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Preparation of MoSe2/SrTiO3 efficient compound photocatalyst

A technology of photocatalyst and composite light, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc. It can solve problems such as complex steps, and achieve the effects of easy control of conditions, good stability, and improved efficiency

Inactive Publication Date: 2019-04-09
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent CN 107442098 A uses titanium-doped strontium titanate to improve its photocatalytic performance, but this method requires high-temperature carbonization with a certain carbon source, which has certain requirements for equipment; Chinese patent CN107138145 A uses attapulgite to support To improve its photocatalytic activity on strontium titanate, but a series of temperature control is required, and the steps are slightly complicated

Method used

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  • Preparation of MoSe2/SrTiO3 efficient compound photocatalyst
  • Preparation of MoSe2/SrTiO3 efficient compound photocatalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0023] SrTiO 3 Preparation: Weigh 1.26g of citric acid and dissolve it in 15mL of absolute ethanol, quickly inject 1.5mL of isopropyl titanate with a pipette gun, keep stirring, add dropwise 1.06g of strontium nitrate solution and 2g of sodium hydroxide solution, and keep stirring After 30 minutes, the mixed solution was poured into a polytetrafluoroethylene-lined hydrothermal kettle, and reacted at 150°C for 36 hours. When cooled to room temperature, wash with deionized water, acetic acid and ethanol respectively, and dry at 80°C for 24h.

[0024] MoSe 2 / SrTiO 3 Preparation of photocatalyst: Weigh 0.05g sodium molybdate, 0.01g selenium powder and 0.24g sodium borohydride, 1g of SrTiO 3 , dissolved in 30mL distilled water and 30mL ethanol, continuously stirred for 30min, poured the mixed solution into a hydrothermal kettle containing p-polyphenol liner, and reacted for 24h at 240°C. When cooled to room temperature, wash with deionized water and ethanol respectively, and d...

Embodiment 2

[0026] Composite MoSe with different components can be obtained only by changing the quality of sodium molybdate and selenium powder under other conditions. 2 SrTiO 3 Catalyst, respectively 0.01% MoSe 2 / SrTiO 3 , 0.05% MoSe 2 / SrTiO 3 , 0.1% MoSe 2 / SrTiO 3 , 0.5% MoSe 2 / SrTiO 3 , 1% MoSe 2 / SrTiO 3 and 5% MoSe 2 / SrTiO 3 .

[0027] MoSe 2 / SrTiO 3 Photocatalytic degradation of methyl orange: 0.2 g of 3% MoSe 2 / SrTiO 3 Adding concentration is 20mg·L -1 500mL of methyl orange solution, ultrasonic 30min, in the photocatalytic reactor, turn on the magnetic stirring, shield all light sources, and carry out dark adsorption for 30min. First measure 4mL of the mixed solution that has reached adsorption equilibrium as the first sample, and mark it as C 0 , Then turn on the mercury lamp, take 4mL solution samples every 15min, and mark it as C. Each sample was centrifuged at high speed, and the supernatant was taken to measure its absorbance.

[0028] Calculate th...

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Abstract

The invention belongs to the field of catalysts, and in particular relates to a preparation of a MoSe2 / SrTiO3 efficient compound photocatalyst. The photocatalyst is formed by compounding strontium titanate and diselenide molybdenum through a secondary hydrothermal method. The preparation method comprises the following steps: mixing titanium isopropoxide with citric acid in ethanol, dropwise addinga strontium nitrate solution and a sodium hydroxide solution separately under a magnetic stirring condition, transferring the solution to a hydrothermal kettle to be heated, cooling the solution to room temperature and washing and drying the solution to obtain a compound matrix strontium titanate; and then mixing strontium titanate with a diselenide molybdenum precursor solution, transferring thesolution to the hydrothermal kettle to be heated, cooling the solution to room temperature and washing and drying the solution to obtain the MoSe2 / SrTiO3 efficient compound photocatalyst. The preparation method of the photocatalyst is relatively simple and easy to control conditions, and the photocatalyst can be recycled, is free of pollution and can degrade methyl orange and organic dyes with similar genes to methyl orange efficiently. The photocatalyst has a very huge application prospect in the field of organic wastewater treatment.

Description

technical field [0001] The invention belongs to the field of catalysts, in particular to a MoSe 2 / SrTiO 3 Preparation method of high-efficiency composite photocatalyst. Background technique [0002] In recent years, with the massive discharge of organic dye wastewater, the ecological environment has been seriously damaged, and the organic groups that cannot be effectively degraded are always threatening human health. Due to the high content of organic dyes in wastewater and their refractory degradation, ordinary methods such as physical and chemical adsorption and biodegradation simply transfer organic dye molecules to other media, which cannot fundamentally and effectively solve this problem. [0003] In recent years, reports on the use of semiconductor materials as photocatalysts to degrade organic dyes in wastewater are common. Among them, perovskite-type oxides have gradually received attention in the field of photocatalytic applications, especially the representativ...

Claims

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Application Information

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IPC IPC(8): B01J27/057C02F1/30C02F101/30
CPCC02F1/30B01J27/0573C02F2101/30C02F2101/308B01J35/39
Inventor 马江权周兴旺欧尔胜杨青左士祥高晓新姚均杨明
Owner CHANGZHOU UNIV
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