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Method for preparing ZnS mischcrystal photocatalyst

A photocatalyst and solid solution technology, applied in chemical instruments and methods, physical/chemical process catalysts, hydrogen production, etc., can solve the problems of low hydrogen production rate, achieve low cost, high utilization efficiency of visible light, and simple preparation process Effect

Inactive Publication Date: 2009-05-20
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the invention is in order to solve existing photolysis H 2 The problem of low hydrogen production rate of O hydrogen production catalyst under visible light, and a preparation method of ZnS solid solution photocatalyst is provided

Method used

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  • Method for preparing ZnS mischcrystal photocatalyst
  • Method for preparing ZnS mischcrystal photocatalyst
  • Method for preparing ZnS mischcrystal photocatalyst

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specific Embodiment approach 1

[0008] Specific embodiment one: the preparation method of the ZnS solid solution photocatalyst of the present embodiment is realized according to the following steps: one, the Zn(AC) of 0.8~2.1mmol 2 2H 2 O and 0.1 to 0.7 mmol of the third main group compound were added to 20 to 30 mL of pyridine, and stirred for 1 to 2 hours; 2. Add 5.4 to 32.4 mmol of thioacetamide to the mixed solution prepared in step 1, and then stirred for 10 to 30min; 3. Under stirring conditions, add 0.3-4.8mL transition metal salt pyridine solution with a molar concentration of 0.04mol / L dropwise to the mixed solution prepared in step 2; 4. Pour the mixed solution prepared in step 3 into the reaction kettle , react at 120-240°C for 8-48h, then cool to room temperature, wash with absolute ethanol for 3-5 times, and then dry at 50°C for 0.5-3h to obtain a ZnS solid solution photocatalyst; The three main group compounds are InCl 3 4H 2 O or GaCl 3 ; The transition metal salt in step three is AgNO 3 ...

specific Embodiment approach 2

[0010] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the stirring time in Step 1 is 1 h. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0011] Embodiment 3: The difference between this embodiment and Embodiment 1 is that the stirring time in Step 1 is 2 hours. Other steps and parameters are the same as those in Embodiment 1.

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Abstract

The invention provides a method for preparing a ZnS sosoloid photocatalyst, which relates to a method for preparing a photocatalyst. The invention solves the problem of low hydrogen yield under visible light in the prior photocatalyst preparation by photolysis of H2O. The preparation method comprises: first, adding Zn (AC)2.2H2O and a III compound to pyridine to stir; secondly, adding thiacetamide to the mixture to stir; thirdly, dropping a transition metal salt pyridine solution to the mixture; fourthly, reacting at a temperature of between 120 and 240 DEG C for 8 to 48 hours, and cooling, washing and drying the reactant to obtain the ZnS sosoloid photocatalyst. The ZnS sosoloid photocatalyst prepared by the method has high hydrogen production velocity and good catalytic activity without carrying noble metals, such as Pt. The method has the advantages of low energy consumption, high visible light utilization ratio, simple preparation process and low cost.

Description

technical field [0001] The invention relates to a preparation method of a photocatalyst. Background technique [0002] Solar energy is a renewable and clean energy, but solar energy cannot be stored directly, nor can it be continuously supplied. Use solar energy to decompose water, convert solar energy with low density and strong dispersion into hydrogen energy, and then convert the generated H through fuel cells 2 and O 2 The electrochemical reaction is carried out to generate electricity; the product water can be used as a raw material for solar hydrogen production without any pollution to the environment. Since visible light accounts for about 43% of the total energy of sunlight, the development of new photocatalytic materials with visible light response and high catalytic activity is the key to utilizing solar energy and realizing photocatalytic water splitting to produce hydrogen. Solid solutions account for the majority of recently reported photocatalysts with excel...

Claims

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Application Information

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IPC IPC(8): B01J27/04C01B3/04
CPCY02E60/364Y02E60/36
Inventor 陈刚李英宣申造宇王旭周安坤
Owner HARBIN INST OF TECH
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