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In-situ carbon-coated copper-nickel alloy nanoparticle photocatalyst and preparation method and application thereof

A nanoparticle, copper-nickel alloy technology, applied in the field of materials science, can solve the problems of poor performance of photocatalytic carbon dioxide reduction, few surface active sites, and easy recombination of photogenerated carriers, so as to promote development, improve catalytic process, wide Effect of light absorption range

Active Publication Date: 2022-02-25
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] One of the purposes of the present invention is to provide a non-semiconductor photocatalytic material to solve the technical problems of poor photocatalytic carbon dioxide reduction performance caused by the limited light absorption range, few surface active sites, and easy recombination of photogenerated carriers. In situ carbon-coated copper-nickel alloy nanoparticles photocatalyst

Method used

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  • In-situ carbon-coated copper-nickel alloy nanoparticle photocatalyst and preparation method and application thereof
  • In-situ carbon-coated copper-nickel alloy nanoparticle photocatalyst and preparation method and application thereof
  • In-situ carbon-coated copper-nickel alloy nanoparticle photocatalyst and preparation method and application thereof

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Embodiment 1

[0042] This embodiment provides an in-situ carbon-coated copper-nickel alloy nanoparticle photocatalyst, which mainly contains three main elements: Cu, C, and Ni. The preparation steps are as follows:

[0043] (1) Preparation of CuNiBTC

[0044] 0.42g of trimesic acid was dissolved in 40mL of absolute ethanol, and then 0.875g of Cu(NO 3 ) 2 2H 2 O and 0.975gNi(NO 3 ) 2 ·6H 2 O was dissolved in 15mL deionized water, and the former two were mixed evenly by stirring, and then the mixed solution was poured into a 100mL polytetrafluoroethylene reactor with a stainless steel shell, and put into an oven at 160 °C for 10 h. The precipitate is centrifuged at 8000r / min for 10min, and the obtained precipitate is washed with double distilled water and ethanol at a controlled speed of 8000r / min for 10min, and the above centrifugal washing is repeated for 7-8 times. The resulting filter cake is controlled at a temperature of Dry at 80°C, and the obtained product is CuNiBTC, which is t...

Embodiment 2

[0066] An in-situ carbon-coated copper-nickel alloy nanoparticle photocatalyst mainly contains three main elements of Cu, C and Ni, and is prepared by a method comprising the following steps:

[0067] (1) Preparation of CuNiBTC

[0068] 0.42g of trimesic acid was dissolved in 40mL of absolute ethanol, and then 0.875g of Cu(NO 3 ) 2 2H 2 O and 0.975gNi(NO 3 ) 2 ·6H 2 O was dissolved in 15mL deionized water, and the former two were mixed evenly by stirring, and then the mixed solution was poured into a 100mL polytetrafluoroethylene reactor with a stainless steel shell, and put into an oven at 160 °C for 10 h. Centrifuge the precipitate at 8000r / min for 10min, and then use double distilled water and ethanol to control the speed of 8000r / min to centrifuge and wash the precipitate for 10min, repeat the above centrifugal washing for 7-8 times, and control the temperature of the obtained filter cake Dry at 80°C, and the obtained product is CuNiBTC, which is taken out and stored...

Embodiment 3

[0074] An in-situ carbon-coated copper-nickel alloy nanoparticle photocatalyst mainly contains three main elements of Cu, C and Ni, and is prepared by a method comprising the following steps:

[0075] (1) Preparation of CuNiBTC

[0076] 0.42g of trimesic acid was dissolved in 40mL of absolute ethanol, and then 0.875g of Cu(NO 3 ) 2 2H 2 O and 0.975gNi(NO 3 ) 2 ·6H 2 O was dissolved in 15mL of deionized water, and the former two were mixed evenly by stirring, and then the mixed solution was poured into a 100ml polytetrafluoroethylene reactor with a stainless steel shell, and placed in a 160°C oven for 10h. Centrifuge the precipitate at 8000r / min for 10min, and then use double distilled water and ethanol to control the speed of 8000r / min to centrifuge and wash the precipitate for 10min, repeat the above centrifugal washing for 7-8 times, and control the temperature of the obtained filter cake Dry at 80°C, and the obtained product is CuNiBTC, which is taken out and stored i...

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Abstract

The invention discloses an in-situ carbon-coated copper-nickel alloy material photocatalyst and its preparation method and application. First, a copper-nickel bimetallic organic framework (CuNiBTC) is prepared by a hydrothermal method, and the CuNiBTC material is obtained by centrifugation, washing and drying; then After the sample is vacuum-sealed with a quartz tube, the in-situ carbon-coated copper-nickel alloy nanoparticle photocatalyst is obtained after high-temperature calcination, which has a wide light absorption range, high carbon dioxide reduction performance, low resistivity, and fast carrier transfer ability, high photogenerated carrier separation ability, low carrier recombination rate, and good carbon dioxide conversion cycle stability. It is used for near-infrared photocatalytic reduction of carbon dioxide, and the carbon monoxide precipitation rate can reach up to 11.205 μmol g ‑1 h ‑1 . The preparation method has the advantages of simple operation, low cost, non-toxic raw materials, certain economic value of the product, and production conforming to the concept of environmental protection.

Description

technical field [0001] The invention relates to a photocatalytic material, in particular to an in-situ carbon-coated copper-nickel alloy nanoparticle photocatalyst and a preparation method and application thereof, belonging to the field of materials science. Background technique [0002] Due to industrial development and the use of fossil fuels, carbon dioxide, a greenhouse gas, is increasing in concentration in the atmosphere, leading to a series of environmental problems such as the greenhouse effect, rising sea levels and melting glaciers. However, carbon dioxide is also a non-toxic and environmentally friendly resource. Converting carbon dioxide into fuels such as carbon monoxide and methane is of great significance in terms of the environment and energy regeneration. Therefore, there is an urgent need to develop “closed-loop” carbon sequestration schemes that can convert CO2 into CO and various useful low-carbon fuels. Currently, compared with high-energy-demanding CO2...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/755B01J35/08B01J37/08C01B32/40
CPCB01J23/755B01J37/086C01B32/40B01J35/393B01J35/398B01J35/39B01J35/23B01J35/51
Inventor 闵宇霖江华时鹏辉范金辰徐群杰
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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