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Photocatalyst and preparation method thereof

A photocatalyst and photocatalysis technology, applied in chemical instruments and methods, preparation of organic compounds, catalysts for physical/chemical process, etc. Achieve the effect of improving efficiency, fast mass transfer, and promoting catalytic performance

Inactive Publication Date: 2020-08-07
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] 2. For heterojunctions composed of crystalline catalysts, lattice mismatch often occurs at the interface, which is not conducive to the transfer of photogenerated charges at the interface, which restricts its commercial application process

Method used

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  • Photocatalyst and preparation method thereof
  • Photocatalyst and preparation method thereof
  • Photocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Example 1, preparation of catalytic CO 2 Reduced photocatalyst Cu-DHTP

[0052] In this example, the photocatalyst Cu-DHTP was prepared through the following steps.

[0053] (1) Add 32ml of N,N dimethylformamide, 2ml of ethanol, and 2ml of deionized water into a 50ml glass bottle to obtain a mixed solution.

[0054] (2) Add 0.75 mmol of p-2,5-dihydroxyterephthalic acid (DHTP) into the above mixed solution, and ultrasonically dissolve the DHTP to obtain a mixed solution A. Among them, the ultrasonic power is 40kHz, and the ultrasonic time is 8h.

[0055] (3) 0.75mmol CuCl 2 2H 2 O was added to the above mixed solution A, and the CuCl 2 2H 2 O was dissolved to obtain mixed solution B. Among them, the ultrasonic power is 40kHz, and the ultrasonic time is 8h.

[0056] (4) Rapidly inject 0.8 mL of triethylamine into the mixed solution B and shake for 5 min to obtain a brown gel solution.

[0057] (5) Ultrasonic treatment is performed on the above-mentioned gel solut...

Embodiment 2

[0060] 1. use scanning electron microscope to photograph the Cu-DHTP prepared by embodiment 1 to obtain its SEM figure, as figure 1 As shown, the figure shows that the Cu-DHTP material presents the morphology of nanosheets.

Embodiment 3

[0062] In the step (6) in the embodiment 1, carry out the XRD test through the centrifugal product after the vacuum freeze-drying, obtain figure 2 The XRD curve shown in , analysis of the XRD curve shows that the centrifuged product (Cu-DHTP prepared in Example 1) has an amorphous structure.

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Abstract

The embodiment of the invention relates to the technical field of CO2 reduction, and in particular, relates to a photocatalyst for catalyzing CO2 reduction and a preparation method of the photocatalyst. The photocatalyst is Cu-DHTP prepared from copper ions and 2,5-dihydroxy terephthalic acid, and the Cu-DHTP is a nano sheet material with an amorphous structure. The photocatalyst provided by the embodiment of the invention has a large number of active sites, has an obvious promotion effect on the CO2 catalytic performance, reduces the band gap, accelerates the electron transport effect, inhibits the electron-hole recombination, and can improve the utilization rate of sunlight, thereby improving the CO production efficiency by photocatalysis of CO2.

Description

technical field [0001] The embodiment of this application involves CO 2 Reduction technology field, especially related to a catalytic CO 2 Reduced photocatalyst and method for its preparation. Background technique [0002] Excessive consumption of fossil fuels will not only lead to an energy crisis, but also lead to a large amount of carbon dioxide emissions and may contribute to climate change. According to reports, the concentration of carbon dioxide in the atmosphere has increased from 280ppm before industrialization to 400ppm. CO 2 Reduction can both solve the greenhouse effect and bring clean fuels and more valuable carbon 1 (C1) products and carbon 2 products (C2) (Z. Sun, et. al. Angew Chem Int Ed 2018, 57, 7610- 7627.). Using solar energy to convert CO under natural environmental conditions 2 Photocatalytic conversion into value-added products is considered to be one of the best ways to address future renewable energy. However, photocatalytic CO 2 Conversion ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22C07C51/41C07C65/05B01D53/86B01D53/62
CPCB01J31/2213C07C51/418B01D53/8671B01D53/007B01D2257/504B01D2259/802B01J35/39C07C65/05Y02A50/20
Inventor 刘煊赫张文迪刘小明高曼
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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