在不同锰源条件下,通过一个四元体系(CTAB/水/戊烷/戊醇)微乳液法合成了Mn Mo O_4·XH_2O(X=0.9,1.5)。XRD和热重分析证明:当锰源是Mn Cl_2·_4H_2O时,能够合成出Mn Mo O_4·0.9H_2O,当锰源为C4H6Mn O_4·_4H_2O时,产物为Mn Mo O_4·1.5H_2O。ω(CTAB/水的摩尔比)和不同锰源对最终产物结构有很大影响。通过固体紫外吸收光谱图可以计算出Mn Mo O_4·0.9H_2O的带隙能达到3.08 e V,Mn Mo O_4·1.5H_2O的带隙能是3.04 e V。
Manganese molybdates Mn Mo O_4·XH_2O(X=0.9,1.5) were obtained by a microemulsion method based on a quaternary system(CTAB/ water/pentane/isoamyl alcohol) under different manganese precursors. According to XRD, DSC and TG analyses, it is proved that Mn Mo O_4·0.9H_2 O can be prepared under the precursor of manganese of Mn Cl_2·_4H_2O, while under the precursor of manganese of C_4H6 Mn O_4·_4H_2O the product is Mn Mo O_4·1.5H_2 O. ω([CTAB]/[H_2O])(the molar ratio) and the different manganese precursors have great influence on the microstructures of the final products. It can be calculated from the solid ultraviolet spectra that the band-gap energy of Mn Mo O_4·0.9H_2 O could reach 3.08 e V, and that of Mn Mo O_4·1.5H_2 O is 3.04 e V.