| Because of the unique physical and chemical properties, nano-structured mesoporous metal oxides have broad application in catalysis, gas sensors, electrode materials, ceramics and other fields. This research enriched and developed the preparation methods of the nanostructured mesoporous metal oxides. Template-free solvothermal low-temperature heat treatment method adopted in this paper is a good way with simple reaction conditions, good product crystallization, high purity characteristics and green features. The samples were characterized by XRD, SEM, TEM and N2 adsorption-desorption analysis. A systematic study has been done for the effects of different experimental parameters on specific surface area and morphology of the samples. Research results obtained in this paper are as follows:The preparation of nanostructured mesoporous MgO: N2 adsorption-desorption analysis shows that the different reaction media has an important influence on surface area and morphology of the sample. With the pore size distribution 2-4 nm, the BET surface area and pore volume can reach up to 373.2 m2/g and 0.71 cm3/g when the volume ratio of distilled water to ethanol is 1:1. The reaction medium in the presence of distilled water is conducive to the formation of the regular morphology. We preliminary studied the formation mechanism of mesopores within the samples.The preparation of nanostructured mesoporous NiO: The SEM and SAED results show that the sample inherits the hexagonal morphology and single-crystal structure of the precursor. In the measured temperature range the morphology of the samples is more regular as the hydrothermal reaction temperature becomes higher.The preparation of nanostructured mesoporous In2O3: Without adding the templates, the difference of the alkali source has an important influence on the morphology of the product. This conclusion provided the experimental basis to to obtain the different morphology of products without using the templates.
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