Abstract
Red elemental nanoselenium was prepared by reducing sodium selenite with ascorbic acid using Arabic resin as template in this study. The factors effecting on the particle size change of nanoselenium such as reaction time, reactant concentration, template mass fraction and reaction temperature were studied. The orthogonal experiment L9(34) was designed to determine the optimal process conditions. The elemental nanoselenium was characterized by IR and particle size analyzer. The results showed that the stable red elemental selenium with nanometer scale was prepared.
Highlights
Red selenium has the general physicochemical properties, and has more excellent biological activity and lower toxicity than inorganic selenium and organic selenium
Because the red shift of the absorption peak is linear with the concentration of the product, it indicates that the absorption peak is caused by the formation of selenium in red monomer
To reduce the absorption of background, 410nm and 490nm were selected as the determination wavelength of nanoselenium solution, and the ratio of absorbance A450/A530 was used as the basis to characterize the particle size change of the product
Summary
Red selenium has the general physicochemical properties, and has more excellent biological activity and lower toxicity than inorganic selenium and organic selenium. It has been widely used in animal nutrition, medical and health care etc[1,2]. The preparation of red selenium was usually to reduce selenium salt or selenium compounds to form selenium monomer by reducing agent and kept the particle size at nanometer in various ways before it clustered into clusters. Template method is a method to generate the nanoparticles with uniform dispersion and proper particle size in the pore size of the carrier by using the appropriate compound as the carrier. The red nanoselenium was synthesized by using Arabic resin as template, characterized by IR and particle size analyzer, and the factors affecting the particle size were studied
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