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Synthesis of TiO2-Ag composite through ultrasonic batch cleaning technique as a candidate for antifungal agent Phytophthora palmivora

A H Watoni1, N A Yanti2, S Marlini1, M Z Muzakkar1, M Maulidiyah1, I Irwan1, Z Arham2 and M Nurdin1
In this work, TiO2-Ag composites have been synthesized through the Ultrasonic Batch Cleaning technique and applied as an antifungal candidate against Phytophthora palmivora. P. palmivora is a pod rot fungus on cacao plants. Physically, the successful synthesis of TiO2-Ag has been characterized by a change in the color of the precipitate from white to grey. This success was confirmed by Scanning Electron Microscopy (SEM) analysis, where the presence of Ag+ ions made the TiO2 surface more regular. The Ag+ ion was evenly distributed on the TiO2 surface and covers the large TiO2 particles. The results of EDX analysis have shown that the % composition of TiO2-Ag was 93.22%, each consisting of Ti of 50.37%, O of 37.57%, and Ag of 5.25%. Based on the antifungal activity test, TiO2-Ag has good antifungal activity against P. palmivora. The minimum inhibitory level occurred at a concentration of 2.50%, while the minimum lethal rate occurred at a concentration of 4.88%.

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Diterbitkan pada: The 2-nd International Seminar on Science and Technology 2020 (ISST-2) 2020 Journal of Physics: Conference Series

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