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A kind of s, se-cqds and method for detecting cr(vi) pollutants thereof

A technology for pollutants and pure water, applied in chemical instruments and methods, measuring devices, fluorescence/phosphorescence, etc., can solve the problems of affecting human health, polluting the environment, and high detection limits, achieving obvious differences in selectivity and strong anti-interference ability. , the effect of efficient detection

Active Publication Date: 2020-07-10
GUANGDONG PHARMA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the S,Se-CQDs obtained in this invention mainly use the Se element in it to participate in the "cutting" of the disulfide bond in the hair, so it is used as a hair styling agent, and it is not used for Cr(VI) pollutants detection
[0005] In view of the problems of Cr(VI) detection methods such as polluting the environment, affecting human health, high detection limit, complicated steps or poor selectivity, it is necessary to find a method for S,Se-CQDs and its detection of Cr(VI) pollutants, The detection method is simple, low in cost, and has strong selectivity for the detection of Cr(VI)

Method used

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  • A kind of s, se-cqds and method for detecting cr(vi) pollutants thereof
  • A kind of s, se-cqds and method for detecting cr(vi) pollutants thereof
  • A kind of s, se-cqds and method for detecting cr(vi) pollutants thereof

Examples

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Embodiment 1

[0036] Dissolve citric acid (5.0g), mercaptoethylamine (0.8g) and sodium selenite (0.06g) in 40mL of pure water in sequence. After fully dissolved, add an appropriate amount of pure water to a total volume of 50mL, and then transfer the solution Put it into a 50mL polytetrafluoroethylene lining, put the lining into a stainless steel reactor and place it in an oven at 150°C for 150 minutes of hydrothermal reaction, then take out the solution after the temperature of the oven drops to room temperature, and then put it under the condition of 8000r / min Centrifuge for 20 minutes, separate the supernatant, and then dialyze with a 200Da dialysis bag for 2 days, change the water every 8 hours, and finally freeze-dry to obtain the target product: sulfur-selenium doped carbon quantum dots (S,Se-CQDs).

Embodiment 2

[0038] Dissolve citric acid (6.0g), mercaptoethylamine (0.8g) and sodium selenite (0.06g) in 40mL of pure water in turn. After fully dissolved, add an appropriate amount of pure water to a total volume of 50mL, and then transfer the solution Put it into a 50mL polytetrafluoroethylene lining, put the lining into a stainless steel reactor and place it in an oven at 150°C for 150 minutes of hydrothermal reaction, then take out the solution after the temperature of the oven drops to room temperature, and then put it under the condition of 8000r / min Centrifuge for 20 minutes, separate the supernatant, and then dialyze with a 200Da dialysis bag for 2 days, change the water every 8 hours, and finally freeze-dry to obtain the target product: sulfur-selenium doped carbon quantum dots (S,Se-CQDs).

Embodiment 3

[0040]Dissolve citric acid (8.0g), mercaptoethylamine (0.8g) and sodium selenite (0.06g) in 40mL of pure water in sequence, add appropriate amount of pure water to a total volume of 50mL after the dissolution is sufficient, and then transfer the solution Put it into a 50mL polytetrafluoroethylene lining, put the lining into a stainless steel reactor and place it in an oven at 150°C for 150 minutes of hydrothermal reaction, then take out the solution after the temperature of the oven drops to room temperature, and then put it under the condition of 8000r / min Centrifuge for 20 minutes, separate the supernatant, and then dialyze with a 200Da dialysis bag for 2 days, change the water every 8 hours, and finally freeze-dry to obtain the target product: sulfur-selenium doped carbon quantum dots (S,Se-CQDs).

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PUM

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Abstract

The invention provides a kind of S,Se-CQDs and its method for efficiently detecting Cr(VI) pollutants, which belong to the interdisciplinary field of nano-materials and environmental analysis, by dissolving citric acid, mercaptoethylamine and sodium selenite in pure In water, after the hydrothermal reaction, the temperature is naturally cooled to room temperature, the solution is taken out and centrifuged, the supernatant is separated, dialyzed and freeze-dried to prepare doped carbon quantum dots with high fluorescence intensity S,Se‑CQDs, the The process for preparing S,Se-CQDs in the method is simple and low in cost, and the prepared S,Se-CQDs can efficiently detect Cr(VI). When an appropriate amount of vitamin C(Vc) is added, the "Cr(VI) The fluorescence recovery of the +S,Se-CQD" system is 80%. The S,Se-CQD detection method for Cr(VI) is simple, low in cost, and has obvious selection differences and strong anti-interference ability.

Description

technical field [0001] The invention belongs to the intersection field of new nanometer materials and environmental analysis, and in particular relates to S, Se-CQDs and a method for detecting Cr(VI) pollutants. Background technique [0002] Cr(VI) is one of the common valence states of chromium. Compared with chromium metal, trivalent or tetravalent chromium, it is the most toxic and more easily absorbed by the human body. It can invade the human body through digestion, respiratory tract, skin and mucous membranes. So far, for the determination of Cr(VI) in water, the classic method has the national standard - diphenylcarbazide spectrophotometry (GB / T 746-1987), but this method has certain limitations, such as using Toxic test reagents such as hydrazine substances, thereby causing environmental pollution or affecting human health. Other testing methods also have the defects of high detection limit, complicated steps or poor selectivity, or based on biocompatibility conside...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/88G01N21/64
CPCC09K11/881G01N21/643G01N2021/6432
Inventor 刘意骆玉凤陈平潘妙钏
Owner GUANGDONG PHARMA UNIV