Abstract
Carbon nanodots (C-Dots) of frying oil could be a photocatalyst for the degradation of methylene blue solution with assisted solar light irradiation. C-Dots of frying oil were resulted from the heating process at T = 300?C for 2 h. C-Dots of frying oil were used as a catalyst in methylene blue solution with variations the number of C-Dots and the time of solar light irradiation. The results of photocatalytic process show the degradation of concentration from methylene blue solution. It was observed from the color change of the solution and the absorbance intensity decreases with increasing time of photocatalytic process. FTIR spectra showed that the hydroxyl functional group -OH changes and more widened at wavenumber 3468 cm-1 because the result of photocatytic process of methylene blue solution is water (H2O) and carbon dioxide (CO2). Meanwhile, the intensity of the alkene functional group C = N at wavenumber 1650 cm-1 decreased during the photocatalytic process. These results indicate that C-Dots of frying oil have an excellent potential to be developed as a photocatalyst materials.
Highlights
Carbon nanodots (C-Dots) is the new material in a group of carbon nanomaterials which have the properties of fluorescence, low solubility in water and nontoxic
This is due to the layer of C-Dots on the top of methylene blue solution is thin so that photons from solar light can be effective as an energy source in the photocatalytic process
Besides the number of catalyst C-Dots, the photocatalytic process in methylene blue solution was influenced by the length of time the solar light irradiation
Summary
Carbon nanodots (C-Dots) is the new material in a group of carbon nanomaterials which have the properties of fluorescence, low solubility in water and nontoxic. C-Dots can be produced through the process of hydrothermal with various types of sources of carbon such as citric acid, soy milk, orange juice, ginger, food waste, waste paper etc (Rahmayanti et al, 2015; Zhu et al, 2012; Sahu et al, 2012; Li et al, 2014; Park et al, 2014; Wei et al, 2014). The process of hydrothermal cause carbon chains suffered the polymerization processes and forming particle C-Dots. C-Dots found in frying oils that have undergone the heating process. The bond of carbon chains that are abundant on the frying oil is broken as a result of the heating process and suffered the reorganization of carbon chains to form a particle C-Dots (Aji et al, 2015)
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