Highly Efficient Photocatalysis by Zinc Oxide-Reduced Graphene Oxide (ZnO-rGO) Composite Synthesized via One-Pot Room-Temperature Chemical Deposition Method
We synthesized zinc oxide-reduced graphene oxide (ZnO-rGO) composites using a one-pot chemical deposition method at room temperature. Zinc powder and graphene oxide (GO) of different mass ratios (1 : 1, 1 : 2, 1 : 5, 1 : 10, and 1 : 20 GO to Zn) were used as precursors in a mildly alkaline solution....
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Journal of Nanotechnology |
| Online Access: | http://dx.doi.org/10.1155/2019/1895043 |
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| author | Roselle T. Ngaloy Aixeen M. Fontanilla Ma. S. Rebecca Soriano Chelo S. Pascua Yoshitaka Matsushita Ian Jasper A. Agulo |
| author_facet | Roselle T. Ngaloy Aixeen M. Fontanilla Ma. S. Rebecca Soriano Chelo S. Pascua Yoshitaka Matsushita Ian Jasper A. Agulo |
| author_sort | Roselle T. Ngaloy |
| collection | DOAJ |
| description | We synthesized zinc oxide-reduced graphene oxide (ZnO-rGO) composites using a one-pot chemical deposition method at room temperature. Zinc powder and graphene oxide (GO) of different mass ratios (1 : 1, 1 : 2, 1 : 5, 1 : 10, and 1 : 20 GO to Zn) were used as precursors in a mildly alkaline solution. UV-Vis spectroscopy was used to study the photocatalytic efficiency of the samples through the photodegradation of methylene blue (MB). UV-Vis measurements show the fast decomposition of methylene blue under UV light illumination with the best degradation efficiency of 97.7% within one hour, achieved with sample ZG2 (1 GO : 2 Zn mass ratio). The corresponding degradation rate was kZG2 = 0.1253 min−1, which is at least 5.5 times better than other existing works using hydrothermal methods. We argue that the excellent photodegradation of MB by ZG2 is due to the efficient charge separation brought about by the electronic interaction of the rGO with the ZnO and the formation of a Zn-O-C bond, as supported by XRD and Raman spectroscopy measurements. |
| format | Article |
| id | doaj-art-eb71bb8ed1fa411691ba3cf29716fd1f |
| institution | OA Journals |
| issn | 1687-9503 1687-9511 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Journal of Nanotechnology |
| spelling | doaj-art-eb71bb8ed1fa411691ba3cf29716fd1f2025-08-20T02:22:21ZengWileyJournal of Nanotechnology1687-95031687-95112019-01-01201910.1155/2019/18950431895043Highly Efficient Photocatalysis by Zinc Oxide-Reduced Graphene Oxide (ZnO-rGO) Composite Synthesized via One-Pot Room-Temperature Chemical Deposition MethodRoselle T. Ngaloy0Aixeen M. Fontanilla1Ma. S. Rebecca Soriano2Chelo S. Pascua3Yoshitaka Matsushita4Ian Jasper A. Agulo5Micro and Nano Innovations Laboratory, Department of Physical Sciences, College of Science, University of the Philippines Baguio, Baguio 2600, PhilippinesMicro and Nano Innovations Laboratory, Department of Physical Sciences, College of Science, University of the Philippines Baguio, Baguio 2600, PhilippinesMicro and Nano Innovations Laboratory, Department of Physical Sciences, College of Science, University of the Philippines Baguio, Baguio 2600, PhilippinesMicro and Nano Innovations Laboratory, Department of Physical Sciences, College of Science, University of the Philippines Baguio, Baguio 2600, PhilippinesMaterials Analysis Station, National Institute for Materials Science, Sengen, Tsukuba, Ibaraki 305-0047, JapanMicro and Nano Innovations Laboratory, Department of Physical Sciences, College of Science, University of the Philippines Baguio, Baguio 2600, PhilippinesWe synthesized zinc oxide-reduced graphene oxide (ZnO-rGO) composites using a one-pot chemical deposition method at room temperature. Zinc powder and graphene oxide (GO) of different mass ratios (1 : 1, 1 : 2, 1 : 5, 1 : 10, and 1 : 20 GO to Zn) were used as precursors in a mildly alkaline solution. UV-Vis spectroscopy was used to study the photocatalytic efficiency of the samples through the photodegradation of methylene blue (MB). UV-Vis measurements show the fast decomposition of methylene blue under UV light illumination with the best degradation efficiency of 97.7% within one hour, achieved with sample ZG2 (1 GO : 2 Zn mass ratio). The corresponding degradation rate was kZG2 = 0.1253 min−1, which is at least 5.5 times better than other existing works using hydrothermal methods. We argue that the excellent photodegradation of MB by ZG2 is due to the efficient charge separation brought about by the electronic interaction of the rGO with the ZnO and the formation of a Zn-O-C bond, as supported by XRD and Raman spectroscopy measurements.http://dx.doi.org/10.1155/2019/1895043 |
| spellingShingle | Roselle T. Ngaloy Aixeen M. Fontanilla Ma. S. Rebecca Soriano Chelo S. Pascua Yoshitaka Matsushita Ian Jasper A. Agulo Highly Efficient Photocatalysis by Zinc Oxide-Reduced Graphene Oxide (ZnO-rGO) Composite Synthesized via One-Pot Room-Temperature Chemical Deposition Method Journal of Nanotechnology |
| title | Highly Efficient Photocatalysis by Zinc Oxide-Reduced Graphene Oxide (ZnO-rGO) Composite Synthesized via One-Pot Room-Temperature Chemical Deposition Method |
| title_full | Highly Efficient Photocatalysis by Zinc Oxide-Reduced Graphene Oxide (ZnO-rGO) Composite Synthesized via One-Pot Room-Temperature Chemical Deposition Method |
| title_fullStr | Highly Efficient Photocatalysis by Zinc Oxide-Reduced Graphene Oxide (ZnO-rGO) Composite Synthesized via One-Pot Room-Temperature Chemical Deposition Method |
| title_full_unstemmed | Highly Efficient Photocatalysis by Zinc Oxide-Reduced Graphene Oxide (ZnO-rGO) Composite Synthesized via One-Pot Room-Temperature Chemical Deposition Method |
| title_short | Highly Efficient Photocatalysis by Zinc Oxide-Reduced Graphene Oxide (ZnO-rGO) Composite Synthesized via One-Pot Room-Temperature Chemical Deposition Method |
| title_sort | highly efficient photocatalysis by zinc oxide reduced graphene oxide zno rgo composite synthesized via one pot room temperature chemical deposition method |
| url | http://dx.doi.org/10.1155/2019/1895043 |
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