Synthesis of gold nanoparticles in an interdigital micromixer using ascorbic acid and sodium borohydride as reducers

Luty–Błocho, Magdalena; Fitzner, K.; Hessel, Volker; Löb, Patrick; Maskos, Michael; Metzke, D.; Pacławski, K.

doi:10.1016/j.cej.2011.03.104

Cited by 90 publications

(53 citation statements)

References 96 publications

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“…The CVs of ceftriaxone at GCE are shown in Fig. 5 (inset), an oxidation peak was observed at 1.153 V, and a reduction peak at 0.900 V was observed, which was assigned to the sulfur atoms in ceftriaxone, CVs of GNP-modified GCE in the K 3 Fe(CN) 6 -K 4 Fe(CN) 6 system…”

Section: Cyclic Voltammograms Of Gnpsmentioning

confidence: 99%

“…The surface of functional groups (COOH, OH, SH, and NH 2 ) are suitable substrate for the deposition of GNPs [2][3][4][5]. The reduction of HAuCl 4 is the most used methods for the preparation of GNPs in aqueous solution; reductants such as ascorbic acid [6], citrate [7][8][9], and borohydride [10,11] have been used in this reaction. Electrochemical deposition of metal nanoparticles has been found a better alternative because of their flexibility in controlling the size and coverage of the metal nanoparticles [12,13].…”

Section: Introductionmentioning

confidence: 99%

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Experimental and theoretical study on the synthesis of gold nanoparticles using ceftriaxone as a stabilizing reagent for and its catalysis for dopamine

et al. 2012

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Electrochemical synthesis of gold nanoparticles on the surface of glassy carbon electrode and preparation of GNPs in aqueous solution using ceftriaxone as an innocuous stabilizing reagent were proposed. The gold nanoparticles were characterized by scanning electron microscopy, transmission electron microscopy, infrared spectrometry, UV spectrophotometry, powder X-ray diffraction, and cyclic voltammetry. The catalysis of gold nanoparticles on the glassy carbon electrode for dopamine was demonstrated. The results indicate that the modified electrode has an excellent repeatability and reproducibility. The relationship between the molecular structure and the dispersion of GNPs on the surface of GCE as well as the catalysis of GNPs for dopamine was discussed.

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Section: Cyclic Voltammograms Of Gnpsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental and theoretical study on the synthesis of gold nanoparticles using ceftriaxone as a stabilizing reagent for and its catalysis for dopamine

et al. 2012

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“…A reduction method can also be applied for precious metal recovery. For example, vitamin C [18,19], sodium borohydrate [20], DMAB [21][22][23], hydrazine [24], ethanol [25], and methanol [26] can be used as reductants. First of all, those methods are not selective, i.e.…”

Section: Introductionmentioning

confidence: 99%

Kinetic studies of the removal of Pt(IV) chloride complex ions from acidic aqueous solutions using activated carbon

Wojnicki

Socha

Fitzner

2017

Reac Kinet Mech Cat

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In this paper, results showing the possibility of activated carbon application in platinum recovery from aqueous solution are presented. The studies were performed with the commercially available activated carbon, and the results can be easily transferred directly to the industry. The influence of pH, mixing rate, and amount of activated carbon as well as platinum(IV) initial concentration on the rate of adsorption was investigated. It was shown that after adsorption platinum is present on the surface of activated carbon in two oxidation states, ?2 and ?4, where shares of those forms are equal to 47 and 53%. Moreover, the enthalpy and entropy of activation were determined and are equal to 16.14 ± 075 kJ mol -1 and 42.19 ± 0.28 J mol -1 K -1 .

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“…The reduction of Au(III) to Au(I) with Vitamin C is very fast but formation of colloidal gold in the batch takes about half an hour. The same process takes a few seconds in a micromixer [21]. However, the reduction reaction of Pt(IV) ions to Pt(0) with Vitamin C is very slow.…”

Section: Introductionmentioning

confidence: 99%

“…Depending on the nature of the reductant ("weak" or "strong") and the type of used stabilization (electrostatic, steric), it is possible to produce stable MNPs of different size. The reduction of metal ions with strong reducing agent such as hydrogen [17][18][19][20], sodium borohydride [21,22], hydrazine [23], ethanol [24], etc. is usually carried out at room temperature and does not require special conditions.…”

Section: Introductionmentioning

confidence: 99%

The Synthesis of Stable Platinum Nanoparticles in the Microreactor

Luty–Błocho

Grzonka

Kurzydłowski

2014

Archives of Metallurgy and Materials

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In this work, the synthesis of the spherical clusters containing 3-4 nm platinum nanoparticles enclosed in a polymer capsule is described. The process of nanoparticles formation was intensified by using a microreactor. The application of microreactor enabled us to shorten the time of redox reaction and nucleation stage up to 6 seconds at 105• C in comparison with the process carried out in a batch reactor at 40• C. Using Vitamin C as a bio-reducer of platinum(IV) complexes and biocompatible polymers, the products non-toxic and environmentally friendly, stable for at least 9 months, were obtained. Presented procedure for nanoparticles synthesis seems to be an alternative method for platinum recovery from solutions containing platinum(IV) chloride complex ions.Keywords: platinum nanoparticle, microreactor, Vitamin C, steric stabilization W pracy, przedstawiono syntezę sferycznych klastrów zawierających 3-4 nm nanocząstki platyny zamknięte w polimerowej otoczce. Proces formowania nanocząstek platyny został zintensyfikowany poprzez użycie mikroreaktora. Użycie mikroreaktora skróciło czas reakcji redukcji oraz etapu zarodkowania do 6 s w temperaturze 105• C w porównaniu do procesu przeprowadzonego w reaktorze okresowym w temperaturze 40• C. Użycie witaminy C jako bioreduktora chlorkowych kompleksów platyny(IV) oraz biokompatybilnego polimeru pozwala na uzyskanie nietoksycznych oraz stabilnych przez co najmniej 9 miesięcy produktów. Przedstawiona metoda syntezy nanocząstek może stanowić alternatywny sposób odzysku platyny z roztworów zawierających jej chlorkowy kompleks.

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Synthesis of gold nanoparticles in an interdigital micromixer using ascorbic acid and sodium borohydride as reducers

Cited by 90 publications

References 96 publications

Experimental and theoretical study on the synthesis of gold nanoparticles using ceftriaxone as a stabilizing reagent for and its catalysis for dopamine

Experimental and theoretical study on the synthesis of gold nanoparticles using ceftriaxone as a stabilizing reagent for and its catalysis for dopamine

Kinetic studies of the removal of Pt(IV) chloride complex ions from acidic aqueous solutions using activated carbon

The Synthesis of Stable Platinum Nanoparticles in the Microreactor

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