다공성 Cr2O3 나노육각기둥을 이용한 C2H5OH 센서

Abstract

Dense Cr-precursor nano-hexaprisms were prepared by heating the Cr-nitrate aqueous solution containing Hexamethylenetetramine and polyvinylpyrrolidone, which were converted into porous Cr2O3 nano-hexaprisms containing nanoparticles by heat treatment of Crprecursors at 600 for 2 h in air atmosphere. At the sensor temperature of 300 , porous Cr2O3 nano-hexaprism showed the high response (Rg/Ra, Rg: resistance in gas, Ra: resistance in air) to 100 ppm C2H5OH (Rg/Ra=69.8) with negligible cross-responses to 100 ppm CO and 5 ppm C6H6. The sensitive and selective detection of C2H5OH in porous Cr2O3 nano-hexaprism were discussed in relation to the morphology of nanostructures.