the w 3 modified bi 2 o 2 co 3 Preparation method of photocatalyst and its application

A photocatalyst and modification technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, water/sludge/sewage treatment, etc., can solve problems that are not conducive to the industrialization process, save energy consumption, and reduce production processes , the effect of reducing production costs

Active Publication Date: 2022-03-11
东北大学秦皇岛分校
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method uses high temperature conditions of 150-160 ° C for a long time, which is not conducive to the process of industrialization

Method used

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  • the w <sub>3</sub> modified bi <sub>2</sub> o <sub>2</sub> co <sub>3</sub> Preparation method of photocatalyst and its application
  • the w <sub>3</sub> modified bi <sub>2</sub> o <sub>2</sub> co <sub>3</sub> Preparation method of photocatalyst and its application
  • the w <sub>3</sub> modified bi <sub>2</sub> o <sub>2</sub> co <sub>3</sub> Preparation method of photocatalyst and its application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A kind of WO 3 Modified Bi 2 o 2 CO 3 The preparation of the photocatalyst comprises the following steps. The WO 3 with Bi(NO 3 ) 3 The ratio of the amount of substances is 1:1.

[0037] (1) Take 1mmol WO 3 Dissolve in 30 mmol of deionized water, and stir magnetically for 30 min at a stirring speed of 700 r / min to prepare solution A.

[0038] (2) Take 1mmol Bi(NO 3 ) 3 Dissolve in 20mmol deionized water, stir magnetically for 30min at a stirring speed of 700r / min, after mixing evenly, add 20ml of HNO with a concentration of 65% 3 solution, solution B was prepared.

[0039] (3) Slowly pour solution B into solution A, add 0.2mmol nano-SiO 2 , sonicated for 30min, after it was completely dissolved, add 2mmolNa 2 CO 3 solution and 0.2 mmol of polyvinylpyrrolidone to prepare solution C.

[0040] (4) Heat solution C in a water bath, stir for 3 hours, collect the precipitate by vacuum filtration, wash twice with deionized water and absolute ethanol, dry at 60°C ...

Embodiment 2

[0045] A kind of WO 3 Modified Bi 2 o 2 CO 3 The preparation of the photocatalyst comprises the following steps. The WO 3 with Bi(NO 3 ) 3 The ratio of the amount of substances is 0.6:1.

[0046] (1) Take 1.2mmol WO 3 Dissolve in 36 mmol of deionized water, and stir magnetically for 30 min at a stirring speed of 800 r / min to prepare solution A.

[0047] (2) Take 2mmol Bi(NO 3 ) 3 Dissolve in 40mmol deionized water, stir magnetically for 30min at a stirring speed of 800r / min, after mixing evenly, add 20ml of 65% HNO 3 solution, solution B was prepared.

[0048] (3) Slowly pour solution B into solution A, add 0.4mmol nano-SiO 2 , sonicated for 30 min, and after it was completely dissolved, 4 mmol of 38% ammonia solution and 0.4 mmol of polyvinylpyrrolidone were added to prepare solution C.

[0049] (4) Heat solution C in a water bath, stir for 3 hours, collect the precipitate by vacuum filtration, wash twice with deionized water and absolute ethanol, dry at 80°C for...

Embodiment 3

[0053] A kind of WO 3 Modified Bi 2 o 2 CO 3 The preparation of the photocatalyst comprises the following steps. The WO 3 with Bi(NO 3 ) 3 The ratio of the amount of substances is 0.8:1.

[0054] (1) Take 0.8mmol WO 3 Dissolve in 24 mmol of deionized water, and stir magnetically for 30 min at a stirring speed of 500 r / min to prepare solution A.

[0055] (2) Take 1mmol Bi(NO 3 ) 3 Dissolve in 20mmol of deionized water, stir magnetically for 30min at a stirring speed of 500r / min, after mixing evenly, add 20ml of HNO with a concentration of 65% 3 solution, solution B was prepared.

[0056] (3) Slowly pour solution B into solution A, add 0.2mmol nano-SiO2, ultrasonically shake for 30min, and after it is completely dissolved, add 2mmol NaOH and 0.5mmol polyvinylpyrrolidone to prepare solution C.

[0057] (4) Heat solution C in a water bath, stir for 3 hours, collect the precipitate by vacuum filtration, wash twice with deionized water and absolute ethanol, dry at 80°C f...

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Abstract

The invention belongs to the technical field of semiconductor photocatalytic modified composite materials, in particular to a WO 3 Modified Bi 2 o 2 CO 3 The preparation method of photocatalyst and its application, with WO 3 solution and Bi(NO 3 ) 3 solution as the main raw material, with HNO 3 solution, nano-SiO 2 , lye, polyvinylpyrrolidone as auxiliary, through WO 3 Modified Bi 2 o 2 CO 3 Photocatalysts were used to prepare composite materials. The WO 3 The preparation method of doped modified bismuth-based photocatalytic materials is simple, avoids the use of irritating and difficult-to-degrade raw materials, does not need high-pressure hydrothermal reaction equipment, and has a short reaction time, which improves the safety performance of the experimental process and reduces the risk of waste liquid discharge. Hazardousness; and the prepared sample is uniform in scale, good in dispersion, and has thinner nanosheets, which can be used to solve environmental pollution and energy crisis.

Description

technical field [0001] The invention belongs to the technical field of semiconductor photocatalytic modified composite materials, in particular to a WO 3 Modified Bi 2 o 2 CO 3 Preparation method of photocatalyst and its application. Background technique [0002] In the past few decades, the adverse effects of printing and dyeing, pharmaceutical, chemical and other industrial wastewater on human health and the environment have increased rapidly, especially the dye wastewater discharged from these industries, due to the complexity of the dye structure, it is very difficult to degrade, and has always been a Difficulties in water pollution control. The treatment of dye wastewater is facing new challenges. About 750,000 tons of industrial wastewater containing dyes are discharged in my country every year, and most of the dyes that remain in the water for a long time belong to polymer complexes or aromatic organic compounds. , not only has a large chroma, but also is very tox...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/232C02F1/30C02F101/38
CPCB01J35/004B01J27/232C02F1/30C02F2101/38C02F2305/10
Inventor 刘宣文郭瑞苏娜倪志远
Owner 东北大学秦皇岛分校
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