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Vanadium-doped nano titanium dioxide photocatalyst and preparation method thereof

A nano-titanium dioxide and photocatalyst technology, which is applied in the field of photocatalytic materials, can solve the problems of low comprehensive performance of vanadium-doped nano-titanium dioxide materials, and achieve the effects of strong adsorption performance, good application prospect and large specific surface area.

Inactive Publication Date: 2018-09-28
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, an embodiment of the present invention provides a vanadium-doped nano-titanium dioxide photocatalyst and a preparation method thereof, the main purpose of which is to solve the problem of low comprehensive performance of vanadium-doped nano-titanium dioxide materials

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  • Vanadium-doped nano titanium dioxide photocatalyst and preparation method thereof
  • Vanadium-doped nano titanium dioxide photocatalyst and preparation method thereof
  • Vanadium-doped nano titanium dioxide photocatalyst and preparation method thereof

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Embodiment 1

[0028] (1) Add 90 mL of ethylene glycol (EG) as a solvent to a quartz cup, and add 19 mg of vanadyl acetylacetonate (VO(acac)2), in a 50°C water bath and magnetically stir for 10 minutes to VO(acac) 2 Completely dissolve to obtain a precursor solution;

[0029] (2) Measure 4 mL of isopropyl titanate (TIP, atomic ratio: V / Ti=0.5%) with a pipette, slowly drop it into a quartz cup, and continue magnetic stirring for 5 minutes to obtain a mixed solution;

[0030] (3) Inject 200mL of absolute ethanol into a 1000mL Hastelloy reaction kettle, then put the quartz cup into the kettle, and heat to 290°C for 5 hours to obtain the initial product;

[0031] (4) After the reaction is finished, the kettle body is naturally cooled to room temperature, then the sample is taken out, washed several times with alcohol and deionized water, and then dried;

[0032] (5) Put the obtained powder into a tube furnace, N 2 Annealing at 600°C for 4h under atmosphere to obtain black V-doped TiO 2 powder...

Embodiment 2

[0034] (1) Add 90 mL of ethylene glycol (EG) as a solvent to a quartz cup, and add 19 mg of vanadyl acetylacetonate (VO(acac)2), in a 50°C water bath and magnetically stir for 10 minutes to VO(acac) 2 Completely dissolve to obtain a precursor solution;

[0035] (2) Measure 4 mL of isopropyl titanate (TIP, atomic ratio: V / Ti=0.5%) with a pipette, slowly drop it into a quartz cup, and continue magnetic stirring for 5 minutes to obtain a mixed solution;

[0036] (3) Inject 200mL of isopropanol into a 1000mL Hastelloy reactor, then put the quartz cup into the kettle, and heat to 295°C for 4.5h to obtain the initial product;

[0037] (4) After the reaction is finished, the kettle body is naturally cooled to room temperature, then the sample is taken out, washed several times with alcohol and deionized water, and then dried;

[0038] (5) Put the obtained powder into a tube furnace, N 2 Annealed at 610°C for 3.5h under atmosphere to obtain black V-doped TiO 2 powder.

Embodiment 3

[0040] (1) Add 90 mL of ethylene glycol (EG) as a solvent to a quartz cup, and add 19 mg of vanadyl acetylacetonate (VO(acac)2), in a 50°C water bath and magnetically stir for 10 minutes to VO(acac) 2 Completely dissolve to obtain a precursor solution;

[0041] (2) Measure 4 mL of isopropyl titanate (TIP, atomic ratio: V / Ti=0.5%) with a pipette, slowly drop it into a quartz cup, and continue magnetic stirring for 5 minutes to obtain a mixed solution;

[0042] (3) Inject 200mL of methanol into a 1000mL Hastelloy reactor, then put the quartz cup into the kettle, and heat to 300°C for 4.2h to obtain the initial product;

[0043] (4) After the reaction is finished, the kettle body is naturally cooled to room temperature, then the sample is taken out, washed several times with alcohol and deionized water, and then dried;

[0044] (5) Put the obtained powder into a tube furnace, N 2 Annealed at 595°C for 4.5h under atmosphere to obtain black V-doped TiO 2 powder.

[0045] The pr...

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Abstract

The invention discloses a vanadium-doped nano titanium dioxide photocatalyst and a preparation method thereof, and relates to the technical field of photocatalytic materials. The preparation method comprises the following steps of: mixing isopropyl titanate, a vanadium source and an organic solvent in a container to obtain a mixed solution, placing the container in a hydrothermal reaction kettle containing anhydrous ethanol, keeping constant temperature at 290-300 DEG C for 4-6 h so as to obtain an initial product, and annealing the initial product in an inert atmosphere at 580-620 DEG C for 4-5 h to obtain the black vanadium-doped titanium dioxide powder. The prepared V / TiO2 is of a nano sheet shape with a length of about 200 nm, a nano tubular shape is formed through nano-particle self-assembly, and particles have a large specific surface area and strong adsorption performance; the preparation method has simple process procedures and good experiment repeatability, and the obtained nano particles have a good application prospect in the field of photocatalysis.

Description

technical field [0001] The invention relates to the technical field of photocatalytic materials, in particular to a vanadium-doped nano titanium dioxide photocatalyst and a preparation method thereof. Background technique [0002] Nano-TiO 2 Due to its excellent physical and chemical properties, it has been widely used in environmental engineering, energy conversion and other fields. However, TiO 2 There are also certain defects in its own performance, the most notable of which is TiO 2 The most common anatase phase crystal for photocatalysts has a band gap of 3.2eV, that is, it can only absorb light above the ultraviolet region (≥387nm), and the utilization rate of sunlight is extremely low. Therefore, many scholars have been working on it in recent decades. Engaged in widening TiO 2 Visible light response range. [0003] In the energy band engineering of titanium dioxide, the most widely used and simplest method is to use TiO 2 Doping is performed to introduce impuri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/22B01J35/02B01J37/08B01J37/10B01J35/00
CPCB01J23/22B01J37/08B01J37/10B01J35/50B01J35/39B01J35/40
Inventor 马永青陈正孙筱雨刘畅钱旎娴
Owner ANHUI UNIVERSITY