Online ISSN: 2515-8260

Keywords : graphene

Preparation Of Graphene Oxide And Its Reduction By Lemon Peel To Graphene And Diagnosed By Several Techniques

Rusul Rifat Jameel; Liqaa Hussein Alwan

European Journal of Molecular & Clinical Medicine, 2020, Volume 7, Issue 9, Pages 412-421

The research included the preparation of graphene oxide by Hummer and Modified Hummer method through a simple chemical reaction and in the presence of plant extracts, as the product was reduced by an aqueous extract of lemon peel, and the result was diagnosed using several techniques, including Fourier-transform infrared spectroscopy (FT-IR) and scanning electron Microscope (SEM) and X-ray diffraction (XRD) BET surface area, as the results of the (FT-IR) spectrum showed the appearance of oxygen groups in graphene oxide that were reduced into wafers. The results of XRD showed that the average crystal size of the prepared particles was 3.11nm, and the (SEM) showed that the prepared graphene minerals with enlargement strengths of 4.16μm and 41.6μm with diameters (1-10μm) had a large number of pores, and were in the form of transparent and thin plates And in a fluffy and folded shape, the results of the BET measurements indicated that the prepared graphene has a surface area of 169.16 m2 g / with an average pore diameter of about 3.58nm. In addition to studying some of the physical characteristics of graphene, such as the pH and the percentage of moisture, where the moisture content was (8.1%) and the pH was (7.1).

Supercapacitors as Energy Storing Device: A Review

Anshika Goel; Mukesh Kumar

European Journal of Molecular & Clinical Medicine, 2020, Volume 7, Issue 7, Pages 3586-3594

Supercapacitors are the efficient energy storing devices with advanced properties like high power density, better cycle life, and high durability. But due to less energy density they cannot be used in commercial sector. In order to remove this barrier graphene based electrodes are used in supercapacitors which results in high stability but lacking in high value of specific capacitance. In series of research, it has been suggested that graphene along with conducting polymers and metal oxides can be used as electrode material for supercapacitors in order to provide both high value of specific capacitance and stability. So, this review paper summarizes the recent studies of incorporation of graphene with conducting polymers and metal oxides based supercapacitors as efficient energy storing device.