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Investigating the Electrochemical Behavior of Co-Zn Sulfides and Hydroxides on Copper Oxide Nano-structures Grown on Copper Foam for Application in Electrochemical Supercapacitors
, M.Sc. Thesis Sharif University of Technology ; Shahrokhian, Saeed (Supervisor)
Abstract
In the first part, Co-Zn hydroxides were deposited onto CuO nanorods, and their electrochemical behavior and capacitive performance were investigated. To this end, Cu(OH)2 nanorods were grown on copper foam through a chemical process. Then, Cu(OH)2 were converted to CuO nanorods via a calcination process. In the next step, Co-Zn-OH sheets were electrodeposited on CuO nanorods. FE-SEM images of the prepared electrodes demonstrate the formation of Co-Zn-OH nanosheets onto CuO nanorods. Crucial electrochemical evaluations such as cyclic voltammetry (CV), galvanostatic charge/discharge (GCD), rate capability, and electrochemical impedance spectroscopy (EIS) were carried out. According to the...
Nanocrystalline copper doped zinc oxide produced from copper doped zinc hydroxide nitrate as a layered precursor
, Article Advanced Powder Technology ; Volume 23, Issue 3 , 2012 , Pages 279-283 ; 09218831 (ISSN) ; Bagheri, N ; Sadrnezhaad, S. K ; Sharif University of Technology
Abstract
Undoped and copper doped nanostructured zinc oxides were synthesized by using a series of synthetic layered material, undoped and copper doped zinc hydroxide nitrates at various molar percentages of copper (2-10) within the layers as precursors. The layered materials were heat-treated at 500 °C to produce zinc oxide nanostructures with crystallite sizes in the range of 23-35 nm. Optical studies of the nanostructured copper doped zinc oxides showed the decrease in band gap with increasing content of the doping agent, copper
Zinc-stearate-layered hydroxide nanohybrid material as a precursor to produce carbon nanoparticles
, Article Journal of Alloys and Compounds ; Volume 509, Issue 5 , February , 2011 , Pages 2441-2444 ; 09258388 (ISSN) ; Bagheri, N ; Sadrnezhaad, S.K ; Sharif University of Technology
2011
Abstract
Zinc-stearate-layered hydroxide nanohybrid was prepared using stearate anion as an organic guest, and zinc layered hydroxide nitrate, as a layered inorganic host by the ion-exchange method. Powder X-ray diffraction patterns and Fourier transform infrared results indicated that the stearate anion was actually intercalated into the interlayer of zinc layered hydroxide nitrate and confirmed the formation of the host-guest nanohybrid material. Also, surface properties data showed that the intercalation process has changed the porosity for the as-prepared nanohybrid material in comparison with that of the parent material, zinc hydroxide nitrate. The nanohybrid material was heat-treated at 600 °C...