| 초록 |
In this study, we directly synthesized Ti doped MoO2 microparticles using ultrasonic spray pyrolysis without conventional reducing agent such as hydrogen gas or ethylene glycol. Ti dopant acted as reducing agent as well as enhancing phase stability of MoO2 structure and reducibility in reducing atmosphere, probably due to the effect of Ti on the binding strength of oxygen atoms in MoO2 structure. In conventional wet impregnation method, dopant material is easily aggregated or segregated from doped structure. Therefore, uniform distribution of dopant is necessary to maximize the functionality of dopant. Unlike this conventional method, ultrasonic spray pyrolysis is an attractive way to create high purity homogeneous structures with spherical geometry. In addition, since the ultrasonic spray pyrolysis system operates continuously, mass production is possible. From these advantages, Ti doped MoO2 microparticles were successfully synthesized by ultrasonic spray pyrolysis at the rate of 4.5g/h in a continuous process. The product particles were systematically characterized by XRD, FE-SEM, EDX, and BET. |
