A green synthesis of copper nanoparticles using native cyclodextrins as stabilizing agents

Suárez-Cerda, Javier; Espinoza-Gómez, Heriberto; Alonso-Núñez, G.; Rivero, Ignacio A.; Gochi-Ponce, Y.; Flores-López, Lucı́a Z.

doi:10.1016/j.jscs.2016.10.005

Cited by 126 publications

(44 citation statements)

References 43 publications

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“…Copper nanoparticles were synthesized by leaf extract of Aloe vera plant. Phenolic content in plant extracts dissolved in water, degradable and used to catalyzed synthesis of the nanoparticle as capping and reducing agent [10].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Congo Red (Acid Red 28) Azodye on Biosynthesized Copper Oxide Nanoparticles

et al. 2019

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A green synthesis of copper oxide nanoparticles and its removal efficiency of azodye were studied. Biosynthesis of stable copper oxide nanoparticles were preformed using Aloe barbadensis leaf extract as a size and shape-directing agent for preparing of spherical copper oxide nanoparticles by calcination at 400 °C. The leaf extract of Aloe barbadensis was prepared in deionized water. The produced copper particles were calcined at 400 °C to produce copper oxide nanoparticles. The characterization of copper oxide nanoparticles was performed by XRD, SEM, FTIR, UV spectroscopy. The XRD analysis showed that the average particle size was between 5-30 nm. The shape of the copper oxide nanoparticles was spherical and cubic. EDX of the synthesized nanoparticles showed the composition consists of 68 % copper. The UV-visible spectrum analysis confirms an absorption peak at 200-400 nm of the produced CuO nanoparticles. The FTIR analysis of the copper oxide particles indicate the presence of the organometallic Cu-O bond between Cu and O. The obtained copper oxide was used as a removing agent of Congo red dye. The effect of variables like concentration, time, pH, adsorbent dosage were studied. It was observed from the results that the maximum dye removal occurs at pH of 4, the concentration of nanoparticles was 1 mg/L and the maximum time for dye removal was 120 min. The Langmuir isotherm model was calculated to study the adsorption efficiency of the Congo red dye on the produced copper oxide nanoparticles. The kinetics of pseudo second order is followed by adsorption. The calculated sum of square was 0.012 and r 2 = 0.98. it was observed that the model fit the best and straight line with r 2 value of 0.991 and probability value of 1.6E-5. The nanoparticles remove 70 % of the Congo red dye from its solution. This showed that the copper oxide nanoparticles has efficient capacity of azodye degradation.

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Section: Introductionmentioning

confidence: 99%

Adsorption of Congo Red (Acid Red 28) Azodye on Biosynthesized Copper Oxide Nanoparticles

et al. 2019

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“…This could be because of the antibacterial potency and biocidal properties of the Cu nanoparticles. The weight percentage of nanometer Cu reached 2.23% (Fig. (d), Table S2) in the EDS spot (Fig.…”

Section: Resultsmentioning

confidence: 98%

“…9 The reductive transformation of nitroaromatics on the surface of non-noble metal catalysts such as copper (Cu) nanoparticles attracted considerable attention owing to the excellent catalytic efficiency and lower cost of preparation of such catalysts. [10][11][12][13][14][15][16] Copper nanoparticles with a high surface-to-volume ratio can dramatically enhance the number of active sites per unit area in the catalysts. 17 However, owing to their high surface energy, they have a strong tendency to agglomerate, and this reduces their catalytic ability considerably.…”

Section: Introductionmentioning

confidence: 99%

Biosynthesis of Cu nanoparticles supported on carbon nanotubes and its catalytic performance under different test conditions

Huang

Shi

2020

J of Chemical Tech & Biotech

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BACKGROUND 4‐Nitrophenol (4‐NP) is used widely in pesticides and other areas, but it can cause adverse environmental effects. Thus, it is desirable to convert it to 4‐aminophenol (4‐AP). Microbial synthesis of nanomaterials has the characteristics of low cost and effective control of secondary pollution. The catalytic performance of biosynthesized nanocomposites of copper (Cu) and carbon nanotubes (CNTs) in reducing 4‐NP to 4‐AP was evaluated. RESULTS Here, Cu nanoparticles were supported in situ on CNT nanocomposites via Shewanella oneidensis MR‐1 to form Cu/CNT nanocomposites. The prepared Cu/CNTs nanocomposites were characterized by transmission electron microscopy, X‐ray photoelectron spectroscopy, Raman spectrometry, and energy dispersed X‐ray spectroscopy. The findings showed that the Cu nanoparticles were successfully synthesized on the surface of the CNTs and that they had a typical diameter of 4 to 10 nm and high crystallinity. The catalytic performance of the nanocomposites for the reduction of 4‐NP was evaluated under different initial concentrations of Cu/CNT, pH, and temperatures. The best catalytic performance, in which 99.5% 4‐NP was reduced, was obtained with 3 wt% Cu/CNT at 45 °C and pH of 10 within 80 min. Accordingly, 4‐NP degradation followed first‐order kinetics, and the rate constant (k) has been calculated to be 0.0532 min−1. The Cu/CNT nanocomposite exhibited high stability catalytic efficiency at 95.2% even after six reaction cycles. CONCLUSION The study demonstrates an environmentally friendly method for synthesizing non‐noble metal nanocomposites and using them for the catalytic reduction of 4‐NP. The method could be applied to prepare other efficient and reusable metallic nanocatalysts. © 2020 Society of Chemical Industry

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“…A great advantage is the use of aqueous solutions instead of any surfactants, additive reagent, or posttreatment in the nanoparticles and CNS synthesis. The preparation of sulfide chalcogenides as reference Pt x S y , Pt x W y S z , and Pt x Mo y S z catalysts were carried out only with water and at room temperature [19,20] as well as other synthesis methods to produce CNS such as graphene or MWCNTs and nanoparticles, recently cupper nanoparticles, for instance [42].…”

Section: Green Chemistrymentioning

confidence: 99%

Chalcogenides and Carbon Nanostructures: Great Applications for PEM Fuel Cells

Gochi-Ponce¹,

Alonso-Núñez²,

Alonso‐Vante³

et al. 2018

Proton Exchange Membrane Fuel Cell

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Nanostructured metal chalcogenides (NMCs) and carbon nanostructures (CNS) are attracting significant attention due to their features such as high stability in an acidic environment, especially if they have a significant oxygen reduction activity and remarkable superconducting properties. The broad range of CNS exhibits novel physicochemical properties, and thus it is triggering intense research about carbon nanoscience with numerous applications. In this context, new synthesis routes are designed under moderate conditions, which are definitely needed in order to simplify the process, reduce costs, and allow the production of NMCs at lower temperatures and CNS whose size and shape can be controlled. Some related studies about Pt based on sulfides and selenides, transition metal chalcogenides (TMCs), and carbon nanostructures (nanotubes and graphene) are revealed here; however, they show promise for fuel cells that these NMCs, CNS, or even NMC-CNS materials have been applied for other energy devices. Until now, a good response for cathodic reactions is employing TMCs based on tungsten and CNS without metal. According to experimental results and in terms of catalytic activity, durability, and chemical/electrochemical stability, much more research is required to produce commercially valid non-noble catalysts, electrocatalysts, or supports; however, one approach on this field is metal-free CNS.

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A green synthesis of copper nanoparticles using native cyclodextrins as stabilizing agents

Cited by 126 publications

References 43 publications

Adsorption of Congo Red (Acid Red 28) Azodye on Biosynthesized Copper Oxide Nanoparticles

Adsorption of Congo Red (Acid Red 28) Azodye on Biosynthesized Copper Oxide Nanoparticles

Biosynthesis of Cu nanoparticles supported on carbon nanotubes and its catalytic performance under different test conditions

Chalcogenides and Carbon Nanostructures: Great Applications for PEM Fuel Cells

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