Two-dimensional carbon/boron-titanium dioxide composite oxide, preparation method thereof and application of two-dimensional carbon/boron-titanium dioxide composite oxide in photocatalytic hydrogen production

A composite oxide and titanium dioxide technology, applied in metal/metal oxide/metal hydroxide catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of loose contact structure, unfavorable transmission, etc. Good controllability and repeatability, mild reaction conditions and low production cost

Active Publication Date: 2022-07-26
ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Undoubtedly, the composites prepared by post-grafting often have a loose contact structure, which is very unfavorable for the transport of photogenerated electrons on the electron transport path in 2D carbon.

Method used

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  • Two-dimensional carbon/boron-titanium dioxide composite oxide, preparation method thereof and application of two-dimensional carbon/boron-titanium dioxide composite oxide in photocatalytic hydrogen production
  • Two-dimensional carbon/boron-titanium dioxide composite oxide, preparation method thereof and application of two-dimensional carbon/boron-titanium dioxide composite oxide in photocatalytic hydrogen production
  • Two-dimensional carbon/boron-titanium dioxide composite oxide, preparation method thereof and application of two-dimensional carbon/boron-titanium dioxide composite oxide in photocatalytic hydrogen production

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A preparation method of two-dimensional carbon / boron-titanium dioxide composite oxide, specifically:

[0038] Add 150 mg Ti to 15 mL of deionized water 3 C 2 , after stirring evenly, first add 2mmol boric acid, then add 0.5mL hydrogen peroxide solution with a mass concentration of 30wt%, stir for 10min, transfer to a polytetrafluoroethylene-lined autoclave, and place it in a blast drying box. The thermal reaction is carried out at 160° C. for 8 hours. After the reaction, the product is washed, separated and dried to obtain a two-dimensional carbon / boron-titanium dioxide composite.

[0039] The SEM characterization of the as-synthesized 2D carbon / boron-titania composites is as follows: figure 1 shown in the figure 1 It can be seen that the composite has a two-dimensional layered structure; Figure 5A middle a, Figure 5B The XRD crystal form shown in a shows that the generated product contains anatase titanium dioxide and C; Figure 6A The XPS image in a shows tha...

Embodiment 2

[0043] A preparation method of two-dimensional carbon / boron-titanium dioxide composite oxide, specifically:

[0044] Add 180mg Ti to 15mL deionized water 3 C 2 , after stirring evenly, first add 6 mmol boric acid, then add 1 mL of hydrogen peroxide solution with a mass concentration of 30 wt %, stir for 30 min, transfer it to a polytetrafluoroethylene-lined high-pressure reaction kettle, and place it in a blast drying box hydrothermally The reaction is carried out at 180° C. for 12 hours. After the reaction, the product is washed, separated and dried to obtain a two-dimensional carbon / boron-titanium dioxide composite.

[0045] The SEM characterization of the as-synthesized 2D carbon / boron-titania composites is as follows: figure 2 shown, by figure 2 It can be seen that the composite has a two-dimensional layered structure; Figure 5A middle b. Figure 5B The XRD crystal form shown in b shows that the generated product contains anatase titanium dioxide and C; Figure 6A ...

Embodiment 3

[0049] A preparation method of two-dimensional carbon / boron-titanium dioxide composite oxide, specifically:

[0050] Add 210mg Ti to 15mL deionized water 3 C 2 , after stirring evenly, first add 10 mmol boric acid, then add 1.5 mL of hydrogen peroxide solution with a mass concentration of 30 wt %, stir for 50 min, transfer it to a polytetrafluoroethylene-lined autoclave, and place it in a blast drying box. The thermal reaction is carried out at 200° C. for 16 hours. After the reaction, the product is washed, separated and dried to obtain a two-dimensional carbon / boron-titanium dioxide composite.

[0051] The SEM characterization of the synthesized two-dimensional carbon / boron-titania composite oxide is as follows: image 3 shown, by image 3 It can be seen that the composite has a two-dimensional layered structure; Figure 5A middle c. Figure 5B The XRD crystal form shown in c shows that the generated product contains anatase titanium dioxide and C; Figure 6A The XPS im...

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Abstract

According to the two-dimensional carbon/boron-titanium dioxide composite oxide and the preparation method and application thereof, compared with the prior art, Ti3C2 serves as a precursor, boric acid serves as an inducer, hydrogen peroxide serves as an oxidizing agent, and the two-dimensional carbon/boron-titanium dioxide composite oxide is successfully constructed in situ through a boric acid induction hydrothermal method. According to the invention, the design and preparation of the element-doped oxide heterojunction (two-dimensional carbon/boron-titanium dioxide) supported by the two-dimensional layered material are realized; the whole operation is simple and controllable, the reaction condition is mild, the controllability and repeatability are good, the operation process is green and environment-friendly, and the production cost is low.

Description

technical field [0001] The invention belongs to the technical field of new energy functional materials, and in particular relates to a two-dimensional carbon / boron-titanium dioxide composite oxide, a preparation method thereof, and an application in photocatalytic hydrogen production. Background technique [0002] With the rapid development of the global economy, traditional fossil energy will not be able to meet future industrial needs. In order to solve this problem, it is imperative to develop renewable energy and clean energy. As a new type of energy, hydrogen is not only environmentally friendly, but also has a higher energy density than traditional fossil energy. In recent years, photocatalytic water splitting for hydrogen production has attracted extensive attention. [0003] TiO was first used by Fujishima and Honda in 1972 2 used as a photocatalyst. Since then, TiO 2 become the most promising catalyst in the field of photocatalysis. However, pure TiO 2 The in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J21/02B01J21/06B01J21/18B01J35/00B01J37/00B01J37/10B01J35/02B01J23/42C01B3/04
CPCB01J21/18B01J21/02B01J37/10B01J21/063B01J35/004B01J37/0009B01J23/42B01J35/026C01B3/042Y02E60/36
Inventor 杨仁春刘忠盈刘琪周艺海赵峰杨皖平庞雅慧花志雄郝贵平
Owner ANHUI UNIVERSITY OF TECHNOLOGY AND SCIENCE
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