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Preparation method of CoTiO3/Bi4NbO8Cl composite photocatalyst material

A technology of catalyst and recombination of light, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of limited development of photogenerated carrier recombination efficiency, achieve low cost, high safety, The effect of simple equipment

Inactive Publication Date: 2019-12-24
青岛耀创高新科技有限公司 +1
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Problems solved by technology

Bi 4 NbO 8 Cl is derived from [Bi 2 o 2 ] 2+ , [NbO 4 ] 3- 、[Bi 2 o 2 ] 2+ , [C1] -1 The formed layered structure is conducive to the subsequent interlayer modification process, thereby improving the light absorption characteristics and photocatalytic activity of the material, but the recombination efficiency of photogenerated carriers limits its further development.

Method used

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  • Preparation method of CoTiO3/Bi4NbO8Cl composite photocatalyst material
  • Preparation method of CoTiO3/Bi4NbO8Cl composite photocatalyst material
  • Preparation method of CoTiO3/Bi4NbO8Cl composite photocatalyst material

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Embodiment Construction

[0022] (1) Bi 4 NbO 8 Preparation of Cl: Dissolve 378.3mg of urea in 5mL of deionized water, and after fully stirring, add 135mg of niobium chloride, 727.6mg of bismuth nitrate pentahydrate and 130mg of bismuth oxychloride in turn, and ultrasonically stir for 30min respectively. The mixture was transferred to a porcelain boat, and put into a muffle furnace preheated to 600°C for calcination for 6h.

[0023] (2)CoTiO 3 Preparation: Dissolve 0.01 mol of cobalt acetate tetrahydrate and 0.01 mol of tetrabutyl titanate in 60 ml of ethylene glycol, and stir continuously for 5 hours at room temperature to make them fully react. Then it was centrifuged and washed three times with ethanol, dried in an oven at 60 °C for 6 h, then transferred to a muffle furnace, calcined at 700 °C for 4 h in an air atmosphere, and the heating rate was 5 °C / min, and ground to obtain CoTiO 3 powder.

[0024] (3)CoTiO 3 / Bi 4 NbO 8 Preparation of Cl complex: weigh 0.4g Bi 4 NbO 8 Cl and 0.04g CoTi...

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Abstract

The invention belongs to the field of photocatalysts, and provides a CoTiO3 doped Bi4NbO8Cl composite photocatalyst for degrading organic wastewater and a preparation method of same. Bi4NbO8Cl powderand CoTiO3 powder are prepared through a solution combustion method and a precipitation calcination method respectively, and then the CoTiO3 / Bi4NbO8Cl composite photocatalyst is prepared through mechanical means such as grinding and ultrasonic treatment. The Bi4NbO8Cl is of a single-layer perovskite structure formed by [Bi2O2]<2+>, [NbO4]<3->, [Bi2O2]<2+> and [C1]<->, and the interior of the Bi4NbO8Cl has a strong electric field, so that better electron and hole separation can be caused to enhance the photocatalytic activity. CoTiO3 is used as an excellent narrow-band-gap semiconductor material of ABO3 type perovskite oxide, and has good photoresponsiveness in a visible light region. The CoTiO3 and the layered Bi4NbO8Cl are compounded to form the heterojunction photocatalyst, so that the visible light response range of the Bi4NbO8Cl is widened, the compounding efficiency of photon-generated carriers is reduced, the photocatalytic efficiency of the photocatalyst is improved, and the photocatalytic degradation efficiency of the photocatalyst on organic wastewater is improved.

Description

Technical field: [0001] The invention belongs to the technical field of photocatalytic treatment of pollutants in environmental chemistry, and in particular relates to a simple preparation method of a composite catalyst modified by semiconductor doping. Background technique: [0002] In recent years, my country has experienced increasingly serious environmental pollution and the gradual depletion of energy, especially the problem of water pollution. Various pollutants in water can be decomposed into non-toxic small molecular substances by using semiconductor materials. In the past, ZnO, TiO 2 , titanate, etc. have been favored by researchers and have been extensively studied. For metal oxides, the band gap is large and can absorb a large amount of ultraviolet light, but the response ability to visible light is insufficient. And Bi 4 NbO 8 The band gap of Cl is about 2.39eV. This type of photocatalyst has a long effective time and no pollution to the environment, making ...

Claims

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Application Information

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IPC IPC(8): B01J27/135B01J37/08C02F1/30C02F101/34C02F101/38C02F101/30
CPCB01J27/135B01J37/082B01J37/0036C02F1/30C02F2101/34C02F2101/38C02F2101/308C02F2305/10C02F2101/30B01J35/39
Inventor 王诚澎
Owner 青岛耀创高新科技有限公司
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