Self-catalytic Synthesis Of Metal Oxide Nanoparticles/Silica Nanocapsules And Structure Regulation

Compared with traditionally bulk materials,the properties of nanoparticles of transition metal and transition metal oxide are suprior.Thus,transition metal and transition metal oxide with nanoscale can be utilized in a wider fields like chemica l catalysis,electrical catalysis,photocatalysis,gas sensor,electrode materials,biomedical appilication,energy conversion and energy storage.However,the major shortcoming of nanoparticles is that they are apt to aggregate which would cause the increase of specific surface are and thereafter the materials lost their unique character.To overcome this obstacle,nanoparticles would be usually incorporated with matrix material.Si O2,due to its low cost and great stability,has attracted a large number of scientists to work on.Hence,the research on the silica materials incorparated with nanoparticles is of great importance.In this work,silica materials incorporated with metal oxide nanoparticles were successfully prepared,based on the self-catalysis effect of APTES and appropriate precursor under neutral condition.Here are two major work:1.CuO@SiO2 nanocomposites were prepared via self-catalysis procedure and APTES as the sole silicon source.FT-IR,SEM and XRD mearsurement were carried out to anlyze the strcture and content of the product and the results are in accordance with anticipation and theory.Apart from that,the reductant reaction between MO and Na BH4 was chosen as the model reaction to testify the catalytic performance of the sample and the result reveals that the CuO@SiO2 nanocomposites exhibit good catalytic performance.2.Based on the C microspheres preapared by hydrotheremal reaction,CuO@SiO2 nanocapsules were synthsized with the average diameter of 550 nm.FTIR,SEM and XRD mearsurement were carried out to anlyze the strcture and content of the product and the results are in accordance with anticipation and theory.Apart from that,the reductant reaction between MO and Na BH4 was chosen as the model reaction to testify the catalytic performance of the sample and the result reveals that the CuO@SiO2 nanocomposites wxhibit good catalytic performance.