High-efficiency manufacturing method of activated carbon supported with nanometal or metal oxide

摘要

PPROBLEM TO BE SOLVED: To efficiently prepare a high activity and large surface area activated carbon carrying a nano-sized metal or metal oxide. PSOLUTION: A method for manufacturing the activated carbon carrying metal or metal oxide nanoparticles is provided which is characterized by forming metal or metal oxide particles on an activated carbon surface through a mixing step of dissolving one or more metal compounds in one or more solvents, uniformly mixing the resulting solution with the activated carbon and carrying out vacuum treatment under stirring; an adsorption step of adsorbing the metal compounds on the activated carbon by treating the mixture under stirring under predetermined conditions for a predetermined time; and a thermolysis step of decomposing the metal compounds by heating to a temperature not less than their decomposition temperatures under predetermined atmosphere conditions. In the adsorption step, the mixture of the solution of the metal compounds with the activated carbon is poured into an airtight container, high-pressure carbon dioxide is introduced and stirring is carried out under a predetermined temperature and pressure for a predetermined time to adsorb the metal compounds on the activated carbon. A condition in the high-pressure carbon dioxide treatment in the adsorption step is a supercritical state. The thermolysis step is carried out in supercritical carbon dioxide or by microwave heating under atmospheric pressure. PCOPYRIGHT: (C)2007,JPO&INPIT