Amplified colorimetric detection of Ag+ based on Ag+-triggered peroxidase-like catalytic activity of ZIF-8/GO nanosheets

Li, Chao-rui; Hai, Jun; Fan, Long; Li, Siliang; Wang, Bi-Dar; Zhou, Yang

doi:10.1016/j.snb.2018.12.137

Cited by 58 publications

(17 citation statements)

References 67 publications

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“…43−46 The development of a facile and effective strategy for the preparation of dispersive GO/MOF nanosheets with a uniform and complete MOF coating toward efficient Cu/Cu 2 O-loaded GNPCN precursors is repeated several times. 47,48 However, two-dimensional oriented GO/ MOF nanocomposites for the CO 2 electroreduction has seldom been studied.…”

Section: ■ Introductionmentioning

confidence: 99%

Cu/Cu₂O Nanoparticles Supported on Vertically ZIF-L-Coated Nitrogen-Doped Graphene Nanosheets for Electroreduction of CO₂ to Ethanol

Zhang

Chen

et al. 2019

ACS Appl. Nano Mater.

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Metal−organic framework (MOF)-derived nanomaterials provide outstanding catalytic activities for CO 2 electroreduction due to their large surface area, tunable geometric structures, and controllable pore size. Herein, we develop a Cu/Cu 2 O nanocomposite loaded on the surface of carbon derived from direct carbonization of two-dimensional cross-like zeolitic imidazolate framework-L coated vertically on graphene oxide (Cu GNC-VL). The as-synthesized catalyst presented an excellent faradaic efficiency of 70.52% and current density of 10.4 mA cm −2 at −0.87 V versus the reversible hydrogen electrode, which benefits from the synergy between CO 2 asymmetric chemical adsorption on Cu(111) and favorable kinetics and thermodynamics of C−C coupling on Cu 2 O(111). This study presents a strategy for the rational design and multiple-pathway modulation of the geometry structure of MOF-derived catalysts.

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Section: ■ Introductionmentioning

confidence: 99%

Cu/Cu₂O Nanoparticles Supported on Vertically ZIF-L-Coated Nitrogen-Doped Graphene Nanosheets for Electroreduction of CO₂ to Ethanol

Zhang

Chen

et al. 2019

ACS Appl. Nano Mater.

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“…The peroxidase-like activity of type I nanozymes such as cysteine-stabilised Fe 3 O 4 magnetic nanoparticles (MNPs) [ 102 ], chitosan-functionalised MoSe 2 [ 103 ] and Co 9 S 8 [ 104 ] can also be triggered by metal ions. Nanocomposite type III nanozymes have also been explored through the synergistic combination of metal nanoparticles, graphene-based materials or MOFs [ 56 , 105 , 106 , 107 , 108 , 109 ]. These nanocomposites can serve to enhance the catalytic activity or are dual-purpose nanozymes for the adsorption and detection of the metal ion of interest.…”

Section: Detection Of Metal Ionsmentioning

confidence: 99%

“…Thus, it is vital to monitor the presence of silver in environmental and biological samples. Nanozymes for Ag + detection based on catalytic enhancement [ 106 ] and inhibition [ 99 , 100 ] have both been demonstrated. To more closely mimic natural enzymes, Zhang et al [ 99 ] have modified Pd nanozymes with histidine.…”

Section: Detection Of Metal Ionsmentioning

confidence: 99%

Nanozymes for Environmental Pollutant Monitoring and Remediation

Wong¹,

Vuong²,

Chow³

2021

Sensors

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Nanozymes are advanced nanomaterials which mimic natural enzymes by exhibiting enzyme-like properties. As nanozymes offer better structural stability over their respective natural enzymes, they are ideal candidates for real-time and/or remote environmental pollutant monitoring and remediation. In this review, we classify nanozymes into four types depending on their enzyme-mimicking behaviour (active metal centre mimic, functional mimic, nanocomposite or 3D structural mimic) and offer mechanistic insights into the nature of their catalytic activity. Following this, we discuss the current environmental translation of nanozymes into a powerful sensing or remediation tool through inventive nano-architectural design of nanozymes and their transduction methodologies. Here, we focus on recent developments in nanozymes for the detection of heavy metal ions, pesticides and other organic pollutants, emphasising optical methods and a few electrochemical techniques. Strategies to remediate persistent organic pollutants such as pesticides, phenols, antibiotics and textile dyes are included. We conclude with a discussion on the practical deployment of these nanozymes in terms of their effectiveness, reusability, real-time in-field application, commercial production and regulatory considerations.

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“…When the targets are added, the colorimetric aptasensors can convert the target signal into a color change. To improve the sensitivity, the signal amplification strategy has been employed in increasingly more widespread applications in colorimetric biosensors for detecting low analyte concentrations (Taghdisi et al, 2018;Li C. et al, 2019). In the colorimetric aptasensor system, noble metal nanoparticles are usually applied as signal indicators due to their ability to change color when changing from a dispersion state to an aggregation state (Danesh et al, 2018;Zhang et al, 2018).…”

Section: Colorimetric Aptasensorsmentioning

confidence: 99%

Progress on Structured Biosensors for Monitoring Aflatoxin B1 From Biofilms: A Review

Wang

Yang

2020

Front. Microbiol.

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Aspergillus exists commonly in many crops and any process of crop growth, harvest, storage, and processing can be polluted by this fungus. Once it forms a biofilm, Aspergillus can produce many toxins, such as aflatoxin B1 (AFB1), ochratoxin, zearalenone, fumonisin, and patulin. Among these toxins, AFB1 possesses the highest toxicity and is labeled as a group I carcinogen in humans and animals. Consequently, the proper control of AFB1 produced from biofilms in food and feed has long been recognized. Moreover, many biosensors have been applied to monitor AFB1 in biofilms in food. Additionally, in recent years, novel molecular recognition elements and transducer elements have been introduced for the detection of AFB1. This review presents an outline of recent progress made in the development of biosensors capable of determining AFB1 in biofilms, such as aptasensors, immunosensors, and molecularly imprinted polymer (MIP) biosensors. In addition, the current feasibility, shortcomings, and future challenges of AFB1 determination and analysis are addressed.

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Amplified colorimetric detection of Ag+ based on Ag+-triggered peroxidase-like catalytic activity of ZIF-8/GO nanosheets

Cited by 58 publications

References 67 publications

Cu/Cu₂O Nanoparticles Supported on Vertically ZIF-L-Coated Nitrogen-Doped Graphene Nanosheets for Electroreduction of CO₂ to Ethanol

Cu/Cu₂O Nanoparticles Supported on Vertically ZIF-L-Coated Nitrogen-Doped Graphene Nanosheets for Electroreduction of CO₂ to Ethanol

Nanozymes for Environmental Pollutant Monitoring and Remediation

Progress on Structured Biosensors for Monitoring Aflatoxin B1 From Biofilms: A Review

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Amplified colorimetric detection of Ag+ based on Ag+-triggered peroxidase-like catalytic activity of ZIF-8/GO nanosheets

Cited by 58 publications

References 67 publications

Cu/Cu2O Nanoparticles Supported on Vertically ZIF-L-Coated Nitrogen-Doped Graphene Nanosheets for Electroreduction of CO2 to Ethanol

Cu/Cu2O Nanoparticles Supported on Vertically ZIF-L-Coated Nitrogen-Doped Graphene Nanosheets for Electroreduction of CO2 to Ethanol

Nanozymes for Environmental Pollutant Monitoring and Remediation

Progress on Structured Biosensors for Monitoring Aflatoxin B1 From Biofilms: A Review

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Product

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Cu/Cu₂O Nanoparticles Supported on Vertically ZIF-L-Coated Nitrogen-Doped Graphene Nanosheets for Electroreduction of CO₂ to Ethanol

Cu/Cu₂O Nanoparticles Supported on Vertically ZIF-L-Coated Nitrogen-Doped Graphene Nanosheets for Electroreduction of CO₂ to Ethanol