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Preparation method of CdS-loaded MIL-101(Cr) hydrogen-production photocatalyst

A technology of photocatalyst and aqueous solution, which is applied in the direction of catalyst activation/preparation, organic compound/hydride/coordination complex catalyst, chemical instrument and method, etc. It can solve the problem of reducing surface area of ​​photogenerated electrons, hole recombination rate, easy agglomeration, etc. problem, achieve the effect of reducing photocorrosion phenomenon and improving photocatalytic activity

Inactive Publication Date: 2017-11-21
HARBIN UNIV OF SCI & TECH
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing pure CdS particle photocatalysts are easy to agglomerate to form large particles, thereby reducing the surface area and high photogenerated electrons and hole recombination rates, and provide a MIL-101 (Cr) loaded CdS Preparation method of photocatalyst for hydrogen production

Method used

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  • Preparation method of CdS-loaded MIL-101(Cr) hydrogen-production photocatalyst
  • Preparation method of CdS-loaded MIL-101(Cr) hydrogen-production photocatalyst
  • Preparation method of CdS-loaded MIL-101(Cr) hydrogen-production photocatalyst

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Embodiment 1

[0020] Example 1: The preparation method of a kind of MIL-101 (Cr) loaded CdS hydrogen production photocatalyst of the present embodiment is completed according to the following steps:

[0021] Step 1, the Cr(NO) of the terephthalic acid of 0.1656g and 0.3992g 3 ) 3 9H 2 O. 0.05mL of HF was added to distilled water, stirred with a glass rod for 3 minutes, then transferred to a high-temperature hydrothermal reaction kettle, reacted at 220°C for 8h, centrifuged to obtain a precipitate, and dried at 80°C to obtain 0.2g MIL-101(Cr);

[0022] Step 2: Put 0.2g of MIL-101(Cr) obtained in Step 1 into a round bottom flask and add 50mL of distilled water, then heat, stir, condense and reflux at 110°C in a constant temperature oil bath for 12h, centrifuge to obtain a precipitate, and dry at 80°C Finally, put MIL-101(Cr) into a round bottom flask and add 50mL of absolute ethanol, heat, stir, condense and reflux twice in a constant temperature oil bath at 80°C, each time for 12h; centrif...

Embodiment 2

[0026] The difference between this embodiment and Example 1 is: the Cd(AC) described in step 3 2 The concentration of the substance in the aqueous solution is 0.7mol / L, and the amount added is 0.15mL; Na described in step 3 2 The molar concentration of the S aqueous solution is 0.7mol / L, and the added amount is 0.15mL. Other steps and parameters are the same as in Example 1. A MIL-101(Cr)-supported CdS photocatalyst for hydrogen production was obtained with a mass fraction of MIL-101(Cr) of 85% and a mass fraction of CdS of 15%.

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Abstract

The invention relates to a preparation method of a CdS-loaded MIL-101(Cr) hydrogen-production photocatalyst, and particularly to a hydrogen-production catalyst preparation method. In the prior art, the existing CdS semiconductor photocatalyst is easily subjected to light corrosion, such that the compounding probability of the photo-generated electrons and the holes is high, and the utilization rate of the sunlight is low so as to provide the low photocatalytic hydrogen production rate. A purpose of the present invention is to solve the problem in the prior art. The preparation method comprises: 1, preparing a CdS-loaded MIL-101(Cr) hydrogen-production photocatalyst crude product; and 2, adding the CdS-loaded MIL-101(Cr) hydrogen-production photocatalyst crude product to a reaction kettle, and carrying out a hydrothermal reaction to obtain the CdS-loaded MIL-101(Cr) hydrogen-production photocatalyst. According to the present invention, the hydrogen peroxide decomposing hydrogen production rate of the CdS-loaded MIL-101(Cr) hydrogen-production photocatalyst can achieve 510.5 [mu]mol.h<-1>.g<-1>-586.1 [mu]mol.h<-1>.g<-1> under the irradiation of a 300 W xenon lamp; and the preparation method of the CdS-loaded MIL-101(Cr) hydrogen-production photocatalyst can be obtained.

Description

technical field [0001] The invention relates to a preparation method of a hydrogen production catalyst. Background technique [0002] The growing energy crisis, environmental pollution caused by fossil fuel combustion has led to an active search for renewable energy and environmentally friendly alternative energy sources. Hydrogen, as the next generation of energy, has attracted countless scientists to reveal and utilize it due to its high energy efficiency, environmental friendliness, and recyclable characteristics. In the early days, people usually used non-renewable resources to obtain hydrogen, but this method inevitably led to environmental pollution and burning of fossil fuels, which violated our original intention. Inspired by photosynthesis in nature, people pursue the use of sunlight as an energy source, and then use photocatalysts to split water to convert solar energy into hydrogen energy. At present, semiconductor photocatalytic materials are more researched in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/26B01J37/10C01B3/04
CPCC01B3/042B01J31/26B01J37/10C01B2203/1082B01J35/39Y02E60/36
Inventor 孙晓君孟祥斌
Owner HARBIN UNIV OF SCI & TECH
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