El-Enein S A Abou, Ali A M, Abdel-Monem Y K, Senna M H, Madkour Metwally
Department of Chemistry, Faculty of Science, Menoufia University Shibin El Kom Egypt
Radiation Chemistry Department, National Center for Radiation Research and Technology Cairo Egypt.
RSC Adv. 2019 Dec 18;9(72):42010-42019. doi: 10.1039/c9ra08080e.
A series of metal complexes were prepared from separate reactions of lanthanide nitrate salts (La(iii), Ce(iii), Sm(iii), Gd(iii) and Ho(iii)) with 4-methylbenzoylhydrazide. The structures of the complexes were confirmed by analytical studies, spectral measurements and thermal studies. Complexes were formed with different stoichiometries of 1 : 2 and 1 : 3 (M : L). The ligand chelates by the nitrogen and oxygen atoms of the amino and carbonyl groups of the hydrazide moiety in the neutral keto form. The coordination compounds were converted to metal oxide nanoparticles (MONPs) through solid state thermal decomposition as monocular source precursors. The obtained MONPs were investigated XRD, TEM and UV-Vis spectra. As a representative, CeO was utilized as a nanophotocatalyst to examine the photocatalytic activity of the MONPs for methylene blue (MB) photodegradation. CeO showed high removal of MB dye by 90.1% after UV illumination for 220 min. The reported method provides a generalized and systematic method for the preparation of many metal oxide nanoparticles with manageable and reproducible features.
通过镧系硝酸盐（La(iii)、Ce(iii)、Sm(iii)、Gd(iii)和Ho(iii)）与4-甲基苯甲酰肼的单独反应制备了一系列金属配合物。通过分析研究、光谱测量和热研究确定了配合物的结构。形成了化学计量比为1 : 2和1 : 3（M : L）的不同配合物。配体以中性酮形式通过酰肼部分氨基和羰基的氮原子和氧原子进行螯合。配位化合物通过固态热分解作为单源前驱体转化为金属氧化物纳米颗粒（MONPs）。通过XRD、TEM和UV-Vis光谱对所得的MONPs进行了研究。作为代表，CeO被用作纳米光催化剂来研究MONPs对亚甲基蓝（MB）光降解的光催化活性。紫外光照220分钟后，CeO对MB染料的去除率高达90.1%。所报道的方法为制备许多具有可控和可重复特性功能的金属氧化物纳米颗粒提供了一种通用且系统的方法。
