Preparation method of cuprous oxide and tritanium dicarbide heterojunction composite material and application thereof for photocatalytic reduction of carbon dioxide

A technology of trititanium dicarbide and cuprous oxide, which is applied in the directions of carbon monoxide, catalyst activation/preparation, chemical instruments and methods, etc., can solve the problems of low reduction potential and limited catalytic activity.

Inactive Publication Date: 2019-08-23
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, scientists have developed a variety of CO 2 Reduced photocatalysts such as metal oxides (ZnO, TiO 2 , Bi 2 o 3 ) and sulfides (ZnIn 2 S 4 ), layered dou...

Method used

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  • Preparation method of cuprous oxide and tritanium dicarbide heterojunction composite material and application thereof for photocatalytic reduction of carbon dioxide
  • Preparation method of cuprous oxide and tritanium dicarbide heterojunction composite material and application thereof for photocatalytic reduction of carbon dioxide
  • Preparation method of cuprous oxide and tritanium dicarbide heterojunction composite material and application thereof for photocatalytic reduction of carbon dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1. Etching Ti by HF method 3 AlC 2 , the specific method is: weigh 3g Ti 3 AlC 2 The powder was slowly added to a polytetrafluoroethylene beaker containing 60ml 40% HF solution under magnetic stirring, a small amount several times, and the adding time lasted half an hour to prevent the temperature of the solution from overheating, and the reaction time at room temperature continued for 48h. After the reaction, the black suspension was repeatedly centrifuged with deionized water until the pH was close to neutral, and then put into an oven to dry the sample.

[0026] 2. Carry out peeling treatment to the bulk phase titanium dioxide carbide obtained in step 1, and the specific method of stripping titanium dioxide titanium carbide is as follows: dissolve titanium dioxide titanium carbide powder in 100ml of DMSO solution, and the magnetic stirring time lasts for 24h, and the The way to get solid three titanium carbide again. Weigh 0.1 g of the above-mentioned solid triti...

Embodiment 2

[0031] Weigh 1g of copper acetate and 1.8g of glucose and dissolve them in 75ml of deionized water, and then mix them evenly with the solution of titanium dioxide titanium carbide ultrathin nanosheets obtained in step 2 of 5ml of Example 1, and the other steps are the same as in Example 1 to obtain The catalyst is recorded as CuTi-5.

[0032] The preparation of the CuTi-5 thin film is the same as in Example 1.

[0033] Test CuTi-5 Photoreduction of CO 2 The catalytic performance is the same as that of Example 1.

Embodiment 3

[0035] Weigh 1g of copper acetate and 1.8g of glucose and dissolve them in 70ml of deionized water, and then mix them evenly with 10ml of trititanium carbide ultrathin nanosheet solution. The other steps are the same as in Example 1, and the obtained catalyst is designated as CuTi-10 .

[0036] The preparation of CuTi-10 film is the same as that in Example 1.

[0037] Test CuTi-10 Photoreduction of CO 2 The catalytic performance is the same as that of Example 1.

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Abstract

The invention discloses a preparation method of a cuprous oxide and tritanium dicarbide heterojunction composite material and application thereof for photocatalytic reduction of carbon dioxide. The preparation method comprises the following steps: etching Ti3AlC2 with HF (Hydrofluoric Acid) to prepare tritanium dicarbide; preparing tritanium dicarbide nanosheets in a DMSO (Dimethylsulfoxide) stirring and ultrasonic mode; and carrying out in-situ growth on Cu2O on the tritanium dicarbide nanosheets under a hydrothermal condition, thereby obtaining the cuprous oxide and tritanium dicarbide heterojunction composite material. By adopting the preparation method, a Cu2O/MXene heterojunction composite material is prepared for a first time, the composite material is used as a photocatalyst for simulating CO2 reduction under radiation of an xenon lamp, and due to dense contact of hexagram-shaped Cu2O with two-dimensional MXene nanosheets, not only is the conductivity of the catalyst improved, but also the separation efficiency of electron holes is improved, and the optical absorption and the photocatalytic activity of Cu2O are improved.

Description

technical field [0001] The invention belongs to the technical field of preparation of heterojunction photocatalysts, and in particular relates to a method for preparing a cuprous oxide and trititanium carbide heterojunction composite material and its application for photocatalytic reduction of carbon dioxide. Background technique [0002] In recent years, the massive combustion of traditional fossil energy has led to a series of serious problems such as energy shortage, environmental pollution and global warming, which are constantly affecting people's production and lifestyle. Carbon dioxide, one of the leading greenhouse gases responsible for global warming and sea level rise, has seen its concentration increase from 280ppm to 406ppm between 1750 and early 2017. To alleviate this dilemma, researchers worldwide have devoted enormous efforts to converting CO2 into hydrocarbons or other carbon-based chemicals such as carbon monoxide, methane, and methanol, thereby further uti...

Claims

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Application Information

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IPC IPC(8): B01J27/22B01J37/34B01J37/10B01J35/10C07C1/12C07C9/04C01B32/40
CPCB01J27/22B01J35/004B01J35/1004B01J37/10B01J37/343C01B32/40C07C1/12C07C9/04
Inventor 陆军施晶晶李延梅
Owner BEIJING UNIV OF CHEM TECH
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