Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Metal ion detection method based on graphene quantum dot fluorescent probe array

A technology of graphene quantum dots and metal ions, applied in the field of nanoscience, can solve problems such as kidney damage, nervous system, and digestive system heart disease, and achieve the effects of strong controllability, intuitive result judgment, and simple preparation methods

Pending Publication Date: 2020-08-18
NANTONG UNIVERSITY
View PDF7 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some elements are highly toxic to organisms. For example, lead will cause lesions in the nervous system, digestive system and heart, and mercury will cause serious damage to kidney function.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Metal ion detection method based on graphene quantum dot fluorescent probe array
  • Metal ion detection method based on graphene quantum dot fluorescent probe array
  • Metal ion detection method based on graphene quantum dot fluorescent probe array

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment 1

[0029] Graphene quantum dot fluorescent probe arrays to detect metal ions include the following steps:

[0030] (1) Preparation of graphene quantum dots: 30 mg of graphene oxide powder was added to 30 mL of secondary water, placed in an ultrasonic cleaner for ultrasonic dispersion, and then 1 mL of hydrogen peroxide was added for uniform ultrasonic dispersion. The mixed solution was transferred to the reaction kettle, sealed and reacted at 180°C for 90 minutes. The reaction solution was filtered through a 0.22 μm water-based filter membrane, and the filtrate was collected to obtain an aqueous dispersion of graphene quantum dots, which was freeze-dried. The results show that the synthesized graphene quantum dots are uniform in size, with an average particle size of 3.7nm ( figure 1 a), when excited with 360nm light, it can emit fluorescence with a maximum emission wavelength of 496nm ( figure 2 ).

[0031] (2) Preparation of nitrogen-doped graphene quantum dots: 50 mg of graphene ...

specific Embodiment 2

[0036] Graphene quantum dot fluorescent probe arrays to detect metal ions include the following steps:

[0037] (1) Preparation of graphene quantum dots: 30 mg of graphene oxide powder was added to 30 mL of secondary water, placed in an ultrasonic cleaner for ultrasonic dispersion, and then 1 mL of hydrogen peroxide was added for uniform ultrasonic dispersion. The mixed solution was transferred to the reaction kettle, sealed and reacted at 180°C for 90 minutes. The reaction solution was suction filtered through a 0.22 μm aqueous filter membrane, and the filtrate was collected to obtain an aqueous dispersion of graphene quantum dots, which was freeze-dried. The results show that the synthesized graphene quantum dots are uniform in size, with an average particle size of 3.7 nm.

[0038] (2) Preparation of nitrogen-doped graphene quantum dots: 50 mg of graphene quantum dots were added to 100 mL of secondary water, and placed in an ultrasonic cleaner for ultrasonic dispersion for 15 m...

specific Embodiment 3

[0043] Graphene quantum dot fluorescent probe arrays to detect metal ions include the following steps:

[0044] (1) Preparation of graphene quantum dots: 30 mg of graphene oxide powder was added to 30 mL of secondary water, placed in an ultrasonic cleaner for ultrasonic dispersion, and then 1 mL of hydrogen peroxide was added for uniform ultrasonic dispersion. The mixed solution was transferred to the reaction kettle, sealed and reacted at 180°C for 90 min. The reaction solution was suction filtered through a 0.22 μm aqueous filter membrane, and the filtrate was collected to obtain an aqueous dispersion of graphene quantum dots, which was freeze-dried. The results show that the synthesized graphene quantum dots are uniform in size, with an average particle size of 3.7 nm.

[0045] (2) Preparation of nitrogen-doped graphene quantum dots: 50 mg of graphene quantum dots were added to 100 mL of secondary water, and placed in an ultrasonic cleaner for ultrasonic dispersion for 15 minut...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a metal ion detection method based on a graphene quantum dot fluorescent probe array. The detection method comprises the following steps: firstly, preparing graphene quantum dots by a hydrothermal method, and doping the graphene quantum dots by taking the graphene quantum dots as a raw material to sequentially prepare nitrogen-doped graphene quantum dots, phosphorus-doped graphene quantum dots, sulfur-doped graphene quantum dots and boron-doped graphene quantum dots; and then, forming a fluorescent probe array by using the graphene quantum dots and the doped graphene quantum dots, recording the change of the fluorescence intensity of the graphene quantum dots caused by various metal ions, and detecting and distinguishing the metal ions by using a linear discriminantanalysis method. The sensor array adopted by the invention is simple in preparation method, low in cost and small in required sample amount. The sensor array can reach 100% metal ion distinguishing accuracy. Various metal ions can be simultaneously detected and distinguished. The detection period is short, and the controllability is high. Used instruments are simple, and result judgment is visual.

Description

Technical field [0001] The invention belongs to the field of nano science and technology, and specifically relates to a metal ion detection method based on a graphene quantum dot fluorescent probe array. Background technique [0002] Heavy metals and transition metals are widely present in nature. Some of these metal elements play a very important role in human life. For example, copper plays a very important regulatory function in tumor vascular growth factor. The growth and development of human cells, gene transcription and neurotransmission are inseparable from the role of zinc ions. Some elements are very toxic to organisms. For example, lead can cause diseases of the nervous system, digestive system and heart, and mercury can cause serious damage to kidney function. Therefore, research on the detection and identification of various metal ions is beneficial to the detection of environmentally hazardous metal ions and the exploration of the mechanism of beneficial metal eleme...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/64C09K11/65C09K11/70B82Y20/00B82Y30/00B82Y40/00
CPCG01N21/6428C09K11/65C09K11/70B82Y20/00B82Y30/00B82Y40/00
Inventor 冀海伟吴铭敏王琦刘金霞周晓波秦玉岭吴丽
Owner NANTONG UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com