CD Skripsi

Analisis Variasi Konsentrasi Pada Pencampuran Kmno4 Dan Glukosa Secara Simultan Dalam Sintesis Cryptomelane Sebagai Katalis Untuk Degradasi Metilen Biru

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The cryptomelane-type manganese oxide catalyst was synthesized using KMnO4 and glucose through a co-precipitation method with simultaneous mixing. The ratio of reactant concentrations of KMnO4 to glucose was 0.4M/0.6M; 0.2M/0.3M; 0.08M/0.12M; and 0.04M/0.06M. Characterization of the synthesized catalyst was conducted using X-Ray Diffraction (XRD), Fourier Transform Infrared (FTIR), and Raman spectroscopy. The average manganese oxidation state (AOS) and pH zero point charge (pHzpc) of the as synthesis were determination by the oxalic acid-permanganate back-titration method and salt titration of KCl . The XRD characterization results indicated that the concentration did not affect the phase structure but significantly influenced the intensity, average particle size, and crystallinity. The lowest concentration ratio resulted in a large average particle size (20.89 nm) and low crystallinity (5.63%), correlated with the presence of defects (oxygen vacancies) in the lattice, as evidenced by an low AOS of 3.79. The vibration between Mn-O was demonstrated by the absorption bands appearing in the FTIR characterization results in the wavenumber range of 431 cm-1 to 682 cm-1. The specific Mn-O vibrations of cryptomelane were also demonstrated by characterization results using Raman spectroscopy at Raman shifts 654,71 cm-1, 579,47 cm-1, and 184,01 cm-1. The synthesized catalyst exhibited pHzpc values at acidic and near-neutral pH. The pHzpc values for the catalyst with the lowest concentration ratio of KMnO4/glucose were 4.4 and 7.2. The catalytic activity of the synthesized catalyst was tested in the ability to degrade methylene blue using a Fenton-like method. The catalyst with the lowest concentration ratio demonstrated better activity compared to other synthesized catalysts. The optimization of the catalyst was performed by varying pH, 30% H2O2 volume, catalyst mass, and initial concentration of methylene blue. According to the research results, this catalyst was capable of degrading methylene blue by 97.01 ± 0.33% after a contact time of 120 minutes under the conditions of pH = 11, 30% H2O2 volume of 15 mL, catalyst mass of 50 mg, and initial concentration of methylene blue at 30 ppm.

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Ketersediaan

Informasi Detail

Judul Seri

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No. Panggil

1903113915

Penerbit

Pekanbaru : Universitas Riau – FMIPA - Kimia., 2024

Deskripsi Fisik

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Bahasa

Indonesia

ISBN/ISSN

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Klasifikasi

1903113915

Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

KIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

Mutia

Versi lain/terkait

Lampiran Berkas

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