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Paterson, David

doi:10.1097/01241398-198112000-00013

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“…Evidence of Layered Materials. One way to confirm that a layered material is present is to use organic ammonium ions to pillar the material. , The XRD pattern of hexylammonium ion pillared AC10 is shown in Figure . For this pillared material, its d spacing increased from 7.0 Å for OL-1 to 17.5 Å and diffraction reflections of up to fifth order were observed from {001} planes, which indicates that a well ordered layered material was present.…”

Section: Resultsmentioning

confidence: 99%

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Syntheses of Birnessites Using Alcohols as Reducing Reagents: Effects of Synthesis Parameters on the Formation of Birnessites

Luo

Suib

1999

Chem. Mater.

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This study shows that synthetic birnessite, an octahedral layered manganese oxide material called OL-1 can be synthesized with Na + , K + , Na + /Mg 2+ , or K + /Mg 2+ ions as interlayer cations by redox reactions between permanganate and alcohols in a strong basic media. The synthesis processes were followed by powder X-ray diffraction (XRD) studies. OL-1 samples have been characterized by XRD, chemical analysis, average oxidation states measurements, and scanning electron microscopy studies. Results show that all OL-1 samples have an interlayer spacing of ∼7.0 Å. The average oxidation states of manganese fall in a range of 3.60-3.70. The chemical compositions for typical Na-OL-1 and K-OL-1 are Na 4.7 Mn 14 O 27.7 ‚8.7H 2 O and K 4.6 Mn 14 O 27.9 ‚6.6H 2 O, respectively. R-MnO(OH) coexists with Na-OL-1 in the synthesis where NaMnO 4 aqueous solution is added to the solution containing ethanol, water, and sodium hydroxide. When Mg(MnO 4 ) 2 was used as the oxidant, more Mg 2+ ions were accommodated in OL-1 than in previous reports. The interlayer space is propped opened by intercalating hexylammonium ions between the layers, confirming the layered structure.

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Section: Resultsmentioning

confidence: 99%

“…Pillaring Process. This method is used to check whether a material is a layered material. , Our samples were completely washed before mixing with 1 M HCl and stirring overnight. The acid-treated sample was then reacted with hexylamine at room temperature overnight.…”

Section: Methodsmentioning

confidence: 99%

Syntheses of Birnessites Using Alcohols as Reducing Reagents: Effects of Synthesis Parameters on the Formation of Birnessites

Luo

Suib

1999

Chem. Mater.

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Syntheses of Birnessites Using Alcohols as Reducing Reagents: Effects of Synthesis Parameters on the Formation of Birnessites

Syntheses of Birnessites Using Alcohols as Reducing Reagents: Effects of Synthesis Parameters on the Formation of Birnessites

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