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FeVO4@g-C3N4 core-shell structure heterojunction photocatalyst and preparation method thereof

A technology of photocatalyst and core-shell structure, which is applied in the direction of physical/chemical process catalysts, chemical instruments and methods, water/sludge/sewage treatment, etc. It can solve the problems of unsatisfactory application effects, low photocatalytic performance, and small specific surface area, etc. problems, to achieve good application prospects, high photocatalytic activity, and simple operation

Active Publication Date: 2018-02-09
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, g-C prepared by traditional thermal polymerization 3 N 4 The small specific surface area and the easy recombination of photogenerated electron-hole pairs lead to low photocatalytic performance, and the actual application effect is not ideal

Method used

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  • FeVO4@g-C3N4 core-shell structure heterojunction photocatalyst and preparation method thereof
  • FeVO4@g-C3N4 core-shell structure heterojunction photocatalyst and preparation method thereof
  • FeVO4@g-C3N4 core-shell structure heterojunction photocatalyst and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Step 1: Add 1mmol of FeCl 3 ·6H 2 O and 1 mmol of NH 4 VO 3 After adding to 45mL deionized water and stirring, adjust its pH to 2 with NaOH solution, and stir at room temperature to obtain FeVO 4Precursor, the FeVO 4 The precursor solution was transferred to a hydrothermal reaction kettle and reacted at 180°C. After the reaction was completed and the temperature dropped to room temperature, the supernatant was removed by standing, and the precipitate was washed with deionized water and absolute ethanol, and dried at 70°C. After drying and grinding, a yellow-brown powder is obtained;

[0023] Step 2: add urea into deionized water, stir and then ultrasonically disperse to obtain an aqueous urea solution with a concentration of 0.2 g / mL;

[0024] Step 3: Conversion of urea to g-C 3 N 4 1% of the mass fraction is added to the urea aqueous solution, and the yellow-brown powder is stirred evenly to obtain a mixed solution, and the mixed solution is heated and stirred u...

Embodiment 2

[0027] Step 1: Add 1mmol of FeCl 3 ·6H 2 O and 1 mmol of NH 4 VO 3 After adding to 45mL deionized water and stirring, adjust its pH to 2 with NaOH solution, and stir at room temperature to obtain FeVO 4 Precursor, the FeVO 4 The precursor solution was transferred to a hydrothermal reaction kettle and reacted at 180°C. After the reaction was completed and the temperature dropped to room temperature, the supernatant was removed by standing, and the precipitate was washed with deionized water and absolute ethanol, and dried at 70°C. After drying and grinding, a yellow-brown powder is obtained;

[0028] Step 2: adding urea into deionized water, stirring and then ultrasonically dispersing to obtain an aqueous urea solution with a concentration of 0.4 g / mL;

[0029] Step 3: Conversion of urea to g-C 3 N 4 2% of the mass fraction is added to the urea aqueous solution, and the yellow-brown powder is stirred evenly to obtain a mixed solution, and the mixed solution is heated and...

Embodiment 3

[0032] Step 1: Add 1mmol of FeCl 3 ·6H 2 O and 1 mmol of NH 4 VO 3 After adding to 45mL deionized water and stirring, adjust its pH to 2 with NaOH solution, and stir at room temperature to obtain FeVO 4 Precursor, the FeVO 4 The precursor solution was transferred to a hydrothermal reaction kettle and reacted at 180°C. After the reaction was completed and the temperature dropped to room temperature, the supernatant was removed by standing, and the precipitate was washed with deionized water and absolute ethanol, and dried at 70°C. After drying and grinding, a yellow-brown powder is obtained;

[0033] Step 2: add urea into deionized water and stir, then ultrasonically disperse to obtain an aqueous urea solution with a concentration of 0.5 g / mL;

[0034] Step 3: Conversion of urea to g-C 3 N 4 3% of the mass fraction is added to the urea aqueous solution, and the yellow-brown powder is stirred evenly to obtain a mixed solution, and the mixed solution is heated and stirred ...

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Abstract

The invention discloses a FeVO4@g-C3N4 core-shell structure heterojunction photocatalyst and a preparation method of the FeVO4@g-C3N4 core-shell structure heterojunction photocatalyst. The preparationmethod comprises the following steps: preparing a yellowish-brown powder Fe0.33V2O5 through a hydrothermal reaction, adding the yellowish-brown powder into an aqueous urea solution, drying and grinding to obtain a mixed powder, and finally calcining the mixed powder in a muffle furnace to obtain the FeVO4@g-C3N4 core-shell structure heterojunction photocatalyst. The FeVO4@g-C3N4 core-shell structure heterojunction photocatalyst is synthetized by adopting a hydrothermal-calcining method. The method is simple in operation, the reaction condition is relatively mild, and the prepared FeVO4@g-C3N4core-shell structure heterojunction photocatalyst has an adsorption property, a degradation property and recyclable degradation stability for organic pollutants, and has an excellent application prospect in the aspect of degradation of the organic pollutants.

Description

technical field [0001] The invention belongs to the field of functional materials, in particular to a FeVO 4 @g-C 3 N 4 A core-shell structure heterojunction photocatalyst and a preparation method thereof. Background technique [0002] At present, environmental pollution is serious, which seriously threatens people's health. Semiconductor photocatalysis technology uses solar energy to degrade pollutants, which has the advantages of low energy consumption and no secondary pollution. Therefore, semiconductor photocatalysis technology has broad development prospects. [0003] Graphite-like carbon nitride (g-C 3 N 4 ) has attracted much attention due to its excellent thermal and chemical stability, easy control of structure and properties, and strong response to visible light. g-C 3 N 4 The preparation methods mainly include thermal polymerization method, electrochemical deposition method, high-temperature solid-state reaction method and solvothermal method, among which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C02F1/30C02F101/30
CPCC02F1/30B01J27/24C02F2101/308B01J35/396B01J35/39
Inventor 谈国强张丹刘婷王敏李斌任慧君夏傲
Owner SHAANXI UNIV OF SCI & TECH
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