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OALib Journal期刊
ISSN: 2333-9721
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PdO/CeO2类芬顿降解酸性橙7和水杨酸的催化性能
DOI: 10.1016/S1872-2067(14)60261-8, PP. 314-321
Keywords: 类芬顿反应,二氧化铈,氧化钯,降解,过氧化氢
Abstract:
？采用沉淀-沉积法制备了PdO/CeO2催化剂,并使用X射线衍射、高分辨透射电镜、N2吸附-脱附等温线、X射线光电子能谱和Raman光谱对催化剂进行了表征.表征结果显示,Pd在复合物中以Pd2+形式存在;PdO和CeO2间的相互作用提高了CeO2中的Ce3+含量.通过酸性橙7和水杨酸的类芬顿降解考察了PdO/CeO2的多相类芬顿和可见光芬顿催化活性.结果表明,PdO沉积显著地促进了水杨酸的类芬顿降解,催化剂的PdO含量为1.0at%时其活性最佳.染料酸性橙7在可见光照射条件下会引发染料光敏化效应.吸附的染料分子在光激发后通过界面电子注入促进了Ce3+自表面过氧物种的再生.由此,PdO负载和可见光照射的共同作用下,1.0PdO/CeO2催化剂的酸性橙7类芬顿降解速率常数为3.90h-1,为纯CeO2活性的50倍左右.
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