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以凹凸棒土(ATP)为载体,以Ce(NO3)3.6H2O和La(NO3)3.6H2O为原料,以C6H12N4(HMT)为沉淀剂,采用均相沉淀法制备了不同铈镧比的CeO2-La2O3/ATP(Ce∶La=9∶1～3∶7,摩尔比,下同)复合材料。用TG-DSC、TEM、XRD和FTIR对所制备复合材料的微观结构和形貌进行表征,并分别考察不同铈镧比和H2O2添加量对酸性品红模拟废水脱色降解的影响。结果表明,当Ce∶La=5∶5时,CeO2-La2O3固溶体颗粒均匀分布在ATP表面,颗粒尺寸为5～10nm。随着铈镧摩尔比的增加,酸性品红的降解率呈先增后减的趋势,且当Ce∶La=5∶5、H2O2为10mL、酸性品红浓度为100mg/L时,降解效果最好,300min后的最大降解率达82%。
Using Ce (NO3) 3.6H2O and La (NO3) 3.6H2O as raw materials and C6H12N4 (HMT) as precipitating agent, CeO2- La2O3 / ATP (Ce: La = 9: 1 ~ 3: 7, molar ratio, the same below) composites. The microstructure and morphology of the composites were characterized by TG-DSC, TEM, XRD and FTIR. The effect of different cerium-lanthanum ratio and H2O2 dosage on the decolorization of acidic fuchsine wastewater was investigated. The results show that when Ce:La = 5: 5, CeO2-La2O3 solid solution particles are evenly distributed on the surface of ATP with the particle size of 5 ~ 10nm. The degradation rate of acidic magenta firstly increased and then decreased with the molar ratio of cerium and lanthanum. When Ce: La = 5: 5, H2O2 was 10 mL and the concentration of acidic magenta was 100 mg / L, the degradation rate of acidic magenta Well, after 300min the maximum degradation rate of 82%.