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Well-Designed Au Nanorod-Doped Cu(2)O Core–Shell Nanocube-Embedded Reduced Graphene Oxide Composite for Efficient Removal of a Water Pollutant Dye

[Image: see text] To ensure environmental safety, the removal of organic pollutants has gained increasing attention globally. We have synthesized uniform Au nanorod (NR)-doped Cu(2)O core–shell nanocubes (CSNCs) via a seed-mediated route embedded on the surface of rGO sheets. The Au NRs@Cu(2)O/rGO n...

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Autores principales: Mahajan, Hansa, Arumugasamy, Shiva Kumar, Panda, Atanu, Sada, Venkateswarlu, Yoon, Minyoung, Yun, Kyusik
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2020
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7528314/
https://www.ncbi.nlm.nih.gov/pubmed/33015498
http://dx.doi.org/10.1021/acsomega.0c03487
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author Mahajan, Hansa
Arumugasamy, Shiva Kumar
Panda, Atanu
Sada, Venkateswarlu
Yoon, Minyoung
Yun, Kyusik
author_facet Mahajan, Hansa
Arumugasamy, Shiva Kumar
Panda, Atanu
Sada, Venkateswarlu
Yoon, Minyoung
Yun, Kyusik
author_sort Mahajan, Hansa
collection PubMed
description [Image: see text] To ensure environmental safety, the removal of organic pollutants has gained increasing attention globally. We have synthesized uniform Au nanorod (NR)-doped Cu(2)O core–shell nanocubes (CSNCs) via a seed-mediated route embedded on the surface of rGO sheets. The Au NRs@Cu(2)O/rGO nanocomposite was characterized using various techniques such as transmission electron microscopy (TEM), atomic force microscopy (AFM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Fourier-transform infrared (FT-IR) and Raman spectroscopies. The scanning TEM-energy-dispersive spectroscopy (STEM-EDS) elemental mapping of the AuNRs@Cu(2)O/rGO nanocomposite indicates that the Au NR (40 nm) is fully covered with the Cu(2)O particles (∼145 nm) as a shell. N(2) gas sorption analysis shows that the specific surface area of the composite is 205.5 m(2)/g with a mesoporous character. Moreover, incorporation of Au NRs@Cu(2)O CSNCs increases the nanogaps around the nanoparticles and suppresses the stacking/bundling of rGO, which significantly influences the pore size and increase the surface area. A batch adsorption experiment was carried out under various parameters, such as the effect of pH, contact time, temperature, initial dye concentration, and adsorbent dosage, for the removal of methylene blue (MB) in aqueous solution. The high surface area and mesoporosity can cause the adsorption capacity to reach equilibrium within 20 min with a 99.8% removal efficiency. Both kinetic and isotherm data were obtained and fitted very well with the pseudo-second-order kinetic and Langmuir isotherm model. The Langmuir isotherm revealed an excellent dye sorption capacity of 243.9 mg/g at 298 K. Moreover, after five adsorption cycles, the dye removal efficiency decreased from 99 to 86%. This novel route paves a new path for heterogeneous adsorbent synthesis, which is useful for catalysis and electrochemical applications.
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spelling pubmed-75283142020-10-02 Well-Designed Au Nanorod-Doped Cu(2)O Core–Shell Nanocube-Embedded Reduced Graphene Oxide Composite for Efficient Removal of a Water Pollutant Dye Mahajan, Hansa Arumugasamy, Shiva Kumar Panda, Atanu Sada, Venkateswarlu Yoon, Minyoung Yun, Kyusik ACS Omega [Image: see text] To ensure environmental safety, the removal of organic pollutants has gained increasing attention globally. We have synthesized uniform Au nanorod (NR)-doped Cu(2)O core–shell nanocubes (CSNCs) via a seed-mediated route embedded on the surface of rGO sheets. The Au NRs@Cu(2)O/rGO nanocomposite was characterized using various techniques such as transmission electron microscopy (TEM), atomic force microscopy (AFM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and Fourier-transform infrared (FT-IR) and Raman spectroscopies. The scanning TEM-energy-dispersive spectroscopy (STEM-EDS) elemental mapping of the AuNRs@Cu(2)O/rGO nanocomposite indicates that the Au NR (40 nm) is fully covered with the Cu(2)O particles (∼145 nm) as a shell. N(2) gas sorption analysis shows that the specific surface area of the composite is 205.5 m(2)/g with a mesoporous character. Moreover, incorporation of Au NRs@Cu(2)O CSNCs increases the nanogaps around the nanoparticles and suppresses the stacking/bundling of rGO, which significantly influences the pore size and increase the surface area. A batch adsorption experiment was carried out under various parameters, such as the effect of pH, contact time, temperature, initial dye concentration, and adsorbent dosage, for the removal of methylene blue (MB) in aqueous solution. The high surface area and mesoporosity can cause the adsorption capacity to reach equilibrium within 20 min with a 99.8% removal efficiency. Both kinetic and isotherm data were obtained and fitted very well with the pseudo-second-order kinetic and Langmuir isotherm model. The Langmuir isotherm revealed an excellent dye sorption capacity of 243.9 mg/g at 298 K. Moreover, after five adsorption cycles, the dye removal efficiency decreased from 99 to 86%. This novel route paves a new path for heterogeneous adsorbent synthesis, which is useful for catalysis and electrochemical applications. American Chemical Society 2020-09-16 /pmc/articles/PMC7528314/ /pubmed/33015498 http://dx.doi.org/10.1021/acsomega.0c03487 Text en This is an open access article published under an ACS AuthorChoice License (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes.
spellingShingle Mahajan, Hansa
Arumugasamy, Shiva Kumar
Panda, Atanu
Sada, Venkateswarlu
Yoon, Minyoung
Yun, Kyusik
Well-Designed Au Nanorod-Doped Cu(2)O Core–Shell Nanocube-Embedded Reduced Graphene Oxide Composite for Efficient Removal of a Water Pollutant Dye
title Well-Designed Au Nanorod-Doped Cu(2)O Core–Shell Nanocube-Embedded Reduced Graphene Oxide Composite for Efficient Removal of a Water Pollutant Dye
title_full Well-Designed Au Nanorod-Doped Cu(2)O Core–Shell Nanocube-Embedded Reduced Graphene Oxide Composite for Efficient Removal of a Water Pollutant Dye
title_fullStr Well-Designed Au Nanorod-Doped Cu(2)O Core–Shell Nanocube-Embedded Reduced Graphene Oxide Composite for Efficient Removal of a Water Pollutant Dye
title_full_unstemmed Well-Designed Au Nanorod-Doped Cu(2)O Core–Shell Nanocube-Embedded Reduced Graphene Oxide Composite for Efficient Removal of a Water Pollutant Dye
title_short Well-Designed Au Nanorod-Doped Cu(2)O Core–Shell Nanocube-Embedded Reduced Graphene Oxide Composite for Efficient Removal of a Water Pollutant Dye
title_sort well-designed au nanorod-doped cu(2)o core–shell nanocube-embedded reduced graphene oxide composite for efficient removal of a water pollutant dye
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7528314/
https://www.ncbi.nlm.nih.gov/pubmed/33015498
http://dx.doi.org/10.1021/acsomega.0c03487
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