Highly Efficient UV–Visible Photocatalyst from Monolithic 3D Titania/Graphene Quantum Dot Heterostructure Linked by Aminosilane
- Title
- Highly Efficient UV–Visible Photocatalyst from Monolithic 3D Titania/Graphene Quantum Dot Heterostructure Linked by Aminosilane
- Author
- 정문석
- Keywords
- 3D nanostructured TiO2; charge injection; graphene quantum dots; TiO2; GQD heterostructure; visible light photocatalysis
- Issue Date
- 2019-09
- Publisher
- WILEY-V C H VERLAG GMBH
- Citation
- ADVANCED SUSTAINABLE SYSTEMS, v. 3, no. 11, article no. 1900084
- Abstract
- As rapidly growing environmental pollution demands the development of efficient photocatalytic materials, tremendous attention has been drawn to TiO2, a widely used photocatalytic material with cost-effectiveness, stability, and outstanding reactivity. To maximize its photocatalytic efficiency by enhancing the photogenerated charge separation, lowering the intrinsically large bandgap (3.2 eV) of TiO2 is a key problem to be overcome. Herein, a new design is reported for an efficient photocatalyst realized by heterostructuring a 3D nanostructured TiO2 monolith (3D TiO2) and graphene quantum dots (GQDs) through using 3-aminopropyltriethoxysilane (APTES) as a linker. The incorporation of APTES between the TiO2/GQD interface enables the formation of a charge injection-type heterostructure, as confirmed by transient absorption spectroscopy, providing improvement of both visible absorption and charge separation. As a result, the heterostructure exhibits a 242% enhanced photocatalytic performance compared to that of nonheterostructured 3D TiO2 under visible irradiation, demonstrating its promising potential for practical photocatalytic applications in environmental remediation.
- URI
- https://onlinelibrary.wiley.com/doi/full/10.1002/adsu.201900084https://repository.hanyang.ac.kr/handle/20.500.11754/160773
- ISSN
- 2366-7486
- DOI
- 10.1002/adsu.201900084
- Appears in Collections:
- COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
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