Carbon quantum dot taking fish scale as raw material, and preparation method and applications thereof
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A technology of carbon quantum dots and fish scales, which is applied to the application field in the process of rapid detection of mercury ions, can solve problems such as pollution, and achieve the effects of simple operation, strong fluorescence intensity, and simple and novel method.
Active Publication Date: 2017-05-31
LIAONING UNIVERSITY
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[0005] In order to solve the problem of mercury ions polluting the environment and detect mercury ions on the spot in time, th
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Embodiment 1
[0030] Embodiment 1 A kind of carbon quantum dots with grass carp fish scale as raw material
[0031] (1) The preparation method is as follows
[0032] 1) Recover the scales of grass carp, rinse them repeatedly with warm water to remove excess blood and grease, wash them, lay them flat on a stainless steel plate to ventilate and dry them, and cut them into pieces.
[0033] 2) According to the solid-liquid ratio of 1g:80mL, mix 0.5g grass carp fish scale with 40mL ultrapure water, transfer to the reaction kettle, put it in the explosion-proof film, seal it, and then put it into the microwave hydrothermal synthesizer, at 210℃ Under microwave heating for 2.00h, a brown-yellow suspension was obtained.
[0034] In the microwave hydrothermal synthesizer, the microwave heating process is: In the microwave hydrothermal synthesizer, the microwave heating is divided into seven stages: the first stage is heated to 120°C in 10 minutes; the second stage is kept at 120°C for 5 minutes; the...
Embodiment 2
[0046] Example 2 Application of carbon quantum dots using fish scales as raw material in specific detection of mercury ions
[0047] (1) The influence of other metal ions
[0048] Accurately weigh 0.0150g Ni(NO 3 ) 2 ·6H 2 O, 0.0130g CuSO 4 ·5H 2 O, 0.0145g Co(NO 3 ) 2 ·6H 2 O, 0.0169g AgNO 3 , 0.0090g MnSO 4 , 0.0144g ZnSO 4 , 0.0140g FeCl 3 ·6H 2 O, 0.0135g FeSO 4 ·7H 2 O, 0.0830g Pb(NO 3 ) 2 , 0.0200g Cr(NO 3 ) 3 , 0.0154g Cd(NO 3 ) 2 , 0.0158gBa(OH) 2 ·8H 2 O, 0.0309g (NH 4 ) 6 Mo 7 o 24 4H 2 O, 0.0122g Bi(NO 3 ) 3 ·5H 2 A total of 14 different metal salt solids were dissolved in ultrapure water, and the volume was adjusted to 500 mL to obtain metal ion solutions with a concentration of 100 μM for each metal ion, and placed in a dark place away from light for later use.
[0049] Dilute the carbon quantum dots prepared in Example 1 with ultrapure water at a dilution ratio of 1:3 to obtain a diluted carbon quantum dot solution.
[0050] The car...
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Abstract
The invention relates to a carbon quantum dot taking fish scale as a raw material, and a preparation method and applications thereof. The preparation method comprises following steps: fish scale is mixed with ultrapure water, and an obtained mixture is delivered into a reaction vessel; the reaction vessel is sealed with explosion-proof membrane, and is delivered into a microwave hydrothermal synthesizer for microwave heating so as to obtain a suspension; the suspension is allowed to stand, is cooled to room temperature, and is filtered so as to obtain a filtrate, and the filtrate is subjected to concentration so as to obtain a concentrate; the concentrate is packaged with a dialysis bag, and the two ends of the dialysis bag are sealed using dialysis clamps; dialysis is carried out for 24h at 4 DEG C in dark environment so as to obtain carbon quantum dot, wherein in dialysis process, the ultrapure water is replaced every 8h. The preparation method is simple and novel; waste fish scale is recycled; the raw materials are natural; the carbon quantum dot contains no impurity; quantum yield is high; waste is changed into valuables; development of recycling economy is realized; waste recycling is realized effectively; the carbon quantum dot is beneficial for rapid detection of mercury ions; problems can be discovered early, and solved in time; establishment of prefect contingency plan is realized; and further pollution is prevented.
Description
technical field [0001] The invention belongs to the technical field of preparation of nanomaterials, and specifically relates to the preparation of water-soluble carbon quantum dots by using a microwave hydrothermal synthesis method using fish scales rich in natural cysteine as a carbon source, and its application in the process of rapid detection of mercury ions . Background technique [0002] Mercury is a substance that can exist in the environment for a long time, and has the characteristics of persistence, easy migration, high bioaccumulation and high biotoxicity. Mercury and its derivatives, organic mercury, as a class of important toxic and harmful environmental pollutants, can exist in the atmosphere and food chain for a long time, and can migrate over long distances. China has a long history of using mercury, and there have been incidents of mercury pollution caused by industrial use of mercury in history. At present, some mercury mines and areas near non-ferrous ...
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