Unlock instant, AI-driven research and patent intelligence for your innovation.

Mercury ion probe based on doped ion luminescent mechanism and its synthesis method and application

A mercury ion and fluorescent probe technology, applied in the nanometer field, can solve the problems affecting the accuracy of the probe, and achieve the effects of fast reaction speed, good selectivity, and wide linear range

Inactive Publication Date: 2018-09-07
WUHAN UNIV
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This interference will greatly affect the accuracy of the probe, so it is particularly important to develop a heavy metal ion detection method with a new detection mechanism

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
  • Mercury ion probe based on doped ion luminescent mechanism and its synthesis method and application
  • Mercury ion probe based on doped ion luminescent mechanism and its synthesis method and application
  • Mercury ion probe based on doped ion luminescent mechanism and its synthesis method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: aqueous phase synthesis Mn:ZnSe quantum dot

[0031] 31.6mg (0.4mol) Se powder and 37.8mg (1.0mol) NaBH 4 The solids were mixed evenly, injected with 2 mL of ultrapure water, and stirred at 25°C for 1 h to obtain a colorless and transparent NaHSe solution.

[0032] 0.0025mmol of Mn(OAc) 2 Dissolve in 10mL water together with 3mmol mercaptopropionic acid, adjust the pH of the solution to 7, then pass nitrogen gas to the mixed solution for 30min to remove oxygen, then add 0.063mmol newly prepared NaHSe solution to obtain the MnSe nanoparticle dispersion; MnSe nanoparticles Heat the dispersion to 100°C, then add 0.125mmol Zn(OAc) 2 React for 30 minutes to obtain a Mn:ZnSe quantum dot dispersion; centrifuge the obtained Mn:ZnSe quantum dot dispersion, dialyze, and vacuum dry for 48 hours to obtain solid Mn:ZnSe quantum dots. After measurement, the particle size of the Mn:ZnSe quantum dots prepared in Example 1 is 2nm, and the fluorescence intensity of the M...

Embodiment 2

[0033] Embodiment 2: aqueous phase synthesis Mn:ZnSe quantum dot

[0034] 31.6mg (0.4mol) Se powder and 37.8mg (1.0mol) NaBH 4 The solids were mixed evenly, injected with 2 mL of ultrapure water, and stirred at 25°C for 1 h to obtain a colorless and transparent NaHSe solution.

[0035] 0.0025mmol of Mn(OAc) 2 Dissolve 3mmol of mercaptopropionic acid in 10mL of water, adjust the pH of the solution to 8, and then pass nitrogen gas to the mixed solution for 30min to remove oxygen; then add 0.063mmol of newly prepared NaHSe solution to obtain a dispersion of MnSe nanoparticles; MnSe nanoparticles Heat the dispersion to 100°C, then add 0.125mmol Zn(OAc) 2 React for 30 minutes to obtain a Mn:ZnSe quantum dot dispersion; centrifuge the obtained Mn:ZnSe quantum dot dispersion, dialyze, and vacuum dry for 48 hours to obtain solid Mn:ZnSe quantum dots.

Embodiment 3

[0036] Embodiment 3: aqueous phase synthesis Mn:ZnSe quantum dot

[0037] 31.6mg (0.4mol) Se powder and 37.8mg (1.0mol) NaBH 4 The solids were mixed evenly, injected with 2 mL of ultrapure water, and stirred at 25°C for 1 h to obtain a colorless and transparent NaHSe solution.

[0038] 0.0025mmol of Mn(OAc) 2 and 3mmol of mercaptopropionic acid were dissolved in 10mL of water, and the pH of the solution was adjusted to 9. After the mixed solution was transferred to the reaction system, nitrogen gas was passed for 30min, and then 0.063mmol of newly prepared NaHSe solution was added to obtain a dispersion of MnSe nanoparticles; the MnSe nanoparticles Heat the dispersion to 100°C, then add 0.125mmol Zn(OAc) 2 React for 30 minutes to obtain a Mn:ZnSe quantum dot dispersion; centrifuge the obtained Mn:ZnSe quantum dot dispersion, dialyze, and vacuum dry for 48 hours to obtain solid Mn:ZnSe quantum dots.

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 diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses detecting method for specially recognizing Hg <2+> in a water phase by taking a manganese doping zinc selenide quantum dot as a quantum dot. Based on a doping ion light-emitting mechanism, the manganese doping zinc selenide quantum dot with low fluorescence intensity is obtained by shortening reaction time and reducing pH of reaction, wherein the grain size of the quantum dot is 2.0 nm, and the quantum dot does not have fluorescence at 600 nm; after Hg<2+> is added, Mn<2+> and Hg<2+> in the manganese doping zinc selenide quantum dot generate cation exchange reaction, so that fluorescence at 600 nm is remarkably strengthened, and a fluorescence strengthening phenomenon does not appear as a result of addition of other ions. The method is simple to operate, is high in selectivity, has detection limit which can reach 7 nM, can be applied to quick, low-cost and high-sensitive detection of mercury ion in a water body, soil and food of environment, and has a very good application prospect.

Description

technical field [0001] The invention relates to a manganese-doped zinc selenide quantum dot mercury ion probe based on the luminescent mechanism of doped ions and its synthesis method and its specific detection of Hg in the water phase 2+ The method belongs to the field of nanotechnology. Background technique [0002] In recent years, with the rapid development of industry, the discharge of wastewater containing heavy metal ions (cadmium, lead, arsenic, mercury) has increased sharply. The pollution of heavy metal wastewater has caused great harm to human health and the environment. Most heavy metal ions and their compounds are easily absorbed by suspended particles in the water and precipitated in the sediment layer at the bottom of the water, polluting the water body for a long time. At the same time, heavy metal ions are difficult to degrade in the environment, which will undoubtedly increase their pollution to the environment. Certain heavy metals and their compounds ca...

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 Patents(China)
IPC IPC(8): C09K11/88G01N21/64B82Y20/00B82Y40/00
CPCB82Y20/00B82Y40/00C09K11/88G01N21/643
Inventor 刘义周志强杨立云颜稔陈纪磊蒋风雷
Owner WUHAN UNIV