CD Skripsi

Biosintesis Fotokatalis Seng Oksida Menggunakan Ekstrak Daun Matoa Dengan Variasi Iradiasi Microwave

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Pollutant degradation through advanced oxidation processes requires semiconductor materials that can be provided by environmentally friendly processes. The manufacture of semiconductor materials through a biosynthetic process assisted by microwave irradiation can minimize the use of hazardous chemicals with an energy-efficient process. This study aims to synthesize ZnO semiconductors and analyze the effect of microwave irradiation on the physical properties and photocatalytic activity of ZnO in the 4-nitrophenol pollutant degradation process. The ZnO semiconductor was prepared using a biosynthetic method by reacting Zinc Nitrate Hexahydrate (Zn(NO3)2∙6H2O) and matoa leaf extract (Pometia Pinnata) as bio stabilizers, assisted by microwave irradiation. The irradiation power is varied from 360 Watt, 540 Watt and 720 Watt. The optical properties, crystal structure and surface morphology of ZnO samples were characterized using UV-Vis spectroscopy, Field Emission Scanning Electron Microscopy (FESEM) and X-Ray Diffraction (XRD). The UV-Vis absorption spectrum shows the optimum peak of the ZnO sample in the wave range of 300-360 nm. The band gap energy value decreases with high irradiation power, namely, 3.15 eV-3.10 eV. The FESEM photo shows ZnO particles in spherical form and nanoplatelets and changes in particle size with a size range of 773.08-709.20 nm. The decrease in particle size is affected by the microwave irradiation power. XRD analysis confirmed that the ZnO sample structure was hexagonal wurtzite, the addition of irradiation power resulted in a more crystalline structure where the crystal size obtained was 19-20 nm. The results of the degradation of 4-nitrophenol with a span of 140 minutes. The highest reaction rate constant was owned by the irradiated sample at a power of 540 Watt (Znpp-540) with a value of -0.01255/min. The percentage of degradation in the photocatalyst process using ZnO samples showed optimum results in the range of 79-82%. The results of this study indicate that the Znpp-540 sample exhibits the optimum photocatalytic activity
Keywords : 4-nitrophenol, biosynthesis, matoa leaf extract, photocataly, Microwave, ZnO

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Ketersediaan

Informasi Detail

Judul Seri

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No. Panggil

1803112402

Penerbit

Pekanbaru : Universitas Riau – FMIPA – FISIKA., 2022

Deskripsi Fisik

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Bahasa

Indonesia

ISBN/ISSN

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Klasifikasi

1803112402

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

nadya

Versi lain/terkait

Lampiran Berkas

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