Colorimetry /SERS dual-sensor of H2O2 constructed via TMB–Fe3O4@ AuNPs

Liu, Qixin; Tang, Ping; Xing, Xiaobo; Cheng, Wendai; Liu, Shengde; Liu, Xiaoxu; Zhong, Liu

doi:10.1016/j.talanta.2021.123118

Cited by 23 publications

(5 citation statements)

References 38 publications

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“…For example, Zhou et al found that Au NP/GeO 2 nano-enzymes exhibited stronger peroxidase-like activity than single Au NPs or GeO 2 [ 57 ]. Zhong et al synthesized a novel H 2 O 2 dual sensor constructed from TMB-Fe 3 O 4 @Au NPs by combining colorimetry and surface-enhanced Raman spectroscopy [ 58 ]. The linear range was from 40 μM to 5.5 mM with a detection limit of 11.1 μM in a colorimetric assay, and the sensor was successfully applied to the detection of H 2 O 2 in plasma and milk, showing excellent performance and flexibility.…”

Section: Sensing Strategy Based On the Activity Of Au Np-like Enzymesmentioning

confidence: 99%

Chromogenic Mechanisms of Colorimetric Sensors Based on Gold Nanoparticles

Cui

Zhao

2023

Biosensors

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The colorimetric signal readout method is widely used in visualized analyses for its advantages, including visualization of test results, simple and fast operations, low detection cost and fast response time. Gold nanoparticles (Au NPs), which not only exhibit enzyme-like activity but also have the advantages of tunable localized surface plasmon resonance (LSPR), high stability, good biocompatibility and easily modified properties, provide excellent platforms for the construction of colorimetric sensors. They are widely used in environmental monitoring, biomedicine, the food industry and other fields. This review focuses on the chromogenic mechanisms of colorimetric sensors based on Au NPs adopting two different sensing strategies and summarizes significant advances in Au NP-based colorimetric sensing with enzyme-like activity and tunable LSPR characteristics. In addition, the sensing strategies based on the LSPR properties of Au NPs are classified into four modulation methods: aggregation, surface modification, deposition and etching, and the current status of visual detection of various analytes is discussed. Finally, the review further discusses the limitations of current Au NP-based detection strategies and the promising prospects of Au NPs as colorimetric sensors, guiding the design of novel colorimetric sensors.

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Section: Sensing Strategy Based On the Activity Of Au Np-like Enzymesmentioning

confidence: 99%

Chromogenic Mechanisms of Colorimetric Sensors Based on Gold Nanoparticles

Cui

Zhao

2023

Biosensors

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“…For the detection of H 2 O 2 , a diversity of techniques have been implemented, including fluorescence, , electrochemistry, , liquid chromatography, and colorimetry, , among which electrochemical methods are widely used because of their simplicity and high efficiency . Usually, the traditional electrochemical sensors use enzymes (for example, catalase and horseradish peroxidase) for H 2 O 2 detection based on the direct electron transfer between redox enzymes and electrodes.…”

Section: Introductionmentioning

confidence: 99%

CuO/CoZn-Layered Double-Hydroxide Nanowires on Carbon Cloth as an Enzyme-Free H₂O₂ Sensor

Dong,

Ouyang,

Huo

et al. 2024

ACS Appl. Nano Mater.

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Transition metal layered double hydroxides (LDHs) have attracted much attention as catalysts due to their multiple valence states and high electrocatalytic activity. Traditional enzyme-based electrochemical H2O2 sensor is limited by short lifetime, instability, and complicated fabrication procedure, making it difficult to be widely used. Instead of natural enzymes, transition metal based LDHs can be applied as electrocatalysts for enzyme-free H2O2 sensor. In this work, CoZn-LDH nanosheets grown on CuO nanowires (NWs) were synthesized on carbon cloth (CC) by electrodeposition and hydrothermal methods for the electrochemical enzyme-free detection of H2O2. For this purpose, CuO NWs were first electrodeposited on CC substrate, on which CoZn bimetal LDH nanosheets were synthesized by the hydrothermal technique. Herein, CC provides an ideal conductive substrate for the growth of CuO NWs and CoZn-LDH, so that the sythesized CuO/CoZn-LDH NWs can be evenly dispersed, exposing more active sites for the enhancement of their electrocatalytic activity. As a result, CuO/CoZn-LDH NWs display excellent electrocatalytic activity for the reduction of H2O2. The fabricated sensor has a good linear response in the concentration range of 0.01–16 mM for the electrochemical detection of H2O2, with low detection limit of 0.46 μM and high sensitivity of 760.64 μA mM–1 cm–2. In real sample mouthwash detection, the proposed sensor demonstrates the efficient recovery of H2O2, indicating the ability of CuO/CoZn-LDH NWs to quantitatively detect real samples.

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“…Then, colorless TMB is oxidized into a blue colored product (oxTMB) by $OH. 18,19 It is reported that Cr(VI) can facilitate the decomposition of H 2 O 2 and produce $OH. 20 The increased concentration of $OH can enhance the oxidation rate of TMB, improving the peroxidase-like activity of nanozymes.…”

Section: Introductionmentioning

confidence: 99%

Ultrafast colorimetric detection of Cr(vi) using Fe₃O₄@polydopamine/Prussian blue composites as a highly efficient peroxidase mimic

Guo

Lei

2023

Anal. Methods

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Colorimetry /SERS dual-sensor of H2O2 constructed via TMB–Fe3O4@ AuNPs

Cited by 23 publications

References 38 publications

Chromogenic Mechanisms of Colorimetric Sensors Based on Gold Nanoparticles

Chromogenic Mechanisms of Colorimetric Sensors Based on Gold Nanoparticles

CuO/CoZn-Layered Double-Hydroxide Nanowires on Carbon Cloth as an Enzyme-Free H₂O₂ Sensor

Ultrafast colorimetric detection of Cr(vi) using Fe₃O₄@polydopamine/Prussian blue composites as a highly efficient peroxidase mimic

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Colorimetry /SERS dual-sensor of H2O2 constructed via TMB–Fe3O4@ AuNPs

Cited by 23 publications

References 38 publications

Chromogenic Mechanisms of Colorimetric Sensors Based on Gold Nanoparticles

Chromogenic Mechanisms of Colorimetric Sensors Based on Gold Nanoparticles

CuO/CoZn-Layered Double-Hydroxide Nanowires on Carbon Cloth as an Enzyme-Free H2O2 Sensor

Ultrafast colorimetric detection of Cr(vi) using Fe3O4@polydopamine/Prussian blue composites as a highly efficient peroxidase mimic

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CuO/CoZn-Layered Double-Hydroxide Nanowires on Carbon Cloth as an Enzyme-Free H₂O₂ Sensor

Ultrafast colorimetric detection of Cr(vi) using Fe₃O₄@polydopamine/Prussian blue composites as a highly efficient peroxidase mimic