely used as substitutes for natural enzymes, and they show excellent potential for application in many fields, such as biotechnology, environmental chemistry, and medicine. Layered double hydroxides (LDHs) are inorganic nanomaterials with adjustable compositions, simple preparation methods, and low costs and are some of the most promising candidate materials for the preparation of nanozymes. Here, we studied the syntheses and peroxidase-like activities of LDHs with four anions and four cations. First, LDHs prepared by the coprecipitationhydrothermal method adopted hexagonal lamellar structures with good dispersion and uniform particle sizes. The Lambert−Beer law showed that the prepared LDHs exhibited good enzymatic activity. Later, the K m and V max values of the LDHs with different anionic/cationic materials intercalated into their structures were compared. Under the optimum conditions, the V max of Mg 2 Al-NO 3 -LDH was 7.35 × 10 −2 , which is 2−4 times higher than that of the LDHs containing other anions; the V max values of NiFe-LDH and FeAl-LDH were 0.152 and 0.284, respectively, which are 10 times higher than those of the LDHs with other cations. Importantly, according to kinetic analyses of the enzymatic reactions, the effects of Fe 2+ and Fe 3+ on the LDH enzyme activity were greater than those of the intercalated anions. This study showed that NiFe-LDH and FeAl-LDH with high catalytic activities are candidate materials for peroxidase simulations, which may provide new strategies for the application of LDHs in biosensors, antioxidants, biotechnology, and other nanozyme applications.

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Section: Resultsmentioning

confidence: 99%

Determination of the Catalytic Activity of a Peroxidase-like Nanozyme and Differences among Layered Double Hydroxides with Different Anions and Cations

Ma,

Wang,

Zhang

et al. 2023

ACS Omega

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“…[42] Wang et al accounted that the coordination number of single Mo sites could regulate the peroxidase-like specificity. [46] Because catalytic activities are intrinsically substantialized by atomisticlevel reaction mechanisms and kinetics, the progress on the Redox potential [41] MoS 2 Defect-rich edges [42] CuS nanocluster Oxygen vacancy concentration [43] Graphene quantum dots…”

Section: Structure-activity Relationships From Experimentsmentioning

confidence: 99%

Reaction Mechanisms and Kinetics of Nanozymes: Insights from Theory and Computation

2023

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Abstract“Nanozymes” usually refers to inorganic nanomaterials with enzyme‐like catalytic activities. The research into nanozymes is one of the hot topics on the horizon of interdisciplinary science involving materials, chemistry, and biology. Although great progress has been made in the design, synthesis, characterization, and application of nanozymes, the study of the underlying microscopic mechanisms and kinetics is still not straightforward. Density functional theory (DFT) calculations compute the potential energy surfaces along the reaction coordinates for chemical reactions, which can give atomistic‐level insights into the micro‐mechanisms and kinetics for nanozymes. Therefore, DFT calculations have been playing an increasingly important role in exploring the mechanisms and kinetics for nanozymes in the past years. The calculations either predict the microscopic details for the catalytic processes to compliment the experiments or further develop theoretical models to depict the physicochemical rules. In this review, the corresponding research progress is summarized. Particularly, the review focuses on the computational studies that closely interplay with the experiments. The relevant experimental results without DFT calculations will be also briefly discussed to offer a historic overview of how the computations promote the understanding of the microscopic mechanisms and kinetics of nanozymes.

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“…[52][53][54][55][56][57] The mechanisms of most peroxidase-like nanozymes are to decompose H 2 O 2 into hydroxyl radicals ( OH) and then further oxidize substrates. 58,59 Currently, most works on peroxidase-like nanozymes mainly focus on the aspects of the fabrication of biosensors. The biosensors designed using peroxidase-like nanozymes present excellent performance with sensitivity, versatility, and stability, which could allow the detection of respiratory disease-related substances or molecules.…”

Section: Peroxidase-like Activitymentioning

confidence: 99%

Advances and perspectives of nanozymes in respiratory diseases

He¹,

Shi²,

Zheng³

et al. 2023

J. Mater. Chem. B

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CoSe2 nanoflakes: An artificial nanoenzyme with excellent peroxidase like activity

Cited by 18 publications

References 33 publications

Determination of the Catalytic Activity of a Peroxidase-like Nanozyme and Differences among Layered Double Hydroxides with Different Anions and Cations

Determination of the Catalytic Activity of a Peroxidase-like Nanozyme and Differences among Layered Double Hydroxides with Different Anions and Cations

Reaction Mechanisms and Kinetics of Nanozymes: Insights from Theory and Computation

Advances and perspectives of nanozymes in respiratory diseases

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