Nitrogen and phosphorus co-doped carbon dot (at) ZIF-8 based on potatoes as well as preparation method and application of nitrogen and phosphorus co-doped carbon dot (at) ZIF-8
A co-doping, potato technology, used in chemical instruments and methods, fluorescence/phosphorescence, other chemical processes, etc., can solve the problems of poor selectivity, high detection limit, and few active sites of carbon point materials, and achieve the detection limit. Low, high selection and high sensitivity detection, effect of simple synthesis method
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Embodiment 1
[0036] The present invention is a method for preparing potato-based nitrogen and phosphorus co-doped carbon dots @ZIF-8, specifically comprising the following steps:
[0037] Step 1, put 0.3g of potato powder in a beaker, add 15mL of ultrapure water, and add 1g of ethylenediamine and 0.6g of phosphoric acid into the solution, stir mechanically, and obtain a mixed solution after ultrasonic treatment.
[0038] Step 2, the above mixed solution is placed in a high-pressure reactor, and after hydrothermal reaction at 160 ° C for 4 hours, the high-pressure reactor is naturally cooled to room temperature, centrifuged (5000r / min) to remove large insoluble particles, and filtered with a microporous membrane (0.22 μm) to filter the supernatant to obtain a slightly yellow mixed solution.
[0039] Step 3, the above yellowish mixed solution was placed in a dialysis bag (molecular weight cut-off of 500Da) and dialyzed for 2 days to obtain an aqueous solution of nitrogen and phosphorus co-do...
Embodiment 2
[0047] The present invention is a method for preparing potato-based nitrogen and phosphorus co-doped carbon dots @ZIF-8, specifically comprising the following steps:
[0048] Step 1, put 0.6g of potato powder in a beaker, add 30mL of ultrapure water, and add 2g of ethylenediamine and 1.2g of phosphoric acid into the solution, stir mechanically, and obtain a mixed solution after ultrasonic treatment.
[0049] Step 2, the above-mentioned mixed solution is placed in a high-pressure reactor, and after hydrothermal reaction at 180 ° C for 6 hours, the high-pressure reactor is naturally cooled to room temperature, centrifuged (7000r / min) to remove large insoluble particles, and filtered with a microporous membrane (0.22 μm) to filter the supernatant to obtain a slightly yellow mixed solution.
[0050] Step 3, the above yellowish mixed solution was placed in a dialysis bag (molecular weight cut-off of 1000Da) and dialyzed for 2 days to obtain an aqueous solution of nitrogen and phosp...
Embodiment 3
[0054] The present invention is a method for preparing potato-based nitrogen and phosphorus co-doped carbon dots @ZIF-8, specifically comprising the following steps:
[0055] Step 1, put 0.9g of potato powder in a beaker, add 45mL of ultrapure water, and add 3g of ethylenediamine and 1.8g of phosphoric acid into the solution, stir mechanically, and obtain a mixed solution after ultrasonic treatment.
[0056] Step 2, the above-mentioned mixed solution is placed in a high-pressure reactor, and after hydrothermal reaction at 200 ° C for 8 hours, the high-pressure reactor is naturally cooled to room temperature, centrifuged (9000r / min) to remove large insoluble particles, and filtered with a microporous membrane (0.22 μm) to filter the supernatant to obtain a slightly yellow mixed solution.
[0057] Step 3, the above yellowish mixed solution was placed in a dialysis bag (molecular weight cut-off of 1500Da) and dialyzed for 2 days to obtain an aqueous solution of nitrogen and phosp...
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