| Autor: |
Nazar, Muhammad, Nada, Cut Elvira, Syahrial, Rusman, Khaldun, Ibnu, Hasan, M., Wirjosentono, Basuki, Basri |
| Zdroj: |
AIP Conference Proceedings; 2024, Vol. 3082 Issue 1, p1-8, 8p |
| Abstrakt: |
This study utilizes the microwave method to determine the optimum conditions for synthesizing carbon quantum dots (CQDs) trough activated carbon from coffee arabica grounds. Response Surface Methodology (RSM) with a Box-Behnken Design was used for optimization (BBD). In this study, a 200-mesh activated carbon obtained from coffee grounds was used as a raw material for synthesizing CQDs using the microwave method. The independent variables that are estimated to influence the measured parameters are the mass of activated carbon (X1: 0.5-1.5 g), synthesis time (X2: 3-7 minutes) and microwave power (X3: 60-100 %). The parameters measured were the conductivity (µS) of the CQDs (Y). The results showed that the mass of activated carbon significantly affected the conductivity of the CQDs solution (P<0.05). Meanwhile, the synthesis time and microwave power factors did not significantly influence the conductivity value (p>0.05). The lack of fit value was found to be 0.82 (p>0.05), proving that the mismatch and non-significance are rejected so that the second-order equation in the conductivity model (µS) has the feasibility of predicting the response to the treatment variables from mass, time, and microwave power. Summarily, RSM can be used to determine the optimal process for synthesizing carbon quantum dots, the optimal conditions obtained were a mass of 1.5 g, a synthesis time of 5 minutes, and an 82% microwave power. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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