Co3O4/Bi2O3纳米粒子气相光催化降解甲苯的研究

Photocatalytic degradation of gas-phase toluene over nano-Co3O4/Bi2O3

采用微乳法及化学沉淀法制备了复合氧化物Co3O4/Bi2O3纳米粒子，结果表明，微乳法制备的复合氧化物Co3O4/Bi2O3粒子光催化活性更好；活性的提高程度与n（Co）：n（Bi）有关，其最佳配比为0．02：1；随着焙烧温度的增加，光催化活性提高，750℃焙烧的样品催化活性最好。以甲苯为目标反应物，考察了光照强度、甲苯的初始浓度、气相氧浓度、水蒸气含量对甲苯光催化降解反应速率的影响。

Co3O4/Bi2O3 nanoparticles were prepared by the chemical precipitation and the microemulsion chemical method . The photocatalytic oxidation reaction of toluene was used as model reaction to measure the photocatalytic activity of Co3O4/Bi2O3.The results show that the photocatalytic activity of the microemulsion chemical method is higher than that of the chemical precipitation.The increasing level of photocatalytic activity is up to the values of n（Co） ; n（Bi） and the best one is 0.02 ; 1.With the calcining temperature increasing, the photocatalytic activity is increasing, and the best calcining temperature is 750℃ .Using toluene as object reactant, we research the effect of the intensity of illumination, initial density of toluene, the density of oxygen and the amount of water on photocatalytic degradation reaction rate of toluene.