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S-type heterojunction catalyst as well as preparation method and application thereof

A catalyst and heterojunction technology, applied in chemical instruments and methods, physical/chemical process catalysts, carbon monoxide, etc., can solve problems such as unsatisfactory catalytic effects, achieve improved CO generation rate, low cost, and high light utilization efficiency Effect

Active Publication Date: 2022-01-28
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Currently, LDHs-based heterojunctions are used for efficient CO 2 There are very few reports on photocatalytic conversion, and the catalytic effect is not satisfactory

Method used

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  • S-type heterojunction catalyst as well as preparation method and application thereof
  • S-type heterojunction catalyst as well as preparation method and application thereof
  • S-type heterojunction catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Synthesis of MIL-68(In) Catalyst

[0052] Take 60mg In(NO 3 ) 3 ·xH 2 O and 60mg of terephthalic acid were dissolved in 40mL of N,N-dimethylformamide solution, stirred vigorously for 5min; then, the solution was placed in an oil bath at 120°C for 30min, filtered by vacuum, and washed with deionized water and ethanol Washed three times respectively to obtain a white precipitate; dried in vacuum at 60°C for 24 hours to obtain MIL-68(In).

Embodiment 2

[0054] Synthesis of NiIn LDH catalyst

[0055] Get the MIL-68(In) that 120mgS1 obtains and disperse in 20mL 0.1M NaOH solution to obtain mixed solution A, 360mg Ni(NO 3 ) 2 ·6H 2 O was dissolved in 20mL deionized water to obtain mixed solution B. Mix mixed solution A and mixed solution B thoroughly, transfer to a 50mL polytetrafluoroethylene-lined stainless steel reactor, and keep the reaction at 180°C for 12h; after cooling to room temperature, vacuum Suction filtration and washing with deionized water and ethanol three times respectively to obtain a green precipitate; vacuum drying at 60°C for 24 hours to obtain NiInLDH.

Embodiment 3

[0057] Synthesis of S-Type Heterojunction NiIn LDH / In 2 S 3 catalyst

[0058] Take 60mg of the obtained NiIn LDH and disperse it in 40mL of ethanol, add 60mg of thiourea under vigorous stirring, continue to stir vigorously for 30min, then transfer to a 50mL polytetrafluoroethylene liner stainless steel reactor, keep the reaction at 100°C for 2h, cool to room temperature , vacuum-filtered, and washed with deionized water and ethanol three times respectively to obtain a gray precipitate; vacuum-dried at 60°C for 24 hours to obtain NiIn LDH / In 2 S 3 . The schematic diagram of its reaction principle is shown in figure 1 shown.

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Abstract

The invention belongs to the technical field of photocatalysts, and particularly relates to an S-type heterojunction catalyst as well as a preparation method and application thereof. The preparation method comprises the steps of S1, synthesizing MIL-68 (In); S2, synthesizing NiIn LDH; and S3, synthesizing NiIn LDH / In2S3. According to the catalyst, In2S3 is grown on a NiIn LDH nanosheet in an epitaxial manner to construct a NiIn LDH / In2S3 heterojunction with a p-n type columnar structure. The NiIn LDH / In2S3 heterojunction is formed through one-step vulcanization of NiIn LDH, the advantages of NiIn LDH and In2S3 are integrated, higher light utilization efficiency and electron-hole separation capacity are achieved, electron-hole recombination is greatly inhibited, and CO2 pollutants in air can be effectively converted and utilized.

Description

technical field [0001] The invention belongs to the technical field of photocatalysts, and in particular relates to an S-type heterojunction catalyst and its preparation method and application. Background technique [0002] Since the Industrial Revolution, the excessive dependence on fossil fuels such as coal, oil, and natural gas has led to CO 2 massive emissions of CO in the atmosphere 2 Concentrations are increasing year by year and are a major factor in global climate change. However, as the global population continues to grow, the use of fossil fuels will continue to increase. At the current stage, more than 85% of the world's energy needs are provided by the combustion of fossil fuels. Although new energy technologies are gradually advancing, their growth rate cannot meet the growing energy needs of the global population. In the next few decades, fossil energy will still be the energy model that humans mainly rely on. CO 2 There is little chance of a slowdown in emi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/043C01B32/40
CPCB01J27/043C01B32/40Y02A50/20
Inventor 王珺韩欣欣陈世霞刘成
Owner NANCHANG UNIV
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