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Preparation method of mercury ion colorimetric sensing cellulose material

A colorimetric sensing and mercury ion technology, applied in the field of preparation of mercury ion sensing materials, can solve problems such as low sensitivity, and achieve the effects of high sensitivity, abundant raw material sources, and mild reaction conditions

Inactive Publication Date: 2010-10-27
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, some materials that can be used for colorimetric sensing of mercury ions in aqueous solution have been successfully synthesized [(a) E.Palomares, R.Vilar and J.R.Durrant, Chem.Commun., 2004, 362. (b) E. Coronado, J.R. Galán-Mascarós, C. Marti-Gastaldo, E. Palomares, J.R. Durrant, R. Vilar, M. Gratzel and M.K. Nazeeruddin, J. Am. Chem. Soc., 2005, 127, 12351. (c) M.K. Nazeeruddin, D.D. Censo, R. Humphry-Baker and M. , Adv.Funct.Mater., 2006, 16, 189], however, due to the limitation of the specific surface area, the sensitivity of this material is low, and it cannot be used to visually detect ppb-level mercury in aqueous solution without the aid of optical instruments ion

Method used

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  • Preparation method of mercury ion colorimetric sensing cellulose material
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  • Preparation method of mercury ion colorimetric sensing cellulose material

Examples

Experimental program
Comparison scheme
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Embodiment 1

[0035] Embodiment 1: Prepare mercury ion colorimetric sensing cellulose material with the method provided by the present invention, and use this material to sense mercury ion in aqueous solution:

[0036] Firstly, the mercury ion colorimetric sensing cellulose material in the present invention is prepared.

[0037] 1) Prepare a 100 mM tetrabutyl titanate solution in a solvent of toluene / ethanol (v:v=1:1), and stir at room temperature for 1 hour.

[0038] 2) Put ordinary quantitative filter paper in a suction filter device, rinse with ethanol for 2 to 3 times, and drain with air flow. Take 10 mL of tetrabutyl titanate solution and add it to the suction filtration device, and let it stand for 3 minutes, so that tetrabutyl titanate is deposited on the filter paper fiber.

[0039] 3) Slowly filter the tetrabutyl titanate solution under low vacuum. When the liquid level of the solution is close to the surface of the filter paper, add ethanol to rinse for 2 to 3 times, and let stan...

Embodiment 2

[0047] Embodiment 2: Prepare mercury ion colorimetric sensing cellulose material with the method provided by the present invention, and use this material to detect other metal ions in aqueous solution:

[0048] Firstly, the mercury ion colorimetric sensing cellulose material in the present invention is prepared.

[0049] According to the preparation method and steps of Example 1, a mercury ion colorimetric sensing cellulose material modified with a monolayer of ruthenium dye N719 molecules was obtained, and it was used for the detection of other metal ions.

[0050] Place the mercury ion colorimetric sensing cellulose material of self-assembled ruthenium dye N719 molecular monolayer in 1mM aqueous solution of different metal ions (copper nitrate, magnesium nitrate, lead nitrate, zinc nitrate) for 10 minutes, take it out and wash it with water to remove Physically adsorbed metal ions, dry at room temperature. It can be found that even when the concentration of other metal ions...

Embodiment 3

[0051] Embodiment 3: Prepare mercury ion colorimetric sensing cellulose material with the method provided by the present invention, and detect the recycling property of the material:

[0052] Firstly, the mercury ion colorimetric sensing cellulose material in the present invention is prepared.

[0053] According to the preparation method and steps of Example 1, a mercury ion colorimetric sensing cellulose material modified with a molecular monolayer of ruthenium dye N719 was obtained, and it was used for the research on the recycling properties.

[0054] The mercury ion colorimetric sensing cellulose material of the self-assembled ruthenium dye N719 molecular monolayer is placed in a 50 μM mercury nitrate aqueous solution, taken out, washed with water to remove physically adsorbed mercury ions, and dried at room temperature. As seen in Example 1, after interacting with mercury ions, the mercury ion colorimetric sensing cellulose material changes from initial purple to yellow; ...

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Abstract

The invention discloses a preparation method of a mercury ion colorimetric sensing cellulose material, which comprises the following steps: taking a natural cellulose fiber material as a matrix, taking tetrabutyl titanate as a precursor and depositing a titanium dioxide film on the surface of a filter paper fiber by using a surface sol-gel method; then self-assembling and introducing a ruthenium dye N719 ligand molecule monolayer sensitive to mercury ions to obtain the mercury ion colorimetric sensing cellulose material; and detecting the mercury ions in the solution by simply infiltrating the material prepared by the invention in water solution of the mercury ions for a certain time and observing the change of the solution. In addition, the material prepared by the invention can also realize the recycling after treated by potassium iodide solution. The mercury ion colorimetric sensing cellulose material has excellent sensitivity and selectivity on the mercury ions and has the advantages of abundant sources of raw materials, low price, simple preparation method and capability of realizing simple, quick and economic detection on the mercury ions.

Description

technical field [0001] The invention relates to a preparation method of a mercury ion sensing material, in particular to a preparation method of a surface-modified cellulose material having a colorimetric sensing effect on mercury ions. Background technique [0002] Because mercury ions are not suitable for decomposition and bioaccumulation, they will cause great harm to the environment and human health. Once ingested, it will damage the nervous system and endocrine system of the human body. Therefore, research and development can be selectively transmitted. Materials sensitive to mercury ions in aqueous solutions are particularly important. In recent years, there have been reports on the selective sensing of mercury ions by functionalizing the surface of mesoporous materials, oligonucleotides, polymers, metal nanoparticles, and semiconductor quantum dots. It is not high or cannot be applied to the water environment system, so it is difficult to popularize and use. Optical...

Claims

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Application Information

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IPC IPC(8): D06M11/46D06M13/503G01N21/78D06M101/06
Inventor 黄建国张学海
Owner ZHEJIANG UNIV
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