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SrTiO3/graphene composite catalyst as well as preparation method and application thereof

A graphene composite and catalyst technology, which is applied in the field of photocatalytic materials, can solve the problems of low catalytic efficiency and poor dispersion, and achieve the effects of high photocatalytic activity, easy-to-obtain raw materials, and simple preparation methods

Inactive Publication Date: 2016-08-03
WUHAN YUANFANG SCI & TECH CO LTD OF CHINA SANJIANG SPACE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In recent years, researchers have carried out a lot of research work on SrTiO3, but related patents and technologies have shortcomings such as low catalytic efficiency and poor dispersion.

Method used

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  • SrTiO3/graphene composite catalyst as well as preparation method and application thereof
  • SrTiO3/graphene composite catalyst as well as preparation method and application thereof
  • SrTiO3/graphene composite catalyst as well as preparation method and application thereof

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preparation example Construction

[0053] In the embodiment, the preparation of graphene oxide can be synthesized according to the improved humer method reported in the existing literature, and the preparation process is as follows:

[0054] 1) Mix 1g of natural graphite, concentrated H 2 S0 4 、H 3 P0 4 The three are placed in a three-necked flask, and concentrated H 2 S0 4 with H 3 P0 4 , with a volume ratio of 9:1, and added 6 g of potassium permanganate in portions, and stirred in an ice-water bath for 1 h;

[0055] 2) The temperature was raised to 50°C, and the temperature was kept for 12 hours;

[0056] 3) Pour the obtained product into ice water, add an appropriate amount of hydrogen peroxide while stirring until the color of the solution turns golden yellow, then filter, and wash the product with HCl (5% by volume) and distilled water until the pH value is close to 7. Finally, the obtained graphite oxide was dispersed in water, ultrasonicated for 8 hours, and dried in a vacuum oven to obtain grap...

Embodiment 1

[0058] A SrTiO 3 / graphene (0.5%) composite catalyst 1, it is prepared by the following steps:

[0059] Weigh 5 mg of graphite oxide prepared above, add 20 mL of ethanol to super-disperse for 20 minutes, and obtain a graphene oxide solution;

[0060] Weigh 1.87g of butyl titanate and add it to the above graphene oxide solution, then add 5ml of glacial acetic acid, stir and dissolve to obtain solution A;

[0061] Weigh 1.15g of strontium nitrate and add it into 30ml of deionized water, stir until dissolved by magnetic force to obtain solution B;

[0062] Add solution B dropwise to solution A under stirring state, and after stirring for 20 minutes, continue to ultrasonically disperse for 10 minutes to form a homogeneous sol.

[0063] In the state of stirring, add sodium hydroxide dropwise to the homogeneous sol, adjust the pH to 14, transfer it to a polytetrafluoroethylene-lined autoclave, and treat it at a constant temperature of 180 ° C for 4 hours, and finally at 80 ° C A...

Embodiment 2

[0067] The addition amount of graphene oxide sample described in embodiment 1 is changed to 10mg, other conditions are all identical with embodiment 1, marked as SrTiO 3 / graphene (1%), wherein the number 1% in the name represents that the mass ratio of graphene to strontium titanate is 0.01:1. For the reaction results obtained, see figure 2 , whose XRD characterization is as Figure 9 shown.

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Abstract

The invention discloses a SrTiO3 / graphene composite catalyst for photocatalytically decomposing water as well as a preparation method and application thereof. The SrTiO3 / graphene composite catalyst is prepared from SrTiO3 and graphene, wherein the SrTiO3 is loaded on the surface of the graphene. The preparation method of the catalyst comprises the following steps: firstly, adding tetrabutyl titanate into a graphene oxide dispersion solution; adding glacial acetic acid, and stirring and dissolving to obtain a solution A; weighing strontium nitrate and adding into de-ionized water, and stirring and dissolving to obtain a solution B; dropwise adding the solution B into the solution A and stirring uniformly; continually carrying out ultrasonic dispersion to form homogenized sol; adjusting the pH value to 13-14; and transferring the homogenized sol into a high-pressure reaction kettle, carrying out high-temperature treatment, and then cooling to obtain the SrTiO3 / graphene composite catalyst. The SrTiO3 / graphene composite catalyst integrates photocatalytic activity of SrTiO3, high specific surface area, chemical stability, and adsorption property of graphene, and high conducting property.

Description

technical field [0001] The present invention relates to a photocatalytic material, specifically a kind of SrTiO 3 / Graphene composite catalyst and preparation method and application. Background technique [0002] Coal, oil and natural gas are the traditional energy used by human beings. With the increase of human consumption, these non-renewable fossil energy will be exhausted in the foreseeable future. In addition, the traditional fossil energy produced in the process of A range of environmental issues. Therefore, it is imperative to seek an alternative energy source without harming the environment to maintain the sustainable development of human society. [0003] Hydrogen is a very clean energy source. Its combustion will only produce water and will not cause any harm to the environment. At the same time, it has a high calorific value and is regarded as an ideal alternative energy source. Solar energy is a clean and renewable energy, so it is of great significance to co...

Claims

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Application Information

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IPC IPC(8): B01J23/02C01B3/04
CPCC01B3/042B01J23/002B01J23/02B01J35/39Y02E60/36
Inventor 张全来李楠陈龙杨宏辉李伟邹云刘波余峰
Owner WUHAN YUANFANG SCI & TECH CO LTD OF CHINA SANJIANG SPACE GRP
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