Polyethylenimine-stabilized silver nanoclusters act as an oxidoreductase mimic for colorimetric determination of chromium(VI)

Xue, Qiangsheng; Li, Xin; Peng, Yinxian; Liu, Peng; Peng, Hongbing; Niu, Xiangheng

doi:10.1007/s00604-020-04232-8

Cited by 53 publications

(21 citation statements)

References 39 publications

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“…Nanozymes could be fabricated from different materials including nanocarbon materials, metal oxides, noble metals nanostructures, metal-organic frameworks, and layered double hydroxides [2][3][4]. For example, many silver nanomaterials with enzyme-mimic activities have been used for the detection of various analytes [10][11][12][13][14][15]. Despite their good chemical stability under natural conditions, silver nanoparticles enzyme mimics are susceptible to aggregation which decrease its catalytic activity [16].…”

Section: Introductionmentioning

confidence: 99%

Peroxidase-Like Activity of Silver Nanoparticles Loaded Filter Paper and its Potential Application for Sensing

Alula

Feke

2021

J Clust Sci

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Nanozymes are nanomaterials that possess intrinsic enzyme mimicking activity. In this study, the application of silver nanoparticles coated filter paper (AgNPs/FP) that exhibits a peroxidase-like catalytic activity as a potential sensor is reported. A simple chemical reduction method was used to produce AgNPs/FP. The formation of the particles on filter paper were characterized using scanning electron microscopy (SEM), X-ray diffraction (XRD), and surface-enhanced Raman spectroscopy (SERS). In the presence of hydrogen peroxide, AgNPs/FP oxidized the colorless o-phenylenediamine (OPD) and 3,3 0 ,5,5 0 -tetramethylbenzidine (TMB) solutions to a yellow colored 2,3-diaminophenazine (DAP) and deep blue colored oxidized TMB (oxTMB), respectively. In the presence of thiocyanate, however, the peroxidase-like activity was inhibited in a concentration dependent manner. This makes the AgNPs/FP a promising catalyst and employed for colorimetric detection of thiocyanate via inhibition of the peroxidase-like activity. The application can be further extended to other environmentally and biologically important analytes.

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Section: Introductionmentioning

confidence: 99%

Peroxidase-Like Activity of Silver Nanoparticles Loaded Filter Paper and its Potential Application for Sensing

Alula

Feke

2021

J Clust Sci

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“…2− and Cr 2 O 7 2− [1][2][3][4][5][6][7]. While Cr(III) plays a vital role in maintaining normal life activities [2][3][4][5]7,8], Cr(VI) is widely recognized as a highly toxic pollutant [2][3][4]6,7,9,10] with carcinogenic [2][3][4][5]7,8,11] and mutagenic effects [4,5,7]. Cr(VI) can cause metabolic disorders and damage to the kidney and other organs [5,10,[12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

“…Cr(VI) can cause metabolic disorders and damage to the kidney and other organs [5,10,[12][13][14][15][16]. Fortunately, the existing methods, including atomic absorption spectroscopy, [2][3][4][6][7][8][9][10][17][18][19][20], inductively coupled plasma-mass spectrometry [7,8,10,20,21] and inductively coupled plasma-optical emission spectrometry, [7,10,22,23], could provide an extremely sensitive, selective and reliable way for the detection of Cr(III) and Cr(VI) in real samples [7]. However, these methods usually involve tedious sample preparation, expensive equipment use, and lab-based tests [2][3][4][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

“…Fortunately, the existing methods, including atomic absorption spectroscopy, [2][3][4][6][7][8][9][10][17][18][19][20], inductively coupled plasma-mass spectrometry [7,8,10,20,21] and inductively coupled plasma-optical emission spectrometry, [7,10,22,23], could provide an extremely sensitive, selective and reliable way for the detection of Cr(III) and Cr(VI) in real samples [7]. However, these methods usually involve tedious sample preparation, expensive equipment use, and lab-based tests [2][3][4][6][7][8][9][10][11]. Therefore, there is always an urgent demand for the development of mobile, simple and reliable methods for rapid determination of trace Cr(VI) [2,3,8,11] and other pollutants.…”

Section: Introductionmentioning

confidence: 99%

“…Analytical methods employing Gold nanoparticles (Au NPs) include colorimetry, [6,7,[24][25][26][27][28][29][30][31][32], surface-enhanced Raman scattering (SERS) [33,34], and surface plasmonic resonance (SPR) [7,35] offer improved performance compared to traditional methods. Some of them have already been commercialized for practical application.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Smartphone-Based Colorimetric Detection of Chromium (VI) by Maleic Acid-Functionalized Gold Nanoparticles

Mohamed

et al. 2021

Applied Sciences

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Because of the significant environmental pollution produced by human activities, there is an ongoing need to develop transportable, simple, and reliable techniques for determining trace contaminants on the spot. This work reported a colorimetric detection method for aqueous Cr(VI) sensing by maleic acid-functionalized gold nanoparticles with high sensitivity and selectivity. The wine-red color of the probe solution can change to gray even in the presence of 1.0 µg L−1 of aqueous Cr(VI). Moreover, with the assistance of a smartphone installed with a commercially available color scan application software, its concentration of could be readily quantified on the spot without the help of UV-Vis spectrometer. The detection limit could reach as low as 0.1 µg L−1 with linear range from 0.2 to 2.0 µg L−1. Most importantly, the coefficient variation of the proposed smartphone-based method was equivalent to that of colorimetry, demonstrating the high accuracy of the proposed method for accurate detection of Cr(VI) in resource-constrained countries. Conclusively, with the help of the smartphone, this nanomaterials-based probe demonstrated the potential in the field of environment monitoring for on-site quantitative detection of any pollutants in resource-constrained countries.

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Nanozyme‐Enabled Biomedical Diagnosis: Advances, Trends, and Challenges

Tian,

Li,

Tang

et al. 2024

Adv Healthcare Materials

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As nanoscale materials with the function of catalyzing substrates through enzymatic kinetics, nanozymes are regarded as potential alternatives to natural enzymes. Compared to protein‐based enzymes, nanozymes exhibit attractive characteristics of low preparation cost, robust activity, flexible performance adjustment, and versatile functionalization. These advantages endow them with wide use from biochemical sensing and environmental remediation to medical theranostics. Especially in biomedical diagnosis, the feature of catalytic signal amplification provided by nanozymes makes them function as emerging labels for the detection of biomarkers and diseases, with rapid developments observed in recent years. To provide a comprehensive overview of recent progress made in this dynamic field, here an overview of biomedical diagnosis enabled by nanozymes is provided. This review first summarizes the synthesis of nanozyme materials and then discusses the main strategies applied to enhance their catalytic activity and specificity. Subsequently, representative utilization of nanozymes combined with biological elements in disease diagnosis is reviewed, including the detection of biomarkers related to metabolic, cardiovascular, nervous, and digestive diseases as well as cancers. Finally, some development trends in nanozyme‐enabled biomedical diagnosis are highlighted, and corresponding challenges are also pointed out, aiming to inspire future efforts to further advance this promising field.

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Polyethylenimine-stabilized silver nanoclusters act as an oxidoreductase mimic for colorimetric determination of chromium(VI)

Cited by 53 publications

References 39 publications

Peroxidase-Like Activity of Silver Nanoparticles Loaded Filter Paper and its Potential Application for Sensing

Peroxidase-Like Activity of Silver Nanoparticles Loaded Filter Paper and its Potential Application for Sensing

Smartphone-Based Colorimetric Detection of Chromium (VI) by Maleic Acid-Functionalized Gold Nanoparticles

Nanozyme‐Enabled Biomedical Diagnosis: Advances, Trends, and Challenges

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