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کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: Nanochemistry Research
- نوع مقاله: Journal Article
- کلمات کلیدی: Band gap,SDS,CTAB,ferrites nanoparticles,microwave sol-gel auto-combustion method
- چکیده:
- چکیده انگلیسی: Cu and Ni ferrites as the semiconductor materials were synthesized by a microwave sol-gel auto-combustion method. Two cationic surfactants, sodium dodecyl sulfate (SDS) and cetyltrimethylammonium bromide (CTAB), were applied and the influence of surfactants on the properties of the Cu and Ni ferrite particles was studied. The samples were characterized by X-ray powder diffraction (XRD) pattern, scanning electron microscope analysis (SEM), Fourier transform infrared (FT-IR) spectroscopy and diffuse reflectance spectra (DRS). Powder XRD analysis and FT-IR spectroscopy confirmed the formation of ferrite spinel phase. The crystallite size was calculated to be 50-95 nm using Scherrer’s equation. The morphology and size of the synthesized nanoparticles have been observed by scanning electron microscopy. The particles were agglomerated without using surfactant. Using CTAB leads to the samples with layer shapes, and using SDS leads to the samples with pyramidal shapes. The energy band gaps calculated from UV–DRS absorption by using Kubelka-Munk equation were 1.68-1.77 eV, indicating that band gap of Cu ferrites becomes small and band gap of Ni ferrites becomes large in the presence of surfactant.
- انتشار مقاله: 27-11-1395
- نویسندگان: Mahnaz Kamel Attar Kar,Faranak Manteghi,Reza Fazaeli,Mehdi Ghahari
- مشاهده
- جایگاه : پژوهشی
- مجله: Advanced Journal of Chemistry-Section A
- نوع مقاله: Journal Article
- کلمات کلیدی: Ionic polymer metal composite (IPMC),Electroless plating method,Actuating application
- چکیده:
- چکیده انگلیسی: In this study, ionic polymer metal composite was fabricated using the optimized chemical electroless plating (CEP) method. Bath ultra-sonication was employed to deposit the platinum ions on the nafion sheet which decreased the time of deposition from 24 h to 3 h. Morphology of the fabricated ionic polymer metal composite (IPMC) was characterized using the atomic force microscopy (AFM) and field emission scanning electron microscopy (FESEM). A smooth platinum layer with the thickness of about 1 µm was deposited on the nafion sheet after one step deposition. Strain analysis also revealed high quality electrode deposition on the nafion sheet. Inductively coupled plasma (ICP) spectroscopy was utilized to measure the quantitative deposition of Pt ions on the nafion sheet through sonication process. 97.4% of the Pt ions in the solution were deposited on the nafion using the optimized CEP process. Voltage-angle and force-voltage characterizations were also employed to assess the actuation application of the fabricated IPMC.
- انتشار مقاله: 22-07-1398
- نویسندگان: Matin Sadat Saneei Mousavi,Faranak Manteghi,Mohammadreza Kolahdouz
- مشاهده