Combination electrode of transition metal modified TiO2-MOFs membrane and preparation method and application of combination electrode

A composite electrode and transition metal technology, applied in the field of water treatment, can solve the problem of limited ability to remove such pollutants, and achieve the effect of improving photocatalytic activity, stable properties, stability and photocatalytic performance

Active Publication Date: 2018-12-21
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The effluent discharge of urban sewage treatment plants is the most important way for OUVFs to migrate to the environment, and the ability of traditional treatment technologies to remove such pollutants is very limited

Method used

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  • Combination electrode of transition metal modified TiO2-MOFs membrane and preparation method and application of combination electrode
  • Combination electrode of transition metal modified TiO2-MOFs membrane and preparation method and application of combination electrode
  • Combination electrode of transition metal modified TiO2-MOFs membrane and preparation method and application of combination electrode

Examples

Experimental program
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Effect test

Embodiment 1

[0044] Embodiment 1 A kind of transition metal modified TiO 2 - Preparation of composite electrode of MOFs membrane

[0045] 1) Preparation of MOFs membrane material:

[0046] The auxiliary electrode is a platinum wire mesh, the reference electrode is a saturated calomel electrode, and the working electrode is a pure copper mesh with a diameter of 5.0 cm and an aperture of 5 mesh. After ultrasonic cleaning with pure water, use degreasing liquid (10g / L NaOH, 70g / L NaOH 2 CO 3 , 40g / L Na 3 PO 4 12H 2 O and 4g / L Na 2 SiO 3 ) to remove surface oil stains, fully soaked in 100mL of terephthalic acid solution, then electrodeposited (cathode current density 10 mA / cm 2 , solution temperature 30°C, pH 3, stirring rate 200rpm and deposition time 30min) to obtain MOFs film;

[0047] 2) TiO 2 - Preparation of MOFs film: After adding the MOFs film obtained in step 1) to the ethanol solvent, after the wetting is sufficient, slowly add 5 mL of tetrabutyl titanate (Ti(OBu) 4 ), ultr...

Embodiment 2

[0049] Example 2 Transition metal modified TiO 2 - Preparation of MOFs membrane composite electrode

[0050] 1) Preparation of MOFs membrane material:

[0051] The auxiliary electrode is a platinum wire mesh, the reference electrode is a saturated calomel electrode, and the working electrode is a pure copper mesh with a diameter of 5.0 cm and an aperture of 8 mesh. After ultrasonic cleaning with pure water, use degreasing liquid (11g / L NaOH, 70g / L NaOH 2 CO 3 , 70g / L Na 3 PO 4 12H 2 O and 8g / L Na 2 SiO 3 ) to remove surface oil stains, fully soak in 150mL tereoxalic acid solution, and then conduct electrodeposition (cathode current density 55 mA / cm 2 , solution temperature 45°C, pH 4, stirring rate 400rpm and deposition time 60min) to obtain MOFs film;

[0052] 2) TiO 2 - Preparation of MOFs film: After adding the MOFs film obtained in step 1) into the ethanol solvent, after the wetting is sufficient, slowly add 10 mL of tetrabutyl titanate (Ti(OBu) 4 ), ultrasonica...

Embodiment 3

[0054] Example 3 Transition metal modified TiO 2 - Preparation of MOFs membrane composite electrode

[0055] 1) Preparation of MOFs membrane material:

[0056] The auxiliary electrode is a platinum wire mesh, the reference electrode is a saturated calomel electrode, and the working electrode is a pure copper mesh with a diameter of 5.0 cm and an aperture of 20 mesh. Use degreasing liquid (16g / L NaOH, 100g / L NaOH) after ultrasonic cleaning with pure water 2 CO 3 , 100g / L Na 3 PO 4 12H 2 O and 12g / L Na 2 SiO 3 ) to remove surface oil stains, fully soak in 100mL of succinic acid solution, and then conduct electrodeposition (cathode current density 100 mA / cm 2 , solution temperature 60°C, pH 6, stirring rate 600rpm and deposition time 90min) to obtain MOFs film;

[0057] 2) TiO 2 - Preparation of MOFs film: After adding the MOFs film obtained in step 1) into the ethanol solvent, after the wetting is sufficient, slowly add 4 mL of tetrabutyl titanate (Ti(OBu) 4 ), ultras...

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Abstract

The invention discloses a preparation method of a combination electrode of a transition metal modified TiO2-MOFs membrane, comprising the following steps: 1) preparation of MOFs membrane material; 2)preparation of TiO2-MOFs membrane; 3) preparation of the combination electrode of the transition metal modified TiO2-MOFs membrane. The invention further discloses the combination electrode of the transition metal modified TiO2-MOFs membrane and application of the combination electrode. The combination electrode of the transition metal modified TiO2-MOFs membrane can prepare electrochemical and photocatalytic electrode materials and can be used for a photoelectric coupling water treatment system. The preparation method has advantages of convenient material drawing, simple process and operation, and low cost, and the combination electrode has high photoelectric catalytic activity and stable property, and can effectively treat water pollution. The combination electrode of the transition metal modified TiO2-MOFs membrane composite prepared by the preparation method has broad application prospects in removing organic filter pollutants by photocoupling degradation.

Description

technical field [0001] The invention belongs to the field of water treatment and relates to a transition metal modified TiO 2 -Composite electrode of MOFs film and its preparation method and application, specifically related to the use of transition metals to modify TiO 2 -Application of composite electrode of MOFs film in water pollution treatment or degradation of organic light filter in photo / electrochemical coupling system. Background technique [0002] Organic UV Filters (OUVFs) refer to aromatic organic compounds with carbonyl conjugates or heterocyclic rings, which can strongly and selectively absorb ultraviolet light. They are widely used in sunscreens, cosmetics and personal care products. In addition, OUVFs are also added to products such as household products, textiles, plastics, optical products, agricultural chemicals and coatings to protect materials from aging and yellowing. The increase in people's demand for sun protection has promoted the rapid growth of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/38C02F1/461C02F1/72C02F1/32
CPCB01J31/38B01J35/004B01J35/065C02F1/32C02F1/46109C02F1/722C02F1/725
Inventor 姚晶晶李海普杨兆光张凤琳董晴晴
Owner CENT SOUTH UNIV
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