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Application of SrTiO3/Fe2O3 in hydrogen production through water photolysis

A technology for producing hydrogen and fe2o3 from water, which is applied in the production of metal/metal oxide/metal hydroxide catalysts, hydrogen, hydrogen, etc., can solve the problems of low separation efficiency of photogenerated charges and unsatisfactory utilization of visible light, and achieve good results UV-Vis absorbing ability, low cost, effect of improving efficiency

Inactive Publication Date: 2018-07-17
SHANDONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Among many catalysts, strontium titanate has become a very good choice for photocatalyst because of its stable properties and green environmental protection. However, its band gap is about 3.2eV, and its application to light is limited to the ultraviolet region. The utilization rate is unsatisfactory, and the separation efficiency of photogenerated charges after strontium titanate is excited by light is low, and there are not enough electrons accumulated on the surface of the material to participate in the photocatalytic hydrogen production reaction

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  • Application of SrTiO3/Fe2O3 in hydrogen production through water photolysis
  • Application of SrTiO3/Fe2O3 in hydrogen production through water photolysis
  • Application of SrTiO3/Fe2O3 in hydrogen production through water photolysis

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preparation example Construction

[0040]Further, the present invention provides one of the SrTiO 3 / Fe 2 O 3 The preparation method embodiment of , the concrete steps are as follows:

[0041] 1) The nanomaterial SrTiO 3 Disperse in ethanol solution and carry out ultrasonic dispersion treatment;

[0042] 2) adding a reducing agent to the above-mentioned dispersed solution, and ultrasonically reducing the high oxidation state of the reactant surface;

[0043] 3) Add nanoscale Fe to the solution after reduction 2 O 3 SrTiO is obtained by ultrasonication to make the reaction fully proceed, and then the reactant is centrifuged, washed and dried to obtain SrTiO 3 / Fe 2 O 3 ;

[0044] Wherein, in the step 1), SrTiO 3 The concentration configuration in ethanol solution is 0.1mg / ml; ultrasonic treatment conditions are: ultrasonic power 50W, ultrasonic 10min;

[0045] In described step 2), the reducing agent is sodium amalgam or sodium borohydride, more preferably sodium amalgam; ultrasonic treatment conditio...

Embodiment 1

[0063] (1) SrTiO 3 / Fe 2 O 3 2 mg of the composite material was dispersed and dissolved in 8 mL of purified water and 2 mL of methanol solution, and sealed in a 20-mL quartz bottle.

[0064] (2) ultrasonicate the solution in step (1) for 6 minutes at an ultrasonic power of 50W, so that the sample is uniformly dispersed in the solution; after the ultrasonic dispersion is completed, vacuumize the solution with a suction filtration pump, and the suction filtration time is 7 minutes; The solution is filled with nitrogen, the nitrogen pressure is 0.5Pa, the complete inflation time is 30s, and the charge-discharge balance time is 90s to ensure the balance of internal and external pressures.

[0065] (3) The above-mentioned quartz bottle containing the solution was installed in a photocatalytic reactor, irradiated under a 400W high-pressure mercury lamp, and the hydrogen production amount and rate were tested and compared after 6h of continuous irradiation respectively. SrTiO 3 / ...

Embodiment 2

[0067] (1) SrTiO 3 / Fe 2 O 3 2 mg of the composite material was dispersed and dissolved in 8 mL of purified water and 2 mL of EDTA-Na solution, and sealed in a 20 mL quartz bottle.

[0068] (2) ultrasonicate the solution in step (1) for 6 minutes at an ultrasonic power of 50W, so that the sample is uniformly dispersed in the solution; after the ultrasonic dispersion is completed, vacuumize the solution with a suction filtration pump, and the suction filtration time is 7 minutes; The solution is filled with nitrogen, the nitrogen pressure is 0.5Pa, the complete inflation time is 30s, and the charge-discharge balance time is 90s to ensure the balance of internal and external pressures.

[0069] (3) The above-mentioned quartz bottle containing the solution was installed in a photocatalytic reactor, irradiated under a 400W high-pressure mercury lamp, and the hydrogen production amount and rate were tested and compared after 6h of continuous irradiation respectively. SrTiO 3 / F...

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Abstract

The invention provides application of SrTiO3 / Fe2O3 in hydrogen production through water photolysis. The spectral absorption range is widened greatly by a photocatalysis composite material SrTiO3 / Fe2O3, the good ultraviolet / visible absorbing capability is achieved, and therefore the water photolysis hydrogen production efficiency is greatly improved; the water photolysis hydrogen production operation is easy, the cost is low, environmental protection is achieved, the repeatability is good, the efficiency is high, the good hydrogen production rate is achieved in different solutions, the universality and scale production value are obtained, and the wide application prospect is achieved.

Description

technical field [0001] The invention belongs to the field of photocatalytic composite materials, and relates to a photolysis water material SrTiO 3 / Fe 2 O 3 Application in the field of photocatalytic water splitting. Background technique [0002] In recent hundreds of years, with the rapid development of industrial science and technology, the excessive use of fossil fuels by humans has brought about two major problems of energy crisis and environmental pollution. It is urgent to find new clean and renewable energy sources. The combustion product of hydrogen is water, which is considered to be an ideal non-polluting green energy in the new century. Hydrogen does not exist in the atmosphere, but there is a large amount of hydrogen stored in water. At present, electrolysis of water is a common method to obtain hydrogen, but it needs a lot of electric energy and the cost is very high. Finding a convenient and inexpensive way to produce hydrogen has become a dream of energy...

Claims

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Application Information

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IPC IPC(8): B01J23/78C01B3/04
CPCC01B3/042B01J23/002B01J23/78B01J2523/00B01J35/39B01J2523/24B01J2523/47B01J2523/842Y02E60/36
Inventor 李志华马惠云李娜曹国炜郄元元
Owner SHANDONG NORMAL UNIV
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