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Preparation method for WO3/MOF-SO3@Bi4Ti3O12 composite photocatalyst

A MOF-SO3, photocatalyst technology, applied in organic compound/hydride/coordination complex catalysts, physical/chemical process catalysts, chemical instruments and methods, etc. Low efficiency and light energy utilization rate, etc., to achieve high visible light utilization rate, improve the separation of photogenerated electrons and holes, and expand the effect of light absorption range

Inactive Publication Date: 2018-04-27
XUZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The organic pollutants in these high-salt wastewater are often difficult to effectively degrade using traditional microbial treatment technology, so they cannot meet the national "zero discharge" requirements for industrial wastewater in coal chemical industry and other industries.
Photocatalytic technology came into being under this background. It is cheap and widely applicable. However, the photon quantum efficiency and light energy utilization rate of traditional catalytic materials are generally low. It is necessary to invent new photocatalysts to meet industrial needs.

Method used

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  • Preparation method for WO3/MOF-SO3@Bi4Ti3O12 composite photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A kind of WO 3 / MOF-SO 3 @ Bi 4 Ti 3 o 12 The preparation method of photocatalyst, this method comprises the following steps:

[0014] Step 1. Add 20g of SPEEK (62% sulfonation degree) to 3g of DMF, dissolve to form a SPEEK solution, and add 18g of MOF-SO to the above solution 3 @ Bi 4 Ti 3 o 12 Nanoparticles, and ultrasonic 3h to make it dispersed evenly;

[0015] Step 2. Carefully pour the above dispersion into a mold and quickly place it in an oven at 60°C, keep it for 8 hours, then raise the temperature to 80°C, keep it for 8 hours, acidify it with 1mol / L hydrochloric acid at room temperature for 48 hours to transform the nanoparticles for H + type;

[0016] Step 3, take 10g sodium tungstate, 50g H-type MOF-SO 3 @ Bi 4 Ti 3 o 12 Dissolve nanoparticles, 0.2g cetyltrimethylammonium bromide in 100ml distilled water, mix well after stirring, add HCl with a concentration of 3mol / L to the resulting mixed solution drop by drop to pH = 3, stir to make it react...

Embodiment 2

[0022] Step 3. Take 5g sodium tungstate and 50g H-type MOF-SO 3 @ Bi 4 Ti 3 o 12 Dissolve nanoparticles, 0.2g cetyltrimethylammonium bromide in 100ml distilled water, mix well after stirring, add HCl with a concentration of 3mol / L to the resulting mixed solution drop by drop to pH = 3, stir to make it react complete, centrifugal sedimentation, repeated alternate washing with distilled water and ethanol for 3 times, drying in a blast drying oven at 100°C, and grinding to obtain WO 3 / MOF-SO 3 @ Bi 4 Ti 3 o 12 catalyst of light. All the other steps are the same as in Example 1.

Embodiment 3

[0024] Step 3, take 1g sodium tungstate, 50g H-type MOF-SO 3 @ Bi 4 Ti 3 o 12 Dissolve nanoparticles, 0.2g cetyltrimethylammonium bromide in 100ml distilled water, mix well after stirring, add HCl with a concentration of 3mol / L to the resulting mixed solution drop by drop to pH = 3, stir to make it react complete, centrifugal sedimentation, repeated alternate washing with distilled water and ethanol for 3 times, drying in a blast drying oven at 100°C, and grinding to obtain WO 3 / MOF-SO 3 @ Bi 4 Ti3 o 12 catalyst of light. All the other steps are the same as in Example 1.

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Abstract

The invention discloses a preparation method for a WO3 / MOF-SO3@Bi4Ti3O12 composite photocatalyst. The preparation method employs bismuth oxide, titanium dioxide, potassium chloride, sodium chloride, N,N-dimethylacetamide, hydrated zirconium oxychloride, sodium tungstate and sodium 2-sulfoterephthalate as main raw materials; the catalyst has a typical three-dimensional structure and regular morphology; and the three-dimensional structure composed of bismuth vanadate and organic covalent compounds not only has the advantage of high carrier transport efficiency as a two-dimensional sheet and hasthe characteristics of a high specific surface area, sufficient reaction sites and high visible light utilization rate as a three-dimensional structure. The WO3 / MOF-SO3@Bi4Ti3O12 composite photocatalyst provided by the invention is novel in preparation process, has good visible light degradation effect, can reduce cost and pollution, and shows good application prospects and economic benefits in the decomposition of organic pollutants.

Description

technical field [0001] The present invention relates to a WO 3 / MOF-SO 3 @ Bi 4 Ti 3 o 12 A composite photocatalyst and a preparation method thereof belong to the technical field of catalysts. Background technique [0002] The rapid development of my country's industrial economy has brought many increasingly serious new environmental pollution problems. The water pollution containing organic pollutants represented by dye wastewater in industrial and agricultural wastewater is one of the environmental pollution problems that need to be solved urgently. Due to the variety of industry and agriculture, the components of the wastewater produced are very complex, and the wastewater often contains a certain amount of salt concentration, such as coal chemical industry, chlor-alkali industry and pesticide industry, etc., the salt concentration in the wastewater is relatively high, mostly above. The organic pollutants in these high-salt wastewater are often difficult to be effect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/38C02F1/30C02F101/32
CPCC02F1/30B01J31/1691B01J31/34B01J31/38C02F2305/10C02F2101/322B01J2531/16B01J35/39B01J35/40B01J35/50
Inventor 蔡廷栋
Owner XUZHOU NORMAL UNIVERSITY
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