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Bismuth molybdate/titanium carbide heterojunction two-dimensional photocatalytic material as well as preparation method and application thereof

A photocatalytic material, titanium carbide technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve complex preparation methods of two-dimensional layered materials, catalytic Performance impact is large, harsh conditions and other issues, to achieve the effect of improving catalytic performance, inhibiting recombination, and accelerating separation

Active Publication Date: 2019-12-20
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, considering the unique two-dimensional structure of bismuth molybdate, the combination of two-dimensional bismuth molybdate and two-dimensional titanium carbide to construct a 2D / 2D bismuth molybdate / titanium carbide heterojunction is an effective way to suppress photogenerated electron-hole recombination. However, there are still some difficulties in constructing this new type of 2D / 2D bismuth molybdate / titanium carbide heterojunction: (1) the preparation method of two-dimensional layered materials is relatively complicated and time-consuming; (2) 2D / 2D The conditions required for the preparation method of bismuth molybdate / titanium carbide heterojunction are relatively harsh; (3) The mass ratio of the two components in the 2D / 2D bismuth molybdate / titanium carbide heterojunction has a great influence on the catalytic performance

Method used

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  • Bismuth molybdate/titanium carbide heterojunction two-dimensional photocatalytic material as well as preparation method and application thereof
  • Bismuth molybdate/titanium carbide heterojunction two-dimensional photocatalytic material as well as preparation method and application thereof
  • Bismuth molybdate/titanium carbide heterojunction two-dimensional photocatalytic material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A bismuth molybdate / titanium carbide heterojunction two-dimensional photocatalytic material comprises layered bismuth molybdate and titanium carbide nanosheets, and the layered bismuth molybdate is supported on the titanium carbide nanosheets.

[0038] In this embodiment, the mass ratio of titanium carbide nanosheets and layered bismuth molybdate in the bismuth molybdate / titanium carbide heterojunction two-dimensional photocatalytic material is 2:1000.

[0039] In this embodiment, the layered bismuth molybdate has a single-layer layered structure with a thickness of 1.02 nm; the thickness of titanium carbide nanosheets is 1.98 nm.

[0040] A preparation method of the bismuth molybdate / titanium carbide heterojunction two-dimensional photocatalytic material of the above-mentioned present embodiment, comprising the following steps:

[0041] (1) Preparation of titanium carbide nanosheets

[0042] (1.1) Accurately weigh 0.5g of titanium aluminum carbide and add it to the mi...

Embodiment 2

[0047] A bismuth molybdate / titanium carbide heterojunction two-dimensional photocatalytic material is basically the same as in Example 1, the only difference being that in the bismuth molybdate / titanium carbide heterojunction two-dimensional photocatalytic material in Example 2, the titanium carbide nanometer The mass ratio of flakes and layered bismuth molybdate is 5:1000.

[0048] A preparation method of the bismuth molybdate / titanium carbide heterojunction two-dimensional photocatalytic material in the above-mentioned present embodiment is basically the same as the preparation method in Example 1, the only difference is that the raw materials in the preparation method in Example 2 The dosage of the two-dimensional layered titanium carbide nanosheets is 0.0031 g.

[0049] The bismuth molybdate / titanium carbide heterojunction two-dimensional photocatalytic material prepared in Example 2 is named "5:1000 bismuth molybdate / titanium carbide".

Embodiment 3

[0051] A bismuth molybdate / titanium carbide heterojunction two-dimensional photocatalytic material is basically the same as in Example 1, the only difference being that in the bismuth molybdate / titanium carbide heterojunction two-dimensional photocatalytic material in Example 3, titanium carbide nanometer The mass ratio of flakes and layered bismuth molybdate is 10:1000.

[0052] A preparation method of the bismuth molybdate / titanium carbide heterojunction two-dimensional photocatalytic material in the above-mentioned present embodiment is basically the same as the preparation method in Example 1, the only difference is that the raw materials in the preparation method in Example 3 The dosage of the two-dimensional layered titanium carbide nanosheets is 0.0062 g.

[0053] The bismuth molybdate / titanium carbide heterojunction two-dimensional photocatalytic material prepared in Example 3 is named "10:1000 bismuth molybdate / titanium carbide".

[0054] figure 1 It is a transmissi...

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Abstract

The invention discloses a bismuth molybdate / titanium carbide heterojunction two-dimensional photocatalytic material as well as a preparation method and application thereof. The two-dimensional photocatalytic material includes titanium carbide nanosheets and layered bismuth molybdate supported on the titanium carbide nanosheets. The preparation method includes the following steps: preparing bulk titanium carbide; preparing the titanium carbide nanosheets by using dimethyl sulfoxide; and preparing the above two-dimensional photocatalytic material through a hydrothermal reaction. The two-dimensional photocatalytic material has the advantages of low costs, easy availability, low recombination efficiency of photoelectrons and holes, strong catalytic performance, good redox activity, and less harm to the environment, is a green and economic photocatalytic material, can be widely used to treat pollutants in the environment, and has higher use value and better application prospects; and the preparation method provided by the invention has the advantages of a simple process, convenient operation, low raw material costs, low energy consumption, short consumed time, mild easily controlled reaction conditions, greenness and environmental protection, and shows good application prospects in synthesis of functional nanomaterials.

Description

technical field [0001] The invention belongs to the technical field of functional nanometer materials, and relates to a bismuth molybdate / titanium carbide heterojunction two-dimensional photocatalytic material and a preparation method and application thereof. Background technique [0002] With the rapid development of industrialization, society's demand for fossil fuels is increasing, but the combustion of fossil fuels will produce a large number of pollutants, which pose a great threat to human health. At present, many methods (such as Fenton method, biological method, adsorption method and electrocatalytic method, etc.) have been developed to degrade these pollutants, and good results have been achieved. However, these methods have certain defects. Firstly, the mineralization efficiency of pollutants is low, and many pollutants are degraded to produce intermediate products, which still have strong toxicity; secondly, some methods require the input of external energy, which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/22B01J23/31C02F1/30C02F101/38C02F101/34
CPCB01J27/22B01J23/31B01J23/002C02F1/30C02F2101/38C02F2101/34C02F2305/10B01J35/23B01J35/39
Inventor 李必胜赖萃秦蕾曾光明刘希贵李玲符玉葵何江凡许辅杭王志红史晓勋
Owner HUNAN UNIV
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