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Preparation method of Pd/ZIF-67/TiO2 nanotube composite catalyst

A composite technology of ZIF-67 and nanotubes, which is applied in the field of material chemistry, can solve the problems of low utilization efficiency of visible light and large specific surface area of ​​nanotubes, and achieve the effects of high recyclability, large specific surface area and wide application prospects

Active Publication Date: 2016-05-11
CHANGCHUN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] TiO 2 Nanotubes have a large specific surface area, strong ion exchange and adsorption capabilities, and are wide-bandgap semiconductor materials (E=3.2eV). They can use ultraviolet light, which accounts for about 4% of sunlight, but the utilization efficiency of visible light is extremely low. Therefore, in order to use TiO more efficiently 2 Its photocatalytic performance must be modified to broaden its response range to visible light

Method used

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  • Preparation method of Pd/ZIF-67/TiO2 nanotube composite catalyst
  • Preparation method of Pd/ZIF-67/TiO2 nanotube composite catalyst
  • Preparation method of Pd/ZIF-67/TiO2 nanotube composite catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0030] (1) Configure 1mol / L HF and 1mol / L HNO 3 The mixed solution was used as an etchant for a 0.8 mm titanium plate, etched for 50 s, and the etched titanium plate was cleaned with deionized water.

[0031] (2) Configure NH 4 F (0.3wt%) and H 2 The ethylene glycol solution of O (1wt%) is used as the electrolyte, the pure carbon plate is used as the cathode, the titanium plate obtained in step (1) is used as the anode, and the two poles are kept at a distance of 1.5 cm, and the reaction is carried out at a constant voltage of 30V for 5h to obtain TiO 2 nanotube matrix.

[0032] (3) TiO obtained in step (2) 2 Nanotubes were annealed at 500 °C.

[0033] (4)0.57gCo(NO 3 )·6H 2 O was dissolved in 40ml of methanol solution and 0.32g of 2-methylimidazole was dissolved in 40ml of methanol solution, the two solutions were mixed, and the TiO2 nanomatrix was immersed in it to obtain ZIF-67 / TiO 2 nanotube matrix.

[0034] (5) Immerse the substrate obtained in step (4) into 0.1mo...

Embodiment 2

[0036] (1) Configure 1mol / L HF and 1.5mol / L HNO 3 The mixed solution was used as an etchant for a 0.8 mm titanium plate, etched for 40 s, and the etched titanium plate was cleaned with deionized water.

[0037] (2) Configure NH 4 F (0.35wt%) and H 2 The ethylene glycol solution of O (2wt%) is used as the electrolyte, the pure carbon plate is used as the cathode, the titanium plate obtained in step (1) is used as the anode, and the two poles are kept at a distance of 1.5 cm, and the reaction is carried out at a constant voltage of 30V for 8h to obtain TiO 2 nanotube matrix.

[0038] (3) TiO obtained in step (2) 2 The nanotubes were annealed at 550 °C.

[0039] (4)0.29gCo(NO 3 )·6H 2 O was dissolved in 20ml of methanol solution and 0.24g of 2-methylimidazole was dissolved in 20ml of methanol solution, the two solutions were mixed, and the TiO 2 ZIF-67 / TiO obtained by dipping the nano-matrix into it 2 nanotube matrix.

[0040] (5) Immerse the substrate obtained in step (...

Embodiment 3

[0042] (1) Configure 3mol / L HF and 5mol / L HNO 3 The mixed solution was used as an etchant for a 1.0 mm titanium plate, etched for 30 s, and the etched titanium plate was cleaned with deionized water.

[0043] (2) Configure NH 4 F (0.4wt%) and H 2 The ethylene glycol solution of O (2.5wt%) is used as the electrolyte, the pure carbon plate is used as the cathode, the titanium plate obtained in step (1) is used as the anode, and the two poles are kept at a distance of 2 cm, and the reaction is carried out at a constant voltage of 40V for 10h to obtain TiO 2 nanotube matrix.

[0044] (3) TiO obtained in step (2) 2 The nanotubes were annealed at 550 °C.

[0045] (4) 1.15gCo(NO 3 )·6H 2 O was dissolved in 40ml of methanol solution and 1.29g of 2-methylimidazole was dissolved in 40ml of methanol solution, the two solutions were mixed, and the TiO 2 ZIF-67 / TiO obtained by dipping the nano-matrix into it 2 nanotube matrix.

[0046] (5) Immerse the substrate obtained in step (4...

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Abstract

The invention relates to a preparation method of a Pd / ZIF-67 / TiO2 nanotube composite catalyst. The method comprises the steps of: carrying out anodic oxidation on a titanium plate as a substrate to obtain TiO2 nanotubes, annealing at 550 DEG C to obtain anatase type TiO2, immersing the TiO2 nanotube substrate in a mixed solution of Co(NO3).6H2O / methanol solution and 2-methylimidazole / methanol solution to obtain a ZIF-67 / TiO2 nanotube substrate, and immersing the ZIF-67 / TiO2 nanotube substrate to a certain concentration of PdCl2 aqueous solution to obtain the Pd / ZIF-67 / TiO2 nanotube composite material. The material has excellent capability of capturing electrons and generating more holes, has good catalysis performance in an ultraviolet-visible wide wave range, can obtain broad application prospects in the aspect of sewage treatment, and can be used for selectively carrying out catalytic reaction due to the microporous structure characteristic.

Description

technical field [0001] The patent of this invention relates to the field of material chemistry, specifically Pd / ZIF-67 / TiO 2 Preparation method of nanotube composite catalyst. Background technique [0002] In recent years, people have paid more and more attention to environmental issues, especially water pollution. How to deal with pollutants in water most efficiently has become an important issue. It is a common practice to use catalysts to photocatalyze pollutants to decompose them into harmless or low-harm substances. This process requires that the catalyst can be catalyzed under visible light and has strong recyclability. Therefore, the preparation of catalysts with such advantageous properties is of great significance for solving the problem of water pollution. [0003] TiO 2 Nanotubes have a large specific surface area, strong ion exchange and adsorption capabilities, and are wide-bandgap semiconductor materials (E=3.2eV). They can use ultraviolet light, which acc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/38B01J35/10
CPCB01J31/1691B01J31/181B01J31/38B01J35/60B01J35/39
Inventor 朱薇王元瑞李亚丰孙超
Owner CHANGCHUN UNIV OF TECH
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