Catalytic Enhancement of Inductively Heated Fe 3 O 4 Nanoparticles by Removal of Surface Ligands
Catalytic Enhancement of Inductively Heated Fe 3 O 4 Nanoparticles by Removal of Surface Ligands
复制标题
通过去除表面配体增强感应加热 Fe 3 O 4 纳米颗粒的催化性能
DOI：
10.1002/cssc.202002775
复制
发表时间：
2020
期刊：
影响因子：
8.4
通讯作者：
Dorman, James A.
中科院分区：
文献类型：
--
作者：
Moura, Natalia S.;Bajgiran, Khashayar R.;Roman, Cameron L.;Daemen, Luke;Cheng, Yongqiang;Lawrence, Jimmy;Melvin, Adam T.;Dooley, Kerry M.;Dorman, James A.
催化中的热管理受到每种材料的传热效率的限制，导致能量损失，尽管目前的热工程策略。相反，磁性纳米颗粒（NPs）的感应加热在催化剂发生反应的表面产生热量，通过耗散减少废热。然而，合成具有最佳产热性能的磁性NPs需要界面配体，如油酸，作为散热器。在应用于亲水性介质之前，使用四甲基氢氧化铵（TMAOH）或吡啶进行表面处理以去除这些配体。在本研究中，对Fe3O4NPs进行了表面处理，研究了感应加热对1 -辛醇催化氧化的影响。而TMAOH在去除油酸方面不成功，吡啶处理使产热和产品收率增加了大约2.5倍。因此，表面活性剂的高效去除通过增加传热和可用表面位对感应加热催化具有深远的意义。
Heat management in catalysis is limited by each material's heat transfer efficiencies, resulting in energy losses despite current thermal engineering strategies. In contrast, induction heating of magnetic nanoparticles (NPs) generates heat at the surface of the catalyst where the reaction occurs, reducing waste heat via dissipation. However, the synthesis of magnetic NPs with optimal heat generation requires interfacial ligands, such as oleic acid, which act as heat sinks. Surface treatments using tetramethylammonium hydroxide (TMAOH) or pyridine are used to remove these ligands before applications in hydrophilic media. In this study, Fe3O4NPs are surface treated to study the effect of induction heating on the catalytic oxidation of 1‐octanol. Whereas TMAOH was unsuccessful in removing oleic acid, pyridine treatment resulted in a roughly 2.5‐fold increase in heat generation and product yield. Therefore, efficient surfactant removal has profound implications in induction heating catalysis by increasing the heat transfer and available surface sites.