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Carbon quantum dot/mesoporous layered titanium dioxide as well as preparation method and application thereof

A titanium dioxide, carbon quantum dot technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of complex preparation process and high energy consumption, and achieve simple process procedures, low energy consumption, easy-to-remove effect

Active Publication Date: 2021-04-02
NEIJIANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the deficiencies or defects in the above-mentioned prior art, the purpose of the present invention is to provide a carbon quantum dot / mesoporous layered titanium dioxide and its preparation method and application, which can effectively solve the problems of complex preparation process and high energy consumption in the traditional method. problems, and further expanded the practical application range of titanium dioxide

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  • Carbon quantum dot/mesoporous layered titanium dioxide as well as preparation method and application thereof
  • Carbon quantum dot/mesoporous layered titanium dioxide as well as preparation method and application thereof
  • Carbon quantum dot/mesoporous layered titanium dioxide as well as preparation method and application thereof

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Embodiment 1

[0048] The present embodiment 1 provides a kind of carbon quantum dot / mesoporous layered titanium dioxide, and its preparation method comprises the following steps:

[0049] Step 1, preparation of carbon quantum dot solution:

[0050] Dissolve 3g of citric acid in 45mL of deionized water, transfer the solution to a 100mL polytetrafluoroethylene reactor, and then place it in an electric constant temperature blast drying oven at 180°C for 8 hours. After the reaction is completed, cool to room temperature to obtain a light yellow transparent solution, and finally dialyze the solution to obtain a carbon quantum dot solution;

[0051] Step 2, preparation of mesoporous layered titanium dioxide powder:

[0052] (1) Weigh 4.8gTi(SO 4 ) 2 In a beaker, add 100mL of deionized water and stir until dissolved, slowly add ammonia water dropwise to adjust the pH=8-9, and obtain a white precipitate, which is centrifuged and washed several times with deionized water to remove impurity ions; ...

Embodiment 2

[0058] The difference between the present embodiment 2 and embodiment 1 is only: the mass ratio of citric acid in the carbon quantum dot solution and titanium dioxide in the mesoporous layered titanium dioxide powder in the preparation of step 3, carbon quantum dots / mesoporous layered titanium dioxide is: 0.002:1.

Embodiment 3

[0060] The difference between the present embodiment 3 and the embodiment 1 is only: step 3, the mass ratio of citric acid in the carbon quantum dot solution and the titanium dioxide in the mesoporous layered titanium dioxide powder in the preparation of carbon quantum dots / mesoporous layered titanium dioxide is: 0.003:1.

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Abstract

The invention discloses carbon quantum dot / mesoporous layered titanium dioxide as well as a preparation method and application thereof, and belongs to the technical field of titanium dioxide preparation. Carbon quantum dots are prepared by a hydrothermal method, cetyltrimethylammonium bromide (CTAB) is used as a morphology control agent, mesoporous layered titanium dioxide powder (CTAB-TiO2) is prepared by a precipitation peptization method, and the carbon quantum dots and the CTAB-TiO2 are compounded to obtain the carbon quantum dot / mesoporous layered titanium dioxide (CQDs / CTAB-TiO2). The CQDs / CTAB-TiO2 can react with conjugated pi bonds formed by organic pollutants, the adsorption effect and photocatalytic performance on the organic pollutants are improved, the problems of complex preparation process and high energy consumption in traditional methods can be effectively solved, and the actual application range of titanium dioxide is further expanded.

Description

technical field [0001] The invention relates to the technical field of titanium dioxide preparation, in particular to a carbon quantum dot / mesoporous layered titanium dioxide and its preparation method and application. Background technique [0002] Quantum dot sensitization is the TiO 2 A method to improve the photocatalytic activity of catalysts by combining with quantum dots. However, most quantum dots are toxic heavy metal ions, which pose serious harm to the environment. In recent years, a class of quantum dots, a new type of carbon nanomaterial with fluorescent properties, has been discovered. The size of carbon quantum dots (CQDs) is less than 10nm, and it is composed of quasi-discrete spherical carbon nanoparticles. It has the characteristics of stable physical and chemical properties, non-toxicity, and easy functional modification. [0003] At present, it has been reported in the literature that the combination of carbon quantum dots and carbon dioxide can improve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/18B01J35/02B01J35/10C02F1/30C02F101/30
CPCB01J21/18C02F1/30C02F2101/308C02F2305/10B01J35/40B01J35/647B01J35/39Y02W10/37
Inventor 张理元阳金菊韩炎霖王碧玉由耀辉
Owner NEIJIANG NORMAL UNIV
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