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Parametry strukturalne błękitu pruskiego na tle innych sorbentów pochodzenia naturalnego i antropogenicznego

Gajda Aleksandra, Sierant Anna, Jodłowski Przemysław

Prace Instytutu Mechaniki Górotworu PAN

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2022

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T. 24, nr 1-4

37--44

PL

W artykule zaprezentowano wyniki badań niskociśnieniowej adsorpcji gazowej błękitu pruskiego z użyciem N2 jako adsorbatu w celu określenia parametrów strukturalnych oraz CO2 w celu określenia parametrów sorpcyjnych. Zgodnie z danymi literaturowymi błękit pruski pod względem adsorpcji kationów porównywany jest do zeolitów, a jego struktura krystaliczna do MOFów. Z uwagi na ten fakt przeprowadzono badania porównawcze, wyznaczając parametry strukturalne zeolitu SN oraz MOFa MIL-140. Powierzchnia właściwa modelu adsorpcji wielowarstwowej BET dla błękitu pruskiego dla zoptymalizowanej temperatury odgazowania osiągnęła wartość 85,02 m2/g, przy całkowitej pojemności sorpcyjnej BET 19,53 cm3/g, co pozwoliło na uszeregowanie go jako sorbentu pomiędzy zeolitem a MOFem. Otrzymane wyniki porównano także z pracami innych autorów.

EN

This paper presents the results of a low-pressure gas adsorption study of Prussian blue using N2 as adsorbate to determine structural parameters and CO2 to determine sorption parameters. According to the literature, Prussian blue is compared to zeolites in terms of cation adsorption, and its crystal structure to MOFs. In view of this fact, a comparative study was carried out, determining the structural parameters of zeolite SN and MOF MIL-140. The specific surface area of the BET multilayer adsorption model for Prussian blue for the optimized degassing temperature reached 85.02 m2, with a total sorption capacity (BET) of 19.53 cm3/g, which allowed it to be ranked as a sorbent between zeolite and MOF. The obtained results were also compared with the works of other authors.

2

Enzymy w chemii analitycznej

Koncki R.

Wiadomości Chemiczne

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2015

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[Z] 69, 9-10

653--670

EN

There are three main fields of modern analytical chemistry where enzymes are presented: (1) biorecognition, biosensing and biodetection schemes, especially important in case of biosensors, (2) enzymes as analytes, and (3) enzymes as markers in immune- and genoanalysis. These analytical fields could be illustrated by the research of bioanalytics group supervised by professor Stanisław Głąb.

3

Prussian-blue based hydrogen peroxide sensors: two types of ascorbate interference

Malinauskas A., Mickeviciute G., Araminaite R., Garjonyte R.

Chemia Analityczna

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2006

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Vol. 51, No. 5

809-818

EN

Prussian-blue modified electrodes have been studied as electrochemical transducers for hydrogen peroxide and ascorbale. Two types of ascorbate bias have been identified in hydrogen peroxide assay. One type relates to the direct clectrocatalytic oxidation of ascorbate. This bias can be eliminated by: (i) covering the PB layer with a selective Nation coating; then, the signal of ascorbate is diminished almost to zero within a broad range of potentials -up to 0.2 V v.s Ag/AgCI, or (ii) by decreasing the potential to 0.0 or--0.05 V to suppress significantly the cathodic discharge of the ascorbate. The second type of bias is caused by chemical interaction between ascorbate and hydrogen peroxide and can not be eliminated by any of the above two approaches; thus, new methods are required for this purpose.

PL

Elektrody modyfikowane błękitem pruskim (BP) zastosowano jako elektrochemiczne przetworniki w przypadku nadtlenku wodoru i askorbinianów. Przy oznaczaniu nadtlenku wodoru |ony askorbinowe powodowały dwa rodzaje odchyleń. Jedno z nich jest związane /, bezpośrednim utlenieniem tych jonów. To odchylenie można wyeliminować przez; (i) pokrycie warstwy BP selektywną błonką Nafionu, co powoduje zmniejszenie sygnału jonów askorbinowych prawie do zera w szerokim zakresie potencjałów, do 0,2 V w Ag/AgCl, lub (ii) zmniejszenie potencjału do 0,0 lub -0.05 V i znaczne ograniczenie katodowego rozładowania tych jonów. Drugi rodzaj odchyleń w analizie jest spowodowany oddziaływaniem chemicznym między jonem askorbinowym i nadtlenkiem wodoru. Do jego usunięcia jest potrzebna inna, nowa metoda. . '•

4

Two-Layer Structures of Ultra-Thin Metal Hexacyanoferrate Films: Charge Trapping Possibility of Application to Corrosion Protection

Miecznikowski K., Chojak M., Steplowska W., Makowski O., Kulesza P., Adamczyk L., Malik M., Gałkowski M., Bala H.

Polish Journal of Chemistry

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2004

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Vol. 78 / nr 9

1183-1193

EN

The possibility of fabrication of ultra-thin films of metal hexacyanoferrates, Prussian Blue, PB, and nickel hexacyanoferrate, NiHCNFe, by multiple sequential attachment of metal cations (self-assembled on 4-aminobenzoic acid monolayer) and hexacyanoferrate anions, has been demonstrated. These films can form a bilayer arrangement on glassy carbon when PB and NiHCNFe are deposited as inner and outer films, respectively. To avoid mixing of the NiHCNFe and PB redox sites, we introduce an polymer interlayer from poly(4-vinylpyridine) and Nafion. Since the outer NiHCNFe film is physically separated from the electrode surface, and it undergoes redox reactions at potentials characteristic of the inner PB film, an effect of the reversible charge state trapping (bistable switching) is observed. Astable bilayer structure can also be deposited on stainless steel. The whole concept may be of importance to corrosion protection since charge accumulated in the oxidized bilayer film tends to stabilize corrosion potential within passive range.

5

Electrochemical and Electrogravimetric Investigations of Prussian Blue on the Gold Electrode in the Presence of Tallium(I) Ions

Rutkowska I., Stroka J., Wrona P., Galus Z.

Polish Journal of Chemistry

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2004

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Vol. 78 / nr 5

711-721

EN

Electrode processes of Prussian Blue (PB), deposited on the gold electrode, have been investigated in potassium and thallium salts solutions, using electrogravimetric and cyclic voltammetric methods. It is shown, that both electrode processes of PB (reduction of PB to Everitt's salt and its oxidation to Berlin Yellow) undergo changes, when potassium ions are replaced by thallium(I) ones. In the presence of thallium, the formation of new redox system is observed, and Tl(I) acts as a counter-ion. The equilibrium constant of the reaction: K(I)PB + Tl(I) = Tl(I)PB + K(I) was estimated to be equal to K = (1.7_0.6)×104. At the same time almost 50% of the PB layer looses its electrochemical activity, whereas the remaining PB phase is electrochemically active. After transfer of the electrode to KNO3 solution, majority of inactivated layer recovers its previous activity. These findings are tentatively interpreted as a result of formation of two phases of PB with Tl(I): electrochemically active and inactive. Both phases are in equilibrium, and thallium ions could be replaced by potassium one. In the case of the Fe(CN) /63 4 electrode process (at more positive potentials), in the presence of Tl(I) irreversible deactivation occurs, since in KNO3 solution, no reactivation of the electrode process is observed.

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Mediation of Magnetic Interactions in Prussian Blue Family

Wasiutyński T., Bałanda M., Szeglowski Z., Zieliński P. M.

Polish Journal of Chemistry

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2002

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Vol. 76 / nr 2-3

377-384

EN

Results of the AC susceptibility and DC magnetization of the family ACo[Fe(CN)6] for different cations A: Li, Na, K, Rb, Cs,NH4, N(Et)4 are presented. Differences in magnetic properties are found that can be attributed to an indirect interaction mediated by the cations. Two other compounds: A2NiII[FeII(CN)6] (A = K, Na) were also studied. The strong influence on magnetic properties due to alkaline cations was again observed.