Abstract
SnO2 aerogels were successfully synthesized via ambient pressure drying method in which formamide or sodium dodecyl benzene sulfonate (SDBS) was added to control the microstructure of SnO2 aerogels. Subsequently, the result of Fourier transform infrared spectroscopy (FTIR) shows formamide does not participate in the whole chemical reaction, but regulates the agglomeration of SnO2 aerogels relying on hydrogen bond. Furthermore, formamide can hinder the polymerization and condensation of non-bridging hydroxyl to a certain extent and adjust the pore structure of SnO2 aerogels within 300 nm confirmed by means of field emission scanning electron microscopy (FESEM) and adsorption–desorption isotherm of N2. Finally, through the measurement of thermal conductivity, it is shown that formamide can reduce the thermal conductivity of SnO2 aerogels.
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