| abstract |
The invention relates to a magnesium ion-doped carbon quantum dot and a preparation and application method thereof, characterized in that: 1) under oil bath conditions, magnesium gluconate and 1-aminopropyl-3-methylimidazolium bromide are mixed by molar Melt and mix at a ratio of 1:1~4, stir and mix to form a gel; 2) Under nitrogen protection and magnetic stirring, the gel is pyrolyzed at 180~240 ° C for 1~6h, and the product is cooled; 3) The product is dissolved A brown-black dispersion is obtained in ultrapure water, the mass ratio of the product to water is 1:10~50, and the dispersion is centrifuged to obtain an upper dispersion containing carbon quantum dots; 4) Move the upper dispersion to a dialysis bag , dialyze in ultrapure water for 3 to 5 days; 5) Freeze-dry the dispersion and dry it by blasting. The advantages of the invention: the magnesium ion-doped carbon quantum dots have small particle size, uniform size distribution, simple preparation process, easy operation, and are suitable for industrial production; the magnesium ion-doped carbon quantum dots are added to the water-based lubricating base fluid, and the average friction coefficient of the decreased by 60.6%; wear volume decreased by 81.8%. |