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Controllable synthesis of peapod-like TiO2@GO@C electrospun nanofiber membranes with enhanced mechanical properties and photocatalytic degradation abilities towards methylene blue.
- Source :
- New Journal of Chemistry; 3/7/2020, Vol. 44 Issue 9, p3755-3763, 9p
- Publication Year :
- 2020
-
Abstract
- We prepared peapod-like titanium dioxide@graphene@carbon (TiO<subscript>2</subscript>@GO@C) nanofiber membranes through electrospinning. Due to the porous structure, large surface area, abundant surface functional groups and excellent thermal conductivity, GO can capsulize TiO<subscript>2</subscript> nanoparticles to form a pea-like TiO<subscript>2</subscript>@GO structure. Subsequently, TiO<subscript>2</subscript>@GO can be wrapped by the carbon nanofiber during an electrospinning process, forming peapod-like TiO<subscript>2</subscript>@GO@C nanofiber membranes. The existence of a peapod-like structure is beneficial for enhancing the crystallinity of TiO<subscript>2</subscript>, and preventing the phase transformation of TiO<subscript>2</subscript> from anatase to rutile phase at the same time. Furthermore, on the basis of the excellent carrier transport property of GO, the peapod-like TiO<subscript>2</subscript>@GO@C structure could also improve the light absorption, reduce recombination of hole–electron pairs, and improve the carrier transport and finally photocatalytic degradation property of methylene blue. Besides, the pea-like TiO<subscript>2</subscript>@GO structure shows a dispersion strengthening effect in the carbon nanofibers, preventing the carbon nanofibers from fracture. In particular, by optimizing the heat treatment temperature and additional amount of GO, the peapod-like TiO<subscript>2</subscript>@GO@C nanofiber membranes with 0.3 wt% GO show an excellent photocatalytic degradation efficiency of 98.5% in 3 h, and a high strength of 356.07 cN per dtex. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 11440546
- Volume :
- 44
- Issue :
- 9
- Database :
- Complementary Index
- Journal :
- New Journal of Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 142022323
- Full Text :
- https://doi.org/10.1039/c9nj06249a