Metal-organic framework material photosensitization titanium dioxide co-catalyst, and preparation method and application thereof

An organic framework, titanium dioxide technology, applied in the field of visible light catalysts, can solve the problems of reducing the interface energy between two phases, cumbersome steps, complicated methods, etc., and achieve the effects of good stability and durability, elimination of environmental pollution, and simple preparation method.

Active Publication Date: 2017-02-08
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Most of the current research is to reduce the interfacial energy between the two phases by forming new chemical bonds, and to establish channels for electron or energy transfer. Although some progress has been made, the methods reported so far are too complicated and harsh. The method is only applicable to selected MOFs materials, and the steps are relatively cumbersome. At the same time, the obtained composite catalyst also

Method used

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  • Metal-organic framework material photosensitization titanium dioxide co-catalyst, and preparation method and application thereof
  • Metal-organic framework material photosensitization titanium dioxide co-catalyst, and preparation method and application thereof
  • Metal-organic framework material photosensitization titanium dioxide co-catalyst, and preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0045] The metal-organic framework material photosensitization titanium dioxide cocatalyst ADA-M / TiO of this embodiment 2 , by combining MOFs material ADA-M with TiO 2 It is obtained by mechanical grinding and mixing at a molar ratio of 0.4%, wherein ADA is 9,10-diacrylate anthracene, M is Cd(NO 3 ) 2 4H 2 O.

[0046] Among them, the synthesis of ADA-M used is the same as the preparation method in patents 2015102154009 and 2015102168478. The details of this example are as follows: 9,10-diacrylate anthracene and Cd(NO 3 ) 2 4H 2 O is dissolved in the volume ratio of DMF:H according to the mass ratio of 1:20 2 In a mixed solvent of O=5:1, then sealed in a glass inoculation bottle and heated for 4 days at a heating temperature of 65° C., the target product ADA-M was obtained as yellow needle-like crystals.

Embodiment 2-10

[0048] Metal-organic framework material photosensitization titanium dioxide cocatalyst ADA-M / TiO of embodiment 2-10 2 Preparation of ADA-Cd with TiO 2 Except the mol ratio, all with embodiment 1. Wherein, in embodiment 2-10 ADA-Cd and TiO 2 The molar ratios are 1%, 2%, 4%, 8%, 12%, 16%, 20%, 32%, 40%, respectively.

Embodiment 11

[0050] The prepared ADA-M / TiO 2 Photocatalytic degradation performance test of

[0051] Taking Rhodamine B as the research object and testing the resulting ADA-M / TiO prepared in Examples 1-10 2 The photocatalytic degradation performance of the specific operation is: take the obtained ADA-M / TiO prepared in Example 1-10 respectively 2 And rhodamine B solution (concentration is 10mg / L), under 25 ℃, avoid light and stir for 12h to establish adsorption-desorption equilibrium; then degrade with 350W xenon lamp equipped with 420nm ultraviolet filter as visible light source, control the temperature of reaction The temperature is 25°C, and the total degradation time is 1 hour; samples are taken from the Rhodamine B degradation reaction system every 10 minutes, and the supernatant is taken after centrifugation immediately for UV-visible spectrum analysis, by measuring the intensity of the largest characteristic absorption peak of Rhodamine B Monitor and record its degradation efficien...

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Abstract

The invention discloses a metal-organic framework material photosensitization titanium dioxide co-catalyst ADA-M/TiO2, which is obtained through simply mechanical grounding and mixing an MOFs material ADA-M and TiO2 according to a molar ratio of 0.4 percent to 40 percent, so that photoinduced electron transfer from the ADA-M to the TiO2 can be realized, and the aim of co-catalysis under visible light is achieved, wherein the ADA is an organic-ligand 9,10-diacrylic acid anthracene, and M is metal salt. The invention also discloses application of the metal-organic framework material photosensitization titanium dioxide co-catalyst ADA-M/TiO2 on high-efficiently catalytic degrading multiple cationic and anionic dyestuffs. A preparation method of the metal-organic framework material photosensitization titanium dioxideco-catalyst ADA-M/TiO2 provided by the invention is simple; an obtained binaryco-catalyst can be used for high-efficiently catalytic degrading the multiple cationic and anionic dyestuffs at room temperature and under visible light without additionally adding any oxidizing agent, has better stability and durability, and is green, environmental-friendly, and low in environment pollution abatement cost.

Description

technical field [0001] The invention relates to a visible light catalyst, in particular to a metal-organic framework material photosensitized titanium dioxide cocatalyst ADA-M / TiO 2 And its preparation method and application. Background technique [0002] As people's requirements for the living environment are increasing, economical and efficient technical means are urgently needed to treat the organic wastewater discharged from industry, especially the dye wastewater discharged from printing factories and textile factories. Due to the advantages of solar energy, such as cheap, clean, and renewable, the use of solar energy for photocatalytic degradation of pollutants has become the focus of attention, and the core of photocatalytic technology is the selection of economical and efficient photocatalysts. [0003] Anatase titanium dioxide (TiO 2 ) as an excellent photocatalyst has been widely used in the fields of photocatalytic water splitting to produce hydrogen, pollutant ...

Claims

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Application Information

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IPC IPC(8): B01J31/16C02F1/30
CPCY02W10/37B01J31/1691B01J35/004C02F1/30C02F2101/308
Inventor 解明华杨秀丽侯贵华张勤芳关荣锋
Owner YANCHENG INST OF TECH
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