Porous nitrogen-doped carbon nanofiber dispersed nickel and molybdenum phosphide photocatalyst as well as preparation and application thereof

A nitrogen-doped carbon and nanofiber technology, applied in the field of photocatalytic materials, can solve the problems of poor selectivity of reduction products, easy recombination of photogenerated carriers, and few surface active sites, and achieve rapid transfer of artesian carriers and high specific surface area , High reduction of CO2 performance effect

Active Publication Date: 2021-09-17
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a photocatalyst of porous nitrogen-doped carbon nanofiber dispersed nickel and molybdenum phosphide and its preparation and application, so as to solve the problem that the above-mentioned MoP is a photocatalytic material that effectively absorbs light and has few surface active sites. , photogenerated carriers are easily recombined and / or the selectivity of reduction products is poor, etc. 2 Technical issues with poor performance

Method used

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  • Porous nitrogen-doped carbon nanofiber dispersed nickel and molybdenum phosphide photocatalyst as well as preparation and application thereof
  • Porous nitrogen-doped carbon nanofiber dispersed nickel and molybdenum phosphide photocatalyst as well as preparation and application thereof
  • Porous nitrogen-doped carbon nanofiber dispersed nickel and molybdenum phosphide photocatalyst as well as preparation and application thereof

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Effect test

Embodiment 1

[0069] Dispersed nickel and molybdenum phosphide nanoparticles photocatalyst in a porous nitrogen-doped carbon nanofiber mainly contains six main elements of Mo, Ni, P, O, C and N, and is prepared by a method comprising the following steps:

[0070] (1) Preparation of Mo-Ni spinning solution

[0071] Take 2mmol MoCl respectively 5 , 0.06mmol Ni(NO 3 ) 2 ·6H 2 O and 400mg PS were dissolved in 5mL DMF, and after the above reagents were dissolved, 0.5g PAN was added, and heated and stirred in an oil bath at 60°C to dissolve.

[0072] (2) Preparation of Mo-Ni carbon fiber membrane

[0073] Transfer the above Mo-Ni spinning liquid into a syringe, and use the electrospinning equipment to carry out electrospinning. During the electrospinning process, the temperature in the control room is 25°C, the ambient humidity is not more than 50%, and the negative high voltage is -3kV. The positive high voltage was 13kV, and the liquid feeding rate of the spinning solution was 0.004mL / min;...

Embodiment 2

[0096] Dispersed nickel and molybdenum phosphide nanoparticles photocatalyst in a porous nitrogen-doped carbon nanofiber mainly contains six main elements of Mo, Ni, P, O, C and N, and is prepared by a method comprising the following steps:

[0097] (1) Preparation of Mo-Ni spinning solution

[0098] Take 2mmol MoCl respectively 5 , 0.12mmol Ni(NO 3 ) 2 ·6H 2 O and 400mg PS were dissolved in 5mL DMF, after the above drug was dissolved, 0.5g PAN was added, and placed in a 60°C oil bath, heated and stirred to dissolve.

[0099] (2) Preparation of Mo-Ni carbon fiber membrane

[0100] Transfer the above Mo-Ni spinning liquid into a syringe, and use the electrospinning equipment to carry out electrospinning. During the electrospinning process, the temperature in the control room is 25°C, the ambient humidity is not more than 50%, and the negative high voltage is -3kV. The positive high voltage was 13kV, and the liquid feeding rate of the spinning solution was 0.004mL / min; fina...

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Abstract

The invention relates to a porous nitrogen-doped carbon nanofiber dispersed nickel and molybdenum phosphide photocatalyst as well as preparation and application thereof. The preparation method comprises the following steps: (1) heating and dissolving MoCl5, Ni(NO3)2.6H2O, PS and PAN in DMF to obtain a spinning solution; (2) performing electrostatic spinning on the spinning solution to obtain a carbon fiber membrane; and (3) placing the carbon fiber membrane in a tubular furnace, firstly adopting sodium hypophosphite for pre-phosphorization, and then calcining and carbonizing the component to obtain a target product. The prepared catalyst has a wide light absorption range, the capability of reducing carbon dioxide (CO2) under visible light is greatly improved, and the catalyst shows excellent selectivity of reducing CO2 into carbon monoxide (CO). Meanwhile, the photocatalyst has the advantages of low resistivity, rapid carrier transfer capability, high photon-generated carrier separation capability, low carrier recombination rate, good CO2 reduction cycle stability and the like.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic materials, and relates to a photocatalyst in which porous nitrogen-doped carbon nanofibers disperse nickel and molybdenum phosphide, and its preparation and application. Background technique [0002] With growing concern over the overuse of fossil fuels and severe climate change, carbon dioxide (CO 2 ) Excessive emissions prompt people to reduce CO 2 emissions, develop new energy to alleviate the consumption of non-renewable energy. Therefore, it is of great practical significance and urgency to convert carbon dioxide into beneficial chemicals or fuels to reduce carbon dioxide emissions. In particular, CO2 reductions driven directly by solar energy will serve as a renewable feedstock for the synthesis of value-added chemicals and carbon-based fuels such as carbon monoxide (CO), methane (CH 4 ) and ethylene (C 2 h 2 ), is a promising strategy to address current environmental challenges ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24C01B32/40
CPCB01J27/24B01J35/004C01B32/40
Inventor 陈作锋巩帅奇牛艳丽滕雪刘璇徐铭泽徐晨
Owner TONGJI UNIV
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