Melanin-nano selenium and its preparation method

Abstract

The invention discloses a melanin-nano-selenium and a preparation method thereof, wherein the preparation method uses melanin as a reducing agent and a template for nano-selenium structure synthesis, and uses melanin to reduce a selenium dioxide solution, specifically comprising the following steps: preparing selenium dioxide Stock solution and melanin stock solution, then dilute the stock solution, mix and adjust the pH to 8.5, react in a dark, normal pressure environment at a constant temperature of 40°C, and stir in a constant speed water bath for 5 hours to obtain a sample, then filter the sample and collect the filtrate The melanin-nano-selenium solution is obtained, and finally the obtained melanin-nano-selenium solution is vacuum freeze-dried to obtain melanin-nano-selenium particles. The benefits of the present invention are: mild reaction conditions, easy implementation; wide source of melanin, low cost, excellent physical and chemical properties such as biodegradability, redox and metal chelation, non-toxic, and is an ideal reducing agent and templating agents.

Description

technical field [0001] The invention relates to nano-selenium and a preparation method thereof, in particular to melanin-nano-selenium and a preparation method thereof, and belongs to the field of chemical technology. Background technique [0002] Selenium is the active center of various enzymes in organisms, can participate in the body's antioxidant and energy metabolism, and is an essential substance to maintain the normal vitality of the body. A large number of studies have shown that nano-selenium has better bioavailability and lower toxicity than inorganic selenium and traditional organic selenium supplements, which makes nano-selenium a new focus in the research field and has a good role in the development of selenium supplementation products. application prospects. [0003] For the preparation of nano-selenium, the chemical reduction method is mostly used at present, but this method has disadvantages such as harsh reaction conditions, high cost, and toxic reducing ag...

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Problems solved by technology

[0003] For the preparation of nano-selenium, the chemical reduction method is mostly used at present, but this method has the disadvantages of harsh reaction conditions, high cost, toxic reducing agent and template agent, etc.

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