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Photocatalyst for photocatalytic water splitting as well as preparation method and application thereof

A photocatalyst and water splitting technology, applied in physical/chemical process catalysts, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of high price, high cost, and limit the practical application of photocatalytic hydrogen production, and achieve high hydrogen production Activity, effect of reducing catalytic cost

Active Publication Date: 2019-08-30
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the biggest problem with the use of noble metal co-catalysts is the high price, which limits the practical application of photocatalytic hydrogen production.

Method used

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  • Photocatalyst for photocatalytic water splitting as well as preparation method and application thereof
  • Photocatalyst for photocatalytic water splitting as well as preparation method and application thereof
  • Photocatalyst for photocatalytic water splitting as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] This implementation provides an N-d-Ti 3 C 2 / g -C 3 N 4 The preparation method of composite photocatalyst, this preparation method specifically comprises the following steps:

[0059] Step 1: Take 3g of the reaction raw material titanium aluminum carbon and place it in the lining of a polytetrafluoro reactor, treat it with 20mL of concentrated hydrofluoric acid (40wt%) at room temperature for 72h, seal the reaction vessel and place it in a fume hood. After the reaction, let it stand for 1 hour, pour off the supernatant liquid slowly, and then use distilled water at a rotation speed of 10000r / min and centrifuge for 10 minutes to wash 5-6 times until the solution is about neutral. Finally, take the precipitate and dry it in vacuum at 60°C for 24 hours to obtain a dry black powder that is multilayer Ti 3 C 2 .

[0060] Step 2: Weigh 1g of the multilayer Ti prepared in the previous step 3 C 2 , placed in a small porcelain boat, and roasted in a tube furnace with am...

Embodiment 2

[0064] With the N-d-Ti of embodiment 1 3 C 2 / g -C 3 N 4 The evaluation experiment of photocatalytic water splitting hydrogen production activity was carried out for the catalyst, and the evaluation experiment was carried out in the following way:

[0065] 50mg catalyst N-d-Ti 3 C 2 / g -C 3 N 4 , 10 mL of sacrificial reagent triethanolamine and 90 mL of distilled water were added to the quartz reactor. When preparing to start the reaction, connect the reactor to the device, apply high-vacuum silicone grease to increase air tightness, and first vacuumize the reactor to ensure that the system does not contain air during the reaction. Turn on the circulating cooling water device and set the temperature to 3 °C. At the same time, turn on the carrier gas argon, set the temperature and current conditions of the gas chromatograph, and wait for the baseline to level off. When the temperature of the cooling water reaches the standard, the vacuum of the system is completed and ...

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Abstract

The invention provides a photocatalyst for photocatalytic water splitting as well as a preparation method and application thereof. The preparation method comprises the following steps: preparing accordion-shaped multi-layered Ti3C2; preparing nitrogen doped Ti3C2; preparing few layer nitrogen doped Ti3C2; preparing graphite phase carbon nitride g-C3N4; and compounding the g-C3N4 with the few layernitrogen doped Ti3C2 to obtain the compound photocatalyst N-d-Ti3C2 / g-C3N4. The compound catalyst prepared with the preparation method can catalyze a reaction of hydrogen making by photodecompositionof water, and has relatively high hydrogen making activity.

Description

technical field [0001] The invention relates to a method for preparing a catalyst, in particular to a method for preparing a photocatalyst for photocatalytically decomposing water, and belongs to the technical field of catalyst preparation. Background technique [0002] In recent years, energy issues and environmental issues have become the key to restricting my country's economic development. The use of traditional fossil energy emits a large amount of greenhouse gases and toxic gases, threatening the living environment of human beings. In addition, although the reserves of fossil energy such as coal, oil and natural gas are large, they are also limited. Therefore, it is a must to develop new clean and renewable energy. Grand strategic puzzle. Photocatalytic water splitting hydrogen production technology, which can use the nearly inexhaustible solar energy to convert water into clean energy hydrogen, and realize the conversion of solar energy into chemical energy, is a ver...

Claims

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Application Information

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IPC IPC(8): B01J27/24C01B3/04
CPCB01J27/24C01B3/042B01J35/39Y02E60/36
Inventor 王雅君姜桂元耿周靓刘萌萌李宇明奚晓旭徐春明赵震
Owner CHINA UNIV OF PETROLEUM (BEIJING)