Synthesis of MnFe$lt;inf$gt;2$lt;/inf$gt;O$lt;inf$gt;4$lt;/inf$gt;/cellulose aerogel nanocomposite with strong magnetic responsiveness

Abstract

Cellulose aerogel, with abundant three-dimensional architecture, has been considered as a class of ideal eco-friendly matrix materials to encapsulate various nanoparticles for synthesis of miscellaneous functional materials. In the present paper, hexagonal single-crystalline MnFe 2 O 4 was fabricated and inserted into the cellulose aerogel using an in situ chemical precipitation method. The as-prepared MnFe 2 O 4 nanoparticles were well dispersed and immobilized in the micro/nanoscale pore structure of the aerogel, and exhibited superparamagnetic behavior. In addition, the nanocomposite was easily actuated under the effect of an external magnetic field, revealing its strong magnetic responsiveness. Combined with the advantages of environmental benefits, facile synthesis method, strong magnetic responsiveness, and unique structural feature, this class of MnFe 2 O 4 / cellulose aerogel nanocomposite has possible uses for applications such as magnetically actuated adsorbents.

Optimization of the Sound Absorption Coefficient (SAC) from Cellulose–Silica Aerogel Using the Box–Behnken Design

“… 35 , 77 Meanwhile, the sharp crystalline peaks appeared at 2θ = 12.30, 20.00, and 21.40° for the cellulose aerogel. 78 , 79 Furthermore, these peaks became weaker and appeared at approximately 2θ = 15–30°, showing that amorphous silica was formed, and the crystalline structure of the cellulose aerogel was significantly destroyed. 80 The explanation for this behavior is probably related to the disruption mechanism, in which the silica particles’ in situ composite on the cellulose surfaces disrupts the bundling of fiber into ribbons.…”

Catalytic effect of MnFe2O4on dehydrogenation kinetics of NaAlH4–MgH2

“…28 There is a satellite line of the Fe 2p 3/2 peak around 719.1 eV. 29 The XPS peaks of Mn 2p centered at 642.8 and 653.8 eV, respectively, come from either Mn(II) or Mn(VI). 30,31 Therefore, Mn is solely bivalent according to the valence of Fe.…”