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Cerium dioxide composite nanomaterial as well as preparation method and application thereof

A technology of composite nanomaterials and ceria, which is applied in the field of ceria composite nanomaterials and its preparation, can solve the problems of easy deactivation of catalytic ability, and achieve the effects of excellent enzymatic activity, good catalytic activity and mild reaction conditions

Active Publication Date: 2019-04-05
INST OF HIGH ENERGY PHYSICS CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the study also found that only ceria with a particle size of less than 5 nanometers has excellent SOD mimetic activity, and the catalytic ability of nano-ceria with a particle size of more than 5 nanometers is easily inactivated.

Method used

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  • Cerium dioxide composite nanomaterial as well as preparation method and application thereof
  • Cerium dioxide composite nanomaterial as well as preparation method and application thereof
  • Cerium dioxide composite nanomaterial as well as preparation method and application thereof

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Embodiment

[0033] 1. Preparation of Cerous Hydroxide Solution

[0034] Hexamethylenetetramine (HMT) and Ce(NO 3 ) 3 ·6H 2 After each O was dissolved in water, 160 mL of HMT solution with a concentration of 0.5M and 160 mL of Ce(NO with a concentration of 0.0375M 3 ) 3 solution, then Ce(NO 3 ) 3 The solution was added to the HMT solution at 75 °C. After stirring vigorously at 75°C for several minutes, a light purple-red transparent solution was obtained, that is, a cerium hydroxide solution was obtained.

[0035] 2. Preparation of N719 ruthenium dye-ceria composite nanomaterials

[0036] When the aforementioned light purple-red transparent solution is formed, immediately add 35 mg of N719 ruthenium dye to it at 75°C and stir in the dark to obtain a dark red suspension. After stirring for another 3 hours at 75°C, cool in air to After standing at room temperature for 5 hours, a dark red composite nanomaterial was obtained. Discard the supernatant, centrifuge at 10,000 rpm, and wash...

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Abstract

The invention provides a cerium dioxide composite nanomaterial. The cerium dioxide composite nanomaterial is prepared from nano cerium dioxide and carboxylic acid bipyridine ruthenium dye, wherein theruthenium dye is bonded to the surface of the nano cerium dioxide by means of a carboxyl group. The invention further provides a preparation method and application of the composite nanomaterial. According to the composite nanomaterial provided by the invention, the surface of the cerium dioxide is coated with the carboxylic acid bipyridine ruthenium dye in a bonding way; the binding force of thecerium dioxide and the carboxylic acid bipyridine ruthenium dye is better, so that the structure of the composite material is more stable, and the morphology of the nano cerium dioxide is also not changed; and the cerium dioxide composite nanomaterial has excellent superoxide dismutase (SOD) simulating activity, thus being used as an SOD simulant with a great application potential. The preparationmethod provided by the invention has the advantages of being simple to operate, mild in reaction conditions, low in cost, high in repeatability, and the like.

Description

technical field [0001] The invention relates to the field of nanomaterials and their preparation, in particular to a ceria composite nanomaterial, its preparation method and application. Background technique [0002] It has been found that a variety of nanomaterials have catalytic activity and can be used as nanoartificial enzymes. Many metal oxide nanomaterials have been developed to simulate the activities of various natural enzymes and can be used as potential natural enzyme mimics to exert catalytic activity. Therefore, it has potential application value in the field of biomedicine. [0003] Free radicals in the human body are divided into oxygen free radicals and non-oxygen free radicals, of which oxygen free radicals account for the vast majority of free radicals. The biological activity of free radicals in the body has duality. The generation and removal of free radicals in the body should be balanced, so that the body can maintain health. If there are too many free...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61K33/244A61K47/54A61P39/06
CPCA61K33/24A61K47/545A61P39/06
Inventor 何潇李媛媛王国华张智勇
Owner INST OF HIGH ENERGY PHYSICS CHINESE ACADEMY OF SCI
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