Graphene-Based Single Crystal TiO 2 Composites with Exposed Catalytic Interfaces for Efficient Photocatalytic Degradation.
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| Title: | Graphene-Based Single Crystal TiO 2 Composites with Exposed Catalytic Interfaces for Efficient Photocatalytic Degradation. |
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| Authors: | He, Yaping1,2,3 (AUTHOR) hejin04c@126.com, Sun, Zihui1,2 (AUTHOR), Zhang, Changhu1,2,3 (AUTHOR), Song, Limei1,3 (AUTHOR), Han, Quan1,2 (AUTHOR) |
| Source: | Materials (1996-1944). May2026, Vol. 19 Issue 10, p1963. 18p. |
| Subjects: | Titanium dioxide, Photodegradation, Nanostructured materials, Catalytic domains, Photocatalysis, Composite materials, Graphene, Hydrothermal synthesis |
| Abstract: | Three types of graphene–single crystal titanium dioxide composite (GR–TiO2SCs) were prepared using the hydrothermal method, employing TiF4 and graphite as raw materials with hydrofluoric acid serving as the morphology-directing agent. The phase composition and morphological features of the resultant composites were systematically characterized by X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, Raman spectroscopy, and scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy and X-ray diffraction. These complementary characterization results clearly demonstrate that graphene and TiO2 single crystals have been successfully hybridized to form a well-defined heterostructure, rather than a simple physical mixture. Photocatalytic performances were evaluated by monitoring the photodegradation behaviors of methylene blue, rhodamine B, and methyl orange solutions under simulated light irradiation, with real-time concentration variations recorded by UV–visible absorption spectroscopy. The composite sample in which TiO2SCs were in situ grown and uniformly anchored onto graphene oxide substrates effectively suppressed the self-stacking and agglomeration of individual crystallites, thus delivering the best photocatalytic response. Increased exposure of the active catalytic interfaces of TiO2SCs was found to play a key role in elevating the overall photocatalytic activity. The hierarchical assembly protocol developed in this work provides a feasible pathway for the rational design of functional composites with controllable microstructures and tailored properties, which can be further extended to the development of advanced sensing materials. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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| Abstract: | Three types of graphene–single crystal titanium dioxide composite (GR–TiO2SCs) were prepared using the hydrothermal method, employing TiF4 and graphite as raw materials with hydrofluoric acid serving as the morphology-directing agent. The phase composition and morphological features of the resultant composites were systematically characterized by X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy, Raman spectroscopy, and scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy and X-ray diffraction. These complementary characterization results clearly demonstrate that graphene and TiO2 single crystals have been successfully hybridized to form a well-defined heterostructure, rather than a simple physical mixture. Photocatalytic performances were evaluated by monitoring the photodegradation behaviors of methylene blue, rhodamine B, and methyl orange solutions under simulated light irradiation, with real-time concentration variations recorded by UV–visible absorption spectroscopy. The composite sample in which TiO2SCs were in situ grown and uniformly anchored onto graphene oxide substrates effectively suppressed the self-stacking and agglomeration of individual crystallites, thus delivering the best photocatalytic response. Increased exposure of the active catalytic interfaces of TiO2SCs was found to play a key role in elevating the overall photocatalytic activity. The hierarchical assembly protocol developed in this work provides a feasible pathway for the rational design of functional composites with controllable microstructures and tailored properties, which can be further extended to the development of advanced sensing materials. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 19961944 |
| DOI: | 10.3390/ma19101963 |
