Analisis Pengaruh Silika Terhadap Aktivitas Fotokatalitik Nanopartikel Zinc Oxide

Maula, Iva (2015) Analisis Pengaruh Silika Terhadap Aktivitas Fotokatalitik Nanopartikel Zinc Oxide. Masters thesis, Institut Teknologi Sepuluh Nopember.

[img]
Preview
Text
2312201205-Master Thesis.pdf - Published Version

Download (3MB) | Preview

Abstract

ZnO telah menunjukkan sebagai fotokatalis yang menjanjikan dalam degradasi senyawa polutan organik dibandingkan dengan Titanium oksida (TiO2) . Silika ( SiO2 ) adalah bahan organik yang menjanjikan untuk digunakan sebagai komposit bahan ZnO nanopartikel karena secara kimiawi stabil kecuali dalam asam kuat atau basa . Selain itu, silika memiliki indeks bias rendah , yang dapat berkontribusi terhadap eksitasi efektif oleh sinar ultraviolet . Metode sonikasi digunakan untuk mensintesis ZnO nanoflower dengan menggunakan zinc nitrat sebagai prekursor. ZnO nanopartikel dikarakterisasi dengan X-Ray Diffraction (XRD) , spektrometri UV-Visible , Scanning Electron Microscope ( SEM ) , Fourier - transform IR ( FTIR ) dan BET ( Brunauer - Emmett- Teller ) . Hasil analisa XRD menunjukkan pembentukan nanopartikel dengan struktur ZnO heksagonal. Aktivitas fotokatalitik ZnO dievaluasi dengan mengukur degradasi larutan Methylene Biru ( MB ) dibawah sinar matahari . Absorbansi metilen biru yang dianalisis dengan menggunakan spektrofotometer UV-Vis pada panjang gelombang 664 nm . Hasil analisis menunjukkan penambahan silika dibawah 0.1 M tidak mempengaruhi aktivitas fotokatalitik ZnO. =============================================================================================== ZnO has shown a great promise as a photocatalyst being employed in degradation of organic pollutant compounds compared to Titanium oxide (TiO2). Silica (SiO2) is a promising in organic material for use as material composite for ZnO nanoparticle since it is chemically stable except in a strong acid or base. In addition, silica has a low refractive index, which can contribute to effective excitation by ultraviolet light. A sonication method was employed to synthesize flower-like ZnO by using zinc nitrate as a starting material. The ZnO nanoparticle were characterized by X-ray diffraction, UV-Visible spectrometry, Scanning Electron Microscope (SEM), Fourier-transform IR (FTIR) and BET (Brunauer-Emmett- Teller). The X-ray diffraction analysis of the sample showed the formation of nanopowder with wurtzite ZnO structure. The photocatalytic activities of ZnO were evaluated by measuring the degradation of Methylene Blue (MB) in water under the solar radiation. The absorbance of methylene blue were analyzed using Uv-vis Spectrophotometer at a wavelength of 664 nm. These result indicate that the addition of silica under 0.1 M did not affect the photocatalytic activity ZnO.

Item Type: Thesis (Masters)
Additional Information: RTK 660.299 5 Mau a
Uncontrolled Keywords: Komposit, Sonikasi, Methylene Blue, Degradasi
Subjects: T Technology > TP Chemical technology
T Technology > TR Photography
Divisions: Faculty of Industrial Technology > Chemical Engineering > (S2) Master Theses
Depositing User: Mr. Tondo Indra Nyata
Date Deposited: 22 Jun 2017 06:12
Last Modified: 22 Jun 2017 06:12
URI: http://repository.its.ac.id/id/eprint/41825

Actions (login required)

View Item View Item