水热条件下碳纳米管/硫氧镁化合物纳米复合材料的制备和表征

Carbon nanotubes / magnesium oxysulfates (MOS) nanocomposite was prepared under different hydrothermal conditions. The samples were characterized by SEM, TEM, XRD and TG. The results showed that carbon nanotubes and the magnesium oxysulfates could form nanocomposite under the hydrothermal reaction and the morphology of the MOS compound coated on the carbon nanotubes varied with different reaction conditions.

硫氧镁化合物的水热合成、FTIR光谱和Raman光谱表征

采用水热合成技术,于160℃时控制MgSO_4-NaOH-H_2O四元交互体系的组分,分别制得了3种不同组成的硫氧镁化合物晶体,即MgSO_4·5Mg(OH)_2·2H_2O,2MgSO_4·Mg(OH)_2和2MgSO_4·Mg(OH)_2·2H_2O。给出了这3种化合物的FTIR光谱和Raman光谱,探讨了结构与光谱峰值的关系,并用SEM对晶体的形貌进行了表征。

Mg(OH)_2·2MgSO_4·2H_2O晶体的水热生长过程

对MgSO4-NaOH-H2O四元交互体系在160℃水热条件下,相同物料配比,不同反应时间的晶体生长过程进行了研究,得到5Mg(OH)2·MgSO4·2H2O(简称MOS)晶须和Mg(OH)2·2MgSO4·2H2O棒状晶体两种硫氧镁化合物.通过化学分析、X-ray粉末衍射、FT-IR光谱和SEM对反应产物进行了表征.前者是该体系水热条件下介稳产物,而新的硫氧镁化合物Mg(OH)2·2MgSO4·2H2O是该体系的稳定相.

MgSO_4-NaOH-H_2O四元交互体系在180℃水热条件下相互作用的动力学研究

In this paper,the forming and transforming process of the magnesium oxysulfates in a quaternary interaction system of MgSO 4 -NaOH-H 2 O under the hydrothermal conditions at 180℃has been investigated by usin g MgSO 4 and NaOH solutions as starting materials.This transforming process of prod uct phase from unstable phase to stab le phase with time has been proved by means of c hemical analysis,microphotograph,XRD and IR.

MgSO_4-NaOH-H_2O四元交互体系在210℃水热条件下相互作用的动力学研究

利用MgSO4溶液和NaOH溶液作起始原料,研究了在210℃水热条件下MgSO4 NaOH H2O四元交互体系中硫氧镁化合物的形成和转变过程,并用化学分析、显微照相、IR和XRD等方法证明了产物从不稳定物相向稳定物相转变的过程。

MgSO_4-NaOH-H_2O四元交互体系在200℃水热条件下相互作用的动力学研究

利用七水硫酸镁和氢氧化镁,研究了在200℃水热条件下合成产物的物相及其随时间的变化机制。