Potential-pH Diagrams for Oxidation-State Control of Nanoparticles Synthesized via Chemical Reduction

Yagi, Shunsuke

doi:10.5772/21548

Cited by 12 publications

(16 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Then, further reduction of CuO NPs can be carried out with abundant amount of hydrazine. On the other hand, Yagi [34] and Zhang et al [55] reported that Cu 2 O NPs could be obtained using NaBH 4 if enough amount of PVP in the media was used:…”

Section: Effect Of Reducing Agentmentioning

confidence: 99%

“…Also, a simultaneous oxidation reaction of cuprite to tenorite can be carried out according to Equation (8). In addition, as Yagi [34] and Zhang et al [55] reported, it was possible to obtain cuprite using NaBH 4 as the reducing agent if a suitable volume of PVP was used (Equation 11). A similar X-ray spectrum of NPs indicating the presence of two crystalline phases, monoclinic cupric oxide (CuO) and cubic cuprous oxides (Cu 2 O) was reported by Abboud et al [64].…”

Section: Effect Of Sodium Borohydride Nabhmentioning

confidence: 99%

“…Synthesis of nanosized copper oxide particles with different morphologies and sizes using different routes have been reported [19]. Some methods of synthesis include thermal decomposition [5,20], calcination [21], pyrolysis [22], sonochemistry [23], electrochemistry [7,24,25], microwave irradiation [26][27][28], precipitation [29][30][31][32][33][34], reduction [16,[34][35][36][37][38][39][40], reverse micelles [41], sol-gel [42] and self-assembled [43,44]. Along with those methods, the simple process involving a reduction of copper salts has been well developed [30,45].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of the Concentration of NaBH4 and N2H4 as Reductant Agent on the Synthesis of Copper Oxide Nanoparticles and its Potential Antimicrobial Applications

Guzmán¹,

Arcos²,

Dille³

et al. 2018

Nano BioMed ENG

View full text Add to dashboard Cite

The antibacterial activity of various nanoparticles is gaining increasing interest due to its potential medical applications. In this work, we presented the synthesis of copper oxide nanoparticles prepared by chemical reduction from aqueous solutions of copper sulfate (CuSO 4) with sodium borohydride (NaBH 4) and hydrazine hydrate (N 2 H 4) as reductant and polyvinylpyrrolidone (PVP) as stabilizer. The X-ray diffraction spectra showed the formation of tenorite (CuO) and cuprite (Cu 2 O) nanoparticles when different ratios of CuSO 4 /NaBH 4 and CuSO 4 /N 2 H 4 were used. Photographs obtained by transmission electron microscopy (TEM) showed agglomerates of grains with a narrow size distribution (from 20 to 70 nm), whereas the radii of the individual particles were between 2 and 20 nm. Smaller nanoparticles and narrower particle size distributions were obtained when NaBH 4 was used. The results of antibacterial activity using the Kirby-Bauer method showed that nanoparticles obtained with NaBH 4 presented a reasonable bactericidal activity. Pseudomonas aureginosa and Staphylococcus aureus were more susceptible to the particle size than Escherichia coli. In addition, with small amounts of Cu 2 O in samples of CuO nanoparticles, the antibacterial susceptibility against Pseudomonas aureginosa was improved. Finally, nanoparticles of CuO incorporated into cotton by applying ultrasound waves remained impregnated after five washes.

show abstract

Section: Effect Of Reducing Agentmentioning

confidence: 99%

Section: Effect Of Sodium Borohydride Nabhmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of the Concentration of NaBH4 and N2H4 as Reductant Agent on the Synthesis of Copper Oxide Nanoparticles and its Potential Antimicrobial Applications

Guzmán¹,

Arcos²,

Dille³

et al. 2018

Nano BioMed ENG

View full text Add to dashboard Cite

show abstract

“…In situ monitoring of mixed potential during synthesis, in combination with thermodynamic calculations, would offer a deeper understanding on the effect of experimental conditions on the stability of various Cu species in the solution [12][13]. Such study would provide an insight on the most stable chemical Cu species for a particular solution condition, without the need for expensive characterizations like SEM and XRD.…”

Section: Introductionmentioning

confidence: 99%

“…The mixed potential is the potential at the point where the sum of all the anodic currents (I a ) and cathodic currents (I c ) due to all partial anodic and cathodic reactions become equal [12][13]. The stable Cu species can be determined when potential-pH diagrams are constructed based on current solution condition and then compared to the kinetically measured mixed potential.…”

mentioning

confidence: 99%

Electrochemical Investigation on the Formation of Cu Nanowires by Electroless Deposition

Felizco

Balela

2015

MATEC Web of Conferences

View full text Add to dashboard Cite

Abstract. The growth of copper (Cu) nanowires by electroless deposition in aqueous solution at 60-80 °C was studied from an electrochemical perspective using in situ mixed potential measurements and potential-pH diagrams. Scanning Electron Microscopy (SEM) showed that thick and short nanowires were obtained at high temperatures, while long and thin nanowires result from low reaction temperatures. In situ mixed potential measurements reveal that Cu(II) reduction is more favored at higher reaction temperatures, hastening the reduction reaction. The fast reaction leads to a high concentration of Cu atoms in the solution. As a result, Cu deposition occurs rapidly, such that they attached on both sides and ends of the primary Cu nanowires. This results to the formation of thick and short structures. On the other hand, thin and long nanowires are obtained due to the slow reduction reaction, which gives the Cu atoms more time to orderly attach in a wire-like formation.

show abstract

Electrochromism in CuWO4 and WO3 thin films synthesized by combined electrochemical and chemical methods

Smilyk

Fomanyuk

Rusetskyi

et al. 2022

Ionics

View full text Add to dashboard Cite

Potential-pH Diagrams for Oxidation-State Control of Nanoparticles Synthesized via Chemical Reduction

Cited by 12 publications

References 41 publications

Effect of the Concentration of NaBH4 and N2H4 as Reductant Agent on the Synthesis of Copper Oxide Nanoparticles and its Potential Antimicrobial Applications

Effect of the Concentration of NaBH4 and N2H4 as Reductant Agent on the Synthesis of Copper Oxide Nanoparticles and its Potential Antimicrobial Applications

Electrochemical Investigation on the Formation of Cu Nanowires by Electroless Deposition

Electrochromism in CuWO4 and WO3 thin films synthesized by combined electrochemical and chemical methods

Contact Info

Product

Resources

About