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Preparation method for metal organic framework-derived tricobalt tetroxide-modified titanium dioxide nanotube array

A metal-organic framework and nanotube array technology is applied in the field of photocatalytic degradation of pollutant materials, and achieves the effects of increasing reaction sites, simple and easy operation, and improved efficiency.

Inactive Publication Date: 2018-09-14
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In recent years, the Co 3 o 4 with TiO 2 There are many studies on the formation of p-n junctions by recombination, but the Co 3 o 4 with TiO 2 Nanotube arrays incorporate few, in which metal-organic framework-derived Co 3 o 4 with TiO 2 NTAs are even rarer

Method used

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  • Preparation method for metal organic framework-derived tricobalt tetroxide-modified titanium dioxide nanotube array
  • Preparation method for metal organic framework-derived tricobalt tetroxide-modified titanium dioxide nanotube array
  • Preparation method for metal organic framework-derived tricobalt tetroxide-modified titanium dioxide nanotube array

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preparation example Construction

[0035] see figure 1 , figure 1 It is a schematic flow chart of the preparation method of the metal-organic framework-derived tricobalt tetroxide-modified titanium dioxide nanotube array of the present invention. Such as figure 1 As shown, the present invention provides a method for preparing a metal-organic framework-derived tricobalt tetroxide-modified titanium dioxide nanotube array, comprising the following steps:

[0036] Pretreatment of titanium sheet;

[0037] Preparation of TiO by Anodic Oxidation 2 NTAs;

[0038] TiO 2 NTAs as the working electrode, platinum sheet as the counter electrode, silver / silver chloride as the reference electrode, and cobalt nitrate hexahydrate solution as the electrolyte, using a three-electrode electrochemical workstation to prepare Co(OH) 2 -TiO 2 NTAs;

[0039] Co(OH) 2 -TiO 2 NTAs were put into the reactor, and the dimethylimidazole solution with N,N-dimethylformamide as solvent was poured into the reactor for hydrothermal r...

Embodiment 1

[0060] This implementation case shows a method for preparing a metal-organic framework-derived cobalt tetroxide-modified titanium dioxide nanotube array according to the following steps:

[0061] (1) Pretreatment of the titanium sheet: Ultrasonic cleaning of the pure titanium sheet substrate with acetone, absolute ethanol and water for 20 min respectively. Using a platinum sheet electrode as a cathode, insert it into an electrolyte solution containing 98v% ethylene glycol and 2v% water (ammonium fluoride 0.5wt%) at the same time, and apply a voltage of 50V for anodic oxidation for 2h to obtain TiO 2 NTAs were calcined at 450°C for 2h in air to transform from amorphous state to anatase crystal form.

[0062] (2) Preparation of Co(OH) by electrodeposition 2 -TiO 2 NTAs. Prepare an aqueous solution of 0.005 wt% cobalt nitrate hexahydrate, the solution is uniformly dispersed and used as an electrolyte, and the TiO 2 NTAs were used as the working electrode, platinum as the c...

Embodiment 2

[0065] This implementation case shows a method for preparing a metal-organic framework-derived cobalt tetroxide-modified titanium dioxide nanotube array according to the following steps:

[0066] (1) Pretreatment of the titanium sheet: Ultrasonic cleaning of the pure titanium sheet substrate with acetone, absolute ethanol and water for 20 min respectively. Using a platinum sheet electrode as a cathode, insert it into an electrolyte solution containing 98v% ethylene glycol and 2v% water (ammonium fluoride 0.5wt%) at the same time, and apply a voltage of 50V for anodic oxidation for 2h to obtain TiO 2 NTAs were calcined at 450°C for 2h in air to transform from amorphous state to anatase crystal form.

[0067] (2) Preparation of Co(OH) by electrodeposition 2 -TiO 2 NTAs. Prepare an aqueous solution of 0.005 wt% cobalt nitrate hexahydrate, the solution is uniformly dispersed and used as an electrolyte, and the TiO 2 NTAs were used as the working electrode, platinum sheets w...

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Abstract

The invention discloses a preparation method for a metal organic framework-derived tricobalt tetroxide-modified titanium dioxide nanotube array. The method comprises the following steps: firstly performing pretreatment on a titanium sheet substrate material; performing electrochemical treatment on the treated titanium substrate material by using an ethylene glycol solution containing ammonium fluoride and water as an electrolyte, and performing calcination by using a muffle furnace to change a titanium dioxide crystal form; secondly, performing cobalt hydroxide electrodeposition by means of athree-electrode electrochemical workstation and by using cobalt nitrate hexahydrate as an electrolyte, a titanium dioxide nanotube array as a working electrode, a platinum sheet as a negative electrode and silver / silver chloride as a reference electrode; performing hydrothermal treatment on the titanium dioxide nanotube array to form ZIF-67 in situ; and finally, performing secondary calcination byusing a muffle furnace to obtain the ZIF-67-derived porous tricobalt tetroxide-modified titanium dioxide nanotube array. The method disclosed by the invention can effectively improve absorption capacity of TiO2 on visible light, promote separation of electron hole pairs, and improve photocatalytic degradation efficiency of organic pollutants.

Description

technical field [0001] The invention relates to the technical field of photocatalytic degradation of pollutant materials, in particular to a method for preparing a metal-organic framework-derived tricobalt tetroxide-modified titanium dioxide nanotube array. Background technique [0002] Today's society is facing many problems, among which the sharp increase in energy demand and a large number of environmental pollution problems have become the focus of attention, among which water pollution is the most urgent problem to be solved. Since titanium dioxide was discovered in 1972, it has attracted a large number of scholars to study it because of its good electrical conductivity, outstanding chemical stability, photoelectric properties, biocompatibility, corrosion resistance and low cost, and has been widely used in photocatalytic degradation. Pollutants, fuel-sensitized solar cells, biomedical materials, gas sensors, and photolysis of water to produce hydrogen provide new ways ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/75C25D11/26C25D9/04C02F1/30C02F101/36C02F101/38
CPCC25D9/04C25D11/26C02F1/30B01J23/005B01J23/75C02F2305/10C02F2101/36C02F2101/40C02F2101/38B01J35/39
Inventor 赖跃坤张鑫楠何吉欢董佳宁黄剑莹
Owner SUZHOU UNIV
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