Document Details

Document Type : Article In Journal 
Document Title :
Synthesis and physical properties of mixed Co3O4/CoO nanorods by microwave hydrothermal technique
Synthesis and physical properties of mixed Co3O4/CoO nanorods by microwave hydrothermal technique
 
Subject : Physics 
Document Language : English 
Abstract : A mixture of crystalline Co3O4/CoO nanorods with non-uniform dense distribution has been successfully synthesized by microwave hydrothermal technique. The synthesized nanorods have been characterized by several techniques such as X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray spectroscopy (EDX), and Fourier transforms infrared spectroscopy (FT-IR). The results showed that the as synthesized specimens contained mixed crystalline Co3O 4/CoO nanorods with an average length of around 80 nm and an average diameter of 42 nm. UV-Vis spectrum of the nanorods exhibited a strong UV emission. The band energy gap of the product was 1.79 eV which lies between the energy gap of CoO and that for Co3O4. The obtained carrier concentration is of the order 4.32 × 1027 m-3 and the dielectric constant is found to be 4.89. The electrical conductivity increases with increasing temperature and behaves as a semiconducting material with an activation energy of a bout 0.26 eV. This makes the as synthesized mixed Co3O4/CoO nanorods very useful for supercapacitor devices application. Magnetic hysteresis loops at room temperature of the as synthesized mixed oxides (Co3O4/CoO) nanorods exhibit typical soft magnetic behavior. 
ISSN : 0749-6036 
Journal Name : Superlattices and Microstructures 
Volume : 50 
Issue Number : 5 
Publishing Year : 1432 AH
2011 AD 
Article Type : Article 
Added Date : Sunday, February 5, 2012 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
ريم محمد الطويرقيAl-Tuwirqi, Reem MResearcherDoctorateraltuwirqi@kau.edu.sa
أحمد عبدالله الغامديAl-Ghamdi, Ahmad AResearcherDoctorateAGAMDI@kau.edu.sa
فاتن إبراهيم الحازميAl-Hazmi, Faten EResearcherDoctoratefialhazmi@kau.edu.sa
فوزية محمد النويصرAl-Nowaiser, Fawziya MResearcherDoctoratefalnowaiser@kau.edu.sa
عطية علي الغامديAl-Ghamdi, Attieh AliResearcherDoctorate 
Nadia Abdel AalAbdel Aal, Nadia ResearcherDoctorate 
Farid K El-TantawyEl-Tantawy, Farid KResearcherDoctoratefaridtantawy@yahoo.com

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