CD Skripsi

Sintesis Ag-Mno2 Dua Tahap Dan Aktivitas Katalitiknya Untuk Degradasi Metilen Biru

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Water pollution by synthetic dyes has been major environmental concern due to the
stability and toxic nature of most synthetic dyes. Thus, it is urgent to find an effective
method to solve this problem. Manganese oxides and modified counterpart with tunnel
and layered structure have been proposed as heterogeneous Fenton catalyst for the
degradation of dyes. In this study, the Ag-MnO2 has been successfully synthesized by
two-step processes, reflux method followed by wet impregnation for the impregnation
process. The different reflux time ( 1, 3, 6, 9 and 12 hours) was used and the products
were impregnated with the different AgNO3 concentrations (1; 5 and 10%). Doping using
transition metal ions can be done as an effort to reduce the bandgap and shift the light
absorption region. The addition of Ag+ metal aims to form a defect in MnO2. This study
aims to determine the effect of the addition of doping on MnO2 and determine the
characteristics of the resulting. The concentration of Ag+ seems to be the decisive factor
for the formation of either pure or mixture phase. The XRD results indicated that at 5 %
of Ag+ concentration and all reflux time under investigation tend to produce the pure
cryptomelane-type manganese oxide, whereas high Ag+ concentration generated the
mixture of cryptomelane and birnessite-type manganese oxide. The doped products were
tested as the Fenton catalyst for the degradation of methylene blue (MB) . The catalytic
studies was conducted using the catalysts obtained from the different reflux time and the
different Ag+ doped concentrations. Under optimum condition, the maximum
degradation of MB was 97% achieved using Ag-MnO2 doped with 5% Ag+ for 120
minutes of reflux time.

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Ketersediaan

Informasi Detail

Judul Seri

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No. Panggil

03 02. 121 (0044)

Penerbit

Pekanbaru : Universitas Riau – FMIPA – Kimia., 2021

Deskripsi Fisik

x, 47 hlm.: ill.: 29 cm

Bahasa

Indonesia

ISBN/ISSN

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Klasifikasi

03 02. 121 (0044)

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

ELFITRA

Versi lain/terkait

Lampiran Berkas

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