GREEN DEKORASI Au/ZnO NANOKOMPOSIT MELALUI MEDIA EKSTRAK DAUN GAHARU (Aquilaria malaccenensis L.) DAN PENENTUAN NILAI SUN PROTECTION FACTOR

Aditya Ayuwulanda, Anjar Hermadi Saputro, Yogi Nopiandi Permana, Iwan Syahjoko Saputra

Abstract


Tujuan penelitian ini adalah mensintesis nanokomposit Au/ZnO melalui media green synthesis dengan memanfaatkan ekstrak daun gaharu (Aquilaria malaccenensis L). Ekstrak daun gaharu berfungsi sebagai bioreduktor alami dan capping agent dalam pembentukan nanokomposit Au/ZnO. Kehadiran koloid Au pada permukaan ZnO dapat merubah nilai celah pita, struktur kristal, ukuran partikel, dan nilai sun protection factor (SPF) ZnO. Au/ZnO nanokomposit memiliki nilai celah pita sebesar 3,0 eV dan hasil karakterisasi X-ray diffraction (XRD) menunjukkan puncak kristalinitas pada 2: 33,6o; 35,1o; 36,3o; 46,6o; 54,7o; 59,7o; 64,3o; dan 66,2o dengan rata-rata ukuran kristalit sebesar 37 nm. Gugus fungsi yang terkandung dalam ekstrak daun gaharu adalah O-H (3300 cm-1) berfungsi sebagai bioreduktor ion Au3+ menjadi Au0, C=C (1620 cm-1), dan C-N (1350 cm-1) berfungsi sebagai sumber basa dalam pembentukan Zn(OH)2 menjadi ZnO. Vibrasi Au-Zn-O terlihat pada bilangan gelombang 498 cm-1. Nilai SPF pada Au/ZnO nanokomposit sebesar 18,28. Dari data karakterisasi menunjukkan bahwa media ekstrak daun gaharu dapat digunakan sebagai bioreduktor alami, sumber basa, dan capping agent dalam dekorasi Au pada permukaan ZnO (Au/ZnO) nanokomposit.


Keywords


Nanokomposit, Au/ZnO, SPF, Green Dekorasi

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DOI: http://dx.doi.org/10.24817/jkk.v43i2.7137

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