Photocatalytic hydrogen production by ternary heterojunction composites of silver nanoparticles doped FCNT-TiO2
| Autor: | U. Bharagav, Sang Woo Joo, Tejraj M. Aminabhavi, Muthukonda Venkatakrishnan Shankar, Kakarla Raghava Reddy, Nagaraj P. Shetti, N. Ramesh Reddy, P. Mohan Reddy, M. Mamatha Kumari, Fernando Alonso-Marroquin |
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| Rok vydání: | 2021 |
| Předmět: |
Environmental Engineering
Materials science Nanocomposite 0208 environmental biotechnology 02 engineering and technology General Medicine 010501 environmental sciences Management Monitoring Policy and Law 01 natural sciences Silver nanoparticle 020801 environmental engineering Catalysis symbols.namesake X-ray photoelectron spectroscopy Chemical engineering symbols Photocatalysis Fourier transform infrared spectroscopy Raman spectroscopy Waste Management and Disposal 0105 earth and related environmental sciences Hydrogen production |
| Zdroj: | Journal of Environmental Management. 286:112130 |
| ISSN: | 0301-4797 |
| Popis: | Silver nanoparticles doped with FCNT-TiO2 heterogeneous catalyst was prepared via one-step chemical reduction process and their efficacy was tested for hydrogen production under solar simulator. Crystallinity, purity, optical properties, and morphologies of the catalysts were examined by X-Ray diffraction, Raman spectroscopy, UV–Visible diffuse reflectance spectra, and Transmission Electron Microscopy. The chemical states and interface interactions were studied by X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy. The optimized catalyst showed 19.2 mmol g−1 h−1 of hydrogen production, which is 28.5 and 7 times higher than the pristine TiO2 nanoparticles and FCNT-TiO2 nanocomposite, respectively. The optimized catalyst showed stability up to 50 h under the solar simulator irradiation. The natural solar light irradiated catalyst showed ~2.2 times higher hydrogen production rate than the solar simulator irradiation. A plausible reaction mechanism of Ag NPs/FCNT-TiO2 photocatalyst was elucidated by investigating the beneficial co-catalytic role of Ag NPs and FCNTs for enhanced hydrogen production. |
| Databáze: | OpenAIRE |
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