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Vanadium-doped zirconium titanate photocatalytic material as well as preparation method and application thereof

A photocatalytic material, zirconium titanate technology, applied in the field of photocatalytic materials, can solve the problems of cost barriers and high scarcity of precious metal materials, and achieve the effect of improved absorption intensity, good cycle stability, smoothness and continuity

Active Publication Date: 2021-07-09
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this article only studied the effect of cerium doping amount and cerium oxidation state on the structure and properties of zirconium titanate, and did not apply it to the actual field of photocatalytic degradation of antibiotics
In recent years, doping noble metals into semiconductors can improve the internal quantum transport and change the charge carrier density of the material, thereby enhancing its photoelectrochemical performance, but the scarcity and high cost of noble metal materials hinder its large-scale practical application

Method used

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  • Vanadium-doped zirconium titanate photocatalytic material as well as preparation method and application thereof
  • Vanadium-doped zirconium titanate photocatalytic material as well as preparation method and application thereof
  • Vanadium-doped zirconium titanate photocatalytic material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A method for preparing a vanadium-doped zirconium titanate photocatalytic material, comprising the following steps:

[0048] (1) 1.2g zirconium oxychloride octahydrate, 1.27g tetrabutyl titanate and 1.0g citric acid were dissolved in 12mL methanol, and then 0.6mL mass concentration was added dropwise to be 37wt% hydrochloric acid solution to adjust the mixing system The pH value is 3.0, finally add 0.013g of ammonium metavanadate, stir for 60min, and obtain the precursor solution;

[0049] (2) Add 0.8g of polyvinylpyrrolidone (PVP) to the precursor solution prepared in step (1), stir until forming a homogeneously mixed precursor sol; %, electrospinning was carried out at room temperature, the spinning receiving distance was 20 cm, and the advancing speed was 1 mL / h to obtain precursor fibers.

[0050] (3) Dry the precursor fiber prepared in step (2) at 40°C for 16h, then place it in a muffle furnace, raise the temperature to 700°C at a heating rate of 2°C / min, and keep...

Embodiment 2

[0055] A method for preparing a vanadium-doped zirconium titanate photocatalytic material, comprising the following steps:

[0056] (1) 1.1g zirconium oxychloride octahydrate, 1.16g tetrabutyl titanate and 0.8g citric acid are dissolved in the methanol of 15mL, then dropwise add 0.8mL mass concentration to be 99wt% acetic acid, adjust the mixing system The pH value is 4.0, finally add 0.03g of sodium vanadate, and stir for 40min to obtain the precursor solution;

[0057] (2) Add 1.2g of polyvinylpyrrolidone (PVP) to the precursor solution prepared in step (1), and stir until forming a homogeneously mixed precursor sol; %, electrospinning was carried out at room temperature, the spinning receiving distance was 20 cm, and the advancing speed was 1.2 mL / h to obtain precursor fibers.

[0058] (3) Dry the precursor fiber prepared in step (2) at 60°C for 12h, then place it in a muffle furnace, raise the temperature to 800°C at a rate of 2°C / min, and keep it at 800°C for 200min to o...

Embodiment 3

[0060] A method for preparing a vanadium-doped zirconium titanate photocatalytic material, comprising the following steps:

[0061] (1) 1.4g zirconium oxychloride octahydrate, 1.48g tetrabutyl titanate and 1.3g citric acid were dissolved in 14mL methanol, and then 0.8mL mass concentration was added dropwise to be 37wt% hydrochloric acid solution to adjust the mixing system The pH value is 2.0, finally add 0.013g ammonium metavanadate, stir for 60min, and obtain the precursor solution;

[0062] (2) Add 1.4g polyvinylpyrrolidone (PVP) to the precursor solution prepared in step (1), stir until forming a homogeneously mixed precursor sol; the gained precursor sol is 20kV in pressure, and the relative humidity is 30% , electrospinning was carried out at room temperature, the spinning receiving distance was 15 cm, and the advancing speed was 0.8 mL / h, to obtain precursor fibers.

[0063] (3) Dry the precursor fiber prepared in step (2) at 50°C for 14h, then place it in a muffle fur...

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Abstract

The invention provides a vanadium-doped zirconium titanate photocatalytic material as well as a preparation method and application thereof. The preparation method of the vanadium-doped zirconium titanate photocatalytic material comprises the following steps: dissolving zirconium oxychloride, tetrabutyl titanate and citric acid in methanol, dropwise adding an acid solution, adjusting the pH value of a mixed system to 2.0-4.0, adding a vanadium source, and uniformly stirring to obtain a precursor solution; adding polyvinylpyrrolidone into the precursor solution, and uniformly stirring and mixing to obtain precursor sol; then carrying out electrostatic spinning at room temperature to obtain precursor fibers; and drying and calcining the obtained precursor fiber to obtain the vanadium-doped zirconium titanate photocatalytic material. The photocatalytic material has high photocatalytic efficiency and a good catalytic degradation effect on TC and the like, the preparation method and process equipment of the photocatalytic material are simple and easy to operate, samples are evenly distributed and good in continuity, no waste water or waste gas is discharged in the preparation process, the photocatalytic material is environmentally friendly, and the photocatalytic material has the potential of large-scale production.

Description

technical field [0001] The invention relates to a vanadium-doped zirconium titanate photocatalytic material and a preparation method and application thereof, belonging to the technical field of photocatalytic materials. Background technique [0002] Photocatalysis is considered to be an effective technical means to solve the problem of environmental degradation. Therefore, many researchers have been focusing on the preparation and application of photocatalysts for purifying the environment. where TiO 2 Due to its good physical and chemical stability, low cost and safety, it has been favored by scholars. However, the low quantum yield and poor visible-light photocatalytic efficiency under sunlight irradiation limit the TiO 2 further application. Therefore, in order to improve the efficiency of photocatalysis, various oxide materials have been intensively studied. [0003] with TiO 2 Compared with the new ternary oxide semiconductor zirconium titanate (ZrTiO 4 ) has att...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/22B01J37/03B01J37/34B01J37/08B01J35/06C02F1/30C02F101/34C02F101/38
CPCB01J23/22B01J37/036B01J37/082B01J37/342C02F1/30C02F2101/34C02F2101/38C02F2305/10B01J35/39B01J35/58Y02W10/37
Inventor 卢启芳李雪丁伟宸魏明志郭恩言
Owner QILU UNIV OF TECH
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