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Porous copper was prepared by a resin curing and foaming method using a thermosetting phenol–formaldehyde resin as a binder and C5H10N6O2 as a foaming agent. The effects of resin content on the pore structure and sound absorption of the porous copper were investigated. The results show that the porosity and fractal dimension increase as the resin content increases, whereas the airflow resistivity...
A sonochemical method was introduced to synthesize SnO 2 nanoparticles in the pores of mesoporous carbon without any other agents. The nitrogen adsorption measurement and transmission electron microscopy results revealed that the SnO 2 nanoparticles with the average particle size of around 10nm were homogeneous distribution in the matrix. The aggregation of SnO 2 was hindered...
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