Sn3O4-BiOCl heterojunction photocatalytic composite porous adsorption material and preparation method thereof

A porous adsorption material and photocatalytic technology, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, adsorption water/sewage treatment, etc., can solve the problems of no adsorption effect, degradation effect and poor adsorption effect of heavy metal compounds, Achieve the effects of enhancing photochemical activity, reducing recombination rate, and increasing specific surface area

Inactive Publication Date: 2020-05-01
黄春美
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides a Sn 3 o 4 -BiOCl heterojunction photocatalytic composite porous adsorption material and its preparation method solve the problem of poor degradation effect a

Method used

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Examples

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Effect test

preparation example Construction

[0029] Si-doped Sn 3 o 4 The preparation method comprises the following steps:

[0030] (1) Add an appropriate amount of sodium hydroxide solution with a pH of 12-13 into the reaction bottle, and then add SnCl 2 , nano-SiO 2 and complexing agent sodium citrate, the molar ratio of the three substances is 3-4:1:5-6, the reaction bottle is placed in an ultrasonic processor, heated to 50-70 ° C, and the ultrasonic frequency is 22-25 KHz , sonicate for 2-3 h.

[0031] (2) Transfer the solution into a hydrothermal reaction kettle, place it in the heating box of the reaction kettle and heat it to 190-200 °C, react for 15-20 h, cool the solution to room temperature, wash the solid product with appropriate amount of distilled water and ethanol, and Fully dried, the prepared Si-doped Sn 3 o 4 .

[0032] The preparation method of modified activated carbon material comprises the following steps:

[0033] (1) Add distilled water solvent into the reaction flask, then add 2-hydroxypr...

Embodiment 1

[0040] (1) Preparation of Si-doped Sn 3 o 4 Component 1: Add an appropriate amount of sodium hydroxide solution with a pH of 12 to the reaction flask, then add SnCl 2 , nano-SiO 2 and complexing agent sodium citrate, the molar ratio of the three substances is 3:1:5, the reaction bottle is placed in an ultrasonic processor, heated to 50 ° C, and the ultrasonic frequency is 22 KHz, and ultrasonic treatment is performed for 2 h. The solution was transferred into a hydrothermal reaction kettle, and placed in a heating box of the reaction kettle, heated to 190 °C, reacted for 15 h, cooled the solution to room temperature, washed the solid product with an appropriate amount of distilled water and ethanol, and dried it sufficiently to prepare Si-doped sn 3 o 4 Component 1.

[0041] (2) Preparation of 2-hydroxypropyl-β-cyclodextrin-glutamate esterification product 1: add distilled water solvent to the reaction flask, then add 2-hydroxypropyl-β-cyclodextrin and glutamic acid in se...

Embodiment 2

[0046] (1) Preparation of Si-doped Sn 3 o 4 Component 2: Add an appropriate amount of sodium hydroxide solution with a pH of 13 to the reaction flask, then add SnCl 2 , nano-SiO 2 and complexing agent sodium citrate, the molar ratio of the three substances is 3:1:5.5, the reaction bottle is placed in an ultrasonic processor, heated to 50 °C, and the ultrasonic frequency is 25 KHz, and ultrasonic treatment is performed for 3 h. The solution was transferred into a hydrothermal reaction kettle, and placed in a heating box of the reaction kettle, heated to 190 °C, reacted for 15 h, cooled the solution to room temperature, washed the solid product with an appropriate amount of distilled water and ethanol, and dried it sufficiently to prepare Si-doped sn 3 o 4 Component 2.

[0047] (2) Preparation of 2-hydroxypropyl-β-cyclodextrin-glutamic acid esterification product 2: add distilled water solvent to the reaction flask, then add 2-hydroxypropyl-β-cyclodextrin and glutamic acid ...

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Abstract

The invention relates to the technical field of photocatalytic adsorption, and discloses a Sn3O4-BiOCl heterojunction photocatalytic composite porous adsorption material and a preparation method thereof, wherein the Sn3O4-BiOCl heterojunction photocatalytic composite porous adsorption material comprises the following formula raw materials: Si doped Sn3O4, KCl, Bi(NO3)3, sodium dodecyl sulfate anda modified active carbon material. According to the invention, due to the doping of Si, a large number of oxygen defects formed by Sn3O4 are reduced, so that the band gap of Sn3O4 is narrowed, the Sn3O4 light absorption wave band is expanded, the oxygen defect energy level can capture electrons, and the recombination rate of photo-induced electrons and holes is reduced; the Sn3O4 and the BiOCl form a p-n type heterojunction, so that the separation of photo-induced electrons and holes is promoted; 2-hydroxypropyl-beta-cyclodextrin containing a large amount of hydrophilic groups such as hydroxyland amino and chitosan form a cross-linked product to modify active carbon, the active carbon is complexed with heavy metals such as copper and cadmium and ions thereof to form a chelate, and the hydrophilicity of the composite material is enhanced, so that the cross-linking degree of chitosan is increased through 2-hydroxypropyl-beta-cyclodextrin, and the chemical stability of chitosan is enhanced.

Description

technical field [0001] The invention relates to the technical field of photocatalytic adsorption, specifically a Sn 3 o 4 -BiOCl heterojunction photocatalytic composite porous adsorption material and its preparation method. Background technique [0002] Water is the source of life, a necessary condition for the existence of life and economic development, and also an important part of human tissue. my country is a country short of water resources. Although the total amount of water resources ranks sixth in the world, the per capita share is only It accounts for a quarter of the world's per capita water volume. However, the quality of my country's water resources continues to decline, the water environment continues to deteriorate, and the problem of water pollution is likely to be severe, causing adverse social impacts and major economic losses, and seriously threatening the sustainability of society. development and people's living environment. [0003] Water pollution is m...

Claims

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Application Information

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IPC IPC(8): B01J20/24B01J20/30B01J27/135B01J35/10C02F1/30C02F1/72C02F1/28C02F101/30
CPCB01J20/20B01J20/24B01J27/135B01J35/004B01J35/1004C02F1/283C02F1/30C02F1/725C02F2101/30
Inventor 黄春美
Owner 黄春美
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