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METHOD FOR PREPARING HIGH EFFICIENCY CERIA CATALYST FOR AIR POLLUTION PURIFICATION USING HYDROTHERMAL SYNTHESIS
METHOD FOR PREPARING HIGH EFFICIENCY CERIA CATALYST FOR AIR POLLUTION PURIFICATION USING HYDROTHERMAL SYNTHESIS
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机译：使用水热合成制备高效率Ceria催化剂的高效率Ceria催化剂
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摘要
The present invention comprises the steps of (a) (i) adjusting the pH by adding a basic substance to a solution containing a cerium precursor and (ii) a zirconium or tin precursor; (b) hydrothermal reaction of the solution obtained in step (a) at a temperature of 120 to 220° C. to form ceria doped with zirconium ions or tin ions; (c) adjusting the pH by adding a basic substance to the solution containing the palladium precursor; (d) adding and stirring the zirconium ion or tin ion-doped ceria to the solution obtained in step (c) to form a zirconium ion or tin ion-doped ceria with palladium compound adsorbed on the surface; And (e) calcining the zirconium ion or tin ion doped ceria on which the palladium compound is adsorbed on the surface to prepare a catalyst powder; , According to the present invention, by adding (doping) a metal ion (Zr or Sn) to ceria, the ion radius difference (Ce ion: 103pm, Zr ion: 72pm, Sn ion: 69pm) according to the type and amount of added metal ion. ), the lattice shrinkage occurs due to the lattice distortion caused by the lattice shrinkage, and the specific surface area increases due to this lattice reduction, and the amount of oxygen participating in the reduction reaction increases due to the increase in surface energy, resulting in the ability to purify air pollutants. A catalyst having excellent phosphorus catalytic activity can be prepared.
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