Preparation method of strontium titanate with adjustable strontium vacancy and application of strontium titanate in field of photocatalytic hydrogen production

A strontium titanate and photocatalytic technology, which is applied in the direction of titanate, titanium compounds, chemical instruments and methods, etc., can solve the problems of hindered application of photocatalytic technology, insufficient utilization of solar energy and recombination rate, and achieve less impurities, low cost, Good photocatalytic performance

Active Publication Date: 2021-03-12
NANCHANG HANGKONG UNIVERSITY
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Problems solved by technology

However, due to the insufficient utilization of solar energy by existing photocatalytic materials and the high recombination ra

Method used

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  • Preparation method of strontium titanate with adjustable strontium vacancy and application of strontium titanate in field of photocatalytic hydrogen production
  • Preparation method of strontium titanate with adjustable strontium vacancy and application of strontium titanate in field of photocatalytic hydrogen production
  • Preparation method of strontium titanate with adjustable strontium vacancy and application of strontium titanate in field of photocatalytic hydrogen production

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Example 1: Stir and dissolve 0.15 mol of citric acid and 35 ml of deionized water at room temperature, quickly add 0.05 mol of tetrabutyl titanate to the aqueous solution of citric acid, stir and dissolve on a thermal magnetic stirrer at 90°C until clear ; Add 0.045mol strontium acetate to the dissolved solution, add 34ml ethylene glycol after the strontium acetate is dissolved, and stir for 2 hours at 120°C on a thermal magnetic stirrer; place the solution in a porcelain crucible, cover the crucible, and send it into In the muffle furnace, set the heating conditions: the heating rate is 10°C / min, the constant temperature is 350°C for 1h, and after natural cooling, it is fully ground to obtain the strontium titanate photocatalyst precursor powder; take 4g of the strontium titanate precursor and place it in a porcelain crucible. Send it into a muffle furnace for high-temperature sintering, set the heating conditions: heating rate 10 ° C / min, 700 ° C constant temperature...

Embodiment 2

[0018] Embodiment 2: difference with embodiment 1 is: the strontium acetate content that adds is 0.040mol, makes strontium titanate sample (Sr 0.8 TiO 3 ).

Embodiment 3

[0019] Embodiment 3: difference with embodiment 2 is: the strontium acetate content that adds is 0.0475mol, makes pure strontium titanate sample (Sr 0.95 TiO 3 ).

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Abstract

The invention discloses a preparation method of strontium titanate with adjustable strontium vacancy and an application of strontium titanate in photocatalytic hydrogen production. Strontium titanatecrystals are prepared by a citric acid complexing method, a strontium titanate sample is obtained by calcining, strontium titanate with different strontium vacancy content is obtained by changing theuse amount of strontium acetate in the photocatalytic material provided by the invention, strontium vacancies are introduced into strontium titanate, so that the separation efficiency of photo-inducedelectrons and holes excited by the strontium titanate photocatalyst under an illumination condition is improved, the photocatalytic hydrogen production efficiency of the catalyst is improved, and thehydrogen production efficiency can be well improved when strontium titanate containing a proper amount of strontium vacancies is used for photocatalytic hydrogen production, the maximum average hydrogen production efficiency after illumination can reach 5.8202mmol/g, therefore thestrontium titanate catalyst has a potential application value for solving the problem of energy crisis and alleviatingthe lack of existing resources.

Description

technical field [0001] The invention relates to a preparation method of strontium titanate with adjustable strontium vacancies and its application in the field of photocatalytic hydrogen production. Background technique [0002] With the continuous growth of my country's economy and the increase of energy consumption, energy shortage and environmental pollution have become two major problems restricting the further development of my country's economy. The development of new clean energy and the control of environmental pollution have become the focus and focus of scientific research. Hydrogen energy, high combustion calorific value. The heat generated by burning the same mass of hydrogen is about 3 times that of gasoline, 9 times that of alcohol, and 4.5 times that of coke; hydrogen has good thermal conductivity, which is 10 times higher than that of most gases, and is an excellent heat transfer carrier ; The product of hydrogen combustion is water, and will not produce su...

Claims

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Application Information

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IPC IPC(8): C01G23/00B01J23/02B01J35/00C01B3/04
CPCC01G23/006B01J23/02B01J35/004C01B3/042Y02P20/133
Inventor 罗一丹韩玉薛名山谢宇殷祚炷洪珍谢婵陈亮
Owner NANCHANG HANGKONG UNIVERSITY
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