Modulating the Photocatalytic Activity of Graphene Quantum Dots via Atomic Tailoring for Highly Enhanced Photocatalysis under Visible Light
- Title
- Modulating the Photocatalytic Activity of Graphene Quantum Dots via Atomic Tailoring for Highly Enhanced Photocatalysis under Visible Light
- Author
- 김종호
- Keywords
- NITROGEN-DOPED GRAPHENE; OXYGEN REDUCTION; CARBON DOTS; ELECTROCATALYTIC ACTIVITY; ONE-STEP; OXIDE; OXIDATION; AMINES; SIZE; PHOTOLUMINESCENCE
- Issue Date
- 2016-10
- Publisher
- WILEY-V C H VERLAG GMBH
- Citation
- ADVANCED FUNCTIONAL MATERIALS, v. 26, No. 45, Page. 8211-8219
- Abstract
- Precise control over doping of photocatalysts is required to modulate their photocatalytic activity in visible light-driven reactions. Here, a single precursor-employing bottom-up approach is developed to produce different heteroatom-doped graphene quantum dots (GQDs) with unique photocatalytic activities. The solvothermal reaction of a norepinephrine precursor with redox active and condensable moieties effectively produces both nitrogen/sulfur codoped GQDs (NS-GQDs) and nitrogen-doped GQDs (N-GQDs) by simply varying solvents (from dimethyl sulfoxide to water) under microwave irradiation. As-prepared NS-GQDs and N-GQDs show similar lateral sizes (3-4 nm) and heights (1-2 nm), but they include different dopant types and doping constitution and content, which lead to changes in photocatalytic activity in aerobic oxidative coupling reactions of various amines. NS-GQDs exhibit much higher photocatalytic activity in reactions under visible light than N-GQDs and oxygen-doped GQDs (O-GQDs). The mechanism responsible for the outstanding photocatalytic activity of NS-GQDs in visible lightdriven oxidative coupling reactions of amines is also fully investigated.
- URI
- https://onlinelibrary.wiley.com/doi/full/10.1002/adfm.201603803https://repository.hanyang.ac.kr/handle/20.500.11754/102867
- ISSN
- 1616-301X; 1616-3028
- DOI
- 10.1002/adfm.201603803
- Appears in Collections:
- COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > MATERIALS SCIENCE AND CHEMICAL ENGINEERING(재료화학공학과) > Articles
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