Probing the chemical interaction between different carbon allotropes oxides and titanium dioxide nanoparticles by Raman spectroscopy
| Autor: | Natalia A. Soares, Jonnatan J. Santos, Fabiana Inoue, Karina C. Silva, Paola Corio |
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| Rok vydání: | 2019 |
| Předmět: |
Thermogravimetric analysis
Materials science Scanning electron microscope Resonance Raman spectroscopy General Physics and Astronomy chemistry.chemical_element NANOPARTÍCULAS 02 engineering and technology 010402 general chemistry 01 natural sciences law.invention Metal symbols.namesake law Physical and Theoretical Chemistry Nanocomposite Graphene 021001 nanoscience & nanotechnology 0104 chemical sciences Chemical engineering chemistry visual_art visual_art.visual_art_medium symbols 0210 nano-technology Raman spectroscopy Carbon |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| ISSN: | 0009-2614 |
| DOI: | 10.1016/j.cplett.2019.03.012 |
| Popis: | Nanocomposites of TiO2 and carbon allotropes oxides (single and multi-walled nanotubes and graphene) have been prepared and characterized via scanning electron microscopy, thermogravimetric analysis and resonance Raman spectroscopy. The chemical interaction between TiO2 and the different forms of carbon was investigated and different levels of interaction was observed. More specifically, a selective electronic interaction process between TiO2 and semiconducting SWNTs is revealed. The displacement of the tangential G-band mode to a lower frequency in titania-SWNTs composite, which specifically occurs for semiconducting tubes (and not for metallic ones) indicated the addition of electrons to the SWNT π band. |
| Databáze: | OpenAIRE |
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