Optical and Electrical Properties of Sinag Carbon and Waste Petroleum after Acid Treatment and Its Comparison with Carbon Nanotubes

Abstract

Sinag carbon samples were prepared from wooden burning. The Four samaples were made to treat three of them by using some acids .The treatment of the three samples was made by the acids ( HCL,HNO3 and H2SO4:HNO3mixture ) .One of them is untreated. The optical properties of these samples were compared with control Multi Wall Carbon Nanotube sample (MWCNT).The optical properties of the prepared samples have been investigated by UV/VIS spectrophotometer .The absorption was found to be in the wavelength range (288 – 500) nm. The absorption coefficient is maximum for all samples compared to control and is maximum for that treated with HCL. The refractive index is less than the control for all samples in the range (315-382 nm). The minimum value is for sinag treated by HCL. The maximum optical conductivity is (1.35x1011 sec-1) for all samples at 357 nm, while it is at 336 nm for control. The results agree with theoretical relations. The optical Properties of four samples that made from Waste Petroleum Coke Powder (WPCP) were discussed and compared with a control .One sample was left without treatment ,while three samples were treated by acids (HCL,HNO3 and H2SO4:HNO3mixtur The control is Multi Wall Carbon Nanotube sample ( MWCNT). The optical characteristics of the prepared samples have been investigated by UV/Vis spectrophotometer in the wavelength range (288 – 500) nm. The maximum conductivity for all samples shift towards larger wave length ,where the maximum shift is at 480 nm for the sample treated with HCL .The absorption coefficient is larger compared to control and non treated one for samples treated with H2SO4:HNO3, the other two have values less than non treated one .The refractive index is smaller for all samples at all values less than 485nm ,except at about 346 nm for (MWCNT) control sample ,where it has minimum value at this point .The dielectric constant is smaller for all samples for wave length values less than 450 nm ,however for more than 490nm samples treated with HNO3 & HCL have larger values. This can be useful in electronic applications. V The transmission pattern obtained by FTIR resembles that of the UV pattern, which confirm our results.