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Preparation method for water-soluble carbon dots
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A water-soluble carbon dot and solution technology, applied in the fields of chemistry and material science, can solve the problems of complex operation, secondary pollution, low yield, etc., and achieve the effect of simple and convenient operation
Inactive Publication Date: 2015-02-18
ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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Problems solved by technology
At present, most of the synthesis methods of carbon dots have defects such as complicated operation, low yield, and secondary pollution caused by the use of acid-base solution.
Method used
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Embodiment 1
[0026] Carbon dots were prepared from bagasse as follows:
[0027] 1) After removing the dross from the bagasse, dry it, pulverize it, put it in a crucible and calcinate it in a muffle furnace at 350°C for 80min.
[0028] 2) Weigh 1 g of calcined ash into a conical flask, add 100 mL of double distilled water, and sonicate for 1 h.
[0029] 3) Suction filter the solution after ultrasonication, take the filtrate, centrifuge at a speed of 12000r / min for 30min, take the supernatant after centrifugation to obtain a carbon dot solution.
[0030] 4) After drying and weighing, re-dissolve with twice distilled water to obtain a carbon dot solution with a mass concentration.
Embodiment 2
[0032] Prepare carbon dots from melon seed shells as follows:
[0033] 1) After removing the dross from the melon seed shells, dry and pulverize them, place them in a crucible and calcinate them in a muffle furnace at 380°C for 80 minutes.
[0034] 2) Weigh 1 g of calcined ash into a conical flask, add 100 mL of double distilled water, and sonicate for 1 h.
[0035] 3) Suction filter the solution after ultrasonication, take the filtrate, centrifuge at a speed of 12000r / min for 30min, take the supernatant after centrifugation to obtain a carbon dot solution.
[0036] 4) After drying and weighing, re-dissolve with twice distilled water to obtain a carbon dot solution with a mass concentration.
Embodiment 3
[0038] Prepare carbon dots from okara according to the following steps:
[0039] 1) Dried bean dregs were dried and pulverized, placed in a crucible and calcined in a muffle furnace at 350°C for 80 minutes.
[0040] 2) Weigh 1 g of calcined ash into a conical flask, add 100 mL of double distilled water, and sonicate for 1 h.
[0041] 3) Suction filter the solution after ultrasonication, take the filtrate, centrifuge at a speed of 12000r / min for 30min, take the supernatant after centrifugation to obtain a carbon dot solution.
[0042] 4) After drying and weighing, re-dissolve with twice distilled water to obtain a carbon dot solution with a mass concentration.
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Abstract
The invention discloses a preparation method for water-soluble carbon dots. The preparation method comprises the following steps: (1) removing dross in silicon source; conducting ashing for reservation; (2) weighing the ash after calcination, and dividing the ash in tapered bottles; adding redistilled water; placing the tapered bottles into an ultrasonic instrument for ultrasonography; (3) conducting suction filtration on the solution after ultrasonography; (4) taking filter liquor; conducting centrifugation in a high speed centrifuge; taking supernatant liquor after centrifugation to obtain carbon dot solution; (5) conducting drying and weighting, and dissolving again with distilled water to obtain mass concentration carbon dot solution; the silicon source is bagasse, melon-seed shells, bean dregs, or tea leafpowder. The preparation method utilizes the bagasse, the melon-seed shells, the bean dregs, and the tea leafpowder as raw materials, and obtains the carbon dot solution through a synthesis method with simple operation; the preparation process is simple and convenient to operate; the used solvent in the preparation process is water; the preparation method is energy-saving, pollution-free, and green.
Description
technical field [0001] The invention belongs to the fields of chemistry and material science, and in particular relates to a green preparation method of water-soluble carbon dots. Background technique [0002] Carbon quantum dots (CQDs), a new type of carbon nanomaterial with a size below 10nm, was first discovered by Xu et al., a scientist at Clementson University in the United States, during the purification process of preparing single-walled carbon nanotubes by electrophoresis. . [0003] Carbon dots are an environmentally friendly fluorescent nanomaterial with similar optical properties to semiconductorquantum dots. In addition to the advantages of traditional semiconductorquantum dots such as excellent optical properties and small size, they also have low cytotoxicity, no light blinking Performance, good biocompatibility, easy large-scale synthesis and functional modification, low preparation cost and mild reaction conditions have incomparable advantages. It has good...
Claims
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