Applied Catalysis A: General ( IF 4.7 ) Pub Date : 2020-08-04 , DOI: 10.1016/j.apcata.2020.117767 Karolina Kucio , Barbara Charmas , Volodymyr Sydorchuk , Svitlana Khalameida , Oleg Khyzhun
In the paper, Ce-Zr oxide compositions were prepared using the coprecipitation and mechanochemical mixing methods of the initial precipitated oxides CeO2 and ZrO2. The effects of mechanochemical treatment (MChT), hydrothermal treatment (HTT) and microwave treatment (MWT) on the structure and physicochemical properties of the obtained samples were investigated. The obtained materials were characterized using the N2 adsorption/desorption, XRD, thermogravimetry (TG, DTA) and UV–vis/DRS, XPS methods. The photocatalytic properties of the prepared materials were tested as the rhodamine B degradation under visible light. Moreover, their mechanocatalytic activity was investigated. As a result of mechanochemical, hydrothermal and microwave treatment, almost all the obtained materials were characterized by a larger specific surface area. The use of both hydrothermal and microwave treatments of the wet gel resulted in the formation of the solid solution CeO0,2ZrO0,8O2. The obtained samples exhibited an increased photo- and mechanocatalytic activity under visible light.
中文翻译:
Ce-Zr氧化物光催化剂的合成与改性
本文采用初始沉淀的氧化物CeO 2和ZrO 2的共沉淀和机械化学混合方法制备了Ce-Zr氧化物组合物。研究了机械化学处理(MChT),水热处理(HTT)和微波处理(MWT)对所得样品的结构和理化性质的影响。使用N 2对获得的材料进行表征吸附/解吸,XRD,热重分析(TG,DTA)和UV-vis / DRS,XPS方法。测试了所制得材料的光催化性能,如若丹明B在可见光下的降解。此外,研究了它们的机械催化活性。通过机械化学,水热处理和微波处理,几乎所有获得的材料都具有较大的比表面积。湿凝胶的水热处理和微波处理均导致形成固溶体CeO 0,2 ZrO 0,8 O 2。获得的样品在可见光下表现出增加的光催化和机械催化活性。