Synthesis of Cu2O, Cu2O/Charcoal, and Cu2O/Activated Charcoal Composites as Antibacterial Agents
Abstract
Bacterial infection is main causes of chronic infection and death, so the prevention or reatment is needed. Antibiotis can use to bacterial infection treatment. However, excessive use of antibiotics causes the emergence of multiresistant bacteria, so it is necessary to look for antibacterial materials as an alternative treatment. Metal oxides are materials that have antibacterial properties. Copper oxide (Cu2O) has antibacterial properties on Gram-positive and Gram-negative bacteria. Copper oxide can be combined with charcoal and activated charcoal which requires antibacterial properties in the water treatment process. The combination of charcoal and activated charcoal with copper oxide will produce a composite with antibacterial properties. This study aims to synthesize Cu2O, Cu2O/charcoal and Cu2O/activated charcoal composites, identify the effect of different types of sugar as reducing agents on Cu2O produced, and identify the antibacterial activity of Cu2O and its composites. Synthesis of Cu2O using the Tollens like reaction method using Cu(NO3)2 as precursor, then adding NaOH, NH4OH, and sugar. The sugars used are sucrose, white sugar, and brown sugar. The type of sugar as a reducing agent affects the size and morphology of the Cu2O produced. The addition of Cu2O to charcoal and activated charcoal will add antibacterial properties to charcoal and activated charcoal. Copper oxide, Cu2O/charcoal and Cu2O /activated charcoal have high antibacterial properties in E. coli (Gram negative) because they have a thinner cell wall layer than S. aureus (Gram positive). The best antibacterial activity is Cu2O with white sugar as reducing agent.
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