TiO2/Diazonium/Graphene Oxide Composites: Synthesis and Visible-Light-Driven Photocatalytic Degradation of Methylene Blue
In the present article, the synthesis of TiO2/diazonium/graphene oxide and its photocatalytic activity for methylene blue (MB) degradation have been demonstrated. The functionalization of graphene oxide (GO) with diazonium salt (diazonium-GO) was conducted for enhancing the dispersibility of GO in d...
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doaj-ecfb0a5a083b40caa934cd4b656bfdef2020-11-25T02:47:37ZengHindawi LimitedJournal of Nanomaterials1687-41101687-41292020-01-01202010.1155/2020/43501254350125TiO2/Diazonium/Graphene Oxide Composites: Synthesis and Visible-Light-Driven Photocatalytic Degradation of Methylene BlueNguyen Thi Vuong Hoan0Nguyen Ngoc Minh1Thoi Thi Kim Nhi2Nguyen Van Thang3Vu Anh Tuan4Vo Thang Nguyen5Nguyen Mau Thanh6Nguyen Van Hung7Dinh Quang Khieu8Quy Nhon University, 590000, VietnamQuy Nhon University, 590000, VietnamQuy Nhon University, 590000, VietnamQuy Nhon University, 590000, VietnamInstitute of Chemistry, Vietnam Academy of Science and Technology, 100000, VietnamUniversity of Education and Science, The University of Da Nang, 550000, VietnamFalculty of Natural Sciences, Quang Binh University, 510000, VietnamCenter for Chemistry Analysis, Dong Thap University, 870000, VietnamUniversity of Sciences, Hue University, 530000, VietnamIn the present article, the synthesis of TiO2/diazonium/graphene oxide and its photocatalytic activity for methylene blue (MB) degradation have been demonstrated. The functionalization of graphene oxide (GO) with diazonium salt (diazonium-GO) was conducted for enhancing the dispersibility of GO in distilled water. TiO2 was highly dispersed in diazonium-GO to form TiO2/diazonium/graphene. The obtained specimens were characterized by X-ray diffraction, FT-IR spectroscopy, Raman spectroscopy, UV-Vis spectroscopy, scanning electron microscope, transmission electron microscopy, and X-ray photoelectron spectroscopy. It was found that the TiO2 phase in TiO2/diazonium/GO composites can be controlled by adjusting the amount of ethanol or titanium oxide in the reactant mixture. The obtained composites exhibited photocatalytic activities for methylene blue degradation (MB). The composite with ac. 70% anatase can provide the highest MB degradation efficiency. The studying of some intermediates for MB photocatalytic degradation using LC-MS showed that structure of MB by the cleavage and oxidation of one or more of the methyl group substituent on the amine groups lead to form compounds with low molecular masses. Total organic carbon studies confirmed a complete mineralization of MB. The present catalyst was stable and recyclable after three times with a negligible loss of catalytic activity. In addition, the TiO2/diazonium/GO can also photocatalyze for the degradation of some other dyes (phenol, methyl red, and Congo red).http://dx.doi.org/10.1155/2020/4350125 |
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DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Nguyen Thi Vuong Hoan Nguyen Ngoc Minh Thoi Thi Kim Nhi Nguyen Van Thang Vu Anh Tuan Vo Thang Nguyen Nguyen Mau Thanh Nguyen Van Hung Dinh Quang Khieu |
spellingShingle |
Nguyen Thi Vuong Hoan Nguyen Ngoc Minh Thoi Thi Kim Nhi Nguyen Van Thang Vu Anh Tuan Vo Thang Nguyen Nguyen Mau Thanh Nguyen Van Hung Dinh Quang Khieu TiO2/Diazonium/Graphene Oxide Composites: Synthesis and Visible-Light-Driven Photocatalytic Degradation of Methylene Blue Journal of Nanomaterials |
author_facet |
Nguyen Thi Vuong Hoan Nguyen Ngoc Minh Thoi Thi Kim Nhi Nguyen Van Thang Vu Anh Tuan Vo Thang Nguyen Nguyen Mau Thanh Nguyen Van Hung Dinh Quang Khieu |
author_sort |
Nguyen Thi Vuong Hoan |
title |
TiO2/Diazonium/Graphene Oxide Composites: Synthesis and Visible-Light-Driven Photocatalytic Degradation of Methylene Blue |
title_short |
TiO2/Diazonium/Graphene Oxide Composites: Synthesis and Visible-Light-Driven Photocatalytic Degradation of Methylene Blue |
title_full |
TiO2/Diazonium/Graphene Oxide Composites: Synthesis and Visible-Light-Driven Photocatalytic Degradation of Methylene Blue |
title_fullStr |
TiO2/Diazonium/Graphene Oxide Composites: Synthesis and Visible-Light-Driven Photocatalytic Degradation of Methylene Blue |
title_full_unstemmed |
TiO2/Diazonium/Graphene Oxide Composites: Synthesis and Visible-Light-Driven Photocatalytic Degradation of Methylene Blue |
title_sort |
tio2/diazonium/graphene oxide composites: synthesis and visible-light-driven photocatalytic degradation of methylene blue |
publisher |
Hindawi Limited |
series |
Journal of Nanomaterials |
issn |
1687-4110 1687-4129 |
publishDate |
2020-01-01 |
description |
In the present article, the synthesis of TiO2/diazonium/graphene oxide and its photocatalytic activity for methylene blue (MB) degradation have been demonstrated. The functionalization of graphene oxide (GO) with diazonium salt (diazonium-GO) was conducted for enhancing the dispersibility of GO in distilled water. TiO2 was highly dispersed in diazonium-GO to form TiO2/diazonium/graphene. The obtained specimens were characterized by X-ray diffraction, FT-IR spectroscopy, Raman spectroscopy, UV-Vis spectroscopy, scanning electron microscope, transmission electron microscopy, and X-ray photoelectron spectroscopy. It was found that the TiO2 phase in TiO2/diazonium/GO composites can be controlled by adjusting the amount of ethanol or titanium oxide in the reactant mixture. The obtained composites exhibited photocatalytic activities for methylene blue degradation (MB). The composite with ac. 70% anatase can provide the highest MB degradation efficiency. The studying of some intermediates for MB photocatalytic degradation using LC-MS showed that structure of MB by the cleavage and oxidation of one or more of the methyl group substituent on the amine groups lead to form compounds with low molecular masses. Total organic carbon studies confirmed a complete mineralization of MB. The present catalyst was stable and recyclable after three times with a negligible loss of catalytic activity. In addition, the TiO2/diazonium/GO can also photocatalyze for the degradation of some other dyes (phenol, methyl red, and Congo red). |
url |
http://dx.doi.org/10.1155/2020/4350125 |
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