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Application of heteroatoms doped aqueous carbon quantum dot in photocatalyst

A technology of carbon quantum dots and photocatalysts, which is applied in the application field of heteroatom-doped water-soluble carbon quantum dots on photocatalysts

Active Publication Date: 2013-06-12
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the research on the use of water-soluble carbon quantum dots as photocatalysts is still in its infancy, and carbon quantum dots without heteroatom doping need to be adsorbed on supports such as iron oxide, titanium oxide, zinc oxide, etc. to be used as photocatalysts[J. Mater.Chem.,2012,22,24230-24253]

Method used

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  • Application of heteroatoms doped aqueous carbon quantum dot in photocatalyst
  • Application of heteroatoms doped aqueous carbon quantum dot in photocatalyst
  • Application of heteroatoms doped aqueous carbon quantum dot in photocatalyst

Examples

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Effect test

Embodiment 1

[0040] A method for preparing water-soluble carbon quantum dots doped with N and P diatoms, including the following steps:

[0041] Put 10mg of polymer PPV1 solid powder into a beaker, add 40mL of 0.5M hydrochloric acid aqueous solution, and mix well; transfer the uniformly mixed reaction solution into a hydrothermal reactor, the reaction temperature is controlled at 250℃, the reaction time is 12 hours, after cooling After separation and purification, the water-soluble carbon quantum dots doped with N and P diatoms are obtained.

[0042] Application of the above-mentioned water-soluble carbon quantum dots doped with N and P diatoms as a new type of photocatalyst in the degradation of organic pollutants in the environment: 100 mg of water-soluble carbon quantum dots doped with N and P diatoms are diffused to 100 mL with a concentration of 10 -5 In the Rhodamine B aqueous solution of M, then transfer the mixed solution to a hermetically sealed quartz container with a condenser, stir f...

Embodiment 2

[0046] A method for preparing water-soluble carbon quantum dots doped with S and N diatoms, including the following steps:

[0047] Put 10mg of polymer PT1 solid powder into a beaker, add 40mL of 5M sulfuric acid aqueous solution, mix well; transfer the uniformly mixed reaction solution into a microwave reactor, control the reaction temperature at 150℃, reaction time 12 hours, and separate and purify after cooling , The water-soluble carbon quantum dots doped with S and N diatoms are obtained.

[0048] (Absorption spectrum such as figure 1 , The TEM image of carbon quantum dots is as figure 2 )

[0049] The application of the above-mentioned water-soluble carbon quantum dots doped with S and N diatoms as a new type of photocatalyst in the degradation of organic pollutants in the environment: 100 mg of water-soluble carbon quantum dots doped with S and N diatoms are diffused to 100 mL with a concentration of 10 -5 In the Rhodamine B aqueous solution of M, then transfer the mixed solu...

Embodiment 3

[0053] A method for preparing water-soluble carbon quantum dots doped with Se and N diatoms, including the following steps:

[0054] Put 5mg of polymer PT2 solid powder into a beaker, add 40mL of 1M potassium hydroxide aqueous solution, mix well; transfer the uniformly mixed reaction solution into an ultrasonic reactor, control the reaction temperature at 250℃, the reaction time is 36 hours, after cooling After separation and purification, water-soluble carbon quantum dots doped with Se and N diatoms are obtained.

[0055] Application of the above-mentioned water-soluble carbon quantum dots doped with Se and N diatoms as a new type of photocatalyst in the degradation of organic pollutants in the environment: 100 mg of Se, N diatomic doped water-soluble carbon quantum dots are diffused to a concentration of 10 -5 In the Rhodamine B aqueous solution of M, then transfer the mixed solution to a hermetically sealed quartz container with a condenser, stir for 2 hours, and irradiate with a...

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Abstract

The invention discloses a use of a heteroatoms doped aqueous carbon quantum dot as a novel efficient photocatalyst. The various-heteroatoms doped aqueous carbon quantum dot contains one or more of heteroatoms comprising N, S, Si, Se, P, As, Ge, Gd, B, Sb, Te and the like, and the absorption spectrum wavelength of the heteroatoms doped aqueous carbon quantum dot is in a range of 300-850nm. Researches find that the heteroatoms doped aqueous carbon quantum dot can realize the efficient catalytic degradation of organic pollutants in the environment under the irradiation of sunlight, can also realize the efficient photolysis of water to prepare hydrogen, and has huge application prospects in the environment and energy fields.

Description

Technical field [0001] The invention relates to the application of heteroatom-doped water-soluble carbon quantum dots that can be used as a novel high-efficiency photocatalyst in the field of catalytic degradation of organic pollutants in the environment and photolysis of water to prepare hydrogen. Background technique [0002] Energy crisis and environmental degradation are two major problems facing human society. Many environmental problems stem from the process of energy production and utilization. Therefore, the development and utilization of clean and pollution-free new energy is not only conducive to eliminating the energy crisis, but also conducive to preventing environmental degradation. Compared with other energy sources, solar energy has the characteristics of large reserves, sustainable, clean and pollution-free. Effective use of solar energy is one of the most perfect ways to solve energy and environmental problems. Photocatalytic technology, as a promising means of ...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J21/18B01J23/18B01D53/86B01D53/72C02F1/30C01B3/04
CPCY02E60/364Y02E60/36Y02W10/37
Inventor 葛介超汪鹏飞蓝敏焕刘卫敏
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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