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Up-conversion luminescence nanometer material modified by manganese dioxide nanosheet, preparation method thereof, detection method of hydrogen peroxide or choline and application

A nanomaterial and nanosheet technology, applied in the field of upconversion luminescent nanomaterials, can solve the problems of choline and acetylcholine lacking activity and chromophoric groups, chemical instability, and difficulty in accurate detection.

Active Publication Date: 2017-07-28
ANHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0003] Accurate detection of choline and acetylcholine is difficult due to lack of activity and chromophore
So far, there are many methods for detecting choline, but these methods have certain limitations in application due to potential toxicity and chemical instability.

Method used

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  • Up-conversion luminescence nanometer material modified by manganese dioxide nanosheet, preparation method thereof, detection method of hydrogen peroxide or choline and application
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  • Up-conversion luminescence nanometer material modified by manganese dioxide nanosheet, preparation method thereof, detection method of hydrogen peroxide or choline and application

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preparation example Construction

[0035] The invention provides a MnO 2 Nanosheet-modified NaYF 4 : Yb, the preparation method of Er / Mn up-conversion luminescence nano material, this preparation method comprises:

[0036] 1) Carry out contact reaction with erbium source, manganese source, ytterbium source, trisodium citrate, sodium fluoride, yttrium source, water, concentrated nitric acid CTAB and C1-C3 alcohol, then carry out hydrothermal reaction, then wash, separate and Get NaYF 4 : Yb, Er / Mn up-conversion luminescent nanomaterials;

[0037] 2) In the presence of protective gas and organic solvent, polyacrylic acid (PAA), diethylene glycol and NaYF 4 : Yb,Er / Mn upconversion luminescent nanomaterials undergo ligand exchange reaction to obtain PAA-modified NaYF 4 : Yb, Er / Mn up-conversion luminescent nanomaterials;

[0038] 3) NaYF modified by PAA 4 : Yb, Er / Mn up-conversion luminescent nanomaterials are dispersed in ethanesulfonic acid (MES), followed by adding potassium permanganate for contact reacti...

Embodiment 1

[0067] 1) NaYF 4 : Preparation of Yb,Er / Mn up-conversion luminescent nanomaterials:

[0068] Set Y(NO 3 ) 3 solution (0.20mol / L, 1.20mL), MnCl 2 4H 2 O solution (1.10mol / L, 145.00μL), YbCl 3 Solution (0.10mol / L, 1.00mL), Er(NO 3 ) 3 Solution (0.10mol / L, 100.00μL) solution, trisodium citrate solution (0.10mol / L, 1.75mL) and ultrapure water (2.1mL) were mixed uniformly in a beaker to form a metal-citrate complex solution.

[0069] Then, 0.10 g of CTAB (cetyltrimethylammonium bromide) and 15.00 mL of absolute ethanol were added to the metal-citrate complex solution.

[0070] Subsequently, 6.00 mL of NaF solution (1.00 mol / L) was added dropwise under stirring, and after gentle stirring for 2 h, 1.00 mL of concentrated nitric acid (the concentration of nitric acid was 65% by weight) was added to obtain a reaction precursor solution. Transfer to a 50mL reactor, and react at a constant temperature of 180°C for 4h, naturally cool to 25°C, centrifuge (10000rpm, 5min), then wash...

Embodiment 2

[0076] 1) NaYF 4 : Preparation of Yb,Er / Mn up-conversion luminescent nanomaterials:

[0077] Set Y(NO 3 ) 3 solution (0.20mol / L, 1.00mL), MnCl 2 4H 2 O solution (1.10mol / L, 135.00μL), YbCl 3 Solution (0.10mol / L, 0.8mL), Er(NO 3 ) 3 Solution (0.10mol / L, 100.00μL) solution, trisodium citrate solution (0.10mol / L, 1.65mL) and ultrapure water (2.10mL) were mixed uniformly in a beaker to form a metal-citrate complex solution.

[0078] Then, 0.11 g of CTAB (cetyltrimethylammonium bromide) and 14.00 mL of absolute ethanol were added to the metal-citrate complex solution.

[0079] Subsequently, 4.00 mL of NaF solution (1.00 mol / L) was added dropwise under stirring, and after gentle stirring for 2 h, 0.50 mL of concentrated nitric acid (the concentration of nitric acid was 66% by weight) was added to obtain a reaction precursor solution. Transfer to a 50mL reactor, and react at a constant temperature of 160°C for 3h, naturally cool to 25°C, centrifuge (10000rpm, 5min), then wash...

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Abstract

The invention discloses a NaYF4: Yb, Er / Mn up-conversion luminescence nanometer material modified by manganese dioxide nanosheet, a preparation method thereof, a detection method of hydrogen peroxide or choline and an application. The method includes steps of 1), performing contact reaction and hydrothermal reaction on erbium source, manganese source, ytterbium source, trisodium citrate, sodium fluoride, yttrium source, water, concentrated nitric acid CTAB and alcohol; washing and separating so as to acquire the NaYF4, Yb, Er / Mn up-conversion luminescence nanometer material; 2), in the presence of protection gas and organic solvent, performing ligand exchange reaction on polyacrylic acid, diethylene glycol, and NaYF4: Yb, Er / Mn so as to acquire PAA modified NaYF4: Yb, Er / Mn up-conversion luminescence nanometer material; 3), spreading the PAA modified NaYF4: Yb, Er / Mn up-conversion luminescence nanometer material at ethanesulfonic acid, and then adding potassium permanganate to perform the contact reaction, so as to acquire the NaYF4: Yb, Er / Mn modified by MnO2 nanosheet. The up-conversion luminescence nanometer material can detect hydrogen oxide or choline.

Description

technical field [0001] The invention relates to an up-conversion luminescent nanometer material, in particular to an upconversion luminescent nanometer material modified by manganese dioxide nanosheets, a preparation method, a detection method and application of hydrogen peroxide or choline. Background technique [0002] Choline plays a very important role in physiology, such as promoting brain development and improving memory ability. Therefore, choline is added as a basic nutrient in daily foods such as infant formula. In addition, choline is involved in the synthesis of acetylcholine. In the central nervous system, acetylcholine is involved in information transmission and as a neurotransmitter, acetylcholine has an important impact on human body functions. Abnormal concentrations of acetylcholine can cause many diseases, such as Parkinson's disease, Alzheimer's disease and multiple sclerosis of the brain and spinal cord. Therefore, it is very important to detect the con...

Claims

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Application Information

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IPC IPC(8): C09K11/02C09K11/85G01N21/64
CPCC09K11/025C09K11/7773G01N21/6428
Inventor 陈红旗郜中玲
Owner ANHUI NORMAL UNIV
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