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A mof@tio 2 @pdvb photocatalyst and its preparation method and application

A photocatalyst and reaction kettle technology, applied in physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, chemical instruments and methods, etc. Hydrophilic, poor photocatalytic activity, etc., to achieve the effect of short cycle, inhibition of deposition on the surface of the material, and large specific surface area

Active Publication Date: 2021-03-30
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome MOF materials and TiO 2 To solve the problems of poor photocatalytic activity, low mineralization rate, easy carbon deposition and deactivation, and hydrophilicity of the material, a MOF@TiO with controllable size, morphology, hydrophobicity, and structure is provided. 2 Preparation method and application of @PDVB photocatalyst

Method used

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  • A mof@tio <sub>2</sub> @pdvb photocatalyst and its preparation method and application
  • A mof@tio <sub>2</sub> @pdvb photocatalyst and its preparation method and application
  • A mof@tio <sub>2</sub> @pdvb photocatalyst and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0032] Preparation of PDVB: Mix 2.0g of divinylbenzene and 20mL of tetrahydrofuran to form mixed solution A, stir at room temperature at 25°C for 10min, then add 0.05g of azobisisobutylcyanide to mixed solution A, mix and stir for 240min to obtain mixed solution B , and then transfer B to a polytetrafluoroethylene reactor, then put the liner of the polytetrafluoroethylene reactor into a high-pressure reactor, conduct a hydrothermal reaction at 100°C for 12 hours, and after natural cooling, dissolve the organic solvent at 25°C Volatilization and removal to prepare superhydrophobic material PDVB;

[0033] Preparation of MIL-101: Add 3.2g of chromium nitrate and 1.3g of terephthalic acid into 56mL of deionized water to obtain mixed solution A, stir at room temperature at 25°C for 30min, then add 0.4ml of hydrofluoric acid solution into mixed solution A , mixed and stirred for 30 minutes to obtain a mixed solution B, which was transferred to a polytetrafluoroethylene reactor liner...

Embodiment 2

[0037] Preparation of PDVB: Mix 2.0g of divinylbenzene and 20mL of tetrahydrofuran to form mixed solution A, stir at room temperature at 25°C for 10min, then add 0.05g of azobisisobutylcyanide to mixed solution A, mix and stir for 240min to obtain mixed solution B , and then transfer B to a polytetrafluoroethylene reactor, then put the liner of the polytetrafluoroethylene reactor into a high-pressure reactor, conduct a hydrothermal reaction at 100°C for 12 hours, and after natural cooling, dissolve the organic solvent at 25°C Volatilization and removal to prepare superhydrophobic material PDVB;

[0038] Preparation of MIL-101: Add 3.2g of chromium nitrate and 1.3g of terephthalic acid into 56mL of deionized water to obtain mixed solution A, stir at room temperature at 25°C for 30min, then add 0.4mL of hydrofluoric acid solution into mixed solution A , mixed and stirred for 30 minutes to obtain a mixed solution B, which was transferred to a polytetrafluoroethylene reactor liner...

Embodiment 3

[0042] Preparation of PDVB: Mix 2.0g of divinylbenzene and 20mL of tetrahydrofuran to form mixed solution A, stir at room temperature at 25°C for 10min, then add 0.05g of azobisisobutylcyanide to mixed solution A, mix and stir for 240min to obtain mixed solution B , and then transfer B to a polytetrafluoroethylene reactor, then put the liner of the polytetrafluoroethylene reactor into a high-pressure reactor, conduct a hydrothermal reaction at 100°C for 12 hours, and after natural cooling, dissolve the organic solvent at 25°C Volatilization and removal to prepare superhydrophobic material PDVB;

[0043] Preparation of MIL-101: Add 3.2g of chromium nitrate and 1.3g of terephthalic acid into 56mL of deionized water to obtain mixed solution A, stir at room temperature at 25°C for 30min, then add 0.4ml of hydrofluoric acid solution into mixed solution A , mixed and stirred for 30 minutes to obtain a mixed solution B, which was transferred to a polytetrafluoroethylene reactor liner...

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Abstract

The invention discloses an MOF@TiO2@PDVB photocatalyst as well as a preparation method and application of the MOF@TiO2@PDVB photocatalyst. The method comprises the following steps: carrying out self-assembly on an organic ligand, a metal source, a TiO2 precursor, a divinyl benzene-crosslinking agent, an azodiisobutyronitrile-polymerization initiator and an organic acid in an organic solution, washing, soaking, carrying out vacuum drying, and roasting to obtain the MOF@TiO2@PDVB photocatalytic material. According to the product prepared by the invention, the regular morphology structure, porosity and larger specific surface area of MOF can be maintained; the MOF@TiO2@PDVB photocatalyst inherits the excellent photocatalytic property of TiO2, and has the hydrophobic property of PDVB at the same time, and the adsorption property of lipophilic pollutants, photocatalytic activity, CO2 generation amount and carbon deposition deactivation resistance are significantly improved, so that the MOF@TiO2@PDVB photocatalyst also has excellent photocatalytic activity in high humidity environment. The method has the advantages of simple steps and low cost and can be widely applied to water pollutioncontrol and air pollution control.

Description

technical field [0001] The invention belongs to the technical field of functional materials, in particular to a MOF@TiO 2 The preparation method and application of @PDVB photocatalyst. Background technique [0002] Due to the advantages of green and environmental protection of photocatalytic technology, it has attracted much attention in the treatment of water and atmospheric environment. At the same time, titanium dioxide (TiO 2 ) is the most commonly used photocatalyst due to its non-toxic, cheap and strong redox ability. However, TiO 2 Due to the disadvantages of small specific surface area, low adsorption rate, and easy carbon deposition and deactivation, their practical applications are severely limited. In view of this, many researchers will TiO 2 Combining with porous materials such as SBA-15, ZSM-5 and activated carbon (AC), it is expected to achieve higher photocatalytic activity and anti-coking deactivation. Although traditional porous materials have large adso...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/16B01J31/06B01J21/06C02F1/28C02F1/30C02F1/72C02F101/30
CPCB01J21/063B01J31/06B01J31/1691B01J35/004C02F1/288C02F1/30C02F1/725C02F2101/30C02F2305/10
Inventor 胡芸杨振湘张金辉付名利谢俊
Owner SOUTH CHINA UNIV OF TECH
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