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Sintesis Perovskite CaMnO3 Dari CaCO3 Dan MnO2 (Tipe Cryptomelane) Dan Uji Aktivitas Fotokatalitik Untuk Degradasi Metilen Biru

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Perovskite CaMnO3 is a semiconductor material used as a
supercapacitor, solar cell and catalyst. Different synthesis methods for perovskite
synthesis will affect the physical and chemical properties of perovskite and
catalytic activity. This study aims to synthesize CaMnO3 perovskite using the sol
gel method with a CaCO3: MnO2 mole ratio (1:1 and 3:4) at various
temperatures of 700°C; 800 oC; and 900°C , characterizing perovskite CaMnO3,
and studying its catalytic activity for methylene blue degradation. Perovskite
CaMnO3 was synthesized by the sol-gel method and applied as a photocatalyst to
degrade methylene blue (MB) dye. The results of XRD analysis on CaMnO3
perovskite showed an angle of 2θ 33.45o with a reflection plane of 121.
Characterization of the catalyst using the BET method obtained the surface area
of perovskite CaMnO3 1:1 800 oC = 8.601 m2/g and CaMnO3 1:1 900 oC =
5.819. The largest pore volume is found in CaMnO3 3:4 900 oC perovskite.
Catalytic tests on methylene blue color solutions were carried out with variations
in pH (acid (pH 2) ); without pH adjustment (pH 5.6);and (pH 11), mass of
catalyst (25.50, and 75 mg) and initial concentration of methylene blue (50, 75,
and 100 ppm.) The test results on several CaMnO3 perovskites showed that 1:1
800oC and 1:1 900oC CaMnO3 perovskites had the highest catalytic activity for
MB degradation, namely 100% in 30 minutes using an acidic (pH 2) the weight of
the catalyst was 75 mg and the concentration of methylene blue was 50 ppm and
had band gap values of 1.15 and 1.14 eV. Optimization of the performance of the
CaMnO3 catalyst was carried out by varying the mass of the catalyst and the
concentration of methylene blue. The greater the amount of catalyst and the
smaller the contrast of methylene solution blue, the better the degradation results.
Keywords : Degradation, Photocatalytic, Perovskite CaMnO3, Sol-gel.

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Ketersediaan

Informasi Detail

Judul Seri

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No. Panggil

1810246786

Penerbit

Pekanbaru : Universitas Riau – Pascasarjana – Tesis Kimia., 2022

Deskripsi Fisik

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Bahasa

Indonesia

ISBN/ISSN

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Klasifikasi

1810246786

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

FATAH

Versi lain/terkait

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