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Bismuth-based nano material as well as preparation method and application thereof

A nanomaterial, bismuth-based technology, applied in nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of limiting electrocatalytic reduction efficiency, low concentration, improvement, etc., and achieve good electrocatalytic CO2 reduction performance, preparation method Simple, well-stabilized effect

Active Publication Date: 2020-09-01
EAST CHINA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the problem that the bismuth-based materials in the prior art have a low concentration of subsurface solvent oxygen, which limits the bismuth-based materials in CO 2 To solve the problem of improving the efficiency of electrocatalytic reduction, a bismuth-based nanomaterial with a high concentration of subsurface solvent oxygen and its preparation method and application are provided

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  • Bismuth-based nano material as well as preparation method and application thereof
  • Bismuth-based nano material as well as preparation method and application thereof
  • Bismuth-based nano material as well as preparation method and application thereof

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Embodiment 1

[0042] Preparation of bismuth-based materials with high concentration subsurface solvent oxygen nanosheets

[0043]Step (1): the solution containing 2g bismuth nitrate pentahydrate is added dropwise in the sodium diethyldithiocarbamate solution, the molar ratio of bismuth nitrate and sodium diethyldithiocarbamate is 1:3, both The concentration of each was 0.1mol / L, and stirred at room temperature for 1 hour. Washing and drying to obtain Bi(S 2 CNEt 2 ) 3 powder;

[0044] Step (2): 0.65g Bi(S 2 CNEt 2 ) 3 Add 10 mL of deionized water, heat at 140°C for 10 hours, wash and dry to obtain nanorod-shaped bismuth sulfide (referred to as NR);

[0045] Step (3): 10 mg of the prepared NR powder and 40 μL of Nafion solution (5wt%) were dispersed in 1 mL of ethanol, and after ultrasonication for 30 minutes, they were uniformly drop-coated on hydrophobic carbon paper as a working electrode (the drop-coating area was 1 × 1 cm 2 ). Using the above electrode as the working electrode,...

Embodiment 2

[0048] Preparation of bismuth-based materials with high concentration subsurface solvent oxygen nanosheets

[0049] Step (1): the solution that will contain 2g bismuth chloride is added dropwise in the sodium diethyldithiocarbamate solution, the consumption molar ratio of bismuth chloride and sodium diethyldithiocarbamate is 1:1, both The concentration of the solution was 0.2M, and stirred at room temperature for 1 hour. Washing and drying to obtain Bi(S 2 CNEt 2 ) 3 powder;

[0050] Step (2): 0.4g Bi(S 2 CNEt 2 ) 3 Add 10 mL of deionized water, heat at 120°C for 24 hours, wash and dry to obtain nanorod-shaped bismuth sulfide (referred to as NR2);

[0051] Step (3): The prepared NR2 powder 10mg and 100μL Nafion solution (5wt%) were dispersed in 10mL ethanol, after ultrasonication for 20 minutes, evenly drop-coated on the hydrophobic carbon paper as the working electrode (the drop-coating area was 1×1cm 2 ). Using the above electrode as the working electrode, Ag / AgCl (...

Embodiment 3

[0053] Preparation of bismuth-based materials with high concentration subsurface solvent oxygen nanosheets

[0054] Step (1): the solution that will contain 2g bismuth nitrate is added dropwise in the sodium diethyldithiocarbamate solution, the consumption molar ratio of bismuth nitrate and sodium diethyldithiocarbamate is 1:5, the concentration of both to 0.05M and stirred at room temperature for 2 hours. Washing and drying to obtain Bi(S 2 CNEt 2 ) 3 powder;

[0055] Step (2): 1g Bi(S 2 CNEt 2 ) 3 Add 10 mL of deionized water, heat at 160°C for 6 hours, wash and dry to obtain nanorod-shaped bismuth sulfide (referred to as NR3);

[0056] Step (3): The prepared NR3 powder 20mg and 10μL Nafion solution (5wt%) were dispersed in 0.5mL ethanol, after ultrasonication for 60 minutes, evenly drop-coated on the hydrophobic carbon paper as the working electrode (the drop-coating area was 1× 1cm 2 ). Using the above electrode as the working electrode, Ag / AgCl (3M KCl) as the r...

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Abstract

The invention discloses a bismuth-based nano material as well as a preparation method and application thereof. The preparation method disclosed by the invention comprises the step of preparing a nano-sheet-shaped bismuth-based material from nano-rod-shaped bismuth sulfide by an electrochemical reduction method, wherein the nano-rod-shaped bismuth sulfide is prepared from Bi (S2CNEt2) 3 through a hydrothermal method. The bismuth-based nano material solves the problem of low concentration of subsurface solvent oxygen active components, and realizes high CO2 electrocatalytic reduction efficiency.

Description

technical field [0001] The invention relates to a bismuth-based nano material and a preparation method and application thereof. Background technique [0002] With the progress of the times and the development of science and technology, energy has become an important factor affecting human society. At present, traditional energy sources such as coal, oil, and natural gas still play a pivotal role in the world's economic development, but the reserves of these resources on the earth are very limited, and the energy crisis has become an urgent problem for human beings to solve. Atmospheric CO 2 It is the main greenhouse gas that causes global warming. People are increasingly concerned about the adverse effects of modern industrialization on human society. The rising CO 2 Emissions pose a great threat to the global ecological environment. Electrochemical catalytic reduction is the recovery of CO 2 A very promising route with huge economic and environmental benefits. However,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/18B01J37/10B01J27/04B01J37/34B82Y30/00B82Y40/00C25B3/04C25B11/06C01B32/50C25B3/25
CPCB01J23/18B01J37/10B01J27/04B01J37/348B82Y30/00B82Y40/00C01B32/50B01J35/33
Inventor 李宇航李春忠王雅婷程玲刘锦泽肖楚倩陈容振
Owner EAST CHINA UNIV OF SCI & TECH
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