Calcium-titanium composite material as well as preparation method and application thereof

A composite material, perovskite technology, applied in the field of photoactive materials, can solve the problems of low infrared light water splitting efficiency, high energy consumption, high titanium content and other problems of perovskite composite materials, which is beneficial to commercial production and industrial application, Effects of energy consumption reduction and titanium content reduction

Active Publication Date: 2020-10-20
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Although the above-mentioned documents provide some methods for preparing perovskite composite materials, there are still some problems that high-temperature heat treatment is required in the preparation process, which consumes a lot of energy, takes a long time to prepare, and has a high titanium content in the product. The cost of the preparation process is high, and the band gap energy of the product perovskite material is not easy to control, and the efficiency of the prepared perovskite composite material to catalyze visible light and / or infrared light to split water is low; therefore, the cost of developing a preparation process is low , The preparation method of perovskite composite materials with easy-to-adjust product bandgap energy is still of great significance

Method used

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  • Calcium-titanium composite material as well as preparation method and application thereof
  • Calcium-titanium composite material as well as preparation method and application thereof
  • Calcium-titanium composite material as well as preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0077] Preparation method of calcium titanium composite material:

[0078] (1) Under the condition of 16° C., 5 g of calcium source powder was dispersed in 50 mL of water by stirring to obtain a suspension of calcium source powder, and the calcium source was calcium carbonate;

[0079] (2) The glass bottle that titanium tetrachloride liquid is housed is connected on the glass bottle that the suspension of calcium source powder is housed by plastic pipe, the reaction time of the suspension of the calcium source powder of control titanium tetrachloride steam and stirring 10min;

[0080] (3) After the reaction time finishes, disconnect the pipeline that feeds titanium tetrachloride, add the CaCl that forms in the sodium hydroxide neutralization suspension 2 , until the pH of the suspension is 9-10;

[0081] (4) The product of step (3) is filtered and washed with water until it does not contain Cl - , and then dried at 60° C. for 4 hours to obtain the perovskite composite mater...

Embodiment 2

[0083] Preparation method of calcium titanium composite material:

[0084] (1) Under the condition of 16° C., 5 g of calcium source powder was dispersed in 50 mL of water by stirring to obtain a suspension of calcium source powder, and the calcium source was calcium carbonate;

[0085] (2) The glass bottle that titanium tetrachloride liquid is housed is connected on the glass bottle that the suspension of calcium source powder is housed by plastic pipe, the reaction time of the suspension of the calcium source powder of control titanium tetrachloride steam and stirring 10min;

[0086] (3) After the reaction time finishes, disconnect the pipeline that feeds titanium tetrachloride, add the CaCl that forms in the sodium carbonate neutralization suspension 2 , until the pH of the suspension is 9-10;

[0087] (4) The product of step (3) is filtered and washed with water until it does not contain Cl - , and then dried at 60° C. for 4 hours to obtain the perovskite composite mater...

Embodiment 3

[0089] In this embodiment, the calcium source in Example 1 is replaced by calcium oxide, and other conditions are completely the same as those in Example 1.

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Abstract

The invention relates to a calcium-titanium composite material as well as a preparation method and application thereof. The calcium-titanium composite material with a titanium content of 0.5-5.5% is prepared through a one-step synthesis method. Compared with an existing calcium titanate photocatalyst material, the titanium content is obviously reduced, a high-temperature calcination treatment is not needed in the preparation process, the energy consumption is reduced, auxiliaries such as a guiding agent and a complexing agent do not need to be added in the preparation process, and the preparation cost is further reduced. The band gap energy of the prepared product can be effectively adjusted by the method, so that the controllability of the preparation process is improved.

Description

technical field [0001] The invention relates to the field of photoactive materials, in particular to a perovskite composite material and its preparation method and application. Background technique [0002] Photocatalysis and photocatalytic materials play an important role in current scientific and technological and industrial applications due to their better energy saving and environmental benefits. With the energy consumption brought about by population growth and industrial activities such as large-scale modernization, fossil fuels are the main energy providers. In addition to the concern of resource depletion, there are also environmental pollution problems. The combustion of fossil fuels will produce carbon, nitrogen and sulfur, etc. Pollutants; in order to reduce or eliminate these problems, it is urgent to explore new ways of energy production to replace fossil fuels. [0003] Photocatalytic materials are a class of semiconductors with electron mobility between condu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/232B01J23/02C01B3/04
CPCB01J27/232B01J23/02B01J35/004C01B3/042Y02E60/36
Inventor 莫森·谢哈塔·莫斯塔法·默罕默德陈岚葛广路张睿毅默罕默德·埃尔·赛义德·阿布德·埃尔萨拉姆
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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