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Carbon nitride-hydrotalcite heterogeneous material as well as preparation method and application thereof

A technology of heterogeneous material and hydrotalcite, applied in the field of photocatalytic materials, can solve problems such as low efficiency, and achieve the effects of simple synthesis method, easy operation of synthesis method, and good performance of decomposing water and hydrogen evolution

Pending Publication Date: 2021-11-16
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention prepares a carbon nitride-hydrotalcite material for photocatalytic hydrogen production through an in-situ hydrothermal synthesis method, synthesizes a carbon nitride-hydrotalcite material with high-efficiency photocatalytic hydrogen evolution performance, and solves the photocatalytic hydrogen evolution reaction The problem of low efficiency

Method used

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  • Carbon nitride-hydrotalcite heterogeneous material as well as preparation method and application thereof
  • Carbon nitride-hydrotalcite heterogeneous material as well as preparation method and application thereof
  • Carbon nitride-hydrotalcite heterogeneous material as well as preparation method and application thereof

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Embodiment 1

[0032] A method for preparing a carbon nitride-hydrotalcite heterostructure for photocatalytic hydrogen production by hydrothermal method in this embodiment is specifically carried out according to the following steps:

[0033] 1) While stirring at 80°C, add 1 g of melamine into 70 times the volume of distilled water, stir for 60 min, then add 1.2 g of solid phosphorous acid, and continue stirring for 60 min;

[0034] 2) Transfer the solution obtained in step 1) to a reaction kettle, and heat it in an oven at a heating temperature of 180°C and a holding time of 10 hours;

[0035] 3) centrifuging the product obtained in step 2), the rotating speed is 4000r / min, and the centrifugation time is 3min;

[0036] 4) Put the product obtained in step 3) into a drying oven to dry at a drying temperature of 60°C and a drying time of 10 hours to obtain a precursor;

[0037] 5) Add the precursor (0.1g) obtained in step 4) to 40mL distilled water, then add 0.4mmoL nickel nitrate and 0.2mmoL...

Embodiment 2

[0043] A method for preparing a carbon nitride-hydrotalcite heterostructure for photocatalytic hydrogen production by a hydrothermal method in this embodiment is specifically carried out according to the following steps:

[0044] 1) With stirring at 80°C, add 1 g of melamine into 80 times the volume of distilled water, stir for 60 min, then add 1.2 g of solid phosphorous acid, and continue stirring for 60 min;

[0045] 2) Transfer the solution obtained in step 1) to a reaction kettle, and heat it in an oven at a heating temperature of 180°C and a holding time of 10 hours;

[0046] 3) centrifuging the product obtained in step 2), the rotating speed is 4000r / min, and the centrifugation time is 3min;

[0047] 4) Put the product obtained in step 3) into a drying oven to dry at a drying temperature of 60°C and a drying time of 10 hours to obtain a precursor;

[0048] 5) Add the precursor (0.1g) obtained in step 4) to 40mL distilled water, then add 0.8mmoL nickel nitrate and 0.4mmo...

Embodiment 3

[0054] A method for preparing a carbon nitride-hydrotalcite heterostructure for photocatalytic hydrogen production by a hydrothermal method in this embodiment is specifically carried out according to the following steps:

[0055] 1) With stirring at 80°C, add 1 g of melamine into 80 times the volume of distilled water, stir for 60 min, then add 1.2 g of solid phosphorous acid, and continue stirring for 60 min;

[0056] 2) Transfer the solution obtained in step 1) to a reaction kettle, and heat it in an oven at a heating temperature of 180°C and a holding time of 10 hours;

[0057] 3) centrifuging the product obtained in step 2), the rotating speed is 4000r / min, and the centrifugation time is 3min;

[0058] 4) Put the product obtained in step 3) into a drying oven to dry at a drying temperature of 60°C and a drying time of 10 hours to obtain a precursor;

[0059] 5) Add the precursor (0.1g) obtained in step 4) to 40mL distilled water, then add 1mmoL nickel nitrate and 0.5mmoL ...

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Abstract

The invention discloses a carbon nitride-hydrotalcite heterogeneous material as well as a preparation method and application thereof, and belongs to the technical field of photocatalytic materials. The carbon nitride-hydrotalcite heterogeneous material is synthesized in situ by synthesizing CN with a hollow hexagonal tube structure through self-assembly of melamine and phosphorous acid and a high-temperature calcination method and then growing a layer of LDH nanosheets on CN in situ through a hydrothermal method. The preparation method comprises the following steps: (1) adding melamine into distilled water, stirring, adding phosphorous acid, and stirring; (2) heating in a reaction kettle, preserving heat, centrifuging, and drying to obtain a precursor; (3) putting the precursor into distilled water, adding nickel salt and chromium salt, stirring, adding urea and a surfactant, and stirring; and (4) putting into a reaction kettle, heating, preserving heat, centrifuging, and drying to obtain the carbon nitride-hydrotalcite heterogeneous material. The material provided by the invention has a unique core (hollow tube) shell (nanosheet) structure, and has good water decomposition hydrogen evolution performance and good stability. The method is simple, easy to operate and low in cost.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials, and in particular relates to a carbon nitride-hydrotalcite heterogeneous material and its preparation method and application. Background technique [0002] In the past few decades, our country's economy has made rapid progress. With the development of modern industrial economy, energy resources are gradually reduced or even exhausted, and environmental pollution is becoming more and more serious. Energy shortage and environmental degradation are the major problems faced by human beings in the 21st century and need to be solved urgently. Therefore, the development and utilization of renewable new energy and the control and control of environmental pollution are of great significance to the development of the national economy and the realization of the strategy. Since Fujishima and Honda discovered in 1972 that the n-type semiconductor TiO 2 Since the photocatalytic decompositio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C01B3/04
CPCB01J27/24C01B3/042B01J35/39Y02E60/36
Inventor 蒋保江郭昌梁吴宝刚
Owner HEILONGJIANG UNIV