Synthesis And Performance Of Cu-based/h-BN Compound

Metal particles have been widely employed in catalysis,electronic devices,and biomedical sensors due to their unique physical chemistry properties.In general,they exhibit the commonality of nanomaterials with the high surface energies,which render these particles to aggregate desirably and therefore decrease the relevant properties.However,metal nanoparticles supported on nanosheets not only exploit their own advantages but also show a synergistic effect between them,which are favorable for their practical applications.In this paper,we report a facile synthesis of Cu-based/h-BN nanocomposites and explore the relevant performance by using the obtained Cu/h-BN composites as catalysts.This thesis mainly carried out the following three aspects:(1)we prepared CuO nanoparticles supported on h-BN by deposition-precipitation for CO oxidation,which exhibit benign catalytic performance.We also studied the feasibility by using the obtained CuO/h-BN composites as catalysts for the hydrogen generation from ammonia borane which is a moderate reductant.Thus Cu metal nanoparticles were obtained via in-situ reduction of CuO in a moderate reductant ammonia borane,which offer an original method for the preparation of BN based metal nanoparticle.(2)A facile synthesis of the Cu/h-BN nanocomposites were achieved via solvothermal method.The resulting Cu/h-BN composites exhibited high catalytic activity and good recycling performance for the hydrogen generation from the hydrolysis of ammonia.Furthermore,the kinetics of the hydrolysis reaction were investigated in details,the activation energy was measured,which is lower than most of the reported values by other catalysts.(3)We prepared Cu nanoparticles covered and highly dispersed by h-BN layers,which shows excellent activity in photocatalytic hydrolysis under visible light by use of eosin as photosensitizer.This study has significance for future research.