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A kind of graphene perovskite composite photocatalytic hydrogen production catalyst and preparation method thereof

A perovskite and catalyst technology, applied in the field of graphene perovskite composite photocatalytic hydrogen production catalyst and its preparation, can solve the problems of complex process conditions, high cost, unsuitable for large-scale production, etc., and achieve good catalytic effect, Low cost and the effect of increasing photoactive sites

Active Publication Date: 2019-12-06
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the improved process conditions are complicated and costly, and are not suitable for large-scale production.

Method used

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  • A kind of graphene perovskite composite photocatalytic hydrogen production catalyst and preparation method thereof
  • A kind of graphene perovskite composite photocatalytic hydrogen production catalyst and preparation method thereof
  • A kind of graphene perovskite composite photocatalytic hydrogen production catalyst and preparation method thereof

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Effect test

preparation example Construction

[0033] The preparation method of the present invention is an improved sol-gel method, and a graphene-calcium titanate composite photocatalyst material is prepared. The catalyst has a good catalytic effect in the visible light catalytic decomposition of water to produce hydrogen; the basic experimental operation process: formaldehyde is used as As a sacrificial agent, disperse a catalyst with a mass ratio of 4g / L into an aqueous formaldehyde solution, pass nitrogen gas for about 15 minutes and seal it quickly, then place it in a lighting device, irradiate the reactor with visible light, take samples at regular intervals, and pass through a gas chromatograph The production of hydrogen gas was measured for quantitative analysis.

[0034] The preparation method of a graphene perovskite composite photocatalytic hydrogen production catalyst provided by the present invention comprises: weighing nitrate, tetrabutyl titanate and complexing agent and dissolving them in ethanol solution, ...

Embodiment

[0049] (1) Weigh 0.0411g of graphene powder and add it to 100ml of deionized water, and carry out ultrasonic dispersion for 1 hour to obtain a stable suspension; (2) Weigh 3.50683g of calcium nitrate and 5.10525g of tetrabutyl titanate according to the stoichiometric ratio and 0.06495g of lanthanum nitrate; (3) add 80ml of absolute ethanol to the weighed tetrabutyl titanate and stir to dissolve, the stirring temperature is 60°C; after obtaining a colorless and transparent solution, gradually add 12.6084g of lemon Acid chelating agent, carry out ultrasonic dispersion 10 minutes, obtain solution A; (4) add 5ml distilled water to dissolve to the calcium nitrate crystal that has weighed and lanthanum nitrate crystal, after obtaining colorless transparent solution, drip dropwise into In solution A, ultrasonically disperse for 10 minutes to obtain a mixed solution, then add graphene suspension; then stir the mixed solution in a constant temperature water bath at 60°C for 4 hours to o...

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Abstract

The invention discloses a preparation method of a graphene perovskite composite photocatalytic hydrogen production catalyst, which includes: weighing nitrate, tetrabutyl titanate and a complexing agent and dissolving them in an ethanol solution, adding graphene suspension, A mixed solution is prepared; the mixed solution is stirred until it turns into a dry gel; the dry gel is roasted to remove organic matter and then calcined in a vacuum to obtain the catalyst. The invention also discloses a graphene perovskite composite photocatalytic hydrogen production catalyst.

Description

technical field [0001] The invention relates to the field of composite material preparation and application, in particular to a graphene perovskite composite photocatalytic hydrogen production catalyst and a preparation method thereof. Background technique [0002] Nowadays, with the development of society, the demand for energy is increasing day by day, and coal, oil, natural gas and other traditional energy sources are not renewable, so the continuous exploitation of them will inevitably lead to an energy crisis and a series of chain problems. In addition, traditional energy combustion will produce a large amount of harmful gases such as carbon monoxide, carbon dioxide, sulfur dioxide and so on. In the living environment around us, one of the problems that attract our attention most today is the problem about smog. How to solve the smog and get blue skies requires fundamental governance. Industrial pollution, loose coal combustion, and vehicle exhaust are important man-m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/10B01J35/10C01B3/04
CPCC01B3/042B01J23/002B01J23/10C01B2203/1041B01J2523/00B01J35/61B01J35/39B01J2523/23B01J2523/3706B01J2523/47Y02E60/36
Inventor 徐虹单瑞平成荣敏
Owner JILIN UNIV
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