Nickel hydroxide/thin-layer carbon nitride composite visible photocatalyst and preparation method thereof

A nickel hydroxide, photocatalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problems of limited large-scale application, expensive platinum, etc., and achieve good storage hole characteristics, The effect of promoting separation and mild synthesis conditions

Inactive Publication Date: 2019-04-26
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the high price of platinum will certainly limit the possibility of its large-scale application, so it is very meaningful to study new cheap, stable and efficient platinum substitute materials.

Method used

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  • Nickel hydroxide/thin-layer carbon nitride composite visible photocatalyst and preparation method thereof
  • Nickel hydroxide/thin-layer carbon nitride composite visible photocatalyst and preparation method thereof
  • Nickel hydroxide/thin-layer carbon nitride composite visible photocatalyst and preparation method thereof

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Embodiment 1

[0026] Embodiment 1: the preparation method of the nickel hydroxide / two-dimensional carbon nitride (nickel hydroxide molar number is 0.25nmol) composite photocatalyst of visible light response of the present invention, specifically comprises the following steps:

[0027] Step 1: Put 2g of melamine in a ceramic crucible with a cover, heat up to 550°C for 4 hours in a muffle furnace at a rate of 2°C / min, and calcinate the obtained yellow substance into powder, then spread 400mg of the yellow powder on the ark In a muffle furnace, the temperature was raised to 550°C at a rate of 5°C / min and calcined for 1h, and the temperature was naturally cooled to room temperature; then the temperature was raised to 550°C at a rate of 2°C / min and calcined for 1h to obtain carbon nitride with a two-dimensional sheet structure. .

[0028] The second step: take 100mg of two-dimensional carbon nitride and 0.25mmol of nickel nitrate hexahydrate and place them in deionized water for 20 minutes to di...

Embodiment 2

[0032] Embodiment 2: In order to control and optimize material performance, the preparation method of nickel hydroxide / two-dimensional carbon nitride (nickel hydroxide molarity is 0.15nmol) composite photocatalyst of visible light response of the present invention specifically comprises the following steps:

[0033] Step 1: Put 2g of melamine in a ceramic crucible with a cover, heat up to 550°C for 4 hours in a muffle furnace at a rate of 2°C / min, and calcinate the obtained yellow substance into powder, then spread 400mg of the yellow powder on the ark In a muffle furnace, the temperature was raised to 550°C at a rate of 5°C / min and calcined for 1h, and the temperature was naturally cooled to room temperature; then the temperature was raised to 550°C at a rate of 2°C / min and calcined for 1h to obtain carbon nitride with a two-dimensional sheet structure. .

[0034] The second step: take 100mg of two-dimensional carbon nitride and 0.15mmol of nickel nitrate hexahydrate and plac...

Embodiment 3

[0038] Embodiment 3: In order to further control and optimize the material performance, the preparation method of the nickel hydroxide / two-dimensional carbon nitride (nickel hydroxide molar number is 0.5nmol) composite photocatalyst of visible light response of the present invention, specific Include the following steps:

[0039] Step 1: Put 2g of melamine in a ceramic crucible with a cover, heat up to 550°C for 4 hours in a muffle furnace at a rate of 2°C / min, and calcinate the obtained yellow substance into powder, then spread 400mg of the yellow powder on the ark In a muffle furnace, the temperature was raised to 550°C at a rate of 5°C / min and calcined for 1h, and the temperature was naturally cooled to room temperature; then the temperature was raised to 550°C at a rate of 2°C / min and calcined for 1h to obtain carbon nitride with a two-dimensional sheet structure. .

[0040] The second step: take 100mg of two-dimensional carbon nitride and 0.5mmol of nickel nitrate hexahy...

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Abstract

The invention relates to a photocatalyst, in particular discloses a nickel hydroxide/thin-layer carbon nitride composite visible photocatalyst and a preparation method thereof and belongs to the technical field of nano materials and photolysis water hydrogen generation. According to the photocatalyst, two-dimensional carbon nitride of a large specific surface area and two-dimensional nickel hydroxide are compounded, then the two-dimensional carbon nitride and the two-dimensional nickel hydroxide take a mutual synergistic effect into play, metallic valence of the nickel hydroxide is changed byvirtue of photocatalyst semiconductor valence band oxidability through oxidation to form an internal circulation, and a photon-generated carrier is promoted to transfer to accelerate separation of photon-generated electron hole pairs. Under a condition that no promoter platinum is available, continuous and stable water decomposition and hydrogen generation is achieved by a promoter two-dimensionalcarbon nitride semiconductor under radiation of visible light.

Description

technical field [0001] The invention relates to a photocatalyst, in particular to a nickel hydroxide / thin-layer carbon nitride composite visible light photocatalyst and a preparation method thereof, and belongs to the technical field of nanomaterials and hydrogen production by photolysis of water. Background technique [0002] Since entering the 21st century, environmental and energy crises have become the most severe and unresolved problems in the world. So far, the energy that human beings rely on for survival is still the traditional fossil energy dominated by coal and oil. This kind of energy has brought inevitable pollution while promoting human development. More importantly, the non-renewability of fossil energy determines that they will be used up after a few years. As a green energy with high energy density, hydrogen energy is a candidate energy that may replace traditional fossil energy in the future. Solar energy is an inexhaustible natural energy, and using sola...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C01B3/04
CPCB01J27/24B01J35/0013B01J35/004C01B3/042Y02E60/36
Inventor 许晖郝全果李华明佘小杰莫曌宜坚坚
Owner JIANGSU UNIV
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