CD Tesis

Sintesis Mangan Oksida Dengan Metode Pengendapan Dan Aplikasinya Untuk Degradasi Metilen Biru: Efek Laju Alir Dan Pencucian

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Manganese oxide cryptomelane-type Octahedral Molecular Sieve (OMS)
was synthesized by the reaction between KMnO4 and C6H8O7 (citric acid) with a
mole ratio of 5:1 using precipitation method. The effect of citric acid flow rates
(1, 2, and 3 mL/minutes) on the synthesis of MnO2 was studied and correlated
with its catalytic activities. The as-synthesized manganese oxides were then
characterized by XRD for their structures and particle sizes, EDX for the
elemental content on the MnO2 surface. The average oxidation states of Mn in
MnO2, and the ratio of K/Mn were also determined to investigate the active
oxidation state of Mn in the catalytic reaction. The XRD results exhibited that
calcinet manganese oxide samples showed much more crystalline phase than
those without calcination. The difference in the flow rate of citric acid had no
effect on crystal structure of manganese oxides, with only small difference in the
intensity of the peaks on the XRD diffactograms. The surface of cryptomelane
contained C, O, K and Mn with the average oxidation state of Mn in the range of
3.03-3.99. The catalytic activity of cryptomelane was evaluated for the
degradation of methylene blue (MB) with H2O2 as oxidant and the activity of
uncalcinet cryptomelane was higher than that of calcinet counterpart. The
optimum degradation of MB was 99.31% obtained from the catalyst synthesized
with the flow rate of 1 mL/minute with uncalcined catalyst, 100 mg of catalyst and
10 mL of H2O2.
Keywords: Cryptomelane, precipitation method and methylene blue.

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Ketersediaan

Informasi Detail

Judul Seri

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No. Panggil

10 05. 221 (0002)

Penerbit

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

Deskripsi Fisik

xiii, 73 hlm.: ill.: 29 cm

Bahasa

Indonesia

ISBN/ISSN

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Klasifikasi

10 05. 221 (0002)

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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