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Preparation of (C5H5) Ru/TiO2 organic-inorganic hybrid photocatalyst

A photocatalyst and photocatalytic technology, which is applied in the field of photocatalysis, can solve the problems of low utilization rate of sunlight, limited development, high energy consumption, etc., and achieve the effect of improving photocatalytic efficiency, alleviating energy crisis, and being simple and easy to operate

Inactive Publication Date: 2016-02-10
FUZHOU UNIV
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Problems solved by technology

Carbon dioxide methanation can not only prepare methane with important application value, but also realize the conversion of carbon dioxide. It is an important type of catalytic reaction. However, the traditional thermal catalytic chemical synthesis process has the disadvantages of high energy consumption, unclear by-products, and environmental pollution. The problem of corrosion equipment, in today's society where environmental problems and energy problems are becoming more and more prominent, its development is greatly restricted
[0009] (1) Using unmodified titanium dioxide as a photocatalyst only responds to ultraviolet light, so the utilization rate of sunlight is low
[0010] (2) Using modified titanium dioxide with a certain amount of organometallic ruthenium on its surface as a photocatalyst can absorb and utilize visible light, but its quantum efficiency under visible light is still low

Method used

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  • Preparation of (C5H5) Ru/TiO2 organic-inorganic hybrid photocatalyst

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Effect test

Embodiment 1

[0039] Weigh 1 gram of commercial titanium dioxide (TiO 2 ) placed in a Pyrex glass reactor, calcined in an oxygen atmosphere at 250 degrees Celsius for 0.5 hours, and then the device was connected to a high vacuum device, and the high vacuum (10 -1 Pa) for 0.5 h and cooled to room temperature. In an anhydrous and oxygen-free glove box, a certain amount of ruthenocene was dissolved in n-hexane to obtain a ruthenocene solution with a concentration of 10 mg / ml in n-hexane. Next, in the glove box, take 0.3 ml of the prepared ruthenocene solution in n-hexane with a syringe, and inject it into the Pyrex glass reactor. The Pyrex glass reactor was then placed on a tube furnace heated to 100°C and maintained for 10 hours, after which a high vacuum was applied at this temperature for 10 -1 Pa treated 0.5 hour and was cooled to room temperature, and the massfraction that obtained ruthenium was the dicyclopentadienyl ruthenium grafted titanium oxide (CpRu) of 0.3%. 0.3 / TiO 2 )Materi...

Embodiment 2

[0041] Weigh 1 gram of commercial titanium dioxide (TiO 2 ) placed in a Pyrex glass reactor, calcined in an oxygen atmosphere at 400 degrees Celsius for 10 hours, and then the device was connected to a high vacuum device, and the high vacuum (10 -2 Pa) for 2 hours and cooled to room temperature. In an anhydrous and oxygen-free glove box, a certain amount of ruthenocene was dissolved in n-hexane to obtain a ruthenocene solution with a concentration of 10 mg / ml in n-hexane. Next, in the glove box, take 0.6 ml of the prepared ruthenocene solution in n-hexane with a syringe, and inject it into the Pyrex glass reactor. The Pyrex glass reactor was then placed on a tube furnace heated to 150°C and maintained for 24 hours, after which it was subjected to high vacuum at this temperature for 10 -2 Handle 2 hours and cool to room temperature, obtain the massfraction of ruthenium as the dicyclopentadienyl ruthenium grafted titanium oxide (CpRu) of 0.6% 0.6 / TiO 2 )Material. Weigh 10 ...

Embodiment 3

[0043] Weigh 1 gram of commercial titanium dioxide (TiO 2 ) placed in a Pyrex glass reactor, calcined in an oxygen atmosphere at 500 degrees Celsius for 20 hours, and then the device was connected to a high vacuum device, and the high vacuum (10 -4 Pa) for 4 hours and cooled to room temperature. In an anhydrous and oxygen-free glove box, a certain amount of ruthenocene was dissolved in n-hexane to obtain a ruthenocene solution with a concentration of 10 mg / ml in n-hexane. Next, in the glove box, take 1 ml of the prepared ruthenocene solution in n-hexane with a syringe, and inject it into the Pyrex glass reactor. The Pyrex glass reactor was then placed on a tube furnace heated to 180°C and maintained for 40 hours, after which it was subjected to high vacuum at this temperature for 10 -4 Pa treated 4 hours and was cooled to room temperature, and the massfraction that obtained ruthenium was 1% dicyclopentadienyl ruthenium grafted titanium oxide (CpRu 1.0 / TiO 2 )Material. We...

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Abstract

The invention discloses preparation of a (C5H5) Ru / TiO2 organic-inorganic hybrid photocatalyst, and an application of preparing methane solar fuel by performing photocatalytic reduction on carbon dioxide. According to the invention, a surface organometallic chemistry method is adopted, and dicyclopentadiene-based ruthenium is grafted to the surface of the titanium dioxide by adopting a surface grafting method to obtain a composite material having a similar semi-sandwich structure, wherein the mass percentage of ruthenium is 0.3-5.0%. Compared with dicyclopentadiene-based ruthenium-unmodified titanium dioxide, the (C5H5) Ru / TiO2 composite material prepared by adopting the method not only has relatively wide photoresponse range, but also photon-generated carriers can fast migrate and transmit as surface Ru-O-Ti keys are generated, and therefore, the photocatalytic efficiency of titanium dioxide in a carbon dioxide methanation process can be effectively improved. The method is simple and easy to operate, and has promotion significance on energy crisis mitigation and ecological environment improvement.

Description

technical field [0001] The invention belongs to the field of photocatalysis, in particular to a kind of (C 5 h 5 )Ru / TiO 2 Preparation of organic-inorganic hybrid photocatalyst and its application in photocatalytic reduction of carbon dioxide to methane solar fuel. Background technique [0002] Since the 21st century, the country has developed rapidly and the national demand has continued to rise. However, the unbalanced rapid development and excessive demand inevitably lead to aggravating energy and environmental problems. The energy structure problem that our country is currently facing is the main reason - the energy structure based on coal, oil and other traditional energy sources is distributed in the process of modernization and development with the rapid expansion of energy demand. On the one hand, it cannot meet the needs of development. On the other hand, It will cause environmental pollution, resource destruction, imbalance and other problems. Therefore, it is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/38C07C1/12C07C9/04
Inventor 龙金林黄皓玮王绪绪林华香张子重
Owner FUZHOU UNIV
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