Abstract
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, Fe3O4 NPs 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.
| Original language | English |
|---|---|
| Pages (from-to) | 1122-1130 |
| Number of pages | 9 |
| Journal | ChemSusChem |
| Volume | 14 |
| Issue number | 4 |
| DOIs | |
| State | Published - Feb 18 2021 |
| Externally published | Yes |
Funding
N.S.M. acknowledges the fellowship support from the Louisiana College of Engineering, the Chevron Fellowship Award, the U.S. Department of Energy (DOE) under EPSCOR grant no. DE‐SC0012432 and John Harvey for the development of a pixel measurement tool to obtain nanoparticle size distributions. K.R.B. acknowledges the Louisiana Board of Regents (LEQSF(2016‐19)‐RD‐A‐03) for financial support. J.A.D., C.R., and K.M.D would also like to acknowledge the National Science Foundation, Chemical, Biological, Environmental, and Transport systems for funding under grant no. CBET‐1805785. This research used resources at the Spallation Neutron Source, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory. The authors thank Mr. Tochukwu Ofoegbuna for his assistance in performing XRD characterization. N.S.M. acknowledges the fellowship support from the Louisiana College of Engineering, the Chevron Fellowship Award, the U.S. Department of Energy (DOE) under EPSCOR grant no. DE-SC0012432 and John Harvey for the development of a pixel measurement tool to obtain nanoparticle size distributions. K.R.B. acknowledges the Louisiana Board of Regents (LEQSF(2016-19)-RD-A-03) for financial support. J.A.D., C.R., and K.M.D would also like to acknowledge the National Science Foundation, Chemical, Biological, Environmental, and Transport systems for funding under grant no. CBET-1805785. This research used resources at the Spallation Neutron Source, a DOE Office of Science User Facility operated by the Oak Ridge National Laboratory. The authors thank Mr. Tochukwu Ofoegbuna for his assistance in performing XRD characterization.
| Funders | Funder number |
|---|---|
| LEQSF | 2016‐19)‐RD‐A‐03 |
| Louisiana College of Engineering | |
| National Science Foundation | 1805785, CBET‐1805785 |
| U.S. Department of Energy | DE‐SC0012432 |
| Office of Science | |
| Oak Ridge National Laboratory | |
| Louisiana Board of Regents |
Keywords
- carboxylates
- colloids
- heterogeneous catalysis
- induction heating
- nanoparticles