Browsing by Author "Marshanda, Tessa"

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    BIOSINTESIS NANOKOMPOSIT Ag-ZnO
    (Elfitra, 2023-01) Marshanda, Tessa; Rini, Ari Sulistyo
    The addition of Ag meal to ZnO nanoparticles can improve the optical properties of the sample which results in a sample function that can be utilized and applied in various fields. In addition, the method used in the manufacture of nanoparticles also needs to be considered to define the environment. The use of ZnO (zink oxide) semiconductor material is an option in the manufacture of nanoparticles that have properties that are not easily damaged, are able to absorb UV rays better, are resistant to high temperatures, and are safer than other metals. The addition and insertion of silver metal was proven to increase the function and reactivity of ZnO samples. The method of making nanoparticles is divided into two, namely chemical and biological. Manufacture of nanoparticles using natural materials is proven to be safer and environmentally friendly compared to synthesis using chemicals that are harmful to the environment and tend to be quite expensive. In this study, pineapple peel was chosen as a reducing agent in the manufacture of nanoparticles. Pineapple rind has been reported to contain savonins and flavonoids which function to assist in the synthesis process. In addition, the use of pineapple peel is also a solution in reducing organic waste. In the process of making nanoparticles, pineapple peel extract is dried and mashed before being mixed with ZnO semiconductor material. Meanwhile, in the process of making, Ag-ZnO nanocomposite, the synthesis of ZnO nanoparticles is carried out first and then after mixing the ZnO solution which has been mixed with pineapple peel extract and AgNO3 powder until homogeneous then centrifuged and dried. Analysis of the optical properties of the sample was carried out by using a spectrophotometer UV-Vis characterization which showed the morphology on the surface of the sample. The results of this characterization show that the peak absorption of UV light in the sample is at a wavelength of 362 nm and the processed data from the test can be seen that the sample band gap is 2,98 eV and the morphological structure of the flower-shaped sample with an average size of 126,69 nm.