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Water Vapor Adsorption by Some Manganese Oxide Forms

机译:某些氧化锰形式对水蒸气的吸附

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Manganese oxide forms prepared by different methods differ by their compositions, phase ratios in polyphase samples, and crystallite sizes (XRD and TEM characterization). Among the phases, tunnel-structured β-MnO2 (pyrolusite), α-MnO2 (cryptomelane), ε-MnO2 (akhtenskite), and β-Mn2O3 (bixbyite) have been identified. Water vapor sorption isotherms showed substantial differences in the affinities of water molecules to oxide surfaces of the manganese oxide forms under study. The parameters of the BET equation and pore size distribution curves have been calculated. The manganese oxide forms have mesoporous structures characterized by uniform and non-uniform pore sizes as well as by moderate hydrophilic behavior.
机译:用不同方法制备的氧化锰形式的组成,多相样品中的相比和微晶尺寸(XRD和TEM表征)不同。在这些相中,已经鉴定出隧道结构的β-MnO2(软锰矿),α-MnO2(隐球藻),ε-MnO2(akhtenskite)和β-Mn2 O 3(方铁矿)。在研究中,水蒸气的吸附等温线显示水分子对氧化锰形式的氧化物表面的亲和力存在显着差异。已经计算出BET方程的参数和孔径分布曲线。氧化锰形式具有介孔结构,其特征在于均匀和不均匀的孔径以及适度的亲水性。

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