Graphene facilitated visible light photodegradation of methylene blue over titanium dioxide photocatalysts
Several graphene–titania composites (G–TiO2) were synthesized by a sol–gel method using titanium isopropoxide (or P25) as Ti-precursors and reduced graphene oxide (RGO). The structural, morphological, and physicochemical properties of the samples were thoroughly investigated by X-ray diffraction (XR...
| Main Authors: | , , , |
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| Format: | Journal Article |
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Elsevier BV
2013
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| Online Access: | http://hdl.handle.net/20.500.11937/45709 |
| _version_ | 1848757360702521344 |
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| author | Liu, Shi Zhen Sun, Hongqi Liu, Shaomin Wang, Shaobin |
| author_facet | Liu, Shi Zhen Sun, Hongqi Liu, Shaomin Wang, Shaobin |
| author_sort | Liu, Shi Zhen |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Several graphene–titania composites (G–TiO2) were synthesized by a sol–gel method using titanium isopropoxide (or P25) as Ti-precursors and reduced graphene oxide (RGO). The structural, morphological, and physicochemical properties of the samples were thoroughly investigated by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), field emission scanning electron microscopy (FE-SEM), UV–vis diffuse reflectance (UV–vis DRS), and thermogravimetric-differential thermal analysis (TG-DTA). A significant increase in light absorption to visible light was observed by G–TiO2 compared with that of naked TiO2. The photocatalytic activity of G–TiO2 in methylene blue bleaching under visible light (>430 nm) is much enhanced. G–TiO2 synthesized from titanium isopropoxide hydrolysis presented higher activity than that of G–TiO2(P25). Contribution of graphene on the enhancement of visible-light photocatalytic activity of the composite was discussed. |
| first_indexed | 2025-11-14T09:26:52Z |
| format | Journal Article |
| id | curtin-20.500.11937-45709 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T09:26:52Z |
| publishDate | 2013 |
| publisher | Elsevier BV |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-457092017-02-28T01:41:50Z Graphene facilitated visible light photodegradation of methylene blue over titanium dioxide photocatalysts Liu, Shi Zhen Sun, Hongqi Liu, Shaomin Wang, Shaobin TiO2 Graphene Photocatalysis Methylene blue Visible light Several graphene–titania composites (G–TiO2) were synthesized by a sol–gel method using titanium isopropoxide (or P25) as Ti-precursors and reduced graphene oxide (RGO). The structural, morphological, and physicochemical properties of the samples were thoroughly investigated by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), field emission scanning electron microscopy (FE-SEM), UV–vis diffuse reflectance (UV–vis DRS), and thermogravimetric-differential thermal analysis (TG-DTA). A significant increase in light absorption to visible light was observed by G–TiO2 compared with that of naked TiO2. The photocatalytic activity of G–TiO2 in methylene blue bleaching under visible light (>430 nm) is much enhanced. G–TiO2 synthesized from titanium isopropoxide hydrolysis presented higher activity than that of G–TiO2(P25). Contribution of graphene on the enhancement of visible-light photocatalytic activity of the composite was discussed. 2013 Journal Article http://hdl.handle.net/20.500.11937/45709 Elsevier BV restricted |
| spellingShingle | TiO2 Graphene Photocatalysis Methylene blue Visible light Liu, Shi Zhen Sun, Hongqi Liu, Shaomin Wang, Shaobin Graphene facilitated visible light photodegradation of methylene blue over titanium dioxide photocatalysts |
| title | Graphene facilitated visible light photodegradation of methylene blue over titanium dioxide photocatalysts |
| title_full | Graphene facilitated visible light photodegradation of methylene blue over titanium dioxide photocatalysts |
| title_fullStr | Graphene facilitated visible light photodegradation of methylene blue over titanium dioxide photocatalysts |
| title_full_unstemmed | Graphene facilitated visible light photodegradation of methylene blue over titanium dioxide photocatalysts |
| title_short | Graphene facilitated visible light photodegradation of methylene blue over titanium dioxide photocatalysts |
| title_sort | graphene facilitated visible light photodegradation of methylene blue over titanium dioxide photocatalysts |
| topic | TiO2 Graphene Photocatalysis Methylene blue Visible light |
| url | http://hdl.handle.net/20.500.11937/45709 |