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Cited by 39

The DOI matches its Crossref record; 48 of the 48 references it cites were found in a registry or an index.

Degradation of the Reactive Blue 4 Dye in Aqueous Solution Using Zero-Valent Copper Nanoparticles

Marcelo, Cristiana Resende, Puiatti, Gustavo Alves, Nascimento, Mayra Aparecida, Oliveira, André F., Lopes, Renata P.·2018·Journal of Nanomaterials
DOI 10.1155/2018/4642038
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Abstract

The degradation of the Reactive Blue 4 (RB4) dye by zero-valent copper nanoparticles (nZVC) was investigated. Degradation rates of approximately 90% were reached within 10 minutes of reaction. Total Organic Carbon (TOC) analysis shows that the dye molecules undergo mineralization, therefore indicating the degradation process is oxidative. Experimental tests, held in the presence of tertiary butyl alcohol, acting as a hydroxyl radicals (∙OH) captor, and copper (I) oxide, demonstrated that the reaction mechanism is governed by the concentration of Cu (I) instead of ∙OH. The second-order kinetics model was the most appropriate one to explain the experimental data. Higher values of the reaction rate constant were obtained in higher temperatures and higher nZVC doses and in lower RB4 initial concentrations. The initial pH in more acidic conditions (3 and 4) was kinetically more favorable to the degradation reaction; the activation energy was estimated to be 42 kJ mol−1 based on calculations using the experimental data. Finally, the recovered nanoparticles were utilized on a new reaction cycle, showing a small loss of their efficiency and catalytic activity.

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Figures

Figure 1 Transmission electron microscope (TEM) images of zero-valent copper nanoparticles in different scales: 200 nm, 100 nm, and 50 nm, respectively.
Figure 1 Transmission electron microscope (TEM) images of zero-valent copper nanoparticles in different scales: 200 nm, 100 nm, and 50 nm, respectively.CC-BY · From the PDF
Figure2 UV-Visspectra of the RB4 dye during the reaction by zerovalent copper nanoparticles. Experimental conditions: 𝐶 0 = 15,0 mg L -1 ; nZVC dosage = 2,00 g L -1 ; 𝑇 = 25 ∘ C.
Figure2 UV-Visspectra of the RB4 dye during the reaction by zerovalent copper nanoparticles. Experimental conditions: 𝐶 0 = 15,0 mg L -1 ; nZVC dosage = 2,00 g L -1 ; 𝑇 = 25 ∘ C.CC-BY · From the PDF
Figure 3 Effect of different reaction conditions on the degradation of RB4 dye by zero-valent copper nanoparticles: ' ◼ ': presence of TBA (1,0 mmol L -1 ); ' e ': no scavenger (without the presence of TBA); ' 󳵳 ': under oxic conditions (with bubbling of synthetic air); ' 󳶃 ': under anoxic conditions (nitrogen atmosphere). Experimental conditions: 𝐶 0 = 15,0 mg L -1 ; nZVC dosage = 1,00 g L -1 ; 𝑇 = 25 ∘ C.
Figure 3 Effect of different reaction conditions on the degradation of RB4 dye by zero-valent copper nanoparticles: ' ◼ ': presence of TBA (1,0 mmol L -1 ); ' e ': no scavenger (without the presence of TBA); ' 󳵳 ': under oxic conditions (with bubbling of synthetic air); ' 󳶃 ': under anoxic conditions (nitrogen atmosphere). Experimental conditions: 𝐶 0 = 15,0 mg L -1 ; nZVC dosage = 1,00 g L -1 ; 𝑇 = 25 ∘ C.CC-BY · From the PDF
Figure 4 Effect of different sources of Cu (I) on the degradation of RB4 dye: ' ◼ ': nZVC and ' 󳵳 ': cupper (I) oxide. Experimental conditions: 𝐶 0 = 15,0 mg L -1 ; Cu dosage = 1,00 g L -1 ; 𝑇 = 25 ∘ C.
Figure 4 Effect of different sources of Cu (I) on the degradation of RB4 dye: ' ◼ ': nZVC and ' 󳵳 ': cupper (I) oxide. Experimental conditions: 𝐶 0 = 15,0 mg L -1 ; Cu dosage = 1,00 g L -1 ; 𝑇 = 25 ∘ C.CC-BY · From the PDF
Figure 5 Linear curves of the kinetic models for RB4 degradation by nZVC: (a) first order and (b) second order. Experimental conditions: 𝐶 0 = 15,0 mg L -1 ; nZVC dosage = 2,00 g L -1 ; 𝑇 = 25 ∘ C.
Figure 5 Linear curves of the kinetic models for RB4 degradation by nZVC: (a) first order and (b) second order. Experimental conditions: 𝐶 0 = 15,0 mg L -1 ; nZVC dosage = 2,00 g L -1 ; 𝑇 = 25 ∘ C.CC-BY · From the PDF
Figure 6 Degradation kinetics effect of RB4 by nZVC: (a) nZVC nanoparticle dosage effect and (b) initial RB4 concentration effect.
Figure 6 Degradation kinetics effect of RB4 by nZVC: (a) nZVC nanoparticle dosage effect and (b) initial RB4 concentration effect.CC-BY · From the PDF
Figure 7 (a) Effect of temperature on the kinetic of RB4 by nZVC and (b) Arrhenius plot for degradation of RB4 by nZVC.
Figure 7 (a) Effect of temperature on the kinetic of RB4 by nZVC and (b) Arrhenius plot for degradation of RB4 by nZVC.CC-BY · From the PDF
Figure 8 Effect of initial pH on the degradation kinetics of RB4 by nZVC. Experimental conditions: 𝐶 0 = 15,0 mg L -1 ; nZVC dosage = 1,00 g L -1 ; 𝑇 = 25 ∘ C.
Figure 8 Effect of initial pH on the degradation kinetics of RB4 by nZVC. Experimental conditions: 𝐶 0 = 15,0 mg L -1 ; nZVC dosage = 1,00 g L -1 ; 𝑇 = 25 ∘ C.CC-BY · From the PDF
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Metadata

Authors
Marcelo, C. R., Puiatti, G. A., Nascimento, M. A., Oliveira, A. F., & Lopes, R. P.
Venue
Journal of Nanomaterials
Publisher
Wiley
Published
2018
Volume
2018
Pages
1-9
ISSN
  • 1687-4110
  • 1687-4129
DOI
10.1155/2018/4642038
Cited by
39
References
48
Language
en
Licence
creativecommons.org/licenses/by/4.0/ (unspecified)
Funders
  • CNPq/FAPEMIG (793988/2013, 449909/2014-0)
  • Fundação de Amparo à Pesquisa do Estado de Minas Gerais (793988/2013, 449909/2014-0)
  • Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (793988/2013, 449909/2014-0)
  • Conselho Nacional de Desenvolvimento Científico e Tecnológico (793988/2013, 449909/2014-0)

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Bibliographic data: Semantic Scholar, OpenAlex, Crossref.

Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.