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Efficient hydrogen generation by ZnAl2O4 nanoparticles embedded on a flexible graphene composite.

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Title: Efficient hydrogen generation by ZnAl2O4 nanoparticles embedded on a flexible graphene composite.
Authors: Diaz-Torres, L.A.1 (AUTHOR), Mtz-Enriquez, A.I.2 (AUTHOR), Garcia, C.R.3 (AUTHOR), Coutino-Gonzalez, E.4 (AUTHOR), Oliva, A.I.5 (AUTHOR), Vallejo, M.A.6 (AUTHOR), Cordova, T.6 (AUTHOR), Gomez-Solis, C.1,6 (AUTHOR) gomez.c@ugto.mx, Oliva, J.1,7 (AUTHOR) jroliva@conacyt.mx
Source: Renewable Energy: An International Journal. Jun2020, Vol. 152, p634-643. 10p.
Subject Terms: *Hydrogen production, Interstitial hydrogen generation, Quantum dots, Polymeric membranes, Nanoparticles, Scanning electron microscopy
Abstract: This work reports the hydrogen generation properties of ZnAl 2 O 4 (ZAO) powders synthesized by a combustion method, which produced carbon dots (C-dots) on the ZAO surface. These ZAO nanoparticles decorated with C-dots were incorporated into a polyacrylate matrix to form a photocatalytic membrane (named PAZO), which was subsequently attached to a flexible graphene composite (FGC) to form a FGC/PAZO (GAZO) composite. The morphological analysis by scanning electron microscopy shows embedded ZAO nanoparticles with sizes of 20–90 nm into the polymeric matrix. In addition, hydrogen generation rates of 260, 4640 and 1580 μmol g−1 h−1 were obtained for different ZAO powders annealed at 600, 700, and 800 °C, respectively. Moreover, the PAZO membrane and the GAZO composite produced hydrogen generation rates of 560 and 2860 μmol g−1 h−1, respectively. Although the GAZO composite had a lower hydrogen generation rate (≈38% less) than the best ZAO powder (annealed at 700 °C), the GAZO composite could be attached easily in the inner wall of photocatalytic reactors which facilitates its removal after hydrogen production, this advantage is not possible by using photocatalytic powders. Therefore, the GAZO composites, presented here, could be a feasible option for hydrogen generation when attached to the inner walls of photoreactors. Image 1 • Flexible graphene composites (FGCs) were fabricated by a mold-casting method. • ZAO NPs were embedded on the FGCs using a polymeric membrane. • The maximum hydrogen generation rate produced by the FGCs was 2860 μmol g−1 h−1. • The FGCs can be used as a lining into photocatalytic reactors for H 2 generation. [ABSTRACT FROM AUTHOR]
Copyright of Renewable Energy: An International Journal is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Data: Efficient hydrogen generation by ZnAl2O4 nanoparticles embedded on a flexible graphene composite.
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  Data: <searchLink fieldCode="AR" term="%22Diaz-Torres%2C+L%2EA%2E%22">Diaz-Torres, L.A.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Mtz-Enriquez%2C+A%2EI%2E%22">Mtz-Enriquez, A.I.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Garcia%2C+C%2ER%2E%22">Garcia, C.R.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Coutino-Gonzalez%2C+E%2E%22">Coutino-Gonzalez, E.</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Oliva%2C+A%2EI%2E%22">Oliva, A.I.</searchLink><relatesTo>5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Vallejo%2C+M%2EA%2E%22">Vallejo, M.A.</searchLink><relatesTo>6</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Cordova%2C+T%2E%22">Cordova, T.</searchLink><relatesTo>6</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Gomez-Solis%2C+C%2E%22">Gomez-Solis, C.</searchLink><relatesTo>1,6</relatesTo> (AUTHOR)<i> gomez.c@ugto.mx</i><br /><searchLink fieldCode="AR" term="%22Oliva%2C+J%2E%22">Oliva, J.</searchLink><relatesTo>1,7</relatesTo> (AUTHOR)<i> jroliva@conacyt.mx</i>
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  Data: <searchLink fieldCode="JN" term="%22Renewable+Energy%3A+An+International+Journal%22">Renewable Energy: An International Journal</searchLink>. Jun2020, Vol. 152, p634-643. 10p.
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  Data: *<searchLink fieldCode="DE" term="%22Hydrogen+production%22">Hydrogen production</searchLink><br /><searchLink fieldCode="DE" term="%22Interstitial+hydrogen+generation%22">Interstitial hydrogen generation</searchLink><br /><searchLink fieldCode="DE" term="%22Quantum+dots%22">Quantum dots</searchLink><br /><searchLink fieldCode="DE" term="%22Polymeric+membranes%22">Polymeric membranes</searchLink><br /><searchLink fieldCode="DE" term="%22Nanoparticles%22">Nanoparticles</searchLink><br /><searchLink fieldCode="DE" term="%22Scanning+electron+microscopy%22">Scanning electron microscopy</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: This work reports the hydrogen generation properties of ZnAl 2 O 4 (ZAO) powders synthesized by a combustion method, which produced carbon dots (C-dots) on the ZAO surface. These ZAO nanoparticles decorated with C-dots were incorporated into a polyacrylate matrix to form a photocatalytic membrane (named PAZO), which was subsequently attached to a flexible graphene composite (FGC) to form a FGC/PAZO (GAZO) composite. The morphological analysis by scanning electron microscopy shows embedded ZAO nanoparticles with sizes of 20–90 nm into the polymeric matrix. In addition, hydrogen generation rates of 260, 4640 and 1580 μmol g−1 h−1 were obtained for different ZAO powders annealed at 600, 700, and 800 °C, respectively. Moreover, the PAZO membrane and the GAZO composite produced hydrogen generation rates of 560 and 2860 μmol g−1 h−1, respectively. Although the GAZO composite had a lower hydrogen generation rate (≈38% less) than the best ZAO powder (annealed at 700 °C), the GAZO composite could be attached easily in the inner wall of photocatalytic reactors which facilitates its removal after hydrogen production, this advantage is not possible by using photocatalytic powders. Therefore, the GAZO composites, presented here, could be a feasible option for hydrogen generation when attached to the inner walls of photoreactors. Image 1 • Flexible graphene composites (FGCs) were fabricated by a mold-casting method. • ZAO NPs were embedded on the FGCs using a polymeric membrane. • The maximum hydrogen generation rate produced by the FGCs was 2860 μmol g−1 h−1. • The FGCs can be used as a lining into photocatalytic reactors for H 2 generation. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Renewable Energy: An International Journal is the property of Pergamon Press - An Imprint of Elsevier Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.renene.2020.01.074
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        Text: English
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        PageCount: 10
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    Subjects:
      – SubjectFull: Hydrogen production
        Type: general
      – SubjectFull: Interstitial hydrogen generation
        Type: general
      – SubjectFull: Quantum dots
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      – SubjectFull: Polymeric membranes
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      – SubjectFull: Nanoparticles
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      – SubjectFull: Scanning electron microscopy
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              Text: Jun2020
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