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Octadecyl modified foam nickel adsorbent and application thereof

A technology of octadecyl and nickel foam, applied in other chemical processes, preparation of test samples, alkali metal oxides/hydroxides, etc., to achieve good stability, fast separation process, and good adsorption effect

Inactive Publication Date: 2017-06-20
JIANGXI UNIVERSITY OF TRADITIONAL CHINESE MEDICINE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

haven't seen C yet 18 Functionalized nickel foam (NF-C 18 ) for the detection of 16 kinds of PAHs in water

Method used

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  • Octadecyl modified foam nickel adsorbent and application thereof
  • Octadecyl modified foam nickel adsorbent and application thereof
  • Octadecyl modified foam nickel adsorbent and application thereof

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preparation example Construction

[0040] The preparation method of octadecyl-modified nickel foam adsorbent includes the following steps:

[0041] 1) Cut the foamed nickel into 1×1cm with scissors 2 In flakes, soak in acetone for 20 minutes to remove dirt, then wash with 2M HCl solution, ultrasonically treat for 30 minutes to remove the NiO layer on the surface, and finally wash with deionized water and ethanol, and dry to obtain pretreated foamed nickel for use;

[0042] 2) Take 400 mg of pretreated nickel foam (10 pieces of NF), disperse it in a mixture of 100 mL of isopropanol and 8 mL of ultrapure water, sonicate for 15 minutes, then add 10 mL of ammonia and 8 mL of TEOS, and stir for 12 hours at 45°C. The prepared product was washed with water and ethanol, and dried in vacuum at 60°C for 12 hours. In this way, a layer of porous silica gel was wrapped around the pretreated nickel foam to obtain silicon-coated nickel foam (ie NF-SiO 2 );

[0043] 3) Put the silicon-coated nickel foam (NF-SiO 2 ) And C 18 -The isoc...

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Abstract

The invention discloses an octadecyl modified foam nickel adsorbent and application thereof. The octadecyl modified foam nickel adsorbent is prepared by the following steps: after pre-treating foam nickel, dispersing the foam nickel into a mixture of isopropyl alcohol and ultrapure water and carrying out ultrasonic treatment; adding ammonia water and TEOS (Tetraethyl Orthosilicate) in sequence; stirring at 45 DEG C for 12h; washing and drying to obtain silicon coated foam nickel; under the protection of argon gas, adding anhydrous toluene, dried C18-isocynate, triethylamine and the dried silicon coated foam nickel in sequence; reflowing a mixture at 80 DEG C for 24h under magnetic stirring; naturally cooling to room temperature; washing and drying to obtain the octadecyl modified foam nickel adsorbent. The octadecyl modified foam nickel adsorbent disclosed by the invention can be used for carrying out solid phase extraction on 16 types of PAHs (Polycyclic Aromatic Hydrocarbons). The adsorbent has a relatively good adsorption effect and can be rapidly separated from a matrix, has relatively good stability; the adsorbent can be rapidly extracted, can be repeatedly utilized for a plurality of times and is a sensitive, effective, convenient and reliable adsorption material for trace analysis of the PAHs.

Description

Technical field [0001] The invention relates to a solid phase extraction adsorbent, in particular to an octadecyl modified foamed nickel adsorbent and its application. Background technique [0002] Polycyclic aromatic hydrocarbons (PAHs) are composed of a large group of hydrocarbons containing 2 or more fused rings. They are a kind of widespread environmental pollutants, which are produced by incomplete combustion of natural and man-made organic materials. PAHs are toxic substances that are difficult to degrade. A large number of epidemiological studies have shown that people exposed to PAHs are at risk of cancer. For this reason, PAHs are listed as priority pollutants by the U.S. Environmental Protection Agency (U.S.EPA) and the European Environment Agency (EEA). Therefore, in order to protect human health and environmental safety, more and more studies have focused on the determination of PAHs in environmental water samples. PAHs have strong hydrophobicity and volatility, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/28B01J20/30G01N1/28
CPCB01J20/22B01J20/02B01J20/103B01J20/28014B01J2220/46B01J2220/4806B01J2220/4812G01N1/28
Inventor 严志宏朱根华熊耀坤周立分蔡瑛
Owner JIANGXI UNIVERSITY OF TRADITIONAL CHINESE MEDICINE
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