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CdS/MoO3 composite photocatalyst and preparation method thereof

A catalyst and composite light technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of inability to degrade organic pollutants, low activity, low hydrogen production rate, etc., and achieve uniform particle size. , the effect of high catalytic activity and low price

Inactive Publication Date: 2011-05-25
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the invention is to solve the existing problem of utilizing light to decompose H 2 O hydrogen production catalysts have low activity, low hydrogen production rate under visible light, and cannot degrade organic pollutants. A CdS / MoO 3 Composite photocatalyst and preparation method thereof

Method used

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  • CdS/MoO3 composite photocatalyst and preparation method thereof
  • CdS/MoO3 composite photocatalyst and preparation method thereof
  • CdS/MoO3 composite photocatalyst and preparation method thereof

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specific Embodiment approach 1

[0012] Specific implementation mode 1: CdS / MoO in this implementation mode 3 Composite photocatalyst composed of Cd(Ac) 2 2H 2 O, (NH 4 ) 6 Mo 7 o 24 4H 2 Made from O and thioacetamide; where (NH 4 ) 6 Mo 7 o 24 4H 2 O and Cd(Ac) 2 2H 2 The molar ratio of O is 0.1:1~3, Cd(Ac) 2 2H 2 The molar ratio of O to thioacetamide is 1:1.03-8.24.

[0013] The composite photocatalyst obtained in this embodiment is nano-spherical, the nano-sphere particle size is 300nm-350nm, and is self-assembled by small particles each particle size is 5-20nm, and the nano-spheres are evenly embedded with CdS nanocrystals.

specific Embodiment approach 2

[0014] Specific embodiment two: the difference between this embodiment and specific embodiment one is (NH 4 ) 6 Mo 7 o 24 4H 2 O and Cd(Ac) 2 2H 2 The molar ratio of O is 0.1:2, Cd(Ac) 2 2H 2 The molar ratio of O to thioacetamide is 1:5. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0015] Specific implementation mode three: CdS / MoO in this implementation mode 3 The preparation method of composite photocatalyst is as follows: one, weigh Cd(Ac) 2 2H 2 O, (NH 4 ) 6 Mo 7 o 24 4H 2 O and thioacetamide are then added to 5mL-20mL of acetone or ethanol solution to form a mixture, in which (NH 4 ) 6 Mo 7 o 24 4H 2 O and Cd(Ac) 2 2H 2 The molar ratio of O is 0.1:1~3, Cd(Ac) 2 2H 2 The molar ratio of O to thioacetamide is 1:1.03~8.24; 2. Seal the mixture obtained in step 1 and put it into an ultrasonic reactor, and react at 40°C~80°C for 0.5h~8h; 3. Put the mixture in step 1 The product obtained by the second reaction is cooled to room temperature, washed with absolute ethanol for 2 to 5 times, and then dried in an oven at 50°C for 0.5h to 5h to obtain a composite photocatalyst.

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Abstract

The invention discloses a CdS / MoO3 composite photocatalyst and a preparation method thereof, which relate to a catalyst material and a preparation method thereof. The catalyst solves the problems that the conventional hydrogen production by utilizing the light to decompose H2O is low in catalyst activity and hydrogen yield under visible light and cannot degrade organic pollutants. The CdS / MoO3 composite photocatalyst is prepared from Cd(Ac)2.2H2O, (NH4)6Mo7O24.4H2O and thioacetamide. The preparation method comprises the steps of: adding the Cd(Ac)2.2H2O, the (NH4)6Mo7O24.4H2O and the thioacetamide into solution of acetone or ethanol, sealing the obtained solution, then placing the obtained solution into an ultrasonic reactor to react, then cooling a product to room temperature, and then washing and drying to obtain the CdS / MoO3 composite photocatalyst. The composite photocatalyst is of nanosphere shapes, the particle size of the nanospheres is between 300 and 350nm, the composite photocatalyst is obtained by the self-assembling of each small particle with the particle size of between 5 and 20nm, and additionally, CdS nanocrystals are uniformly embedded in the nanospheres; and the catalyst is high in catalytic activity, and the hydrogen production rate can reach 2 to 5.25mmol / h.

Description

technical field [0001] The invention relates to a catalyst material and a preparation method thereof. Background technique [0002] Today, the world has paid great attention to energy and environmental issues. With the development of the economy, people's demand for non-renewable resources is increasing day by day. Fossil fuels can no longer meet people's demand for energy. At the same time, the over-exploitation of nature by humans has caused serious environmental pollution and environmental damage. The "greenhouse effect" and organic pollution caused by greenhouse gases such as carbon dioxide are becoming more and more serious, and the development of clean and efficient new energy is imminent. [0003] In 1972, Japanese scientists Fujishima and Honda discovered TiO 2 Under UV irradiation, the H 2 O decomposes into H 2 and O 2 . After more than 30 years of research, TiO 2 The research on photocatalysts has become mature, and its performance in the use of ultraviolet ...

Claims

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Application Information

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IPC IPC(8): B01J27/04
Inventor 陈刚申造宇于耀光郝临星周彦松谈翔
Owner HARBIN INST OF TECH
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