The Effect of Magnetic Stirring Duration and Ascorbic Acid Concentration on the Yield of Reduced Graphene Oxide Isolated from East Kalimantan Bituminous Coal
Journal Title: International Journal of Current Science Research and Review - Year 2023, Vol 6, Issue 12
Abstract
East Kalimantan bituminous coal has a carbon composition of 70.24%, indicating a crystal structure of graphite layers. This makes it a viable material for creating reduced graphene oxide (r-GO), which has multiple advantages in various properties and can be employed in numerous technological applications. RGO is obtained by nearly eliminating oxygen functional groups in graphene oxide (GO) through sonication for 3 hours at pH 4. The yield with the lowest value at a 30% concentration of ascorbic acid and 50 minutes of magnetic stirring was selected as optimal. To characterize the resulting product, FTIR was utilized and revealed that O-H (84.21%), C=C (63.04%), and C-O-C (61%) had the highest %T. Technical abbreviations were explained upon first use. Energy-dispersive X-ray (EDX) analysis demonstrated a 90.6% increase in carbon content from 40.159% in GO to 76.554% in r-GO. In parallel, oxygen content decreased from 40,973% in GO to 17.551% in rGO, marking a 57.16% decrease. The morphology of the resulting rGO closely resembled the reference. Additionally, rGO exhibited a C:O ratio of 4.378, surpassing the C:O ratio of GO, which was 1.02. RGO density and pH value were 1.45 g/cm3 and 2, respectively.
Authors and Affiliations
Tari Gintani Mulya Riani, Siti Mutrofin,
Keywords
Related Articles
- EP ID EP725648
- DOI 10.47191/ijcsrr/V6-i12-71
- Views 46
- Downloads 1
Digital Narratives and Social Dynamics: Examining the Influence of Technology in Aravind Adiga's The White Tiger
Aravind Adiga’s The White Tiger provides a critical analysis of the impact of digital technology and media on social dynamics within modern India. Published in 2008, the novel delves into the socio-economic changes occur...
Stock Valuation of PT. Bank ABC Tbk.
PT Bank ABC Tbk aspires to be one of the top 10 global sharia banks in 2025 in terms of market capitalization. As of December 2023, PT. Bank ABC Tbk ranks 13 with 5,18 billion USD in market capitalization. This research...
Eco-Innovation and Non-Eco-Innovation in Shaping Financial Performance: The Moderating Role of Online Consumer Reviews from Indonesian Cosmetic Industry
This study examines the relationship between eco-innovation, non-eco-innovation, online consumer reviews, and financial performance within the Indonesian context. Data from Indonesian companies were analyzed using quanti...
The Influence of Lipase Enzyme Level and Ca(OH)2 Usage in the Production of Protected Lemuru Fish Oil Supplement on the Texture, Nutrient Content, and Fatty Acid Value of the Product
The scarcity of feed energy source to ruminant can be anticipated by adding oil to the feed. However, the effect of adding oil to the feed more than 7% will reduce the activity of fiber-degrading microbes because fat is...
Design and Application of Augmented Reality in Science Education to Develop Students' Critical Thinking Skills
The goal of this project is to create instructional materials based on augmented reality (AR) that will enhance students’ critical thinking abilities. There were 25 pupils enrolled in the public junior high school where...