Preparation of a Graphene Oxide Quantum Dot-Brianite Coordination Complex
A technology of graphene oxide and quantum dots, which is applied in the fields of alkali metal oxides/hydroxides, alkali metal compounds, inorganic chemistry, etc., can solve problems such as difficult separation and limited application, achieve large surface area, simple preparation method, good performance effect
Active Publication Date: 2018-05-22
NANJING UNIV
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However, these oxygen-containing functional groups also make graphene oxide quantum dots have good water solubility, making it difficult to separate from the solution, which limits its application.
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[0022] Example: The method for preparing graphene oxide quantum dots in the first step refers to the previous literature (J.Peng et al., Nano Lett.2012, 12, 844-849), add 6.7mL concentrated nitric acid to 0.1g carbon fiber, and then slowly add 20mL of concentrated sulfuric acid, keep stirring, and then ultrasonic for 3 hours, so that the carbon fibers can be dispersed into smaller particles. Transfer the sonicated mixed solution to a three-necked flask, heat at 125°C for 24 hours, and dilute to 250mL with water after the solution is cooled. The second step prepares the graphene oxide quantum dot-Brianite coordination complex, adds zinc sulfate heptahydrate 0.6g in the solution obtained in the first step, and takes an appropriate amount of solution after fully dissolving (take the hollow sphere sample). 25mL, take 35mL for sheet samples), adjust the pH of the solution to 4-5 with anhydrous sodium carbonate, then adjust the pH to 5.5 with sodium carbonate solution, transfer the ...
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Abstract
The invention discloses a method for preparing a graphene oxide quantum dot-brianyoungite ligand compound. The method comprises the following steps: firstly, preparing a graphene oxide quantum dot, adding concentrated nitric acid which is more than or equal to 20 times weight of carbon fibers into the carbon fibers, slowly adding concentrated sulfuric acid, further stirring, and performing ultrasonic treatment for 2-5 hours to disperse the carbon fibers into small particles; heating the mixed solution which is subjected to ultrasonic treatment to 100-150 DEG C for 16-36 hours, and adding water to dilute the solution after the solution is cooled; secondly, adding zinc sulfate heptahydrate which is 3-10 times weight of graphene into the solution prepared in the first step, sufficiently dissolving, regulating the pH of a proper amount of solution to 4-5.5 with anhydrous sodium carbonate, transferring the solution into a hydrothermal kettle, and reacting at 200 DEG C for 3-4 hours to obtain the ligand compound; and washing to remove impurities on the surface of a product. The prepared compound has a relatively good methylene blue adsorption characteristic, and can be used for treating pollution.
Description
technical field [0001] The invention relates to a preparation method of graphene oxide, in particular to a preparation method of graphene oxide quantum dot-Brianite coordination complex. Background technique [0002] Since the concept of graphene was proposed, graphene and its derivatives have received more and more attention. In 2012, the journal Nano Letters published the preparation of graphene oxide quantum dots (J.Peng et al., NanoLett.2012,12,844-849), the preparation method of this graphene oxide quantum dots can bring a large number of Oxygen-containing functional groups, so they have good fluorescence characteristics. The presence of these oxygen-containing functional groups may also have other excellent properties, such as adsorption and catalysis. However, these oxygen-containing functional groups also make graphene oxide quantum dots have good water solubility, making it difficult to separate from the solution, which limits its application. [0003] Therefore, ...
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IPC IPC(8): C09K11/65B01J20/02B01J20/28
CPCB01J20/02B01J20/28021B01J20/28033C09K11/65
Inventor 朱晓斌吴兴龙沈剑沧
Owner NANJING UNIV