New insights into surface functionalization and preparation methods of MWCNT based semiconductor photocatalysts
| Autor: | Soumya Gopi, Sankaran Sugunan, Honey Mary Joseph, Mothi Krishna Mohan, Lakshmiprasad Gurrala |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Diffuse reflectance infrared fourier transform Process Chemistry and Technology Picric acid 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry.chemical_compound X-ray photoelectron spectroscopy chemistry Chemical engineering 0103 physical sciences Materials Chemistry Ceramics and Composites Photocatalysis Rhodamine B Hydrothermal synthesis Surface modification Fourier transform infrared spectroscopy 0210 nano-technology |
| Zdroj: | Ceramics International. 45:14490-14499 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2019.04.058 |
| Popis: | The manuscript primarily describes the influence of various synthesis strategies on the photocatalytic properties of MWCNT/TiO2 binary nanohybrids. The multiwalled carbon nanotube modified titania hybrids synthesized via two-step reaction involving the covalent functionalization with green and mild oxidizing agent like H2O2, followed by simple surfactant/template free hydrothermal synthesis exhibited the maximum photocatalytic efficiency. The Total Organic Carbon (TOC) analysis showed complete mineralization of the persistent Rhodamine B dye in about 8 h. These synthesized nanohybrids in varying MWCNT content were tested for their photocatalytic efficiency in the degradation of explosive effluents like 4-nitrophenol and picric acid. The UV–Vis diffuse reflectance spectroscopy (UV–Vis DRS), X-ray photoelectron spectroscopy (XPS), Brunauer–Emmett–Teller Surface area analysis (BET), Fourier transform infrared spectroscopy (FT-IR), Transmission electron microscopy (TEM) and Raman spectra analysis evidently revealed the effective synergistic interaction between the MWCNT and titania at the interface that has contributed to the significant enhancement of photocatalytic performance. |
| Databáze: | OpenAIRE |
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