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Metal organic gel, preparation method thereof and method for visually detecting Al3<+> by metal organic gel

A metal-organic, detection method technology, applied in the field of chemical analysis and detection, can solve the problems of large interference, expensive instruments, complicated pretreatment, etc., and achieve the effects of reducing response time, increasing specific surface area, and simple detection operation.

Active Publication Date: 2019-04-05
HAINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These techniques have high sensitivity and selectivity and are often used in ion quantitative detection, but these methods are expensive, the sample pretreatment is more complicated during the measurement, the detection is not fast enough, and the interference is large, so the application is limited.

Method used

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  • Metal organic gel, preparation method thereof and method for visually detecting Al3&lt;+&gt; by metal organic gel
  • Metal organic gel, preparation method thereof and method for visually detecting Al3&lt;+&gt; by metal organic gel
  • Metal organic gel, preparation method thereof and method for visually detecting Al3&lt;+&gt; by metal organic gel

Examples

Experimental program
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Effect test

Embodiment 1

[0038] A kind of preparation method of metal organogel, comprises the steps: at first getting 1mL concentration is the DMF solution of 1,3,6,8-tetrakis(4-carboxyphenyl)pyrene of 0.01mmol / mL, 1mL concentration is 0.1mmol / mL The DMF solution of 4-4 bipyridine in mL and the DMF solution of 0.2mL nickel nitrate hexahydrate with a concentration of 0.01mmol / mL are fully mixed to obtain a DMF mixed solution; the above DMF mixed solution is poured into a glass bottle and sealed and placed in an oven Heating the reaction, the reaction time is 10 h, and the reaction temperature is 90° C. to obtain a gel; the gel is vacuum-dried at 60° C. for 20 h to obtain a metal organic gel.

[0039] a trivalent Al 3+ A visual detection method, including the following steps:

[0040] (1) Preparation of metal-organic gel composite film: Take 20 mg of metal-organic gel prepared above, 130 mg of polyethylene glycol, 2 g of polyvinyl alcohol, and 18 mL of water and stir evenly at 85 ° C to obtain viscous...

Embodiment 2

[0043] A kind of preparation method of metal organogel, comprises the steps: at first getting 2mL concentration is the DMF solution of 1,3,6,8-tetrakis(4-carboxyphenyl)pyrene of 0.02mmol / mL, 2mL concentration is 0.2mmol / mL The DMF solution of 4-4 bipyridine in mL and 0.3mL NiDMF solution of hexahydrate nitric acid with a concentration of 0.02mmol / mL are fully mixed to obtain a DMF mixed solution; the above DMF mixed solution is poured into a glass bottle, sealed and placed in an oven for heating reaction , the reaction time was 14 hours, and the reaction temperature was 95° C. to obtain a gel; the gel was vacuum-dried at 60° C. for 25 hours to obtain a metal-organic gel.

[0044] a trivalent Al 3+ A visual detection method, including the following steps:

[0045] (1) Preparation of metal-organic gel composite film: take 40 mg of metal-organic gel prepared above, 180 mg of polyethylene glycol, 5 g of polyvinyl alcohol, and 28 mL of water and stir evenly at 85 ° C to obtain vis...

Embodiment 3

[0048] A kind of preparation method of metal organogel, comprises the steps: at first getting 3mL concentration is the DMF solution of 1,3,6,8-tetrakis(4-carboxyphenyl)pyrene of 0.03mmol / mL, 3mL concentration is 0.3mmol / mL The DMF solution of 4-4 bipyridine in mL and the NiDMF solution of nitric acid hexahydrate with a concentration of 0.03mmol / mL are fully mixed to obtain a DMF mixed solution; the above-mentioned DMF mixed solution is poured into a glass bottle, sealed and placed in an oven for heating reaction , the reaction time was 16 hours, and the reaction temperature was 100° C. to obtain a gel; the gel was vacuum-dried at 60° C. for 30 hours to obtain a metal-organic gel.

[0049] a trivalent Al 3+ A visual detection method, including the following steps:

[0050] (1) Preparation of metal-organic gel composite film: take 30 mg of metal-organic gel prepared above, 150 mg of polyethylene glycol, 3 g of polyvinyl alcohol, and 22 mL of water and stir evenly at 85 ° C to o...

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Abstract

The invention relates to metal organic gel, a preparation method thereof and a method for visually detecting Al3<+> by the metal organic gel. The preparation method includes the steps: firstly, synthesizing the metal organic gel by a sol-gel method; secondly, combining the synthesized metal organic gel with macromolecules to prepare a macromolecule composite membrane. The macromolecule composite membrane has good fluorescent response to Al3<+>, change of fluorescence colors can be identified by naked eyes, Al3<+> with high concentration can be detected, and the composite membrane has excellentanti-interference capability and can be recycled. The method has the advantages that the method for detecting Al3<+> is simple in operation step, and observation with naked eyes can be achieved.

Description

technical field [0001] The invention belongs to the field of chemical analysis and detection, and in particular relates to a metal organic gel and a preparation method thereof and the use of the metal organic gel for Al 3+ Visual detection method. Background technique [0002] Aluminum is the most abundant metal element in the earth's crust, accounting for about 7.73% of the total amount of the earth's crust, second only to oxygen and silicon. Most of the aluminum in the soil exists in the form of fixed aluminum, which has no toxic effect on plants and the environment, and only ionic aluminum can affect it. In recent years, with the deteriorating environment and the frequent precipitation of acid rain, the acidification of soil has intensified, leading to the activation of aluminum in soil. The harm of aluminum has become the main factor limiting the growth of crops in acidic soil. It seriously restricts the growth of plants, causing large-scale degradation of forests and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/00G01N21/64C07F15/04
CPCB01J13/0065B01J13/0069C07F15/045G01N21/643
Inventor 杨玮婷谷东旭潘勤鹤任国建王芙香
Owner HAINAN UNIVERSITY
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