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Preparation method of hydrogen tungsten bronze/cadmium sulfide composite photocatalyst

A technology of hydrogen tungsten bronze and composite light, which is applied in the field of photocatalysis to achieve the effect of low preparation process requirements, convenient operation, and high-efficiency photocatalytic hydrogen production effect

Inactive Publication Date: 2018-06-19
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the co-catalysts used to construct CdS composite photocatalysts mainly include some noble metals, graphene and transition metal chalcogenides, but there is no public report on the combination of tungsten bronze as a co-catalyst and CdS for water splitting under visible light.

Method used

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  • Preparation method of hydrogen tungsten bronze/cadmium sulfide composite photocatalyst
  • Preparation method of hydrogen tungsten bronze/cadmium sulfide composite photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Weigh 200mg WCl 6 , added to 50mL of n-propanol, kept at 120°C for 24 hours, washed with ethanol and water, and dried to obtain W 18 o 49 ; Weigh the income W 18 o 49 40mg, dispersed in 60mL H 2 In O, add 1.48g of cadmium acetate and 0.8g of thiourea, incubate and react in a water bath at 80°C for 30 minutes to obtain W 18 o 49 / CdS; take 200mgW 18 o 49 / CdS, added to the mixed solution of 90mL water and 10mL lactic acid, and then irradiated for 1h to obtain H 0.53 WO 3 / CdS complex.

Embodiment 2

[0018] Weigh 200mg WCl 6 , added to 50mL of n-propanol, kept at 180°C for 20 hours, washed with ethanol and water, and dried to obtain W 18 o 49 ; Weigh the income W 18 o 49 80mg, dispersed in 60mL H 2 In O, add 1.48g of cadmium acetate and 0.8g of thiourea, and incubate in a water bath at 85°C for 60 minutes to obtain W 18 o 49 / CdS; take 300mgW 18 o 49 / CdS, add 90mL water and 10mL lactic acid to the mixed solution, then light for 0.5h, get H 0.53 WO 3 / CdS complex.

Embodiment 3

[0020] Weigh 200mg WCl 6 , added to 50mL of n-propanol, and reacted at 200°C for 20 hours, washed with ethanol and water, and dried to obtain W 18 o 49 ; Weigh the income W 18 o 49 60mg, dispersed in 80mL H 2 In O, add 2.96g of cadmium acetate and 1.6g of thiourea, and keep it in a water bath at 85°C for 30 minutes to obtain W 18 o 49 / CdS; take 500mgW 18 o 49 / CdS, add 90mL water and 10mL lactic acid to the mixed solution, then light for 0.5h, get H 0.53 WO 3 / CdS complex.

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Abstract

The invention discloses a preparation method of a hydrogen tungsten bronze / cadmium sulfide composite photocatalyst. The preparation method comprises the following steps: preparing W18O49 through a solvothermal reaction with WCl6 as a precursor and n-propanol as a solvent; adding cadmium acetate and thiourea, and performing a water bath reaction to obtain W18O49 / CdS; and performing in-situ photoinduced reduction on the W18O49 / CdS to prepare the composite photocatalyst H0.53WO3 / CdS. The preparation method has the advantages of novelty, simplicity and convenience in operation, high synthesis efficiency and low cost; and the excitation lights for the photochromic phenomenon of tungsten oxide are extended to visible lights for the first time, and are combined with the photocatalytic process, and the advantages of rapid electron transfer and strong light absorption capability of the hydrogen tungsten bronze are used, so the separation of photo-generated carriers of the composite photocatalyst, the recombination rate of the carriers is reduced, and the light absorption capability of the composite photocatalyst is greatly improved, thereby the composite photocatalyst has an excellent photocatalytic hydrogen production performance, and has a broad application prospect in the field of exploring of clean renewable energy.

Description

technical field [0001] The invention belongs to the field of photocatalysis, and in particular relates to a preparation method of a hydrogen tungsten bronze / cadmium sulfide novel composite photocatalyst and an application of the obtained composite photocatalyst in photolysis of water to produce hydrogen. Background technique [0002] Tungsten bronze is a highly stable cation-doped metal oxide with dark blue metallic luster, generally used in M x WO 3 Indicates that it exhibits the properties of metal conductors or semiconductors, and its color and performance will have corresponding differences with the difference of M and x. Tungsten bronze-type materials have unique and excellent properties in ferroelectricity, piezoelectricity, pyroelectricity, nonlinear optics, etc., and have gradually attracted widespread attention. At present, they have become second only to perovskite-type materials in the field of electronic material research. However, there are relatively few repo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04C01B3/04
CPCC01B3/042B01J27/04C01B2203/0277B01J35/39Y02P20/133Y02E60/36
Inventor 刘平张璐璐冯文辉赵燕高帆
Owner FUZHOU UNIV