Synthesis and Catalytic Abilities of Silica-coated Fe3O4 Nanoparticle Bonded Metalloporphyrins with Different Saturation Magnetization

Abstract

In this paper, a series of nanoparticle bonded metalloporphyrins with different saturation magnetization were synthesized by a modified silanation method. Under geomagnetic field (5 9 10 -5 T), with the increase of the saturation magnetizations, the growth rate of yields of cyclohexanol in the cyclohexane oxidation with iodosylbenzene catalyzed by these nanoparticle bonded metalloporphyrins followed the order of ironporphyrin [ manganeseporphyrin [ cobaltporphyrin.

Immobilization of metalloporphyrins on CeO2@SiO2 with a core-shell structure prepared via microemulsion method for catalytic oxidation of ethylbenzene

“…[20,23], a solution of thionylchloride (9 mL) and metalloporphyrin carboxylic acid (100 mg) in chloroform (30 mL) were loaded in a round bottom flask and the solution was refluxed for 3 h. Then, chloroform and excess thionylchloride were distilled under reduced pressure from the flask and the obtained solution was redispersed in 15 mL fresh chloroform. Following that, 0.03 g 3-aminopropyltriethoxysilane (APTES) and 0.54 g triethyl-amine dissolved in 30 mL chloroform were slowly added into the above solution.…”

“…MnCPTPPCl was synthesized according to Ref. [20]. 250 mL of propanoic acid, 5.565 g of benzaldehyde and 2.625 g of 4-carboxy benzaldehyde were added into a three-neck flask and refluxed under stirring, and then 4.69 g of pyrrole was dropped through a funnel.…”

A feasible strategy for promoting activated sludge hydrolysis by using ironporphyrin modified Fe3O4 nanoparticles as an efficient biomimic catalyst

“…One way to overcome this shortcoming is immobilization of metalloporphyrins on a solid support such as alumina, zeolite, silica, layered synthetic compounds and nanotubes [24]. Among these supports, magnetic Fe 3 O 4 -NPs have been widely used because of the small size, the high surface to volume ratio and their easily separation and recovered capacity by a magnet [25,26].…”

Immobilization of cobalt porphyrin on CeO2@SiO2 core–shell nanoparticles as a novel catalyst for selective oxidation of diphenylmethane

“…It was found that these nanospheres have good magnetic responsiveness and thus can be recycled by employing an external magnetic field. Liu et al [13] adopted silica-coated Fe 3 O 4 nanoparticles as a carrier and synthesized a series of supported metalloporphyrin catalysts with different saturation magnetization. The influence of the saturation magnetization of magnetic Fe 3 O 4 nanoparticles on the catalytic abilities of supported metalloporphyrin was also investigated.…”