多孔ZnO/膨润土臭氧催化剂的制备及表征

PREPARATION AND CHARACTERIZATION OF THE POROUS ZnO/BENTONITE OZONE TYPE CATALYST

以钠基膨润土为催化剂载体,Zn(NO_3)_2为锌源,硫酸和炭粉为改性剂,采用膨润土-Zn(NO_3)_2溶液混合法制备了多孔Zn O/膨润土臭氧催化剂,通过对酸性大红模拟染料溶液臭氧进行催化降解实验,考察了H2SO4质量分数、加炭质量分数、Zn(NO_3)_2浓度和焙烧温度等因素对催化剂性能的影响,并通过XRD、BET技术对催化剂的结构进行了表征分析。实验结果表明:催化剂的最佳制备工艺条件为H_2SO_4质量分数为10%、加炭质量分数为6%、Zn(NO_3)_2溶液浓度为1.0 mol/L和焙烧温度为500℃,对染料的降解率最大可达94.56%。

With sodium bentonite as the catalyst carrier,Zn（ NO_3）_2as the zinc source,sulfuric acid and carbon powder as the modifier,the porous Zn O / bentonite ozone type catalyst was successfully prepared by bentonite-Zn（ NO_3）_2solution blending method. Then the catalytic experiments on acid scarlet dye solution by ozone were carried out. The experiments gave a separate exploration on the influence of catalyst performance,the factors were H_2SO_4 mass fraction,carbon mass fraction,Zn（ NO_3）_2concentration and calcination temperature. And the structure of the catalyst was explored by using XRD and BET techniques. The optimized preparation condition were as follows： The H_2SO_4 mass fraction was at 10%,carbon mass fraction at 6%,Zn（ NO_3）_2solution concentration at 1. 0 mol / L,and roasting temperature at 500 ℃,and then the maximum degradation rate of the dye matters could reach 94. 56%.