Zinatloo-Ajabshir Sahar, Mortazavi-Derazkola Sobhan, Salavati-Niasari Masoud
Young Researchers and Elites Club, South Tehran Branch, Islamic Azad University, Tehran, Iran.
Institute of Nano Science and Nano Technology, University of Kashan, Kashan, P. O. Box. 87317-51167, Islamic Republic of Iran.
Ultrason Sonochem. 2017 Nov;39:452-460. doi: 10.1016/j.ultsonch.2017.05.016. Epub 2017 May 12.
In this work, highly photocatalytically active HoO-SiO nanocomposites have been designed and applied for decomposition of methylene blue pollutant. HoO-SiO nanocomposites have been produced by new, quick and facile sonochemical process with the aid of tetramethylethylenediamine as a novel basic agent for the first time. The effect of the kind of basic agent, ultrasonic time and dosage of Ho source on the grain size, photocatalytic behavior and shape of the HoO-SiO nanocomposites have been evaluated for optimization the production condition. FESEM, EDX, FT-IR, DRS, XRD and TEM have been applied to characterize the as-produced HoO-SiO nanocomposites. Use of the as-produced HoO-SiO nanocomposites as photocatalyst via destruction of methylene blue pollutant under UV illumination has been compared. It was observed that SiO has notable impact on catalytic activity of holmium oxide photocatalyst for destruction. Introducing of SiO to holmium oxide can enhance destruction efficiency of holmium oxide to methylene blue pollutant under ultraviolet light.
在这项工作中，设计了具有高光催化活性的HoO-SiO纳米复合材料，并将其应用于亚甲基蓝污染物的分解。首次借助四甲基乙二胺作为新型碱性试剂，通过新型、快速且简便的声化学方法制备了HoO-SiO纳米复合材料。评估了碱性试剂种类、超声时间和Ho源用量对HoO-SiO纳米复合材料的晶粒尺寸、光催化行为和形状的影响，以优化生产条件。采用场发射扫描电子显微镜（FESEM）、能谱仪（EDX）、傅里叶变换红外光谱仪（FT-IR）、漫反射光谱仪（DRS）、X射线衍射仪（XRD）和透射电子显微镜（TEM）对所制备的HoO-SiO纳米复合材料进行了表征。比较了所制备的HoO-SiO纳米复合材料在紫外光照射下通过破坏亚甲基蓝污染物作为光催化剂的应用情况。观察到SiO对氧化钬光催化剂的破坏催化活性有显著影响。将SiO引入氧化钬可提高氧化钬在紫外光下对亚甲基蓝污染物的破坏效率。
