Microporous Cobalt Ferrite with Bio-Carbon Loosely Decorated to Construct Multi-Functional Composite for Dye Adsorption, Anti-Bacteria and Electromagnetic Protection.
Guojuan MaDi LanYi ZhangXiyuan SunZirui JiaGuanglei WuGuixian BuPengfei YinPublished in: Small (Weinheim an der Bergstrasse, Germany) (2024)
Currently, facing electromagnetic protection requirement under complex aqueous environments, the bacterial reproduction and organic dye corrosion may affect the composition and micro-structures of absorbers to weaken their electromagnetic properties. To address such problems, herein, a series of CoFe 2 O 4 @BCNPs (cobalt ferrite @ bio-carbon nanoparticles) composites are synthesized via co-hydrothermal and calcining process. The coupling of magnetic cobalt ferrite and dielectric bio-carbon derived from Apium can endow the composite multiple absorption mechanisms and matched impedance for effective microwave absorption, attaining a bandwidth of 8.12 GHz at 2.36 mm and an intensity of -49.85 dB at 3.0 mm. Due to the ROS (reactive oxygen species) stimulation ability and heavy metal ions of cobalt ferrite, the composite realizes an excellent antibacterial efficiency of 99% against Gram negative bacteria of Escherichia coli. Moreover, the loose porous layer of surface stacked bio-carbon can promote the adsorption of methylene blue for subsequent eliminating, a high removal rate of 90.37% for organic dye can be also achieved. This paper offers a new insight for rational design of composite's component and micro-structure to construct multi-functional microwave absorber for satisfying the electromagnetic protection demand in complicated environments.
Keyphrases
- reduced graphene oxide
- aqueous solution
- high frequency
- reactive oxygen species
- escherichia coli
- highly efficient
- metal organic framework
- heavy metals
- gold nanoparticles
- carbon nanotubes
- quantum dots
- magnetic resonance imaging
- water soluble
- ionic liquid
- dna damage
- risk assessment
- computed tomography
- oxidative stress
- high intensity
- molecularly imprinted
- magnetic resonance
- cystic fibrosis
- pseudomonas aeruginosa
- silver nanoparticles