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A One-Pot Preparation of Nanoparticles with Different Shapes
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A nanoparticle, morphology technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as poor biocompatibility
Active Publication Date: 2021-05-25
QINGDAO UNIV
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[0003] Usually, surfactants and polymers are used as stabilizers, but these stabilizers are organic compounds with poor biocompatibility. With the improvement of people's awareness of environmental protection and the concept of green chemistry
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Embodiment 1
[0083] According to the mass ratio of 4:1, weigh chitosan oligosaccharide with a molecular weight of 2000 Da and sodium alginate with a molecular weight of 300,000 Da respectively, and set aside;
[0084] Dissolving the chitosan oligosaccharide in deionized water to obtain a solution A with a concentration of 40% by mass;
[0085] Dissolve the sodium alginate taken in deionized water to obtain a solution B with a mass fraction ratio concentration of 1%;
[0086] Zinc nitrate was added into deionized water for dissolution to obtain a saturated solution C;
[0087] Put solution A in a petri dish, immerse the petri dish in solution B, and carry out interfacial reaction for 30 minutes to obtain a thin film.
[0088] Immerse the film in a saturated zinc nitrate solution for 8 hours, wash it with water, put it into a three-necked flask in a water bath at 98°C, add ammonia water, and perform a hydrothermal reduction reaction for 8 hours to obtain zinc oxide nanoparticles.
[0089] ...
Embodiment 2
[0095] According to the mass ratio of 4:1, weigh chitosan oligosaccharide with a molecular weight of 2000 Da and sodium alginate with a molecular weight of 300,000 Da respectively, and set aside;
[0096] Dissolving the chitosan obtained in deionized water to obtain a solution A with a mass percent concentration of 40%;
[0097] Dissolve the sodium alginate taken in deionized water to obtain a solution B with a mass fraction ratio concentration of 1%;
[0098] Dissolve silver nitrate in deionized water to obtain a solution C with a molar concentration of 0.01M;
[0099] Put solution A in a petri dish, immerse it in solution B, and carry out interfacial reaction for 30 minutes to obtain a thin film.
[0100] The film was immersed in silver nitrate solution for 6 hours, washed with water, put into a three-necked flask, placed in a water bath at 98° C., and subjected to hydrothermal reduction reaction for 8 hours to obtain silver nanoparticles.
[0101] The obtained silver nano...
Embodiment 3
[0106] Repeat the process of Example 1, the difference is: (1) the concentration of the preparation solution A is 50%, (2) the concentration of the preparation solution B is 3%, (3) the interface reaction is carried out for 1h, (4) adopt zinc sulfate to replace nitric acid zinc.
[0107] Likewise, ZnO nanoparticles with different morphologies were obtained on the upper, middle and lower sides of the film.
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Abstract
The invention discloses a one-pot method for preparing nanoparticles with different shapes, in which, the interfacial reaction between polysaccharides and polyelectrolytes is used to obtain a polysaccharide self-supporting film, and then the metal salt is prepared by using the film as a template. Hydrothermal reduction reaction or metathesis reaction to obtain nanoparticles with different morphologies. The preparation method is simple and low in cost, and can simultaneously prepare nanoparticles with different shapes. Moreover, the prepared nanoparticles exhibit many special functions in catalysis, optics, magnetism, mechanics, etc., which make them have important application value in many fields such as ceramics, chemical industry, electronics, optics, biology, and medicine.
Description
technical field [0001] The present invention relates to the preparation of nanoparticles, in particular to the one-pot preparation of nanoparticles with different shapes, in particular, to a one-pot method for the preparation of nanoparticles with different shapes by using the whole polysaccharide self-supporting film as a template. Background technique [0002] In recent years, the preparation technology of nanoparticles has developed rapidly, and various preparation methods such as chemical reagent reduction, illumination, sonoelectrochemical method, and radiation chemical reduction method have appeared. However, due to the high specific surface area and free energy of nanoparticles, it is difficult to prepare In the link, maintaining the stability of nanoparticles in aqueous solution has always been a key issue. [0003] Usually, surfactants and polymers are used as stabilizers, but these stabilizers are organic compounds with poor biocompatibility. With the improvement o...
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