A kind of nanometer chromogenic probe based on cds nanoparticle and its preparation method and application

A nanoparticle and nanotechnology, applied in the field of CdS nanoparticle-based nanochromogenic probe and its preparation, can solve the problem that heavy metal ions cannot be processed, and achieve good detection selectivity

Active Publication Date: 2016-12-07
NANJING XIAOZHUANG UNIV
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  • Description
  • Claims
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Problems solved by technology

Some methods have been successfully applied commercially, and these methods have good sensitivity, precision, accuracy, and selectivity, but the online monitoring of heavy metal ions in large-scale national production and life cannot be carried out. With the vigorous development of medicine, food and environmental engineering, it is of great significance to seek a fast, economical and convenient analysis method to realize the sensitive detection of heavy metal ions

Method used

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  • A kind of nanometer chromogenic probe based on cds nanoparticle and its preparation method and application
  • A kind of nanometer chromogenic probe based on cds nanoparticle and its preparation method and application
  • A kind of nanometer chromogenic probe based on cds nanoparticle and its preparation method and application

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Embodiment 1

[0037] 1. Synthesis of nanochromogenic probes

[0038] 0.02 mol·L -1 cadmium nitrate solution 30 mL, add 1.5 mL 0.02 mol·L -1 Add 120 μL of thioglycolic acid, adjust the pH to 9 with sodium hydroxide, put in an oil bath at 70°C for 30 minutes, and then add 30 mL of freshly prepared 0.08 mol L to the reaction system -1 Sodium sulfide solution, continue to react at 70°C for 3h, and cool to room temperature naturally. The precursor solution of the nanochromogenic probe is obtained.

[0039] The precursor solution was centrifuged at 8000r / min, and the supernatant was taken and marked as the supernatant stock solution, which was the colloidal solution of the nanochromogenic probe. Add a large amount of acetone to the supernatant stock solution, and centrifuge to precipitate the pure nano-chromogenic probe.

[0040] 2. Copper ion color experiment

[0041] Take 2mL of the prepared nano-chromogenic probe and put it into a colorimetric bottle, add 3mL of deionized water, add diffe...

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Abstract

The invention discloses a CdS nanoparticle-based nano developing probe as well as a preparation method and an application thereof. The nano developing probe is of a core-shell structure; the core consists of CdS nanoparticles; and the shell consists of cobalt-polysulfide complex. The developing probe is capable of rapidly and sensitively making developing response on copper ions, the response time is shorter than 30 seconds, the naked eye developing linear range is 5-5mM, and the detection limit is 1mM. The nano probe is good in detection selectivity on detection of copper ions, and the existence of co-existing metal ions has no interfere to the detection. The nano developing probe can have conspicuous spectral change when the ultraviolet visible spectrum is 10nMCu<2+> in the presence of ions, and a peak absorbing peak is generated at 294nm. When the copper ion concentration is micromole, another novel absorbing peak is generated at the part near 500nm, thus being highly consistent to developing reaction. An idea is provided for a semiconductor nano material as a novel nano developing agent for detecting heavy metal ions.

Description

technical field [0001] The invention relates to the technical field of nano-chromogenic probes, in particular to a CdS nanoparticle-based nano-chromogenic probe and its preparation method and application. Background technique [0002] With the rapid development of industry, the living standards of our people are constantly improving, but the quality of life still makes us more and more worried. The development of industry has also caused many environmental problems. The discharge of three industrial wastes has polluted the water source that bred us. It directly pollutes our food. Our country is now slowing down the pace of economic growth and focusing on pollution control. Therefore, the detection and treatment of waste water and waste gas are urgent. my country is now slowing down the pace of economic growth. At the beginning of April 2011, my country's first "Twelfth Five-Year Plan" - "The Twelfth Five-Year Plan for Comprehensive Prevention and Control of Heavy Metal Pollu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/78B82Y15/00
Inventor 单云张凤
Owner NANJING XIAOZHUANG UNIV
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