基于不同锰源微乳液法合成MnMoO4?xH2O（x=0.9,1.5）及相应的带隙能研究

Preparation of MnMoO4?xH2O（x=0.9,1.5）by microemulsion method under different manganese precursors and their band-gap energy

摘要:

在不同锰源条件下，通过一个四元体系（CTAB/水/戊烷/戊醇）微乳液法合成MnMoO4?xH2O (x=0.9,1.5)，XRD和热重分析辅助证明：当锰源是MnCl2?4H2O能够合成出MnMoO4?0.9H2O，当锰源为C4H6MnO4?4H2O时产物为MnMoO4?1.5H2O。ω（CTAB/水）和不同锰源对最终产物结构有很大的影响。通过固体紫外吸收光谱图可以计算出：MnMoO4?0.9H2O的带隙能达到3.08eV，MnMoO4?1.5H2O的带隙能是3.04eV。

关键词:钼酸锰; 四元体系; CTAB;能带

Abstract:

Manganese molybdates MnMoO4?xH2O (x=0.9,1.5) could be obtained by the method of a microemulsion based on a quaternary system（CTAB/ water / pentane / isoamyl alcohol) under different manganese precursors. According to XRD , the DSC and TG traces, it was proved that MnMoO4?0.9H2O could be prepared under the precursor manganese of MnCl2?4H2O, and the other precursor manganese of C4H6MnO4?4H2O was MnMoO4?1.5H2O. And it was showed that ω([CTAB]/[H2O]) and the different manganese precursors had great influence of the microstructure of the final product. It could be well known from the solid ultraviolet spectra that the band-gap energy of MnMoO4?0.9H2O could reach up to 3.08eV, and MnMoO4?1.5H2O was 3.04eV.

Key words:Manganese molybdates, Quaternary system, CTAB, Band-gap Energy