Composite photocatalyst for splitting water to produce hydrogen under visible light and its preparation method

A technology for splitting water and visible light, applied in organic compound/hydride/coordination complex catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of narrow spectral response range, poor stability, and low hydrogen production rate and other problems, to achieve the effect of good monodispersity, good stability and high hydrogen production rate

Inactive Publication Date: 2011-11-30
HEILONGJIANG PATENT TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention is to solve the technical problems of poor stability, low hydrogen production rate and narrow spectral response range of the existing composite photocatalyst for splitting water to produce hydrogen under visible light, and to provide a composite photocatalyst for splitting water to produce hydrogen under visible light and its preparation method

Method used

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  • Composite photocatalyst for splitting water to produce hydrogen under visible light and its preparation method
  • Composite photocatalyst for splitting water to produce hydrogen under visible light and its preparation method
  • Composite photocatalyst for splitting water to produce hydrogen under visible light and its preparation method

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specific Embodiment approach 1

[0009] Specific implementation mode one: The composite photocatalyst of this embodiment for decomposing water to produce hydrogen under visible light is made of Zn(Ac) 2 2H 2 O, Cd(Ac) 2 2H 2 O, rare earth compounds and thioacetamide, in which Zn(Ac) 2 2H 2 O and Cd(Ac) 2 2H 2 The molar ratio of O is 1:1~2, Zn(Ac) 2 2H 2 The molar ratio of O and rare earth compound is 1:1.5~2.5, Zn(Ac) 2 2H 2 The molar ratio of O and thioacetamide is 1:0.008~0.075, and the rare earth compound is Ce(NO 3 ) 3 ·6H 2 O or La(NO 3 ) 3 ·6H 2 O.

[0010] In this embodiment, the coprecipitation-solvothermal method is used to synthesize a composite photocatalyst that decomposes water to produce hydrogen under visible light. The photocatalyst has a uniform particle size distribution, good monodispersity and small size, and the particle size is 80nm-100nm. ; The hydrogen production rate of the composite photocatalyst for splitting water to produce hydrogen under visible light in this embo...

specific Embodiment approach 2

[0011] Specific embodiment two: the difference between this embodiment and specific embodiment one is: Zn(Ac) 2 2H 2 O and Cd(Ac) 2 2H 2 The molar ratio of O is 1:1.1~1.9, Zn(Ac) 2 2H 2 The molar ratio of O and rare earth compound is 1:1.6~2.4, Zn(Ac) 2 2H 2 The molar ratio of O and thioacetamide is 1:0.009~0.074. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0012] Specific embodiment three: the difference between this embodiment and specific embodiment one is: Zn(Ac) 2 2H 2 O and Cd(Ac) 2 2H 2 The molar ratio of O is 1:1.5, Zn(Ac) 2 2H 2 The molar ratio of O and rare earth compound is 1:2.0, Zn(Ac) 2 2H 2 The molar ratio of O and thioacetamide is 1:0.04. Others are the same as in the first embodiment.

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Abstract

The invention discloses a composite photocatalyst for hydrogen production by hydrolysis in a visible light and a method for preparing the composite photocatalyst, relates to the composite photocatalyst for the hydrogen production by the hydrolysis and the method for preparing the composite photocatalyst, and solves the technical problems of poor stability of the conventional photocatalyst for thehydrogen production by the hydrolysis in the visible light, low hydrogen-producing speed rate and wide spectral response range. The composite photocatalyst is prepared by Zn(Ac)2.2H2O, Cd(Ac)2.2H2O, a rare earth compound and thioacetamide. The method comprises the following steps of: adding the Zn(Ac)2.2H2O, the Cd(Ac)2.2H2O and the rare earth compound into a solvent, and stirring at the temperature of 60 to 80 DEG C; adding the thioacetamide, continuously stirring to obtain a mixture, and adding the mixture into a reaction kettle for reaction; and cooling, washing and drying to obtain the composite photocatalyst. The hydrogen-producing speed rate of the composite photocatalyst is 360 to 640 mmol.h<-1>.g<-1>. The composite photocatalyst can be applied to hydrogen production by solar hydrolysis.

Description

technical field [0001] The invention relates to a photocatalyst for decomposing water to produce hydrogen and a preparation method thereof. technical background [0002] With the development of social economy and science and technology, human beings are paying more and more attention to energy and environmental issues. Developing clean and efficient new energy sources and solving energy shortages and environmental pollution have gradually become the core propositions of today's social development. h 2 It has high combustion value, non-toxic and odorless, and its combustion products are environmentally friendly. It is a renewable energy source that can be directly used as fuel for fuel cells to convert hydrogen energy into electrical energy. It is a new energy source with broad application prospects. Use solar energy to decompose water to produce hydrogen, convert solar energy with low energy density and strong dispersion into hydrogen energy, and then convert the generated ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/26C01B3/04
CPCY02E60/364Y02E60/36
Inventor 陈刚郝临星于耀光周彦松谈翔申造宇
Owner HEILONGJIANG PATENT TECH DEV
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