Sai Kumar - Academia.edu (original) (raw)
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In this present work, a new surfactant-assisted combustion method has been performed to synthesiz... more In this present work, a new surfactant-assisted combustion method has been performed to synthesize α-Fe2O3 powders by using iron nitrate as an oxidizer, glycine as a fuel and TWEEN 80 as a non-ionic surfactant. The effects of the fuel at different molar ratios assisted with surfactant are investigated with XRD, DT/TGA, UV-Vis Spectroscopy, FT-IR and SEM techniques. The investigation range of molar ratios of oxidizer is 0.1M; fuels are of molar ratios 0.1M, 0.15M, 0.2M, 0.25M and 0.3M and with surfactant ratio 0.07M have been studied. Structural characterization of different samples is investigated by X-ray Diffractometer. From X-ray Diffraction data lattice parameters, crystallite sizes, micro strains, cell volumes and porosities of the samples are calculated. The average crystallite sizes of the samples are obtained by Debye-Schererr's formula and Williamson-Hall plot. The XRD result also indicates rhombohedral system (R3c) with lattice parameters a=5.035Ao and c= 13.748Ao with the JCPDS data card no: 33-0664. Thermal studies of the samples are analyzed by TG/DTA analysis. Particle size distributions were observed by Particle size analyzer. Surface morphology of the samples is studied by scanning electron microscopy.
In this paper, synthesis of ZnO nanoparticles is done by a simple and facile surfactant assisted ... more In this paper, synthesis of ZnO nanoparticles is done by a simple and facile surfactant assisted combustion synthesis. The synthesis of ZnO nanoparticles has been prepared using Zinc nitrate as a precursor material, glycine as a fuel with the support of non-ionic surfactant TWEEN 80. The obtained ZnO nanoparticles have been studied using characterization techniques like X-ray diffraction (XRD), Transmission Electron Microscopy (TEM), and UV-Vis Spectroscopy. XRD results reveal that the sample is crystalline with a hexagonal wurtzite phase. X-ray peak broadening analysis was used to evaluate the crystallite sizes and lattice strain by the Williamson-Hall (W-H) analysis. Further appropriate physical parameters such as strain, stress, and energy density values were also calculated using W-H analysis with different models, viz, uniform deformation model, uniform deformation stress model and uniform deformation energy density model. Transmission electron microscopy (TEM) result reveals that the ZnO nanoparticles sample is spherical in shape showing particle sizes less than 40 nm. The optical properties of ZnO nanoparticles were studied by UV-Vis spectroscopy.
In this present work, a new surfactant-assisted combustion method has been performed to synthesiz... more In this present work, a new surfactant-assisted combustion method has been performed to synthesize α-Fe2O3 powders by using iron nitrate as an oxidizer, glycine as a fuel and TWEEN 80 as a non-ionic surfactant. The effects of the fuel at different molar ratios assisted with surfactant are investigated with XRD, DT/TGA, UV-Vis Spectroscopy, FT-IR and SEM techniques. The investigation range of molar ratios of oxidizer is 0.1M; fuels are of molar ratios 0.1M, 0.15M, 0.2M, 0.25M and 0.3M and with surfactant ratio 0.07M have been studied. Structural characterization of different samples is investigated by X-ray Diffractometer. From X-ray Diffraction data lattice parameters, crystallite sizes, micro strains, cell volumes and porosities of the samples are calculated. The average crystallite sizes of the samples are obtained by Debye-Schererr's formula and Williamson-Hall plot. The XRD result also indicates rhombohedral system (R3c) with lattice parameters a=5.035Ao and c= 13.748Ao with the JCPDS data card no: 33-0664. Thermal studies of the samples are analyzed by TG/DTA analysis. Particle size distributions were observed by Particle size analyzer. Surface morphology of the samples is studied by scanning electron microscopy.
In this paper, synthesis of ZnO nanoparticles is done by a simple and facile surfactant assisted ... more In this paper, synthesis of ZnO nanoparticles is done by a simple and facile surfactant assisted combustion synthesis. The synthesis of ZnO nanoparticles has been prepared using Zinc nitrate as a precursor material, glycine as a fuel with the support of non-ionic surfactant TWEEN 80. The obtained ZnO nanoparticles have been studied using characterization techniques like X-ray diffraction (XRD), Transmission Electron Microscopy (TEM), and UV-Vis Spectroscopy. XRD results reveal that the sample is crystalline with a hexagonal wurtzite phase. X-ray peak broadening analysis was used to evaluate the crystallite sizes and lattice strain by the Williamson-Hall (W-H) analysis. Further appropriate physical parameters such as strain, stress, and energy density values were also calculated using W-H analysis with different models, viz, uniform deformation model, uniform deformation stress model and uniform deformation energy density model. Transmission electron microscopy (TEM) result reveals that the ZnO nanoparticles sample is spherical in shape showing particle sizes less than 40 nm. The optical properties of ZnO nanoparticles were studied by UV-Vis spectroscopy.