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Preparation method of tin-doped bismuth oxychloride and graphene composite photocatalyst

A graphene composite and bismuth oxychloride technology, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems such as reducing water transparency, destroying water self-purification, complex components, etc., and achieve a strong market The effect of application prospect, wide absorption spectrum range and good light absorption performance

Active Publication Date: 2016-12-28
HENAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many kinds of dyes, and a large amount of dye wastewater is discharged into the environmental water body, resulting in the pollution of natural water bodies
First of all, the dye wastewater has a relatively large chroma, which can absorb light, reduce the transparency of the water body, cause hypoxia in the water, greatly affect the microorganisms in the water body, and destroy the self-purification of the water body; secondly, the dye is the hydrogen on the benzene ring of an organic aromatic compound. Aromatic halides, aromatic nitro compounds, aromatic amine chemicals, biphenyl and other polyphenyl ring-substituted compounds generated after halogen, nitro, and amino substitutions are relatively toxic, and some can produce "teratogenic , carcinogenic, and mutagenic” hazards, the content of organic matter in wastewater is high, the composition is complex, and the content of harmful substances is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] 1mmol Bi(NO 3 ) 3 ·5H 2 O was dissolved in 10 mL of hydrochloric acid solution with a molar concentration of 1 mol / L to prepare solution X; 1 mmol SnCl 2 2H 2 O stirred and heated to dissolve in 40 mL of hydrochloric acid solution with a molar concentration of 1 mol / L to obtain a transparent and clear solution Y; Sodium hydroxide solution adjusted the pH value of the mixed solution to 6, continued to stir for 2 hours, filtered to obtain the precipitate, washed with water and ethanol three times, and then dried in a constant temperature drying oven at 60°C for 5 hours to obtain tin-doped bismuth oxychloride visible light catalyst. The RhB removal rate of the visible light catalyst was 83.39% in the degradation of Rhodamine B dye wastewater for 3 hours under natural sunlight.

Embodiment 2

[0012] 1mmol Bi(NO 3 ) 3 ·5H 2 O was dissolved in 10 mL of hydrochloric acid solution with a molar concentration of 1 mol / L to prepare solution X; 1 mmol SnCl 2 2H 2 O stirred and heated to dissolve in 40 mL of hydrochloric acid solution with a molar concentration of 1 mol / L to obtain a transparent and clear solution Y; Sodium hydroxide solution adjusted the pH value of the mixed solution to 6, continued to stir for 2 hours, filtered to obtain the precipitate, washed with water and ethanol three times, and then dried in a constant temperature drying oven at 60°C for 5 hours to obtain tin-doped bismuth oxychloride Visible light catalyst, ultrasonically dissolve 0.625mg graphene oxide in 50mL water to obtain a graphene aqueous solution, then add 1g of tin-doped bismuth oxychloride visible light catalyst, ultrasonically disperse for 30min, stir for 2h, and suction filter to obtain the precipitate, water and ethanol Each was washed three times, and then dried in a constant tem...

Embodiment 3

[0014] 1mmol Bi(NO 3 ) 3 ·5H 2 O was dissolved in 10 mL of hydrochloric acid solution with a molar concentration of 1 mol / L to prepare solution X; 1 mmol SnCl 2 2H 2 O stirred and heated to dissolve in 40 mL of hydrochloric acid solution with a molar concentration of 1 mol / L to obtain a transparent and clear solution Y; Sodium hydroxide solution adjusted the pH value of the mixed solution to 6, continued to stir for 2 hours, filtered to obtain the precipitate, washed with water and ethanol three times, and then dried in a constant temperature drying oven at 60°C for 5 hours to obtain tin-doped bismuth oxychloride Visible light catalyst: ultrasonically dissolve 1.25mg of graphene oxide in 50mL of water to obtain a graphene aqueous solution, then add 1g of tin-doped bismuth oxychloride visible light catalyst, ultrasonically disperse for 30min, then stir for 2h, suction filter to obtain the precipitate, water and ethanol After each washing three times, and then drying at 60°C...

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Abstract

The invention discloses a preparation method of a tin-doped bismuth oxychloride and graphene composite photocatalyst. The method particularly comprises the steps that 1, Bi(NO3)3.5H2O is dissolved in a hydrochloric acid solution, and a solution X is obtained; 2, SnCl2.2H2O is stirred, heated and dissolved in a hydrochloric acid solution, and a transparent clear solution Y is obtained; 3, under the action of stirring, the solution X is dropwise added into the solution Y, and a sodium hydroxide solution with the molar concentration of 2 mol / L is used for adjusting the pH value of the mixed solution to be 6; 4, drying is conducted at 60 DEG C for 5 h, and the tin-doped bismuth oxychloride visible-light-driven photocatalyst is obtained; 5, the tin-doped bismuth oxychloride visible-light-driven photocatalyst is added into an aqueous solution of graphene, drying is conducted at 60 DEG C for 5 h, and the tin-doped bismuth oxychloride and graphene composite photocatalyst is obtained. The prepared tin-doped bismuth oxychloride and graphene composite photocatalyst has a good light absorption property and a visible light-responded photocatalysis property.

Description

technical field [0001] The invention belongs to the technical field of photocatalyst and dye wastewater degradation, and in particular relates to a preparation method of a tin-doped bismuth oxychloride / graphene composite photocatalyst. Background technique [0002] The continuous development of society promotes the development of the chemical industry, but industrial wastewater is also increasing in the process of development. Dye wastewater is one of the main harmful industrial wastewater, which mainly comes from the production industry of dyes and dye intermediates. There are many kinds of dyes, and a large amount of dye wastewater is discharged into the environmental water body, resulting in the pollution of natural water bodies. First of all, the dye wastewater has a relatively large chroma, which can absorb light, reduce the transparency of the water body, cause hypoxia in the water, greatly affect the microorganisms in the water body, and destroy the self-purification...

Claims

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Application Information

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IPC IPC(8): B01J27/135C02F1/28C02F101/30
CPCC02F1/281B01J27/135B01J37/009B01J37/031B01J37/343C02F2101/308B01J35/19B01J35/39Y02W10/37
Inventor 孙剑辉韩笑董淑英孙靖宇骆圣达谭露王柯
Owner HENAN NORMAL UNIV
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