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Iron-based metal organic framework (MOFs) photocatalytic material and its preparation method and use

A photocatalytic material, iron-based technology, applied in the field of photocatalysis, can solve the problems of ineffective adsorption of VOCs pollutants, reduced photocatalytic oxidation efficiency, small specific surface area, etc., achieves excellent adsorption and photocatalytic synergy, and is conducive to adsorption and enrichment, the effect of large specific surface area

Inactive Publication Date: 2016-11-02
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The semiconductor photocatalysts currently developed generally exhibit catalytic activity under the excitation of ultraviolet light, which accounts for less than 5% of sunlight; in addition, due to the small specific surface area of ​​most semiconductor catalysts, they cannot effectively adsorb the actual atmosphere. Medium and low concentration of VOCs pollutants (generally ppbv to ppmv level), resulting in greatly reduced photocatalytic oxidation efficiency
However, how to prepare high-efficiency Fe with small particle size, high dispersion and large specific surface area 2 o 3 Photocatalytic materials remain a challenge

Method used

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  • Iron-based metal organic framework (MOFs) photocatalytic material and its preparation method and use
  • Iron-based metal organic framework (MOFs) photocatalytic material and its preparation method and use

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Effect test

Embodiment 1

[0029] S1. FeCl with a molar ratio of 2:1 3 ·6H 2 O and terephthalic acid were added to 30 mL of DMF solution, stirred at room temperature for 1 h, and an orange-yellow transparent solution was obtained.

[0030] S2. Put the transparent solution obtained in step S1 into a 100mL hydrothermal reactor and react at 110°C for 24h; after cooling to room temperature at a cooling rate of 0.1°C / min, collect the precipitate to obtain an iron-based MOFs photocatalytic material crude products.

[0031] S3. Soak the precipitate obtained in step S2 in ethanol solution, soak at 60°C for 15h, and obtain solid powder in the solution by filtration; vacuum dry at 150°C for 12h to obtain an activated iron-based MOFs photocatalytic material.

Embodiment 2

[0033] S1. FeCl with a molar ratio of 1:1 3 ·6H 2 O and terephthalic acid were added to 30mL DMF solution, stirred at room temperature for 2h, and an orange-yellow transparent solution was obtained.

[0034] S2. Put the transparent solution obtained in step S1 into a 100mL hydrothermal reactor and react at 150°C for 20h; after cooling to room temperature at a cooling rate of 0.5°C / min, collect the precipitate to obtain an iron-based MOFs photocatalytic material crude products;

[0035] S3. Soak the precipitate obtained in step S2. in ethanol solution, soak at 60°C for 15h, and obtain solid powder in the solution by filtration; vacuum-dry at 120°C for 15h to obtain an activated iron-based MOFs photocatalytic material.

Embodiment 3

[0037] S1. FeCl with a molar ratio of 2:1 3 ·6H 2 O and terephthalic acid were added to 30mL DMF solution, stirred at room temperature for 1.5h, and an orange-yellow transparent solution was obtained.

[0038] S2. Put the transparent solution obtained in step S1 into a 100mL hydrothermal reactor and react at 150°C for 24h; after cooling to room temperature at a cooling rate of 1.0°C / min, collect the precipitate to obtain an iron-based MOFs photocatalytic material crude products.

[0039]S3. Soak the precipitate obtained in step S2. in ethanol solution, soak at 80°C for 12h, and obtain the solid powder in the solution by filtering; vacuum-dry at 150°C for 12h to obtain the activated iron-based MOFs photocatalytic material.

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Abstract

The invention discloses an iron-based metal organic framework (MOFs) photocatalytic material and its preparation method and use. The preparation method comprises dissolving FeCl3.6H2O and terephthalic acid in a DMF solution, carrying out a hydro-thermal reaction process under temperature programmed control and orderly carrying out alcohol washing, filtration and vacuum drying on the precipitated solids. The photocatalytic material has excellent adsorption and enrichment effects on volatile organic chemicals (VOCs), can efficiently degrade VOCs under visible light action and can be used in an air VOCs photocatalytic purification reaction system. The preparation method has the characteristics of simple processes, good environmental friendliness, mild reaction conditions, high catalytic efficiency and no secondary pollution and can be massively promoted in the field of environmental protection.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and in particular relates to an iron-based metal-organic framework (MOFs) photocatalytic material and a preparation method thereof, and an application thereof in controlling air pollution volatile organic compounds. Background technique [0002] With the rapid advancement of industrialization and urbanization, air pollution in my country is becoming more and more serious. Among all kinds of air pollutants, volatile organic compounds (Volatile organic compounds, VOCs), as an important source of air pollution, have the characteristics of low concentration and high toxicity, which seriously threaten human health and sustainable development of society. Widely concerned by the government, the public and scientific researchers. [0003] In recent years, the emerging photocatalytic oxidation technology is expected to directly oxidize VOCs into CO by direct use of sunlight under the action of pho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/22B01D53/86B01D53/72B01D53/44
CPCB01D53/8668B01D53/8687B01J31/2239B01D2255/705B01J2531/0213B01J2531/842B01J35/39Y02A50/20
Inventor 刘宏利安太成陈江耀李桂英
Owner GUANGDONG UNIV OF TECH
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