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Catalyst for photocatalytic hydrogen production, and preparation method and application thereof

A catalyst and photocatalysis technology, applied in the direction of physical/chemical process catalysts, organic compounds/hydrides/coordination complex catalysts, chemical instruments and methods, etc., can solve problems such as poor photostability and easy photocorrosion, and achieve Large hydrogen production, improved stability, carrier splitting efficiency, and high hydrogen evolution rate

Active Publication Date: 2019-01-15
YANCHENG INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However Cu 2 The carriers of O are easier to recombine, and the photostability is poor, which is prone to photocorrosion. Therefore, the simple and effective method is used to modify Cu 2 O, comprehensively improving its stability and carrier separation efficiency is a necessary means to realize its practical application

Method used

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  • Catalyst for photocatalytic hydrogen production, and preparation method and application thereof
  • Catalyst for photocatalytic hydrogen production, and preparation method and application thereof
  • Catalyst for photocatalytic hydrogen production, and preparation method and application thereof

Examples

Experimental program
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Embodiment 1

[0040] (1) Synthesis of HKUST-1

[0041] 0.436g Cu(NO 3 ) 2 ·3H 2 O and 0.210g 1,3,5-benzenetricarboxylic acid are added in the mixed solvent (volume ratio is 1:1) of 12mL water / ethanol, stirred and reacted for 15 minutes, then the reaction solution is packed in the stainless steel reactor of 25mL, in The reaction was heated at 180° C. for 12 hours, and then naturally cooled to room temperature. The resulting cyan-blue precipitate HKUST-1 was separated by centrifugation, washed four times with deionized water, DMF and ethanol, respectively, and dried overnight at 65 °C.

[0042] (2) Preparation of catalyst

[0043] Firstly, HKUST-1 was exposed to argon atmosphere at 5°C min -1 The heating rate was increased to 300°C, 350°C, 400°C, 450°C and 500°C to heat it, then the argon flow was turned off, and HKUST-1 was exposed to the air, and kept under the corresponding heating temperature conditions for 1 hour respectively. The photocatalysts synthesized by heating at 300 °C, 35...

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Abstract

The invention discloses a catalyst for photocatalytic hydrogen production, and a preparation method and application thereof. The catalyst uses HKUST-1 as a precursor and is prepared by rapidly treating a sample through thermal decomposition in an argon atmosphere and an air atmosphere successively. The preparation method comprises the following steps: preparing HKUST-1 at first; and then heating the prepared HKUST-1 in the argon atmosphere to 300-500 DEG C, then maintaining the temperature, and carrying out a heating reaction in the air atmosphere for 0.5-2 h. A method for decomposing water toproduce hydrogen by using the catalyst for photocatalytic hydrogen production comprises the following steps: dispersing the photocatalyst in a mixed solution of water and a sacrificial reagent at first; removing air in a reaction system; and carrying out a reaction under visible light for 4-8 h, wherein the wavelength of the visible light ranges from 420 to 700 nm. The catalyst for photocatalytichydrogen production in the invention can generate hydrogen under the conditions of normal temperature, normal pressure and visible light, and has the characteristics of high catalytic activity and good hydrogen production stability; the raw materials of the catalyst are widely available and low in price; and the preparation method is simple in process and suitable for large-scale production.

Description

technical field [0001] The invention belongs to the field of photocatalyst preparation, and in particular relates to a photocatalytic hydrogen production catalyst and its preparation method and application. Background technique [0002] With the continuous consumption of global petrochemical resources, the continuous emission of CO 2 , SO x and NO x Toxic and harmful gases have seriously affected the global ecological environment, and extreme climates such as greenhouse effect and acid rain are severe, which will seriously endanger human survival in the long run; in addition, due to the non-renewability of resources such as oil and coal, the total global energy reserves is decreasing year by year, and important strategic resources such as oil are facing depletion. Therefore, in order to improve the global ecological environment and meet the strong demand for energy reserves in future development, it is imperative to find new clean alternative energy sources. Hydrogen, as...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/28C01B3/04
CPCC01B3/042B01J31/28C01B2203/0277C01B2203/1041B01J35/39Y02E60/36
Inventor 杨秀丽解明华阿玛雷·阿雷加希格·杜巴莱邵荣关荣锋侯贵华
Owner YANCHENG INST OF TECH
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