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Black phosphorus/g-C3N4 composite visible light photocatalytic material as well as preparation method and application thereof

A photocatalytic material, g-c3n4 technology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of poor photocatalytic efficiency and high recombination rate of photogenerated electrons and holes, Achieve the effects of low cost, improved photocatalytic efficiency, and simple preparation scheme

Active Publication Date: 2018-08-03
HUBEI MOPHOS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high recombination rate of photogenerated electrons and holes makes g-C 3 N 4 The photocatalytic efficiency is poor, so in order to improve the g-C 3 N 4 The photocatalytic efficiency of g-C needs to be 3 N 4 carry out modifications

Method used

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  • Black phosphorus/g-C3N4 composite visible light photocatalytic material as well as preparation method and application thereof
  • Black phosphorus/g-C3N4 composite visible light photocatalytic material as well as preparation method and application thereof
  • Black phosphorus/g-C3N4 composite visible light photocatalytic material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A kind of black phosphorus / g-C 3 N 4 The preparation method of composite visible light photocatalytic material comprises the following steps:

[0037] 1) Weigh 10g of urea and place it in a corundum crucible, place it in a muffle furnace, raise the temperature from room temperature to 550°C at a rate of 2.2°C / min, then keep it warm for 120min, then cool down to room temperature within 120min, and grind to obtain g-C 3 N 4 ;

[0038] 2) Weigh 100 mg of black phosphorus crystals and grind them with a mortar, then add 100 mL of N-methylpyrrolidone solvent, conduct probe ultrasound, ice-water bath ultrasound, and then centrifuge with absolute ethanol to clean, take the precipitate at a centrifugal speed of 4000r / min, Black phosphorus powder can be prepared by vacuum drying; among them, the conditions of ultrasonic treatment of the probe are controlled as follows: ultrasonic power is 1000W, ultrasonic time is 5h; the conditions of ice-water bath ultrasonic treatment are c...

Embodiment 2

[0043] A kind of black phosphorus / g-C 3 N 4 The preparation method of composite visible light photocatalytic material comprises the following steps:

[0044] 1) Weigh 10g of urea and place it in a corundum crucible, place it in a muffle furnace, raise the temperature from room temperature to 550°C at a rate of 2.2°C / min, then keep it warm for 120min, then cool down to room temperature within 120min, and grind to obtain g-C 3 N 4 ;

[0045] 2) Weigh 100mg of black phosphorus crystals and grind them with a mortar, then add 50mL of N-methylpyrrolidone solvent, conduct probe ultrasound, ice-water bath ultrasound, and then centrifugally clean with absolute ethanol, take the precipitate at a centrifugal speed of 4000r / min, Black phosphorus powder can be prepared by vacuum drying; among them, the conditions of ultrasonic treatment of the probe are controlled as follows: ultrasonic power is 600W, ultrasonic time is 6h; the conditions of ice-water bath ultrasonic treatment are contr...

Embodiment 3

[0048] A kind of black phosphorus / g-C 3 N 4 The preparation method of composite visible light photocatalytic material comprises the following steps:

[0049] 1) Weigh 10g of urea and place it in a corundum crucible, place it in a muffle furnace, raise the temperature from room temperature to 550°C at a rate of 2.2°C / min, then keep it warm for 120min, then cool down to room temperature within 120min, and grind to obtain g-C 3 N 4 ;

[0050] 2) Weigh 100 mg of black phosphorus crystals and grind them with a mortar, then add 100 mL of N-methylpyrrolidone solvent, conduct probe ultrasound, ice-water bath ultrasound, and then centrifuge with absolute ethanol to clean, take the precipitate at a centrifugal speed of 4000r / min, Vacuum drying can prepare black phosphorus powder; among them, the conditions of ultrasonic treatment of the probe are controlled as follows: ultrasonic power is 500W, ultrasonic time is 7h; the conditions of ice-water bath ultrasonic treatment are controlle...

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Abstract

The invention discloses a black phosphorus / g-C3N4 composite visible light photocatalytic material. The black phosphorus / g-C3N4 composite visible light photocatalytic material is a product of black phosphorus and g-C3N4 by ball-milling compositing, wherein black phosphorus accounts for 0.5%-50% by weight of g-C3N4. Visible light responding semiconductor black phosphorus is subjected to ball-millingcompositing with g-C3N4 for the first time, and photocatalytic efficiency of g-C3N4 is improved effectively by constructing a heterostructure, so that the prepared black phosphorus / g-C3N4 composite visible light photocatalytic material can be used for degrading organic pollutants, is particularly applicable to degradation of organic photosensitizers and photoinitiators such as rhodamine B and hasgreat application prospect in the field of photocatalytic degradation of organic matter; the black phosphorus / g-C3N4 composite visible light photocatalytic material can be prepared with the ball-milling method, a preparation scheme is simple, and cost is low.

Description

technical field [0001] The invention belongs to the technical field of nanocomposite materials, in particular to a black phosphorus / g-C 3 N 4 Composite visible light photocatalytic material and its preparation method and application. Background technique [0002] With the development of industry and the continuous discharge of organic dye wastewater, the total amount and types of dyes entering the ecological environment have gradually increased, and the ecological pollution caused by dyes has become more and more serious. The dyes in the factory are discharged into industrial wastewater during the production process. Under natural conditions, physical and chemical reactions such as oxidation and hydrolysis will occur, and toxic by-products will be generated, which will greatly endanger the human living environment. At present, the traditional methods of pollution control, such as adsorption by physical methods, degradation by biological methods, redox by chemical methods, ...

Claims

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Application Information

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IPC IPC(8): B01J27/24C02F1/30C02F101/30
CPCC02F1/30B01J27/24C02F2305/10C02F2101/30B01J35/39
Inventor 喻学锋童睿锋王佳宏
Owner HUBEI MOPHOS TECH CO LTD
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