“Soluble” vs. “insoluble” Prussian blue based catalysts: influence on Fenton-type treatment

Doumic, Lucila I.; Salierno, Gabriel; Ramos, Cinthia Paula; Haure, Patricia M.; Cassanello, Miryan; Ayude, María Alejandra

doi:10.1039/c6ra06618f

Cited by 17 publications

(12 citation statements)

References 25 publications

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“…RKH nanoparticles were more saturated with potassium because they were synthesized in the presence of 0.1 M KCl. Opposite to the previous report [ 53 ], we did not observe a clear relationship between potassium content and catalytic activity of nanozymes ( Figure 3 D,F,G). Even if some dependence exists, in this study, it was masked by other factors, first, the size difference between nanoparticles prepared in various conditions.…”

Section: Resultscontrasting

confidence: 99%

Prussian Blue Nanozymes with Enhanced Catalytic Activity: Size Tuning and Application in ELISA-like Immunoassay

et al. 2022

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Prussian blue nanozymes possessing peroxidase-like activity gather significant attention as alternatives to natural enzymes in therapy, biosensing, and environmental remediation. Recently, Prussian blue nanoparticles with enhanced catalytic activity prepared by reduction of FeCl3/K3[Fe(CN)6] mixture have been reported. These nanoparticles were denoted as ‘artificial peroxidase’ nanozymes. Our study provides insights into the process of their synthesis. We studied how the size of nanozymes and synthesis yield can be controlled via adjustment of the synthesis conditions. Based on these results, we developed a reproducible and scalable method for the preparation of ‘artificial peroxidase’ with tunable sizes and enhanced catalytic activity. Nanozymes modified with gelatin shell and functionalized with affine molecules were applied as labels in colorimetric immunoassays of prostate-specific antigen and tetanus antibodies, enabling detection of these analytes in the range of clinically relevant concentrations. Protein coating provides excellent colloidal stability of nanozymes in physiological conditions and stability upon long-term storage.

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Section: Resultscontrasting

confidence: 99%

Prussian Blue Nanozymes with Enhanced Catalytic Activity: Size Tuning and Application in ELISA-like Immunoassay

et al. 2022

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“…RKH nanoparticles were more saturated with potassium because they were synthesized in the presence of 0.1 M KCl. Opposite to the previous report [55], we did not observe a clear relationship between potassium content and catalytic activity of nanozymes (Figure 5D-F). Even if some dependence exists, in this study it was masked by other factors, first of all, the size difference between nanoparticles prepared in various conditions.…”

Section: Change Of Ratio Between Iron Salts and Hydrogen Peroxide Doe...contrasting

confidence: 99%

Prussian blue nanozymes with enhanced catalytic activity: size tuning and application in ELISA-like immunoassay

Khramtsov

Kropaneva

Минин

et al. 2022

Preprint

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Prussian blue nanozymes possessing peroxidase-like activity gather significant attention as alternatives to natural enzymes in therapy, biosensing, and environmental remediation. Recently, prussian blue nanoparticles with enhanced catalytic activity prepared by reduction of FeCl3/K3[Fe(CN)6] mixture have been reported. These nanoparticles were denoted as ‘artificial peroxidase’ nanozymes. Our study provides insights into the process of synthesis of ‘artificial peroxidase’ nanozymes. We studied how the size of nanozymes and synthesis yield can be controlled via adjustment of the synthesis conditions. Based on these results, we developed a reproducible and scalable method for the preparation of ‘artificial peroxidase’ with tunable sizes allowing the obtaining of nanozymes with enhanced catalytic activity. ‘Artificial peroxidase’ nanozymes modified with gelatin shell and functionalized with affine molecules were applied as labels in colorimetric immunoassays of prostate-specific antigen and tetanus antibodies, enabling detection of these analytes in the range of clinically relevant concentrations. Protein coating provides excellent colloidal stability of nanozymes in physiological conditions and stability upon long-term storage.

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“…One method to stabilize PB analogs viz., titanium ferrocyanide and curb leaching of cyanide and 137 Cs + includes transforming the spent material into lithium titanate, which consequently immobilizes the 137 Cs [89]. In some studies, the release of iron from PB in Fenton type reactions were studied by Doumic et al [90]. They studied the catalytic effect in a pH = 3 environment and have observed that insoluble PB nanocomposites were more stable and showed negligible Fe release (10% after 13 cycles).…”

Section: Toxicity Of Nanomaterialsmentioning

confidence: 99%

Towards the Extraction of Radioactive Cesium-137 from Water via Graphene/CNT and Nanostructured Prussian Blue Hybrid Nanocomposites: A Review

Rauwel

2019

Nanomaterials

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Cesium is a radioactive fission product generated in nuclear power plants and is disposed of as liquid waste. The recent catastrophe at the Fukushima Daiichi nuclear plant in Japan has increased the 137Cs and 134Cs concentrations in air, soil and water to lethal levels. 137Cs has a half-life of 30.4 years, while the half-life of 134Cs is around two years, therefore the formers’ detrimental effects linger for a longer period. In addition, cesium is easily transported through water bodies making water contamination an urgent issue to address. Presently, efficient water remediation methods towards the extraction of 137Cs are being studied. Prussian blue (PB) and its analogs have shown very high efficiencies in the capture of 137Cs+ ions. In addition, combining them with magnetic nanoparticles such as Fe3O4 allows their recovery via magnetic extraction once exhausted. Graphene and carbon nanotubes (CNT) are the new generation carbon allotropes that possess high specific surface areas. Moreover, the possibility to functionalize them with organic or inorganic materials opens new avenues in water treatment. The combination of PB-CNT/Graphene has shown enhanced 137Cs+ extraction and their possible applications as membranes can be envisaged. This review will survey these nanocomposites, their efficiency in 137Cs+ extraction, their possible toxicity, and prospects in large-scale water remediation and succinctly survey other new developments in 137Cs+ extraction.

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“Soluble” vs. “insoluble” Prussian blue based catalysts: influence on Fenton-type treatment

Abstract: The influence of the synthesis procedure of supported Prussian blue nanoparticles (PBNP) on their activity and stability as a Fenton-type catalyst is studied.

Cited by 17 publications

References 25 publications

Prussian Blue Nanozymes with Enhanced Catalytic Activity: Size Tuning and Application in ELISA-like Immunoassay

Prussian Blue Nanozymes with Enhanced Catalytic Activity: Size Tuning and Application in ELISA-like Immunoassay

Prussian blue nanozymes with enhanced catalytic activity: size tuning and application in ELISA-like immunoassay

Towards the Extraction of Radioactive Cesium-137 from Water via Graphene/CNT and Nanostructured Prussian Blue Hybrid Nanocomposites: A Review

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