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Spherical bismuth vanadate/black phosphorus composite photocatalyst and preparation method thereof

A bismuth vanadate and catalyst technology, applied in the field of photocatalysis, can solve the problems of a single semiconductor photocatalyst, achieve excellent photocatalytic performance, improve stability, and uniform particle size

Pending Publication Date: 2020-12-15
DALIAN NATIONALITIES UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned technical problem of proposing a single semiconductor photocatalyst, the present invention provides a spherical bismuth vanadate / black phosphorus composite photocatalyst and its preparation method

Method used

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  • Spherical bismuth vanadate/black phosphorus composite photocatalyst and preparation method thereof
  • Spherical bismuth vanadate/black phosphorus composite photocatalyst and preparation method thereof
  • Spherical bismuth vanadate/black phosphorus composite photocatalyst and preparation method thereof

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Embodiment 1

[0039] In this embodiment, the specific steps for preparing spherical bismuth vanadate / black phosphorus composite photocatalytic material are as follows:

[0040] (1) 3.94g Bi(NO 3 ) 3 ·5H 2 O dissolved in 5 mL of concentrated HNO 3 Add water and dilute to 20mL (4mol / L), stir slowly for 10min to obtain solution A;

[0041] (2) Then 1.16g NH 4 VO 3 Dissolve in 20mL 4mol / L NaOH solution, stir evenly to obtain solution B; under constant stirring condition, slowly add solution B dropwise to solution A, at the same time adjust the pH of the mixed solution to 5.0 with 2mol / L NaOH, continue magnetic stirring After 30 minutes;

[0042] (3) Transfer the mixture of step (2) to a water bath for a constant temperature reaction at 100°C for 24 hours;

[0043] (4) After natural cooling, remove the supernatant, vacuum filter and wash with deionized water and absolute ethanol several times until neutral, dry at 80°C for 12 hours, and grind with an agate mortar for later use to obtain a...

Embodiment 2

[0049] In this embodiment, the specific steps for preparing spherical bismuth vanadate / black phosphorus composite photocatalytic material are as follows:

[0050] (1) 3.94g Bi(NO 3 ) 3 ·5H 2 O dissolved in 5 mL of concentrated HNO 3 Add water and dilute to 20mL (4mol / L), stir slowly for 10min to obtain solution A;

[0051] (2) Then 1.16g NH 4 VO 3 Dissolve in 20mL 4mol / L NaOH solution, stir evenly to obtain solution B; under constant stirring condition, slowly add solution B dropwise to solution A, at the same time adjust the pH of the mixed solution to 5.0 with 2mol / L NaOH, continue magnetic stirring After 30 minutes;

[0052] (3) Transfer the mixture of step (2) to a water bath for a constant temperature reaction at 100°C for 24 hours;

[0053] (4) After natural cooling, remove the supernatant, vacuum filter and wash with deionized water and absolute ethanol several times until neutral, dry at 80°C for 12 hours, and grind with an agate mortar for later use to obtain a b...

Embodiment 3

[0059] In this embodiment, the specific steps for preparing spherical bismuth vanadate / black phosphorus composite photocatalytic material are as follows:

[0060] (1) 3.94g Bi(NO 3 ) 3 ·5H 2 O dissolved in 5 mL of concentrated HNO 3 Add water and dilute to 20mL (4mol / L), stir slowly for 10min to obtain solution A;

[0061] (2) Then 1.16gNH 4 VO 3 Dissolve in 20mL 4mol / L NaOH solution, stir evenly to obtain solution B; under constant stirring condition, slowly add solution B dropwise to solution A, at the same time adjust the pH of the mixed solution to 5.0 with 2mol / L NaOH, continue magnetic stirring After 30 minutes;

[0062] (3) Transfer the mixture of step (2) to a water bath for a constant temperature reaction at 100°C for 24 hours;

[0063] (4) After natural cooling, remove the supernatant, vacuum filter and wash with deionized water and absolute ethanol several times until neutral, dry at 80°C for 12 hours, and grind with an agate mortar for later use to obtain a ...

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Abstract

The invention belongs to the technical field of photocatalysis, and particularly relates to a spherical bismuth vanadate / black phosphorus composite photocatalytic material and a preparation method andapplication thereof. The preparation method comprises the following steps: preparing bismuth vanadate by adopting a coprecipitation method, dissolving bismuth vanadate in ethanol, mixing with a blackphosphorus suspension obtained by liquid-phase ultrasonic treatment, performing ultrasonic dissolving, performing uniform mixing, transferring the mixture into a water bath kettle, and finally performing centrifuging, washing and drying to obtain the spherical bismuth vanadate / black phosphorus composite material. By adjusting the addition amounts of different black phosphorus, the degradation efficiency of the organic pollutant rhodamine B (20mg / L) under the same condition (the illumination time is 90min and the catalyst dosage is 50mg) under simulated visible light irradiation is respectively inspected. Photocatalytic results show that the bismuth vanadate / black phosphorus composite photocatalyst prepared by compounding 0.01 g of black phosphorus and bismuth vanadate has the most excellent photocatalytic performance.

Description

technical field [0001] The invention relates to the technical field of photocatalysis, in particular to a spherical bismuth vanadate / black phosphorus composite photocatalyst and a preparation method thereof. Background technique [0002] The environment and energy are the major problems that human beings face and need to be solved urgently in the 21st century. The development of photocatalytic technology and related materials has gradually become a hot spot in the research of materials science and catalysis science. However, it is difficult for a single photocatalyst to effectively absorb both ultraviolet light and visible light. In recent years, in order to improve the photocatalytic efficiency and expand the response wavelength range, the compounding of two or more materials has become the focus of research. Therefore, improving the preparation method of composite photocatalytic materials and developing composite photocatalytic materials with good performance have become ...

Claims

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Application Information

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IPC IPC(8): B01J27/198B01J35/00B01J35/02B01J35/08C02F1/30C02F101/30
CPCB01J27/198C02F1/30C02F2305/10C02F2101/30B01J35/51B01J35/40B01J35/39
Inventor 欧晓霞王东芳张诗启杨晓宇赵可
Owner DALIAN NATIONALITIES UNIVERSITY
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