A kind of lead ion fluorescent sensing material, preparation method and use method

A technology of fluorescent sensing and fluorescent sensing membrane, applied in the field of chemistry, can solve the problem that the detection is easily interfered by other inorganic ions

Active Publication Date: 2020-10-27
XIANYANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, spectrophotometers are mainly used to detect lead ions, but they are easily interfered by other inorganic ions, such as Cu 2+ and Al 3+ Wait

Method used

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  • A kind of lead ion fluorescent sensing material, preparation method and use method
  • A kind of lead ion fluorescent sensing material, preparation method and use method
  • A kind of lead ion fluorescent sensing material, preparation method and use method

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0059] The preparation process of the lead ion fluorescent sensing material mainly includes the following steps:

[0060] Step A: chitosan is added in the acetic acid solution, and the acetic acid solution is stirred, so that the chitosan is dissolved in the acetic acid solution to obtain the chitosan acetic acid solution;

[0061] Step B: Prepare 0.2×10 -4 ~2.0×10 -4 mol / L CdSe solution, and the prepared CdSe solution is added to the chitosan acetic acid solution prepared in step A, and by magnetic stirring and ultrasonic treatment, CdSe is dissolved and dispersed uniformly in the chitosan acetic acid solution to obtain a shell containing The first mixed solution of polysaccharide and cadmium selenide;

[0062] Step C: Prepare 0.2×10 -4 ~2.0×10 -4 mol / L of nitric acid barrier solution, and the prepared nitric acid barrier solution is added in the first mixed solution prepared in step B, and by magnetic stirring, the nitric acid barrier is dissolved and dispersed evenly in...

Embodiment 1

[0073] Step O: Put a glass substrate of a certain size into the chromic acid washing solution and soak for one day. Then wash repeatedly with distilled water, then ultrasonically treat for 30min, then fully wash with twice distilled water, put it in a 50°C oven to dry it, after the glass substrate is dried, raise the oven temperature to 110°C, and dry the glass substrate After 2 hours of activation treatment, it is ready for use.

[0074] Step A1: Prepare 500 mL of acetic acid solution with a mass fraction of 2%, measure 100 mL of the above acetic acid solution, add 1 g of chitosan, and magnetically stir for about two hours to completely dissolve it to obtain chitosan acetic acid solution.

[0075] Step B1: Weigh 0.05mL of CdSe solution, add it into chitosan-acetic acid solution, stir it with magnetic force to make it dissolve completely, and then conduct ultrasound for about 30min to make it dissolve more fully, and obtain a CS / CdSe solution. Among them, the CdSe solution wa...

Embodiment 2

[0084] Embodiment 2: Determination of the characteristic sensing substance of the lead ion fluorescent sensing film

[0085] By measuring the fluorescence intensity of the solutions of different inorganic ions, wherein the products obtained in Example 1 are soaked in the solutions of each inorganic ions, the characteristic sensing ions of the products are determined, and the specific steps during the measurement are as follows:

[0086] Step A2: the preparation concentration is the zinc chloride (ZnCl 2 ), cadmium nitrate (Cd(NO 3 ) 2 ), copper sulfate (CuSO 4 ), ammonium chloride (NH 4 Cl), potassium iodide (KI), potassium nitrate (KNO 3 ), mercury chloride (HgCl 2 ), magnesium sulfate (MgSO 4 ), chromium nitrate (Cr(NO 3 ) 3 ), manganese sulfate (MnSO 4 ), lead nitrate (PbNO 3 ), sodium nitrate (NaNO 3 ) and aluminum nitrate (Al(NO 3 ) 3 ) solution.

[0087] Step B2: Place the product obtained in Example 1 in a 1cm quartz cuvette, add 2.5 g of distilled water (fo...

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Abstract

The invention provides a lead ion fluorescence sensing material as well as a preparation method and a use method thereof. The lead ion fluorescence sensing material is formed by chitosan and cadmium nanometer ions through chelation; the lead ion fluorescence sensing material has a general structure formula shown in the description. A series of experiment results show that the lead ion fluorescencesensing material provided by the invention has the feature sensing performance on lead ions, and is hopeful to become the powerful tool for detecting the lead ions.

Description

technical field [0001] The invention relates to the field of chemical technology, in particular to a lead ion fluorescent sensing material, a preparation method and a use method. Background technique [0002] Lead is a toxic heavy metal that can enter the human body through inhalation, skin absorption or ingestion, causing acute or chronic poisoning of the human body and damage to the brain and nervous system. In addition, lead is difficult to degrade naturally in the environment, and lead is discharged into the environment, which easily pollutes groundwater or soil. Due to the toxicity of lead, the safety of lead use has attracted widespread attention. Therefore, establishing a detection method for lead is an important way to achieve effective control, management and early warning of lead. [0003] At present, spectrophotometers are mainly used to detect lead ions, but they are easily interfered by other inorganic ions, such as Cu 2+ and Al 3+ Wait. Therefore, it is ver...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07F3/08C08B37/08C09K11/06G01N21/64
CPCC07F3/003C08B37/003C09K11/06C09K2211/188G01N21/643
Inventor 王珊
Owner XIANYANG NORMAL UNIV
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