CD Tesis

Sintesis Dan Karakterisasi Micro-Flower Zno Menggunakan Ekstrak Kulit Ananas Comosus Sebagai Antibakteri

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The Preparation of ZnO nanoparticles with a method that is simple, inexpensive and utilizing plant extracts as surfactants and stabilizing agents such as hexamethyl tetramine (HMT) and polyvinyl pyrolidone (PVP) and to produce a unique morphology with biosynthetic method has attracted much attention of researchers. In this study, the biosynthesis of ZnO nanoparticles was carried out using the peel extract of Ananas comosus as a capping agent. Zinc nitrate is used as a precursor in the biosynthetic process of ZnO particles. Zinc nitrate is made in four variations of concentration, namely, 10 mM, 25 mM, 50 mM, and 100 mM. The purpose of varying the precursor concentrations was to observe the effect on the physical properties of the ZnO formed. The synthesis process was carried out by heating the sample at 60 for two hours to produce a white powder. The ZnO powder was then separated from the solvent and washed using DI-water. The morphology, crystal structure, functional groups, and optical properties of the ZnO samples were studied from the characterization results of Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD), Fourier-Infrared Transformation Spectroscopy (FTIR), and UV-Vis spectroscopy.
The morphology of SEM for ZnO samples varied depending on the initial concentration of zinc nitrate precursor used. Samples of 10mM, 25mM, 50mM, and 100mM were obtained in the form of flowers or micro-nanoflowers with an average diameter of 538 nm, 507 nm, 334 nm, and 331 nm. Based on the XRD results, the crystal phase formed is the ZnO hexagonal wurtzite phase with the highest diffraction peak in the hkl (101) plane which has a crystal size of 14-17 nm. The results of FTIR characterization showed that with the addition of zinc nitrate concentration, the Zn-O functional group bonds widened, while the functional group bonds derived from the Ananas comosus peel extract were getting narrower. The UV-Vis absorbance spectrum shows that the absorption peak is in the ultraviolet region with a wavelength range of 220 - 360 nm with a bandgap energy value of about 3.22 eV to 3.27 eV. The synthetic 10mM ZnO flower was selected for its antibacterial activity test using the gram-negative bacteria Escherichia coli and the gram-positive bacteria Staphylococcus aureus. The best results obtained for Escherichia coli and Staphylococcus aureus were ZnO samples at a concentration of 20% and 30% ZnO solution, respectively, with clear zone diameters of 17.23 + 3.03 mm and 30.14 + 1.86 mm. The results obtained indicated that the ZnO nanoparticles made using the biosynthetic method had a wide bacterial inhibition zone so that they could potentially be applied as anti bacterial agents.
Keyword : Nanoparticles, ZnO, Ananas Comosus, Anti bacterial

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Ketersediaan

Informasi Detail

Judul Seri

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No. Panggil

10 17. 221 (0001)

Penerbit

Pekanbaru : Universitas Riau – Pascasarjana – Tesis Fisika., 2021

Deskripsi Fisik

xiii, 66 hlm.: ill.: 29 cm

Bahasa

Indonesia

ISBN/ISSN

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Klasifikasi

10 17. 221 (0001)

Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

FISIKA

Info Detail Spesifik

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Pernyataan Tanggungjawab

FATAH

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