Wipsar Sunu Brams Dwandaru, Emi Kurnia Sari, Wira Widyawidura, Deni Shidqi Khaerudini, Elisabeth Pratidhina, Mela Agustin, Linda Purnamasari, Wiwin Silfiyani, Tria Andriana Yongga
We report the synthesis of carbon nanodots (Cdots) from watermelon peel waste. The Cdots obtained were characterized using ultraviolet-visible, photoluminescence, Fouriertransform infrared spectroscopies, and transmission electron microscopy. The Cdots exhibited green luminescence. The average diameter of the Cdots was 4 nm and the C=C functional groups were dominant. The Cdots were then utilized as CO2absorbent in biogas. The result showed that the concentration of CO2was reduced by up to 40% based on the gas chromatography test. The higher the Cdots concentration, the higher is the amount of CO2that can be reduced in the biogas. Based on the heat performance test, higher concentration of Cdots produced higher heat energy of the biogas. © 2021 Ukrainian State University of Chemical Technology. All rights reserved.
Physics Education Department, Faculty of Mathematics and Natural Sciences, Universitas Negeri Yogyakarta, Indonesia; Mechanical Engineering, Faculty of Engineering, Universitas Proklamasi, Yogyakarta, Indonesia; Research Center for Physics, Indonesian Institute of Science, Banten, Indonesia
