Preparation method of layered nano hollow microsphere NiSiO coated NiAlFe adsorbent loaded with LDHs and application threof

A technology of hollow microspheres and adsorbents, applied in chemical instruments and methods, other chemical processes, nuclear engineering, etc., can solve the problems of high operating cost and low adsorption capacity, and achieve improved adsorption effect, high removal rate, and easy solution agglomerative effect

Active Publication Date: 2020-09-15
EAST CHINA JIAOTONG UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the above-mentioned problems of low adsorption capacity or high operating cost of the existing functional materials, the purpose of the present invention is to disclose a preparation method of a layered nano-hollow microsphere NiSiO@NiAlFe adsorbent loaded with LDHs

Method used

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  • Preparation method of layered nano hollow microsphere NiSiO coated NiAlFe adsorbent loaded with LDHs and application threof
  • Preparation method of layered nano hollow microsphere NiSiO coated NiAlFe adsorbent loaded with LDHs and application threof
  • Preparation method of layered nano hollow microsphere NiSiO coated NiAlFe adsorbent loaded with LDHs and application threof

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Embodiment 1

[0025] A method for preparing a layered nano-hollow microsphere NiSiO@NiAlFe adsorbent loaded with LDHs, comprising the following steps:

[0026] a) Template SiO 2 preparation of

[0027] 9 mL of ethyl orthosilicate, 4 mL of deionized water, and 100 mL of ammonia water were sequentially added to 100 mL of absolute ethanol, followed by stirring at room temperature for 5 h. After the mixed solution was centrifuged for 5 minutes, the obtained solid was washed three times with ultrapure water, dried at 60° C. for 12 hours, ground and passed through a 200-mesh sieve to obtain white nano-spherical silica powder.

[0028] b) Preparation of NiSiO hollow spheres

[0029] 0.4g SiO 2 Disperse in 80mL of water and sonicate for 10min to form suspension A. 5.4mmol Ni(NO 3 ) 2 ·6H 2 O, 20 mmol NH 4 Dissolve Cl in 80mL ultrapure water and stir for about 15min, then slowly add 4mL NH 3 ·H 2 O, forming solution B. Solution B was added dropwise to suspension A to form a mixed solution...

Embodiment 2

[0033] A method for preparing a layered nano-hollow microsphere NiSiO@NiAlFe adsorbent loaded with LDHs, comprising the following steps:

[0034] a) Template SiO 2 preparation of

[0035] 9 mL of ethyl orthosilicate, 4 mL of deionized water, and 100 mL of ammonia water were sequentially added to 100 mL of absolute ethanol, followed by stirring at room temperature for 5 h. After the mixed solution was centrifuged for 5 minutes, the obtained solid was washed three times with ultrapure water, dried at 60° C. for 12 hours, ground and passed through a 200-mesh sieve to obtain white nano-spherical silica powder.

[0036] b) Preparation of NiSiO hollow spheres

[0037] 0.4g SiO 2 Disperse in 80mL of water and sonicate for 10min to form suspension A. 5.4mmol Ni(NO 3 ) 2 ·6H 2 O, 20 mmol NH 4 Dissolve Cl in 80mL ultrapure water and stir for about 15min, then slowly add 4mL NH 3 ·H 2 O, forming solution B. Solution B was added dropwise to suspension A to form a mixed solution...

Embodiment 3

[0041] A method for preparing a layered nano-hollow microsphere NiSiO@NiAlFe adsorbent loaded with LDHs, comprising the following steps:

[0042] a) Template SiO 2 preparation of

[0043] 9 mL of ethyl orthosilicate, 4 mL of deionized water, and 100 mL of ammonia water were sequentially added to 100 mL of absolute ethanol, followed by stirring at room temperature for 5 h. After the mixture was centrifuged for 5 minutes, the obtained solid was washed 3 times with ultrapure water, dried at 60°C for 12 hours, ground and passed through a 200-mesh sieve to obtain white nano-spherical SiO 2 Powder.

[0044] b) Preparation of NiSiO hollow spheres

[0045] 0.4g SiO 2 Disperse in 80mL of water and sonicate for 10min to form suspension A. 5.4mmol Ni(NO 3 ) 2 ·6H 2 O, 20 mmol NH 4 Dissolve Cl in 80mL ultrapure water and stir for about 15min, then slowly add 4mL NH 3 ·H 2 O, forming solution B. Solution B was added dropwise to suspension A to form a mixed solution. Finally, t...

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Abstract

The invention belongs to the technical field of composite materials, and relates to an LDHs adsorbent, in particular to a preparation method of layered nano hollow microsphere NiSiO-coated NiAlFe adsorbent loaded with LDHs. The preparation method comprises the following steps: preparing a template SiO2; preparation of NiSiO hollow spheres, dispersing NiSiO hollow spheres, Ni(NO3)2.6 H2O, Al(NO3)3.9 H2O, Fe(NO3)3.9 H2O and urea into water to form a mixed suspension; transferring to a high-pressure kettle, carrying out a hydrothermal reaction at 120-140 DEG C for 12-16 hours, naturally cooling to room temperature, respectively washing sediments with ethanol and ultrapure water for three times, drying at 60-80 DEG C for 8-12 hours, and grinding into powder, thereby obtaining the product. Theprepared adsorbent is applied to adsorption of radionuclide. According to the method, NiAlFe-LDHs are grafted to the NiSiO hollow microspheres, and Cs<+> in water can be rapidly and efficiently removed. The experimental simulation shows that when 50 mg of the prepared adsorbent is added for reaction for 20 min, the removal rate of Cs<+> can reach 89.73%, and reliable theoretical and practical support is provided for practical application.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and relates to a layered composite metal hydroxide (Layered Double Hydroxides, LDHs) adsorbent, in particular to a preparation method of a layered nano-hollow microsphere NiSiO@NiAlFe adsorbent loaded with LDHs and its effect on Application of radionuclides. Background technique [0002] In recent years, with the rapid development of nuclear technology, a large amount of radioactive substances have been discharged into water bodies, causing serious water pollution. Most radioactive nuclear elements have long half-lives and high toxicity. Once they enter the human body, they will cause cancer and mutations in the cells, tissues and genetic material of the human body. In the past few decades, technologies such as photocatalysis, adsorption, extraction, reverse osmosis, and biodegradation have been applied to remove radionuclear elements in water. However, most of these methods have li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/06B01J20/28B01J20/30G21F9/12
CPCB01J20/06B01J20/28021B01J20/28007B01J20/28002G21F9/12
Inventor 胡玉瑛潘成彭小明胡锋平戴红玲郑晓环刘苏苏
Owner EAST CHINA JIAOTONG UNIVERSITY
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