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BiOCl/montmorillonite composite photocatalytic material and preparation method and application thereof

A technology of composite photocatalysis and montmorillonite, which is applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of poor photocatalytic effect and achieve remarkable effect and strong adsorption capacity Effect

Active Publication Date: 2015-11-04
SOUTH CHINA NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the current pure BiOCl has poor photocatalytic effect due to its limited adsorption capacity, so further modification is needed to enhance the adsorption capacity of BiOCl complexes.

Method used

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  • BiOCl/montmorillonite composite photocatalytic material and preparation method and application thereof
  • BiOCl/montmorillonite composite photocatalytic material and preparation method and application thereof
  • BiOCl/montmorillonite composite photocatalytic material and preparation method and application thereof

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Embodiment 1

[0028] A preparation method of BiOCl / montmorillonite composite photocatalytic material, comprising the following steps:

[0029] (1) It is the Na-Mt suspension liquid of 1.0wt% and the Bi(NO 3 ) 3 Each solution was 100mL, and the pH value of the solution was adjusted to 0; then, under stirring conditions, the Bi(NO 3 ) 3 The solution was gradually added dropwise to the Na-Mt suspension at an optimal rate of 3mL / min. After ultrasonication for 1 hour, the pH value of the reaction solution was adjusted to 2 with ammonia water, and the reaction mixture was stirred for 12 hours to obtain a mixed suspension;

[0030] (2) Centrifuge the mixed suspension obtained in step (1), wash the precipitate three times with deionized water and absolute ethanol, dry at 80°C (for 9 hours), grind, and pass through a 200-mesh sieve to obtain the obtained BiOCl / montmorillonite composite photocatalytic material BiOCl-Mt 1 .

[0031] According to the above method, the mass fraction of the Na-Mt su...

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Abstract

The present invention discloses a BiOCl / montmorillonite composite photocatalytic material and a preparation method and an application thereof. The preparation method comprises the following steps of: during stirring, adding a 100 ml 3.0 wt% Bi(NO3)3 solution dropwise to a 100ml 1.0-5.0 wt% sodium-based montmorillonite suspension; after ultrasonic processing is performed, adjusting PH to 2; performing stirring for reaction for 8-16 h; centrifuging the mixed suspension; performing precipitation; washing the precipitate; drying and grinding the precipitate; and sieving the ground precipitate through a 200-mesh sieve to obtain the BiOCl / montmorillonite composite photocatalytic material. Under UV irradiation, the effect of adsorption and photocatalytic degradation is very significant for a cationic dye rhodamine B and an anionic dye orange G, and by using 0.15 g / L of the BiOCl / montmorillonite composite photocatalytic material, both the clearance rates of 40 mg / L of RhB and OG within a relatively short period, 1 h, are close to 100%.

Description

technical field [0001] The invention belongs to the field of environmental functional materials, and in particular relates to a BiOCl / montmorillonite composite photocatalytic material and its preparation method and application. Background technique [0002] It is estimated that there are more than 100,000 commercially available dyes worldwide, and the discharge of dye wastewater exceeds 700,000 tons per year. Many dyes are toxic or even carcinogenic, posing a serious threat to aquatic organisms. Moreover, since most of the dyes are refractory organic compounds with complex chemical structures, it is difficult to be phagocytized and destroyed by bacteria in conventional activated sludge, which makes it difficult for ordinary biochemical treatment effluent to meet the discharge standards. Physicochemical methods, such as: foam air flotation method, physical chemical adsorption method, electrolytic coagulation method, chemical redox method, photocatalytic oxidation method, etc....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/06C02F1/32C02F101/38
Inventor 许成群顾凤龙吴宏海
Owner SOUTH CHINA NORMAL UNIVERSITY
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