Document Details

Document Type : Thesis 
Document Title :
Synthesis, characterization and possible applications of ferrites/MWCNTs/polyaniline composites
التحضير و التوصيف و التطبيقات الممكنه لمخاليط الفريتات/ أنابيب الكربون النانوية/ بولي أنيلين
 
Subject : Faculty of Science 
Document Language : Arabic 
Abstract : Ferrites; MFe2O4, Polyaniline (PANI)/MFe2O4, and MFe2O4/Polyaniline (PANI)/Multi-Walled Carbon Nanotubes (MWCNTs) (where M = Co2+, Cu2+, Mg2+, Ni2+, and Zn2+) successfully synthesized through a facile and cost-effective method including sucrose auto-combustion and in-situ polymerization. X-ray diffraction (XRD) showed a complete formation of ferrites with tetragonal structure for CuFe2O4 and cubic for all others. The lattice parameters and crystallite sizes decrease with increasing Polyaniline (PANI) and multi-walled carbon nanotubes (MWCNTs) content. Fourier Transform Infrared (FT-IR) spectral study indicated ferrites' bond formation in MFe2O4, and Polyaniline (PANI)/MFe2O4 while not found in ternary hybrid composites. Transmission Electron Microscope (TEM) exhibited agglomerated spherically shaped clusters for CoFe2O4, MgFe2O4, and ZnFe2O4 while NiFe2O4 and CuFe2O4 showed cubic morphology, and confirmed the formation of the core-shell of ferrite surrounded by the Polyaniline (PANI) matrix indicated complete coating of Polyaniline (PANI) for ferrite and the other two components ferrite and multi-walled carbon nanotubes (MWCNTs). Magnetic measurements revealed ferromagnetic properties of all ferrites except for ZnFe2O4 indicating a paramagnetic one. The coercivity measurements indicated magnetically hard ferrites for CoFe2O4 and CuFe2O4, while others showed soft magnetic. On the other hand a drastic decrease in the magnetization of entire ferrites by their inclusion in the non-magnetic Polyaniline (PANI) matrix and multi-walled carbon nanotubes (MWCNTs). The interaction between Polyaniline (PANI)/MFe2O4 and MFe2O4/ Polyaniline (PANI)/ multi-walled carbon nanotubes (MWCNTs) increases the thermal stability of Polyaniline (PANI) as pointed out through thermogravimetric studies. The conductivity changed from metallic-like behavior for Polyaniline (PANI) and multi-walled carbon nanotubes (MWCNTs) to semi-conductor for composites by the inclusion of entire ferrites with an obvious improvement in the ferrites conductivities. This change was also proved via conductivity vs. frequency and through dielectric relaxation. Finally, the CPM40 composite indicated a great potential for using as an effective adsorbent for the removal of Phenol Red (PR) dye from aqueous solution. The adsorption kinetic was found to be endothermically favored and best fit to the pseudo-second order kinetic model. Keywords: auto-combustion, ferrites, conductivity, magnetic, PANI/MFe2O4 core-shell. 
Supervisor : Prof. Dr. Mohamed Gabal 
Thesis Type : Doctorate Thesis 
Publishing Year : 1445 AH
2023 AD 
Co-Supervisor : Prof. Dr. Yasser Al-Angari 
Added Date : Sunday, October 29, 2023 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
نواف حبيب الله السلميAlsulami, Nawaf HabibullahResearcherMaster 

Files

File NameTypeDescription
 49446.pdf pdf 

Back To Researches Page