The Utilization of Anthocyanin Extract from Parijoto (Medinilla speciosa) as a Sensitizer in Dye-Sensitized Solar Cells (DSSC)

Nila Tanyela Berghuis — 2024-12-01

The research on the Utilization of Anthocyanin Extract from Parijoto (Medinilla speciosa) as a Sensitizers in Dye Sensitized Solar Cell (DSSC) aims to identify the presence of anthocyanin compounds in parijoto fruit and determine how much power can be generated from anthocyanin compounds as sensitizers in DSSC using variations of ethanol, methanol, ethanol-citric acid (50:50), methanol-citric acid (50:50) solvents through the maceration method for 48 hours. The highest yield was the methanol-citric acid extract from the fruit, which was 16.35%. Positive results in the identification of anthocyanin compounds that were dripped with NaOH showed a color change from red to green-blue and when dripped with HCl there was no color change. The results of the functional group characterization of the fruit ethanol extract through FTIR (Fourier Transform Infrared) analysis showed the presence of -OH groups, -C=C aromatic and -CO alcohol at a wave number of 3293 cm^-1, 1644 cm^-1, and 1019 cm^-1, while from the GCMS (Gas Chromatography Mass Spectrometry) analysis in the fruit ethanol extract there was a cyanidin structural framework at a retention time of 12.24 minutes with a value (m/z) of 243, and an area% of 1.09%. The power measurement on the fruit ethanol extract was 0.1516 mW and on the fruit ethanol-citric acid extract was 0.023 mW. The power generated indicates that the parijoto fruit extract has the potential as a sensitizer in the Dye-Sensitized Solar Cell (DSSC) application.

Synthesis of Composite ZnO-Zeolite and Its Application as Adsorbent: A Systematic Review

Jessica Veronica — 2024-12-07

This article aims to determine the most effective ZnO-zeolite synthesis method for use as an adsorbent. The effectiveness of the ZnO-zeolite synthesis method includes the methods of synthesis, characterization, and adsorption. This study is a literature search using Google Scholar and Science Direct with the keywords “ZnO”, “zeolite”, “synthesis”, and “adsorption” taken from the last 10 years (2013-2023). Twenty-six articles were obtained, and selection was carried out so that 12 articles were obtained. There were 4 methods for ZnO-zeolite synthesis: (1) sol-gel, (2) impregnation, (3) coprecipitation, and (4) hydrothermal methods. The synthesis of ZnO-zeolite products was characterized using X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, and scanning electron microscopy (SEM), and their adsorption capacity was tested via UV-Vis spectroscopy. The hydrothermal synthesis method is the most effective method for the synthesis of ZnO-zeolite because it does not consume a large amount of energy, is a simple synthesis procedure, and has a large adsorption power. The resulting ZnO-zeolite has a crystal size of 1.540 mm and can adsorb up to 657.895 mg/g of the adsorbate).

Jurnal Kartika Kimia

The Utilization of Anthocyanin Extract from Parijoto (Medinilla speciosa) as a Sensitizer in Dye-Sensitized Solar Cells (DSSC)

Synthesis of Composite ZnO-Zeolite and Its Application as Adsorbent: A Systematic Review