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V-Ni2P/g-C3N4 photocatalyst as well as preparation method and application thereof

A photocatalyst, g-c3n4 technology, applied in the field of photocatalysis, achieves the effect of low production cost, easy control of conditions, and improved hydrogen production efficiency

Pending Publication Date: 2022-03-04
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although Patent 1 (Chinese Publication No. CN108940340A) discloses a kind of g-C 3 N 4 -Ni 2 The preparation method of P composite material, but the g-C in the composite material prepared by it 3 N 4 and Ni 2 The mass ratio of P is as high as 10:3, and it combines Ni(OH) 2 with NaH 2 PO 2 Mixed calcination is easy to introduce impurity sodium element

Method used

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  • V-Ni2P/g-C3N4 photocatalyst as well as preparation method and application thereof
  • V-Ni2P/g-C3N4 photocatalyst as well as preparation method and application thereof
  • V-Ni2P/g-C3N4 photocatalyst as well as preparation method and application thereof

Examples

Experimental program
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preparation example Construction

[0037] g-C 3 N 4 Preparation of the matrix. For example, g-C 3 N 4 It can be calcined in a muffle furnace. First, put 10g-15g of melamine into a porcelain boat, calcining at 450°C-600°C, holding time for 1h-5h, and heating rate at 2-10°C / min to obtain block g-C 3 N 4 . Then take out the sample and grind for 30min~60min, take 1g~5g block g-C 3 N 4 , add 100-200mLmL ethanol and sonicate for 5h-10h, then centrifuge and wash three times with deionized water, dry at 60°C-80°C for 6h-12h, take out and grind for later use.

[0038] The nickel chloride and the vanadium chloride are dissolved in water, and the pH value is adjusted to 3-5 with an acid solution to obtain a mixed solution A. Wherein, nickel chloride (nickel chloride hexahydrate) and vanadium chloride are compounded according to the following molar ratio, nickel chloride hexahydrate: vanadium chloride=(1~6):(1~3). Nickel chloride and vanadium chloride can also be prepared into solutions of different concentration...

Embodiment 1

[0048] (1) First, put 15g of melamine into a porcelain boat, calcine at 550°C, hold for 4 hours, and heat up at 2°C / min to obtain block g-C 3 N 4 , remove the sample and grind for 60 min. Take 1g block g-C 3 N 4 , add 100mL ethanol and sonicate for 6h, then centrifuge and wash three times with deionized water, dry at 60°C for 10h, take out and grind for later use;

[0049] (2) Add 10mL of 0.2mol / L nickel chloride hexahydrate solution and 10mL of 0.04mol / L vanadium chloride solution in a 50mL beaker, nickel chloride hexahydrate and vanadium chloride shall be proportioned according to the following molar ratio, hexahydrate Nickel chloride:vanadium chloride=5:1. Then add 0.005 mol / L hydrochloric acid solution to adjust the pH value to 4, and magnetically stir for 15 min to obtain a mixed solution A. Then pour the mixed solution A into one side of the two-chamber hydrothermal kettle;

[0050] (3) Add 20mL deionized water and 10mL ethylene glycol into a 100mL beaker, then add...

Embodiment 2

[0060] (1) First, put 10 g of melamine into a porcelain boat, calcine at a temperature of 550°C, hold for 3 hours, and heat up at a rate of 5°C / min to obtain block g-C 3 N 4 . Take out the sample and grind it for 60min, take 2g block g-C 3 N 4 , add 200mLmL ethanol and sonicate for 10h, then centrifuge and wash three times with deionized water, dry at 80°C for 12h, take out and grind for later use;

[0061] (2) Add 5mL of 0.4mol / L nickel chloride hexahydrate solution and 15mL of 0.034mol / L vanadium chloride solution in a 50mL beaker, nickel chloride hexahydrate and vanadium chloride shall be proportioned according to the following molar ratios, hexahydrate Nickel chloride:vanadium chloride=4:1, then add 0.008mol / L hydrochloric acid solution to adjust the pH value to 5, and magnetically stir for 20min to obtain mixed solution A. Then pour the mixed solution A into one side of the two-chamber hydrothermal kettle;

[0062] (3) Add 30mL deionized water and 20mL ethylene glyco...

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Abstract

The invention relates to a V-Ni2P / g-C3N4 photocatalyst as well as a preparation method and application thereof, the V-Ni2P / g-C3N4 photocatalyst is a composite material of V-Ni2P and g-C3N4, and the V-Ni2P has a spherical structure formed by nanosheets; the mass ratio of the V-Ni2P to the g-C3N4 is (0.01 to 0.2): 1.

Description

technical field [0001] The present invention relates to a kind of V-Ni 2 P / g-C 3 N 4 Photocatalyst and its preparation method and application, specifically related to the preparation of V-Ni by liquid phase and solid phase methods 2 P / g-C 3 N 4 The composite material belongs to the technical field of photocatalysis. Background technique [0002] As an environmentally friendly and efficient energy source, hydrogen occupies a very important position in the current energy research field. Using photolysis of water to produce hydrogen is more in line with the concept of sustainability. Similarly, finding environmentally friendly and efficient catalysts has always been the goal of researchers. g-C 3 N 4 As a non-precious metal catalyst, it has been widely used in the photo-splitting of water to produce hydrogen, and the search for co-catalysts with excellent performance still stimulates the interest of a large number of researchers. [0003] To date, modification of g-C u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/198B01J27/24B01J35/00B01J35/08C01B3/04
CPCB01J27/198B01J27/24C01B3/042C01B2203/1088C01B2203/1094B01J35/51B01J35/39B01J37/035B01J37/082B01J37/10Y02E60/36B01J23/8472B01J37/04C01B2203/0277B01J37/009B01J37/06
Inventor 黄剑锋肖婷冯亮亮曹丽云牛梦凡刘倩倩张晓
Owner SHAANXI UNIV OF SCI & TECH
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