Cerium doped carbon dot and preparation method thereof and application thereof in catalytic hydrolysis of phosphate compound
A cerium doping and compound technology, applied in the field of nano-catalytic materials, can solve the problems of inapplicability and cumbersome operation.
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[0029] The invention provides a method for preparing cerium-doped carbon dots, wherein the preparation method comprises: in the presence of a solvent, mixing disodium ethylenediamine tetraacetate and cerium salt to carry out hydrothermal reaction, and then centrifuging The supernatant was dialyzed to obtain cerium-doped carbon dots.
[0030] The present invention uses disodium edetate as a carbon source and soluble cerium salt as a metal dopant to prepare the above-mentioned cerium-doped carbon dots in a heating reaction system. The above-mentioned method is different from the metal complexes reported in the past. It is carried out under solvent conditions, making the preparation process safer. At the same time, the synthesized cerium-doped carbon dots can have dual functionality, which not only has the catalytic activity of simulating enzymes for the phosphate hydrolysis reaction, but also can monitor the catalytic hydrolysis process by its own fluorescence changes, and the a...
preparation example 1
[0042] Dissolve 1 g of disodium ethylenediamine tetraacetate dihydrate in 25 mL of twice distilled water, dissolve it by ultrasonic, weigh 2.3451 g of cerium nitrate hexahydrate in the above solution, stir for 30 minutes, and mix well to obtain a mixed solution; mix the mixed solution Transfer to a 50mL stainless steel polytetrafluoroethylene high-temperature reactor, and conduct a hydrothermal reaction at 180°C for 10 hours. Take out the reactor and cool it down to room temperature naturally. After that, the product is collected by centrifugation, dialyzed with a 1000Da dialysis bag for 24 hours, and placed in a refrigerator at 4°C. Store for future use, and prepare cerium-doped carbon dots A1. Among them, the TEM image of A1 is as follows Figure 1a As shown, it can be seen from the figure that the prepared cerium-doped carbon dots A1 have relatively uniform size distribution and are close to spherical particles. Figure 1b It can be seen that the average size is 2.4nm, whic...
preparation example 2
[0044] Dissolve 1 g of disodium ethylenediamine tetraacetate dihydrate in 25 mL of twice distilled water, dissolve it by ultrasonic, weigh 2.3451 g of cerium nitrate hexahydrate in the above solution, stir for 30 minutes, and mix well to obtain a mixed solution; mix the mixed solution Transfer to a 50mL stainless steel polytetrafluoroethylene high-temperature reaction kettle, hydrothermally react at 180°C for 4 hours, take out the reaction kettle and cool it to room temperature naturally, then collect the product by centrifugation, dialyze with a 1000Da dialysis bag for 24h, and place it in a refrigerator at 4°C Store it for future use, and prepare cerium-doped carbon dots A2.
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