A Novel Approach to FePt Assemblage and Synthesis

Abstract

FePt nanoparticles have been assembled on the surface of MCM-41 silicates. The incorporation resulted in highly dispersed particles. Under thermal treatment for 1 h at temperatures up to 560 °C, no signs of agglomeration occurred. The silicates have also been used as a template to assist in the solution synthesis of FePt particles. The resultant particles were distributed over the surface and possibly inside the silcate pores with a range of sizes (3−10 nm).

The use of preformed nanoparticles in the production of heterogeneous catalysts

“…2 (d) and (e)), we can see that particles are found across the surface of the material, however they tend to occur as clusters rather than being fully distributed as in the Fe-MCM system and the previously studied FePt MCM-41 material. 5,7 The clusters of nanoparticles are not large aggregates, rather individual particles that are packed closely together in a region of space, retaining their size. Further analysis of the Fe-puralox material found both areas of well distributed particles across the alumina surface (graphical abstract) and revealed some individual particles distributed across the surface next to a larger cluster (Fig.…”

“…5,7 Reactions were deemed complete when the hexane became colorless. For the iron oxide materials, the solution was still highly coloured after six hours of stirring only becoming clear after being left overnight.…”

“…Iron oxide nanoparticles were synthesized using the hydrothermal technique 18 involving the addition of Fe(CO) 5 …”

“…[1][2][3] This has largely arisen out of their size dependent properties, ease of preparation for FT active metals and large number of atoms at their surface. Despite the development in a number of chemical approaches 4 that give control over particle size and composition, and the subsequent assemblage of these preformed particles onto supports, 5 very few literature examples involving the addition of preformed nanoparticles to support materials exist. 3,6,7 This method is highly advantageous as it allows greater control over what species are assembled onto a support material and it removes the dispersion problems seen with metal clusters in traditional FT catalysts.…”

Temperature‐dependent polymorphic crystalline structure and melting behavior of poly(butylene adipate) investigated by time‐resolved FTIR spectroscopy

“…10 Fuller and his coworkers firstly reported the crystalline structures of PBA in 1930s. [12][13][14][15] Minke and Blackwell have revealed the single crystalline morphology of PBA and found that the polymorphic phenomenon of PBA, that is, PBA can crystallize into the a-form, b-form, and a mixture of both two crystals under different conditions. 16,17 The lattice parameters of two types of crystalline unit cells of PBA have been identified.…”