Method of manufacturing metal nanoparticle-oxide support complex structure based gas sensor

A method of producing a metal nanoparticle-oxide support complex structure, the method comprising:

• a step (step 1) of mixing a precursor of the metal nanoparticle with a precursor of the oxide support to form a first mixture and additionally mixing a mixture of graphene oxide and nanocellulose with the first mixture of the precursor of the metal nanoparticle and the precursor of the oxide support to form a second mixture, wherein the second mixture consists of the precursor of the metal nanoparticle, the precursor of the oxide support, graphene oxide, and nanocellulose;
• a step (step 2) of preparing a solid solution by calcining and sintering the second mixture of the step 1;
• and
• a step (step 3) of forming the metal nanoparticles on the surface of the oxide supports by heat-treating the solid solution of the step 2 in a reducing atmosphere,
• wherein the graphene oxide and the nanocellulose are removed through the step 2, and
• wherein the precursor of the metal nanoparticle is an iridium (Ir) salt, and the precursor of the oxide support is a tungsten (W) salt.