Precursor effects on the morphology and crystallinity of manganese oxides and their catalytic application for methylene blue degradation

Awaluddin, Amir; Agustina, Mutia; Aulia, Rizki Rilda; Muhdarina,

doi:10.1063/1.4978181

Cited by 6 publications

(2 citation statements)

References 28 publications

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“…Several researchers have performed various methods to synthesize MnO2. Different synthesis methods such as hydrothermal [1], micro-emulsion, precipitation [2], reflux [3], radiolytic methods (gamma-ray irradiation) [4], solid-state [5], and sol-gel [6]can obtain or produce different crystallographic forms of MnO2. In general, the MnO2 structure can be synthesized through Mn 2+ oxidation, MnO4‾ reduction, redox reactions between Mn 2+ and MnO4‾, or direct phase transformations from other manganese oxides [7].…”

Section: Introductionmentioning

confidence: 99%

“…The citric-prepared δ-MnO2 showed higher degradation of MB than that of oxalic-prepared δ-MnO2. Another reducing agent like simple sugars (glucose) has been applied by Awaluddin et al to synthesize manganese oxides of α-MnO2 by the sol-gel [6] and δ-MnO2 by the solvent-free method [5], respectively. These manganese oxides also display a high catalytic performance as a heterogeneous Fenton catalyst for MB degradation.…”

Section: Introductionmentioning

confidence: 99%

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Preliminary Study on COD Removal on the Treatment of Palm Oil Mill Effluent (POME) Using Birnessite-Type Manganese Oxide via a Solvent-Free Method

Awaluddin¹,

Sonia²,

Muhdarina³

et al. 2021

Advances in Social Science, Education and Humanities Research

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Palm oil mill effluent (POME) has an adverse effect on the environment due to its high toxicity, low pH, and high chemical and biological oxygen demand. The degradation using Fenton processes is considered as an attractive and sustainable way for the treatment of POME. In this study, as-synthesized birnessite-type manganese oxide was used as the Fenton catalyst for the treatment of POME. This oxide is a typical manganese oxide with an octahedral layered structured and was synthesized from the reduction of MnO4‾ using simple sugar (glucose) as a reducing agent by a solvent-free method. The characterization of the oxide was carried out using X-Ray Diffraction (XRD), Scanning Electron Microscopy-Energy Dispersive X-ray Spectroscopy (SEM-EDX), and Surface Area Analyzer (SAA). The characterization results indicated the birnessite-type manganese oxide with a well-crystalline structure, irregular shapes of morphology, and surface area of 4.180 m 2 /g. The degradation studies revealed that H2O2 concentration plays a key role in the COD removal of the POME. The maximum reduction in COD removal was 62% in 45 minutes of reaction with the catalyst concentration of 400mg/L and 10 ml of H2O2.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Preliminary Study on COD Removal on the Treatment of Palm Oil Mill Effluent (POME) Using Birnessite-Type Manganese Oxide via a Solvent-Free Method

Awaluddin¹,

Sonia²,

Muhdarina³

et al. 2021

Advances in Social Science, Education and Humanities Research

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The Catalytic Activity Of Manganosite MnO/Activated Carbon For Photo-Degradation Of Synthetic Dye

Awaluddin,

Amiruddin,

Siregar

et al. 2024

E3S Web Conf.

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Photocatalytic degradation of organic dye such as methylene blue (MB) has been on focused various research interest due to environmental impact. In this study, the composite manganosite MnO/activated carbon was synthesized by a facile one-pot of solgel method through the reaction between potassium permanganate, glucose and commercial activated carbon. The XRD result revealed the presence of rock-salt manganosite MnO in the composite. The catalytic studies were performed under different solution pH, different catalyst concentration and various initial MB concentrations. The result indicated that the catalyst is very effective for the degradation of MB at the basic condition (pH 9 and p11). The degradation of MB in an acidic environment, however, is much less than that of basic condition. In addition, an increase in initial MB concentration caused a decrease in MB degradation due to the saturation of the active sites of the catalyst. The maximum degradation of MB was 98.86 % achieved at pH 11, the initial MB concentration of 50 ppm, and the catalyst concentration of 35 mg.

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The Cu-doped cryptomelane-type octahedral molecular sieve manganese oxide synthesized by sol-gel for the degradation of methylene blue

Awaluddin¹,

Astuti²,

Linggawati³

et al. 2018

AIP Conference Proceedings

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Precursor effects on the morphology and crystallinity of manganese oxides and their catalytic application for methylene blue degradation

Cited by 6 publications

References 28 publications

Preliminary Study on COD Removal on the Treatment of Palm Oil Mill Effluent (POME) Using Birnessite-Type Manganese Oxide via a Solvent-Free Method

Preliminary Study on COD Removal on the Treatment of Palm Oil Mill Effluent (POME) Using Birnessite-Type Manganese Oxide via a Solvent-Free Method

The Catalytic Activity Of Manganosite MnO/Activated Carbon For Photo-Degradation Of Synthetic Dye

The Cu-doped cryptomelane-type octahedral molecular sieve manganese oxide synthesized by sol-gel for the degradation of methylene blue

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