Synthesis and catalytic activity of Birnessite-Type Manganese Oxide synthesized by solvent-free method

Siregar, Siti Saidah; Awaluddin, Amir

doi:10.1088/1757-899x/345/1/012005

Cited by 17 publications

(8 citation statements)

References 13 publications

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“…From Table 1, it is revealed that the surface area from the current work is 4.1802 m 2 /g, which is lower than that of citric or oxalicprepared birnessite. The surface area obtained in this work is higher than our previous study using the same reducing agent with higher calcination temperature The calcination at 700 o C leads to the reduction of the surface area into 3.564 m 2 /g and 23.1278 m 2 /g for the specific surface area [5]. In general, the low surface area was obtained at high calcination temperature due to sintering processes.…”

Section: Resultscontrasting

confidence: 52%

“…The surface morphology of the as-synthesized manganese oxide was investigated by SEM as shown in figure 2. From the image, it was revealed that the δ-MnO2 particles obtained in this work consist of aggregate particles with more irregular sizes compared to birnessite that was calcined at 700 o C for 7 hours [5]. This morphology with irregular sizes is also generated from using organic acid as a reducing agent via a solvent-free method [9].…”

Section: Catalytic Activitymentioning

confidence: 77%

“…The manganese oxide was prepared by a solventfree method as described by our previous work [5]. The mole ratio of KMnO4 and glucose was 3:1 and calcined at 500 o C for 7 hours.…”

Section: Synthesismentioning

confidence: 99%

“…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: Resultscontrasting

confidence: 52%

Section: Catalytic Activitymentioning

confidence: 77%

“…The manganese oxide was prepared by a solventfree method as described by our previous work [5]. The mole ratio of KMnO4 and glucose was 3:1 and calcined at 500 o C for 7 hours.…”

Section: Synthesismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

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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Visible–light driven photocatalytic degradation of bisphenol-A using ultrasonically synthesized polypyrrole/K-birnessite nanohybrids: Experimental and DFT studies

Zia

Ajeer

Riaz

2019

Journal of Environmental Sciences

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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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Synthesis and catalytic activity of Birnessite-Type Manganese Oxide synthesized by solvent-free method

Cited by 17 publications

References 13 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

Visible–light driven photocatalytic degradation of bisphenol-A using ultrasonically synthesized polypyrrole/K-birnessite nanohybrids: Experimental and DFT studies

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

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