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Preparation and application of CdS-PAMAM nanocomposite in detecting Cu2+

A technology of nano-composite materials and methanol solution, which is applied in the field of ion detection and composite materials, and can solve problems such as expensive experimental equipment and complicated operation

Active Publication Date: 2016-07-20
LANZHOU UNIV OF ARTS & SCI
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Problems solved by technology

Commonly used methods for detecting copper ions include atomic emission spectrometry, atomic absorption spectrometry, electrochemical methods and inductively coupled plasma mass spectrometry (ICP-MS) etc. Realize rapid detection in the field

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  • Preparation and application of CdS-PAMAM nanocomposite in detecting Cu2+
  • Preparation and application of CdS-PAMAM nanocomposite in detecting Cu2+
  • Preparation and application of CdS-PAMAM nanocomposite in detecting Cu2+

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Embodiment Construction

[0037] The preparation of the CdS / PAMAM nanocomposite material of the present invention and its application in the detection of copper ions will be further described below through specific examples.

[0038] 1. Preparation of CdS / PAMAM dendritic nanocomposites

[0039] (1) Weigh 0.5860g of chromium nitrate, dilute it to 250mL with methanol as solvent, and prepare a methanol solution of chromium nitrate (0.009932mol / L);

[0040] (2) Weigh 0.2480g of sodium sulfide nonahydrate, use methanol as solvent to make it volume up to 100mL, and make methanol solution of sodium sulfide (0.01033mol / L);

[0041] (3) Take 100mL of 0.0004mol / L4.0GPAMAM and 20mL (0.009932mol / L) methanol solution of chromium nitrate, stir for 10h under the protection of nitrogen, then add 10mL (0.01022mol / L) methanol solution of sodium sulfide, under nitrogen protection Stir rapidly for 1 hour to obtain a light yellow clear transparent liquid, namely the CdS / PAMAM dendritic nanocomposite.

[0042] 2. Applicat...

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Abstract

The invention discloses preparation and application of a CdS-PAMAM nanocomposite in detecting Cu2+, and belongs to the technical field of composites and ion detection.A polyamidoamine (PAMAM) dendrimer is used as a template, CdS is used a light emitting center (chromic nitrate and sodium sulfide are ion sources for synthesizing CdS), and the molecule CdS-PAMAM nanocomposite of a tree structure is synthesized in situ.According to selective testing of the CdS-PAMAM nanocomposite for metal ions, the result proves that the only the addition of copper ions has the remarkable effect on the fluorescence intensity of the composite (fluorescence of the composite is quenched and reduced from 1678 to 957), and the addition of other metal ions will not greatly change fluorescence of the composite.Accordingly, the CdS-PAMAM nanocomposite can be used for copper ions in the specific selectivity fluorescence detection environment.

Description

technical field [0001] The present invention relates to the preparation of a kind of CdS / PAMAM nano-composite material, and the present invention also relates to CdS / PAMAM nano-composite material in detecting Cu simultaneously 2+ The application in the invention belongs to the technical field of composite materials and the technical field of ion detection. Background technique [0002] Copper is an essential trace element for the growth of animals and plants, and plays a very important role in the life process of organisms. However, excessive copper will not only bring toxicity to the growth of animals and plants, but also accumulate in the environment, enrich in the food chain, and eventually endanger human health. Therefore, the detection of copper ions has become an important indicator in environmental monitoring. Commonly used methods for detecting copper ions include atomic emission spectrometry, atomic absorption spectrometry, electrochemical methods and inductively ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06C09K11/56G01N21/64
CPCC09K11/06C09K11/565C09K2211/14G01N21/6428
Inventor 来守军关晓琳张东海靳其军孟丽景新颖常张博
Owner LANZHOU UNIV OF ARTS & SCI
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