Zinc ferrite/Bi-MOF/tannic acid composite visible-light-induced photocatalyst

A technology of zinc ferrite and tannic acid, which is applied in the fields of environment and energy, can solve problems such as poor stability, and achieve the effects of promoting separation, enhancing stability, and strengthening synergistic effects

Active Publication Date: 2020-09-29
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The application of MOFs materials in the field of photocatalysis has the problem of poor stability

Method used

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  • Zinc ferrite/Bi-MOF/tannic acid composite visible-light-induced photocatalyst
  • Zinc ferrite/Bi-MOF/tannic acid composite visible-light-induced photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1. Preparation of zinc ferrite / Bi-MOF / tannic acid composite visible light catalyst:

[0039] Preparation of mixed solvent: Mix dimethylformamide, dipropylene glycol, ethanol, and methanol to prepare a mixed solvent, wherein the mass ratio of dimethylformamide: dipropylene glycol: ethanol: methanol is 1:1:1:2.

[0040] Get 1g bismuth nitrate pentahydrate and 0.6g1,3,5-trimellitic acid and dissolve in 25g of mixed solvent respectively, obtain bismuth nitrate solution and 1,3,5-trimellitic acid solution, put the gained bismuth nitrate solution at room temperature Slowly add it dropwise to the obtained 1,3,5-tribenzenetricarboxylic acid solution while stirring, and continue to stir at room temperature for 0.5h. Then, 0.03 g of tannic acid and 0.3 g of nano-zinc ferrite were added thereto, and stirring was continued at room temperature for 0.5 h to obtain a mixed solution. Among them, the mass ratio of tannic acid: 1,3,5-trimesic acid: bismuth nitrate pentahydrate: nanomete...

Embodiment 2

[0046] 1. Preparation of zinc ferrite / Bi-MOF / tannic acid composite visible light catalyst:

[0047] Prepare mixed solvent: the same as the mixed solvent in Example 1;

[0048] Get 1g bismuth nitrate pentahydrate and 0.9g 1,3,5-trimellitic acid and dissolve in the mixed solvent of 40g respectively, obtain bismuth nitrate solution and 1,3,5-trimellitic acid solution, the gained bismuth nitrate solution Slowly add it dropwise to the obtained 1,3,5-trimesic acid solution while stirring at room temperature, continue to stir at room temperature for 1.0 h, then add 0.18 g of tannic acid and 1.2 g of nano-zinc ferrite to it, and continue to stir at room temperature for 1.0 h. h, to obtain a mixed solution, wherein the mass ratio of tannic acid: 1,3,5-trimellitic acid: bismuth nitrate pentahydrate: nanometer zinc ferrite: mixed solvent is 0.18:0.9:1:1.2:80.

[0049] Put the mixed solution in a hydrothermal reaction kettle. After the reaction kettle is sealed, place it in an electric c...

Embodiment 3

[0054] 1. Preparation of zinc ferrite / Bi-MOF / tannic acid composite visible light catalyst:

[0055] Prepare mixed solvent: the same as the mixed solvent in Example 1;

[0056] Get 1g bismuth nitrate pentahydrate and 0.7g 1,3,5-trimellitic acid and dissolve in the mixed solvent of 30g respectively, obtain bismuth nitrate solution and 1,3,5-trimellitic acid solution, the gained bismuth nitrate solution Slowly add it dropwise to the obtained 1,3,5-trimesic acid solution while stirring at room temperature, continue to stir at room temperature for 0.7h, then add 0.08g of tannic acid and 0.5g of nano-zinc ferrite to it, and continue to stir at room temperature for 0.8 h, to obtain a mixed solution, wherein the mass ratio of tannic acid: 1,3,5-trimellitic acid: bismuth nitrate pentahydrate: nanometer zinc ferrite: mixed solvent is 0.08:0.7:1:0.5:60.

[0057] The mixed solution was placed in a hydrothermal reaction kettle, and after the reaction kettle was sealed, it was placed in an...

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Abstract

The invention discloses a zinc ferrite / Bi-MOF / tannic acid composite visible-light-induced photocatalyst, and belongs to the technical field of environment and energy. Tannic acid is used as a doped ligand to modify Bi-MOF and is compounded with nanometer zinc ferrite, and the zinc ferrite / Bi-MOF / tannic acid composite visible-light-induced photocatalyst is prepared by a one-pot solvothermal method.The ultrahigh specific surface area and adsorption capacity of Bi-MOF are beneficial to entrance of pollutant molecules and direct contact with active sites, so that the transmission distance of electrons is shortened; and in addition, in-situ doping of tannic acid and compounding of nanometer zinc ferrite cooperate to effectively improve the separation efficiency of carriers, so the absorption intensity of visible light is enhanced. The obtained zinc ferrite / Bi-MOF / tannic acid ternary composite visible-light-induced photocatalyst is very stable, and no residue exists in wastewater; and the material can be conveniently recycled at low cost through an external magnetic field, and is a green and efficient new material with industrial application prospect.

Description

technical field [0001] The invention relates to a zinc ferrite / Bi-MOF / tannic acid composite visible light catalyst, which belongs to the technical field of environment and energy. Background technique [0002] With the continuous and rapid development of industrialization and human society, the use of dyes and antibiotics is large, and the pollution of related organic wastewater has become a major problem that seriously endangers the ecological environment and human health. It is two types of refractory wastewater. To solve this problem, many coping strategies have been explored, such as Fenton oxidation, ozone oxidation, biodegradation, physical adsorption, photocatalytic degradation, etc. Among the various methods for removing organic wastewater, photocatalytic technology is an environmentally friendly and sustainable water treatment method because it can fully decompose products only by adjusting the redox ability of photogenerated carriers without causing secondary pollu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/28B01J31/22B01J23/80C02F1/30C02F101/30C02F101/38
CPCB01J23/80B01J31/2239B01J31/28B01J35/0033B01J35/004B01J2531/54C02F1/30C02F2101/38C02F2101/40C02F2305/10
Inventor 顾文秀宋启军李海新方御王婵赵媛滕跃邹路易
Owner JIANGNAN UNIV
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