Method for preparing high-efficiency Bi-containing photocatalyst and Bi-containing photocatalyst prepared by method

A photocatalyst and high-efficiency technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of low utilization rate of NaOH, large amount of NaOH, difficult sewage treatment, etc., to improve photocatalysis Oxidation activity, improving photocatalytic oxidation ability, and increasing the effect of application range

Inactive Publication Date: 2017-11-24
JIANGSU HELPER FUNCTIONAL MATERIALS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the amount of NaOH used in this method is relatively large, which makes it difficult to treat the sewage in the later stage, and will inevitably cause low utilization of NaOH
Moreover, this method uses high temperature conditions of 750°C to treat pollutants, and the treatment cost is high.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0028] (1) Preparation of titanium source solution: configure nitric acid solution, and dissolve titanium dioxide in the nitric acid solution;

[0029] (2) Preparation of bismuth source solution: Bi(NO 3 ) 3 ·5H 2 O is a bismuth source, which is dissolved in nitric acid solution;

[0030] (3) Reaction: Quantitatively measure the titanium source solution and the bismuth source solution, continue to stir vigorously after mixing, and leave to settle after the reaction;

[0031] (4) Filtration and collection: wash and filter the above precipitate, dry in an oven, cool to room temperature and collect for later use;

[0032] (5) Roasting: The intermediate product collected above is roasted in a muffle furnace to obtain the final product BTO.

[0033] Wherein, the concentration of the nitric acid solution in the steps (1) and (2) is 0.1-3 mol / L.

[0034] Wherein, the titanium dioxide in the step (1) is P25 titanium dioxide or industrial titanium dioxide.

[0035] Wherein, in th...

Embodiment 1

[0049] First prepare HNO according to the molar concentration of 2mol / L 3 solution. Add 60mL of the above nitric acid solution into a 250mL beaker, then accurately weigh 2.0g of P25 or titanium dioxide and add it into it, and disperse it evenly under ultrasonic conditions, and record it as solution A, that is, the titanium source solution. In another 250mL beaker, add 3.03g Bi(NO 3 ) 3 ·5H 2 O and 2mol / L HNO 3 Solution, after the bismuth nitrate is completely dissolved under ultrasonic conditions, keep it for later use, and record it as solution B, that is, the bismuth source solution. Then follow R Bi =Bi / (Bi+Ti)=0.2 Add solution B to solution A. At this time, solution B is added dropwise. The resulting suspension is stirred vigorously by magnetic force for 24 hours, and then left to stand for 24 hours. Then the resulting precipitate was filtered, dried in an oven at 70°C for 8h, and finally the dried sample was calcined in a muffle furnace at 600°C for 6h to obtain a l...

Embodiment 2

[0051] First prepare HNO according to the molar concentration of 2mol / L 3 solution. Add 60mL of the above-mentioned nitric acid solution into a 250mL beaker, then accurately weigh 2.0g of P25 into it, and disperse it evenly under ultrasonic conditions, which is recorded as solution A. In another 250mL beaker, add 12.13g Bi(NO 3 ) 3 ·5H 2 O and 2mol / L HNO 3 Solution, after the bismuth oxide is completely dissolved under ultrasonic conditions, keep it for future use, and record it as solution B. Then follow R Bi =Bi / (Bi+Ti)=0.5 ratio Add B solution to the above A solution. At this time, B solution is added dropwise. The resulting suspension is stirred vigorously by magnetic force for 24 hours, and then left to stand for 24 hours. Then the resulting precipitate was washed and filtered, dried in an oven at 110°C for 3h, and finally the dried sample was calcined in a muffle furnace at 600°C for 6h to obtain a light yellow powder, which is the Bi-containing photocatalyst Bi 2...

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Abstract

The invention discloses a method for preparing a high-efficiency Bi-containing photocatalyst and the Bi-containing photocatalyst prepared by the method. The method comprises the following steps: preparing a titanium source solution; preparing a bismuth source solution; reacting; filtering and collecting; roasting. According to the method disclosed by the invention, P25(TiO2) is utilized as a titanium source, and the P25(TiO2) is dipped and adsorbed by a Bi(NO3)3 solution and treated by high temperature to obtain the Bi-loaded nano TiO2 photocatalyst. Ultraviolet and visible absorption of the photocatalyst has obvious red shift and can be expanded to a visible light range; furthermore, the catalyst has a simple preparation method, easily obtained raw materials, low production equipment requirement and convenience in achieving industrial operation.

Description

technical field [0001] The invention relates to the field of inorganic functional materials, in particular to a method for preparing a high-efficiency Bi-containing photocatalyst and the prepared Bi-containing photocatalyst. Background technique [0002] In today's society, environmental problems are becoming more and more prominent, and domestic and industrial organic wastewater is produced in large quantities, which makes the ecological environment gradually deteriorate. How to deal with these wastewater has become one of the focuses of current researchers. In recent years, the use of semiconductor nanoparticle composite photocatalysis to treat environmental sewage is a relatively popular technology. In order to improve the photocatalytic activity, the idea of ​​compound semiconductor oxide was proposed. The energy level difference between the two semiconductors can effectively separate the charges, so that the excitation wavelength can be extended to a larger range, even...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/18C02F1/30C02F1/72
CPCB01J23/18B01J35/004C02F1/30C02F1/725
Inventor 蔡建国石洪雁梅伟刚
Owner JIANGSU HELPER FUNCTIONAL MATERIALS
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