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Mpg-C3N4/BiPO4 compound photocatalyst and preparing method and application thereof

A mpg-c3n4, catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as composite photocatalysts that have not been reported, achieve excellent photocatalytic performance, and the process is simple and easy The effect of easy control and experimental conditions

Inactive Publication Date: 2016-01-06
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] To date, the preparation of mpg-C 3 N 4 / BiPO 4 The work of composite photocatalysts has not been reported yet, and there are no patents and literature reports on the preparation of mpg-C 3 N 4 / BiPO 4 composite photocatalyst

Method used

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  • Mpg-C3N4/BiPO4 compound photocatalyst and preparing method and application thereof
  • Mpg-C3N4/BiPO4 compound photocatalyst and preparing method and application thereof
  • Mpg-C3N4/BiPO4 compound photocatalyst and preparing method and application thereof

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Experimental program
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Embodiment 1

[0030] Step 1: be that melamine is dissolved in silica sol (containing the SiO that massfraction is 40% in silica sol by mass ratio is 10:25 2 , and SiO 2 The average particle size is 12nm), heated and stirred at 100°C until the solvent was evaporated to dryness to obtain a white solid, which was pulverized and put into a muffle furnace, calcined at 550°C for 4 hours, cooled and ground to obtain a yellow powder. The yellow powder is dispersed in 200 mL of NH with a concentration of 4 mol / L 4 HF 2 solution, stirred for 48h to remove SiO 2 The template was washed three times with deionized water and ethanol, and finally dried at 80 °C for 10 h to obtain mesoporous graphite phase carbon nitride (mpg-C 3 N 4 ) powder; prepared mpg-C 3 N 4 The degradation rate of Rhodamine B can reach 92.3% after the powder is irradiated with ultraviolet light for 8 minutes, and the degradation rate of RhB can reach 90.9% after 40 minutes of visible light irradiation.

[0031] Step 2: Na 3 ...

Embodiment 2

[0034] Step 1 and step 2 are the same as step 1 and step 2 of embodiment 1.

[0035] Step 3: Convert mpg-C 3 N 4 Add the powder into ethanol and ultrasonically disperse for 3 hours, then add BiPO to it 4 The powder continued to ultrasonically disperse for 2 hours to obtain a dispersion liquid, and the mpg-C in the dispersion liquid 3 N 4 Powder and BiPO 4 The mass ratio of the powder is 50:50, and the mpg-C in the dispersion 3 N 4 The concentration of the powder is 6g / L, BiPO 4 The concentration of the powder is 6g / L; then the dispersion is continuously stirred at room temperature for 24 hours to obtain a mixed solution, and finally the mixed solution is washed 3 times with deionized water and absolute ethanol, and then dried at a constant temperature at 80°C for 10 hours. get mpg-C 3 N 4 / BiPO 4 composite photocatalyst. mpg-C produced 3 N 4 / BiPO 4 The composite photocatalyst can degrade 92.7% of Rhodamine B after 8 minutes of ultraviolet light irradiation, and ...

Embodiment 3

[0037] Step 1 and step 2 are the same as step 1 and step 2 of embodiment 1.

[0038] Step 3: Convert mpg-C 3 N 4 Add the powder into ethanol and ultrasonically disperse for 3 hours, then add BiPO to it 4 The powder continued to ultrasonically disperse for 2 hours to obtain a dispersion liquid, and the mpg-C in the dispersion liquid 3 N 4 Powder and BiPO 4 The mass ratio of the powder is 70:30, and the mpg-C in the dispersion 3 N 4 The concentration of the powder is 8.4g / L, BiPO 4 The concentration of the powder is 3.6g / L; then the dispersion is continuously stirred at room temperature for 24 hours to obtain a mixed solution, and finally the mixed solution is washed 3 times with deionized water and absolute ethanol, and then dried at a constant temperature at 80°C for 10 hours , get mpg-C 3 N 4 / BiPO 4 composite photocatalyst. mpg-C produced 3 N 4 / BiPO 4 The composite photocatalyst can degrade 92.8% of Rhodamine B after 8 minutes of ultraviolet light irradiation,...

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Abstract

The invention discloses an mpg-C3N4 / BiPO4 compound photocatalyst and a preparing method and application thereof. The preparing method includes the steps that with melamine serving as a raw material, mpg-C3N4 powder is synthesized through a hard template method; with Bi(NO3)3.5H2O and Na3PO4.12H2O serving as raw materials, BiPO4 powder is synthesized through a microwave hydrothermal method; the mpg-C3N4 powder is put into ethyl alcohol to be dispersed ultrasonically, then the BiPO4 powder is added, ultrasonic dispersion continues, after dispersion is completed, the mixture is stirred for a period of time continuously, and the obtained product is washed and dried to obtain the mpg-C3N4 / BiPO4 compound photocatalyst. The process of the preparing method is simple and easy to control, the requirement for equipment is low, experiment conditions can be reached easily, cost is low, and the prepared mpg-C3N4 / BiPO4 compound photocatalyst has excellent photocatalytic performance, can be used for degrading organics and environmental pollutants and has wide application prospects.

Description

technical field [0001] The invention belongs to the field of functional materials, in particular to a mpg-C 3 N 4 / BiPO 4 Composite photocatalyst and its preparation method and application. Background technique [0002] In recent years, with the rapid development of modern industry, the problem of environmental pollution has become increasingly serious. Photocatalysis can not only use sunlight to decompose waste gas and industrial wastewater into small inorganic molecules such as water and carbon dioxide, but also generate hydrogen energy through photolysis of water. Therefore, photocatalysis has broad application prospects in many fields such as the environment and energy. BiPO 4 It is a new type of non-metal oxo-salt photocatalyst, which has higher photocatalytic activity than commercial P25 under ultraviolet light irradiation. However, BiPO 4 It is a broadband semiconductor photocatalyst (3.85eV), and the utilization rate of visible light is not ideal enough to meet...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/30
Inventor 谈国强折辽娜夏傲王通任慧君
Owner SHAANXI UNIV OF SCI & TECH
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