Method for preparing anionic colorimetric sensing cellulosic material

A colorimetric sensing, cellulose technology, applied in fiber processing, plant fiber, analysis by chemical reaction of materials, etc. Simple, Inexpensive Effects

Inactive Publication Date: 2010-10-27
ZHEJIANG UNIV
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Problems solved by technology

Although, there have been some related reports on anion colorimetric sensing in recent years [(a) Vázquez, M.; Fabbrizzi, L.; Taglietti, A.; Pedrido, R.M.; González-Noya, A.M.; Bermejo, M.R. Angew .Chem.Int.Ed.2004, 43, 1962-1965.(b) Jose, D.A.; Kumar, D.K.; Ganguly, B.; Das, A.Org.Lett.2004, 6, 3445-3448], but because It cannot be used in aqueous solution systems, or has a large dependence on the pH of the solution, making

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  • Method for preparing anionic colorimetric sensing cellulosic material
  • Method for preparing anionic colorimetric sensing cellulosic material
  • Method for preparing anionic colorimetric sensing cellulosic material

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[0031] Example 1: Using the method provided by the present invention to prepare anionic colorimetric sensing cellulose material, and using the material to sense fluoride ions in an aqueous solution:

[0032] First, the anion colorimetric sensor cellulose material of the present invention is prepared.

[0033] 1) Prepare a 100 mM tetrabutyl titanate solution, the solvent is toluene / ethanol (v:v=1:1), and stir at room temperature for 1 hour.

[0034] 2) Put the ordinary quantitative filter paper in the suction filter device, rinse it with ethanol 2 to 3 times, and drain it with air flow. Take 10 mL of the tetrabutyl titanate solution and add it to the suction filtration device and let it stand for 3 minutes to deposit the tetrabutyl titanate on the filter paper fibers.

[0035] 3) Slowly filter the tetrabutyl titanate solution with low vacuum. When the liquid surface of the solution is close to the surface of the filter paper, add ethanol to rinse for 2 to 3 times, and let it stand for ...

Example Embodiment

[0043] Example 2: Using the method provided by the present invention to prepare an anion colorimetric sensing cellulose material, and use the material to detect other anions in an aqueous solution:

[0044] First, the anion colorimetric sensor cellulose material of the present invention is prepared.

[0045] According to the preparation method and steps of Example 1, the anion colorimetric sensing cellulose material modified by the AC molecule monolayer of the alizarin complexing agent was obtained and used for the detection of other anions.

[0046] Place the self-assembled alizarin complexing agent AC molecule monolayer anion colorimetric sensing cellulose material in 1 mM aqueous solution of different anions (chloride ion, bromide ion, acetate ion, carbonate ion) for 5 minutes, and then take it out Wash with water to remove physically adsorbed anions, and dry at room temperature. It can be found that even when the concentration of other anions is as high as 1 mM, it still does no...

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Abstract

The invention discloses a method for preparing an anionic colorimetric sensing cellulosic material. A titanium dioxide film is deposited on the surface of filter paper cellulose by taking natural cellulose fiber material as a matrix, and taking tetrabutyl titanate as a precursor by a surface sol-gel process; a fluoride ion colorimetric sensing cellulosic material is obtained by introducing a fluoride ion-sensitive ligand alizarin complexant molecule single layer in a self-assembly way; and fluoride ions in solution can be detected by infiltrating the material prepared by the invention in the aqueous solution of anions for a certain period of time simply, and observing the color change of the material. The anionic colorimetric sensing cellulosic material prepared by the invention has the advantages of high sensitivity and selectivity to the fluoride ions, abundant material sources, low cost, simple preparation method and simple, rapid and economic fluoride oil detection.

Description

technical field [0001] The invention relates to a preparation method of an anion colorimetric sensing cellulose material, in particular to a preparation method of a surface-modified cellulose material having a colorimetric sensing effect on fluoride ions. Background technique [0002] Anions have very important applications in fields such as environmental chemistry and food science, therefore, there is increasing interest in the selective recognition and sensing of anions. Among the many anions, fluoride ion has received special attention due to its significant role in dental health care, osteoporosis treatment and other fields. However, excessive intake of fluoride ions will cause fluorosis, which is mainly manifested clinically as changes in bone density. Therefore, the detection and sensing of fluoride ions is very important. At present, many chemical methods have been used for anion sensing, mainly including colorimetric methods, fluorescence methods, electrochemical me...

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Application Information

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IPC IPC(8): D06M11/46D06M13/328G01N21/78D06M101/06
Inventor 黄建国张学海
Owner ZHEJIANG UNIV
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