| Autor: |
Fachrudin, Adinandra Caesar, Kartini, Evvy, Fakhrudin, Muhammad, Drew, Alan J. |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 2023, Vol. 2932 Issue 1, p1-10, 10p |
| Abstrakt: |
Graphene is produced using green synthesis approaches from rice husk, called rice husk-derived graphene (GRHA). Due to the high silicon content compared to carbon in raw rice husks, this research will add sodium hydroxide (NaOH) treatment to reduce silica in the resulting GRHA, commonly known as desilication. Rice husk ash (RHA) was mixed with NaOH solution by stirring at 80 °C for 3 hours, followed by filtering, washing, and drying. Variation in NaOH concentration is 0.5, 1.0, and 1.5 M to study the optimal one added between the carbonization and activation at high temperature with potassium hydroxide (KOH). EDS spectra confirmed that the NaOH treatment could reduce silica, and the most optimal concentration was found at GRHA-1.0, as it possessed the highest carbon content of up to 80.27%. SEM images also showed a crumpled structure of layered graphene with a thickness of several nanometers. XRD patterns showed that the three samples still contain silica with a high degree of crystallinity. It is due to the thermal treatment, which is also responsible for converting silica from amorphous to crystalline. This methodology is a promising way to increase the added value of rice husks with a cost-effective process while reducing the wasted as an environmental burden. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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