Electron rich porous carbon/silica matrix from rice husk and its characterization |
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| Authors: | S. Swarnalatha A. Ganesh Kumar G. Sekaran |
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| Affiliation: | (1) Department of Environmental Technology, Central Leather Research Institute, Adyar, Chennai, 600 020, Tamil Nadu, India;(2) Department of Biomedical Engineering, Sathyabama University, Jeppiaar Nagar, Old Mamallapuram Road, Chennai, 600 119, Tamilnadu, India |
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| Abstract: | Free electron rich porous carbon/silica matrix (ECS800) was prepared from rice husk by carbonization at 400 °C and activation by phosphoric acid (H3PO4) at 800 °C. The ratio of H3PO4 to pre-carbonized carbon was fixed at 2.3. The surface area, pore volume, and pore size distribution of ECS800 was measured, using nitrogen adsorption isotherms at 77 K. The unpaired electron density of ECS800 was measured in electron spin resonance spectroscopy, using 4-hydroxy 2,2,6,6-tetramethyl piperidine-1-oxyl as the reference spin probe. ECS800 was further characterized, using X-ray diffraction, scanning electron microscope, Fourier transform infrared spectroscope, and 29Si-nuclear magnetic resonance spectroscope to study crystallization, surface morphology, functional group and different types of silicon species. |
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| Keywords: | Electron rich carbon/silica matrix Rice husk Spin density 29Si-NMR |
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