Kaur Harmandeep, Kainth Money, Meena Sher Singh, Kang Tejwant Singh
Department of Chemistry, University Grants Commission (UGC) Centre for Advanced Studies-II, Guru Nanak Dev University Amritsar-143005 Punjab India
Solid State Physics Division, Bhabha Atomic Research Centre Mumbai 400 085 India.
RSC Adv. 2019 Dec 18;9(71):41803-41810. doi: 10.1039/c9ra09678g. eCollection 2019 Dec 13.
Inspired by the nano-segregation of ionic liquids (ILs) into bi-continuous structures constituting of arrays of ionic and non-ionic components, herein, a new and sustainable strategy for preparation of mesh-like nano-sheet α-FeO nanoparticles and their photo-catalytic activity under sunlight, is presented. For the purpose, metal (iron) containing ionic liquids (MILs), 1-alkyl-3-methylimidazolium tetrachloroferrates, [C mim][FeCl], ( = 4, 8 and 16), which not only act as precursors and solvents but also as structure directing agents have been used. Thus prepared NPs show MIL dependent structural, photophysical and magnetic properties. The catalytic efficiency of NPs has been tested for the photo-degradation of organic dyes (Rhodamine B) in aqueous solution under sunlight. The NPs are found to exhibit comparable catalytic efficiency under sunlight as compared to that observed under high intensity visible lamplight, without showing a decline in their catalytic efficiency even after 4 catalytic cycles. It is anticipated that the present work will provide a new platform for preparation of sunlight active nanomaterials for photo-catalytic applications with control over the structural and physical properties varying the molecular structure of MILs.
受离子液体（ILs）纳米分离成由离子和非离子成分阵列构成的双连续结构的启发，本文提出了一种制备网状纳米片状α-FeO纳米颗粒及其在阳光下光催化活性的新型可持续策略。为此，使用了含金属（铁）的离子液体（MILs），即1-烷基-3-甲基咪唑四氯铁酸盐，[C mim][FeCl]，（ = 4、8和16），它们不仅充当前驱体和溶剂，还充当结构导向剂。如此制备的纳米颗粒表现出依赖于MIL的结构、光物理和磁性特性。已测试了纳米颗粒在阳光下对水溶液中有机染料（罗丹明B）的光降解催化效率。发现这些纳米颗粒在阳光下表现出与在高强度可见光下观察到的相当的催化效率，即使经过4次催化循环后其催化效率也没有下降。预计本工作将为制备用于光催化应用的阳光活性纳米材料提供一个新平台，通过改变MIL的分子结构来控制其结构和物理性质。
