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Zero-dimensional/one-dimensional heterostructure bismuth vanadate/zirconia nanobelt photocatalyst and preparation method thereof

A heterostructure, photocatalyst technology, applied in the field of photocatalysis, can solve the problems of unsatisfactory photocatalytic activity, reduce electron-hole recombination, etc., and achieve the effect of improving photocatalytic activity, enhancing absorption capacity, and improving photocatalytic efficiency

Inactive Publication Date: 2019-07-12
QILU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, after long-term research, it has been found that although its light absorption range is larger, the photocatalytic activity of a single bismuth vanadate semiconductor photocatalyst is not ideal due to its high electron-hole recombination rate. Can effectively reduce the recombination of electron holes

Method used

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  • Zero-dimensional/one-dimensional heterostructure bismuth vanadate/zirconia nanobelt photocatalyst and preparation method thereof
  • Zero-dimensional/one-dimensional heterostructure bismuth vanadate/zirconia nanobelt photocatalyst and preparation method thereof
  • Zero-dimensional/one-dimensional heterostructure bismuth vanadate/zirconia nanobelt photocatalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Put 0.730g of sodium oleate in 80mL of deionized water and stir at room temperature for 30min to obtain sodium oleate solution A with a mass concentration of about 0.1%;

[0032] (2) Add 0.097g of bismuth nitrate and 0.080g of ammonium metavanadate into solution A, and stir at room temperature for 10~10min;

[0033] (3) Add solution A into the reaction kettle and heat the reaction in an oven at 90°C for 8 hours;

[0034] (4) Centrifuging the solution after the reaction for several times and washing the obtained substance with ethanol and deionized water several times to obtain bismuth vanadate quantum dots;

[0035] (5) Dissolve 1.0g polyvinylpyrrolidone (PVP) in a mixed solvent of 10mL N,N-dimethylformamide and 1mL deionized water and stir evenly to obtain solution B;

[0036] (6) Add 0.064g of zirconium oxychloride and 0.065g of bismuth vanadate quantum dots to solution B, ultrasonicate for 20-40min, then stir at room temperature for 2h to obtain a spinnable sol;...

Embodiment 2

[0041] (1) Put 0.730g of sodium oleate in 80mL of deionized water and stir at room temperature for 30min to obtain sodium oleate solution A with a mass concentration of about 0.1%;

[0042] (2) Add 0.097g of bismuth nitrate and 0.080g of ammonium metavanadate into solution A, and stir at room temperature for 10~10min;

[0043] (3) Add solution A into the reaction kettle and heat the reaction in an oven at 90°C for 6 hours;

[0044] (4) Centrifuge the solution after the reaction for several times and wash the obtained substance with ethanol and deionized water several times to obtain bismuth vanadate quantum dots.

Embodiment 3

[0046] (1) Dissolve 1.0g polyvinylpyrrolidone (PVP) in a mixed solvent of 10mL N,N-dimethylformamide and 1mL deionized water and stir to obtain solution A;

[0047] (2) Add 0.064g of zirconium oxychloride to solution A, ultrasonicate for 20~40min, then stir at room temperature for 2h to obtain spinnable sol;

[0048] (3) Add the prepared spinnable sol into the syringe needle for electrospinning;

[0049] (4) Calcining the fiber membrane prepared by electrospinning to obtain zirconia nanobelts.

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Abstract

The invention discloses a zero-dimensional / one-dimensional heterostructure bismuth vanadate / zirconia nanobelt photocatalyst and a preparation method thereof. The preparation method concretely comprises the following steps: preparing bismuth vanadate quantum dots by a hydrothermal process, adding zirconium oxychloride and the bismuth vanadate quantum dots to a DMF and water solution of PVP, carrying out ultrasonic and stirring treatment achieve uniform mixing in order to generate an electrospinning sol, carrying out an electrospinning process to form a BiVO4 / ZrO2 film, and calcining the BiVO4 / ZrO2 film to obtain the BiVO4 / ZrO2 nanobelt photocatalyst. The BiVO4 / ZrO2 nanobelt photocatalyst is prepared by combining the hydrothermal process, the electrospinning process and the calcination process, so the BiVO4 quantum dots are uniformly loaded on ZrO2 nanobelts, thereby the specific surface area of the catalyst is greatly increased, and the photocatalyst has many active sites; and the formation of the heterostructure effectively promotes the electron transport efficiency and reduces the recombination rate of electron holes, so the prepared catalyst has a very high photocatalytic activity.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, in particular to a preparation method of bismuth vanadate quantum dots and zirconia nanobelt materials. Background technique [0002] In today's society with rapid development of science and technology and developed industrial economy, the control of environmental pollution has become one of the most important problems people face. Due to its environmental friendliness, the application of photocatalysis in the control of environmental pollution has attracted more and more attention. It can be used in various aspects, such as water purification, sterilization, self-cleaning, air purification, anti-fog and heat dissipation, etc., and because of its advantages such as low cost and high efficiency, semiconductor photocatalysts have gradually become a research topic in the field of water pollution treatment. hotspot. [0003] Traditional photocatalyst TiO 2 Since 1972, Fujishima and Honda (N...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/22B01J35/06B01J37/08B82Y30/00B82Y40/00C02F1/30C02F101/30C02F101/34C02F101/38
CPCB01J23/22B01J37/082B82Y30/00B82Y40/00C02F1/30C02F2101/308C02F2101/34C02F2101/38C02F2101/30C02F2305/10B01J35/39B01J35/59
Inventor 魏明志马超群卢启芳郭恩言
Owner QILU UNIV OF TECH
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