BaTiO3-CdS nanometer composite photocatalyst and preparation method thereof

A nano-composite, photocatalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, inorganic chemistry, etc., to reduce the recombination rate, improve the photocatalytic activity, and improve the effect of separation

Active Publication Date: 2018-02-09
FUZHOU UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, it has not been seen that spherical BaTiO is coated with CdS as in the present invention. 3 The relevant report of the photocatalyst of powder, the principle of the present invention is to utilize BaTiO 3 Separation of photogenerated carriers wrapped in CdS surface driven by spontaneous polarization electric field

Method used

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  • BaTiO3-CdS nanometer composite photocatalyst and preparation method thereof
  • BaTiO3-CdS nanometer composite photocatalyst and preparation method thereof
  • BaTiO3-CdS nanometer composite photocatalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] Example 1 BaTiO 3 Precursor preparation

[0031] Measure 5 mL of ethanol and 8.508 g of tetrabutyl titanate, add 5 mL of deionized water under continuous magnetic stirring to obtain solution A, prepare 10 mL of 3.75 M barium hydroxide solution B, add 4 mL of ammonia water, then slowly add solution B to solution A, and react for 30 min in an oil bath at 80°C to prepare BaTiO 3 Precursor C.

Embodiment 2

[0032] Example 2 BaTiO 3 Preparation of nanospheres

[0033] Add the solution C prepared in Example 1 into a polytetrafluoroethylene reactor, add deionized water to 60% of the volume of the reactor, and stir magnetically until the mixture is evenly dispersed. After reacting at 200°C for 24 hours, the obtained product was naturally cooled to room temperature, washed several times with deionized water and ethanol respectively, the precipitate was collected by centrifugation, and dried in vacuum to obtain BaTiO 3 nanospheres.

Embodiment 3

[0034] Example 3 BaTiO 3 - Preparation of CdS composites

[0035] With the BaTiO obtained in embodiment 2 3 The nanospheres were ultrasonically dispersed in deionized water, and 148 mg of cadmium acetate dihydrate was added to disperse evenly, followed by the addition of 80 mg of thiourea, and the reaction was carried out in an oil bath at 80°C for 30 min. The solid product was collected by suction filtration, washed several times with deionized water and ethanol respectively, and dried in vacuum to obtain the BaTiO 3 -CdS composite photocatalyst.

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Abstract

The invention relates to a BaTiO3-CdS nanometer composite photocatalyst and a preparation method thereof and belongs to the technical fields of material preparation and photocatalysis. The method comprises the steps: firstly, synthesizing barium titanate by taking tetrabutyl titanate, potassium hydroxide, barium hydroxide, cadmium acetate and thiourea as raw materials and using a sol-gel method; and then, synthesizing a BaTiO3-CdS nanometer composite structure step by step by using a coprecipitation method. The composite catalyst prepared by using the method can be used for effectively improving the separation of photon-generated carriers, reducing the recombination ratio of the carriers and catalyzing water splitting hydrogen production, has good photocatalytic activity and shows a more excellent photocatalytic performance than a single material. The photocatalytic activity is 88.5 times as much as that of pure CdS, and therefore, the BaTiO3-CdS nanometer composite photocatalyst has awide application prospect in the field of photocatalysis.

Description

technical field [0001] The invention belongs to the technical field of material preparation and photocatalysis, and specifically relates to a BaTiO 3 -CdS nanocomposite photocatalyst and preparation method thereof. Background technique [0002] Hydrogen is a high combustion value, high efficiency and clean energy. However, the current production of hydrogen energy is mainly obtained by reforming coal and natural gas, which will inevitably increase the consumption of non-renewable energy and bring about environmental pollution problems. Therefore, using renewable materials such as water and biomass as raw materials and utilizing solar energy to produce hydrogen is one of the ideal ways to fundamentally solve the problems of energy and environmental pollution. At present, the main reasons restricting the application of photocatalysts in actual production are the low utilization rate of solar energy and the insufficient stability of photocatalysts, so that they cannot be recy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/04C01B3/04
CPCB01J27/04B01J35/0013B01J35/004B01J35/026C01B3/042C01B2203/0277Y02E60/36
Inventor 刘平黄学烟王凯强王波张璐璐赵燕
Owner FUZHOU UNIV
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