ABSTRACT:In this study, Few Layered Graphene (FLG)/Tin oxide (SnO2) nanocomposite synthesized by ultrasonic assisted synthesis (UAS) method. The uniformly distributed SnO2 NanoParticles (NPs) on FLG observed by various characterization techniques like electron microscopy techniques (HR-TEM and FE-SEM) for structure and lattice, phase analysis studied by X-ray diffraction (XRD) and functional groups identified by FTIR. Moreover the electrochemical properties of the FLG/SnO2 nanocomposite was investigated by cyclic voltammerty. The specific capacitance of the prepared FLG/SnO2 nanocomposite exhibited superior capacitive performance with high capacitance (365 F/g), excellent cyclic performance as compared with Pure SnO2 NanoParticles. Therefore, the FLG/SnO2 nanocomposite conceivably a sustainable electrode material for super capacitor and many more energy repository devices for sustainable technological development.
Preparation technique of TiO2 nanoparticles was carried out by Sonochemical method which uses ultrasound for chemical reaction. The ultrasound intensity plays two different roles. The dispersion and production of nanoparticles with broken chemical bonds. Titanium tetraisopropoxide, ethanol and sodium hydroxide are used as precursor materials. Sonochemical process at different amplitudes were carried out at room temperature. Further formed TiO2 Nanoparticles were characterized through X-Ray diffraction (XRD), Particle Size Analyzer (PSA), Transmission Electron Microscopy (TEM).
Green synthesis method is considered to best alternate technique for synthesis of various nanoparticles as it is ecofriendly and safe. Also it is cost effective, less time consuming and simple method compared to chemical synthesis. The Silver nanoparticles have wide range of applications ranging from electrical to biological field due to their properties. It is considered toxic to the microorganisms and thus used for biological purposes. Here we report the synthesis of silver nanoparticle by using Capsicum annuum L as the reducing agent and also as capping agent. The results suggest the formation of silver nanorods of 50 nm length with good antibacterial properties.
Tetragonal Copper Indium disulphide (CuInS2) nanoparticles in the size range of 80 nm were prepared by microwave assisted solution synthesis process. Three different Sulphur sources namely, thioacetamide (TAA), thiourea and l-cysteine were used in this process. In this regard, samples showed no evident difference in their morphological or structural properties when prepared by all through all three sources. Accordingly the band gap of all the samples remained close 2.2 eV and did not deviate much. However solar cell tests and photocatalytic degradation studies revealed the advantage of thiourea as a Sulphur source over its counterparts. A form factor (FF) of 34% and 73% degradation efficiency of methyl orange were shown by CuInS2 nanoparticles prepared by thiourea as opposed to 30% FF in other samples.
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