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凹凸棒土负载CeO2-La2O3复合材料制备表征及催化性能

, PP. 83-89

Keywords: 凹凸棒土,CeO2-La2O3,掺杂,复合材料,催化

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Abstract:

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%。

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