Fig 2 - uploaded by Marina Aghayan
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SEM and EDS analyses of combustion products with (a) a low content of copper ( f = 1), (b) a high content of copper ( f = 1), and (c) a high content of copper ( f = 2).
Source publication
Copper oxide-doped alumina nanofibres were fabricated by the solution combustion method. The bundled alumina nanofibres were impregnated with a copper nitrate–glycine (oxidizer–fuel) solution and heat-treated in an open-air environment at 400 °C for 30 min. The microstructure and phase composition of the final product were characterized by XRD, SEM...
Contexts in source publication
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... which can oxidize very fast in air after the combustion process. Pure Al 2 O 3 is not found on the XRD pattern because of the large difference in the atomic scattering factors of copper and aluminium and low content of alumina in the combustion product. The SEM images of the combustion product with a low and a high content of CuO are presented in Fig. 2. It is obvious that the CuO particles are developed as separate fine-sized particles in the mixtures with the low concentration of CuO (Fig. 2a and b). The CuO particle sizes can be further decreased by increasing the amount of glycine in the starting mixture at a constant content of CuO (Fig. 2b and ...
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... in the atomic scattering factors of copper and aluminium and low content of alumina in the combustion product. The SEM images of the combustion product with a low and a high content of CuO are presented in Fig. 2. It is obvious that the CuO particles are developed as separate fine-sized particles in the mixtures with the low concentration of CuO (Fig. 2a and b). The CuO particle sizes can be further decreased by increasing the amount of glycine in the starting mixture at a constant content of CuO (Fig. 2b and ...
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... a low and a high content of CuO are presented in Fig. 2. It is obvious that the CuO particles are developed as separate fine-sized particles in the mixtures with the low concentration of CuO (Fig. 2a and b). The CuO particle sizes can be further decreased by increasing the amount of glycine in the starting mixture at a constant content of CuO (Fig. 2b and ...
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... conditions for further CuO particle growth and agglomeration. On the other hand, the extra amount of glycine also results in an increase in the amount of the emitted gas due to a reaction with oxygen from the environment. As a result, the gas outflow decreases the system's energy more rapidly and hampers further particle growth and agglomeration (Fig. 2b). During the combustion process, the developed CuO nanoparticles remain separated from one another on the surface of ...
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... presented in Fig. 2a, CuO is present in a wide range of particle sizes starting from some nanometres up to 200 nm. The EDS analysis proved that nanoparticles located in between nanofibres were copper oxide (Fig. 2b). ...
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Mn 3+-doped Al 2 O 3 was obtained by combustion method. It was found that the resulting powder, with particle sizes of 10-70 nm, consists of a mixture of transition aluminas (δ*, δ, θ), among which δ*-polymorph is dominant. The presence of Mn 3+ ions results in a wide absorption band in the 400-620 nm region, but no emission of these ions was obser...
