Octahedral molecular sieves: preparation, characterization and applications

Abstract

Synthesis and characterization of a thermally stable analogue of synthetic todorokite, octahedral molecular sieve (OMS-I), is reported.

Adsorption of Ribose Nucleotides on Manganese Oxides with Varied Mn/O Ratio: Implications for Chemical Evolution

“…Manganese oxides with different oxidation states like 2, 3 and 4 exist (Bish and Post 1988; Burns et al 1985;De Guzman et al 1993;Shen et al 1992) with decreasing average volume per Mn ion (A 3 ) in each form of the oxide (Li and Stanforth 2000). The prebiotic condition existing in the bottom of sea was essentially reducing (Wachtershauser 1988).…”

Efficient Oxidation of 2,3,6-Trimethyl Phenol using Non-Exchanged and H+ Exchanged Manganese Oxide Octahedral Molecular Sieves (K-OMS-2 and H–K-OMS-2) as Catalysts

“…Potassium containing OMS-2 (K-OMS-2) was synthesized using a variation of earlier reported procedures [26][27][28]. In a typical reaction, 42 mmol (6.65 g) KMnO 4 was added to 100 mL distilled-deionized water (DDW) to make mixture A.…”

Lithium Ion Extraction from Orthorhombic LiMnO2in Ammonium Peroxodisulfate Solutions

“…These compounds have shown different adsorptive properties for metal ions, depending on the size of the tunnel or the interlayer distance. For example, the spinel-type manganese oxide with a [1;3] network shows selective adsorption for lithium ions (1,2,(13)(14)(15)(16)(17)(18)(19), the hollandite type with a [2;2] tunnel for potassium ions (20,21), the birnessite type with a [2;R] layer for rubidium ions (22), and the todorokite type with a [3;3] tunnel for cesium ions (23)(24)(25). The…”