Reactivity of Manganese Sulphate From Sumbawa Manganese Ore With Precipitating Agent: Theoretical and Experimental Evaluation

Kusumaningrum, Retno; Widayatno, Wahyu Bambang; Nugroho, Dwi; Rochman, Nurul Taufiqu; Amal, Muhamad Ikhlasul; Noviyanto, Alfian

doi:10.1088/1742-6596/1191/1/012052

Cited by 2 publications

(1 citation statement)

References 4 publications

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“…Mn 2 O 3 NPs were synthesized by co-precipitation method according to the previous report with some modifications. 22 5 ml of aqueous 0.2 M MnSO 4 was stirred at 80 °C for 10 min and followed by adding of an aqueous solution of 5 M NaOH (dropwise) till the pH of the solutions become 12.5 (∼450 μl). The reaction mixture was continuously stirred for 2 h at constant temperature of 80 °C.…”

Section: Synthesis Of Mn 2 O 3 Nanoparticlesmentioning

confidence: 99%

Non-enzymatic Electrochemical Sensing of 3-Hydroxybutyric Acid by Incorporating Manganese Oxide Modified Electrode and Nitroprusside Electrolyte

Ngamaroonchote

Karn-orachai²

2022

J. Electrochem. Soc.

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The development of 3-hydroxybutyric acid (3-HB) biosensors via an electrochemical method is commonly based on the use of enzymes that display inherent instability. Here, a novel non-enzymatic 3-HB electrochemical sensor platform by incorporating manganese oxide nanoparticles (Mn2O3 NPs) modified screen printed carbon electrode (SPCE) and sodium nitroprusside (SNP) electrolyte was reported for the first time. The mechanism of this sensor based on the formation of electroactive SNP-HB species with assistance of Mn2O3 catalyst. By the enhanced electroactivity of the complex, 3-HB can be quantitatively measured based on the increased peak current and shifted peak potential in cyclic voltammograms of SNP reduction. SNP concentration and Mn2O3 loading were optimized for maximum current response. The sensitivity of as-prepared sensor system was examined under different pH values (6.4 – 7.4) in the range of 0 – 10 mM 3-HB. The highest sensitivity of 39.07 μA·mM−1·cm−2 and 5.84 mV·mM−1 with LOD of 0.5 mM was achieved at pH 7.4 of electrolyte solution. The proposed sensor provided favorable stability and selectivity against various interferents. In addition, the ability to quantitatively detect 3-HB in artificial urine was also demonstrated, suggesting that our sensor can be a promising candidate for practical applications.

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Section: Synthesis Of Mn 2 O 3 Nanoparticlesmentioning

confidence: 99%

Non-enzymatic Electrochemical Sensing of 3-Hydroxybutyric Acid by Incorporating Manganese Oxide Modified Electrode and Nitroprusside Electrolyte

Ngamaroonchote

Karn-orachai²

2022

J. Electrochem. Soc.

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Shape Modification of Manganese Oxide Prepared by Solvothermal: Effect of Precipitation Agent

Kusumaningrum¹,

Abi

Sukmarani³

et al. 2020

IOP Conf. Ser.: Mater. Sci. Eng.

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Nano-sized manganese oxide was synthesized by the solvothermal method. Manganese sulfate was used as a precursor, which is obtained from the Sumbawa manganese ore. Two kinds of the precipitating agent, ammonium persulfate and sodium hydroxide, were used in this study and the effect on the solvothermal product were examined thoroughly. The solvothermal temperature and time were 120°C for 18 hours, respectively, for both precipitating agents. The results showed that the phase of manganese oxide was influenced by the precipitating agent, as indicated by X-ray diffraction analysis. Phase <x-MnO2 was obtained from the reaction between MnSO4 and ammonium persulfate, while Mn3O4 for the sodium hydroxide. The formation of a-MnO2 was influenced by the excess of NH4 + which came from the manganese ore leaching into MnSO4. One notable finding in this study is that the morphology of manganese oxide was also affected by the precipitating agent. For instance, the shape of MnO2 and Mn3O4 was needle and sphere, respectively. Moreover, the strict long thinner needle of <x-MnO2 was formed and the aspect ratio increased at a higher temperature. While the particle size of Mn3O4 decreased with the increased temperature. These results imply that variation of a precipitating agent is imperative to obtain the specific manganese oxide product, including the shape.

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Reactivity of Manganese Sulphate From Sumbawa Manganese Ore With Precipitating Agent: Theoretical and Experimental Evaluation

Cited by 2 publications

References 4 publications

Non-enzymatic Electrochemical Sensing of 3-Hydroxybutyric Acid by Incorporating Manganese Oxide Modified Electrode and Nitroprusside Electrolyte

Non-enzymatic Electrochemical Sensing of 3-Hydroxybutyric Acid by Incorporating Manganese Oxide Modified Electrode and Nitroprusside Electrolyte

Shape Modification of Manganese Oxide Prepared by Solvothermal: Effect of Precipitation Agent

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