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Nitrogen-phosphorus-sulfur co-doped porous carbon loaded metal phosphide nano composite material as well as preparation method and application thereof

A nano-composite material and metal phosphide technology, applied in the field of water pollution treatment, can solve the problems of poor chemical stability, easy loss of metal ions, low catalytic activity, etc. The effect of improving catalytic activity

Active Publication Date: 2020-09-29
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, at present, metal phosphide materials still face problems such as low catalytic activity, poor chemical stability, easy agglomeration of particles, and easy loss of metal ions, which greatly hinder their practical application.

Method used

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  • Nitrogen-phosphorus-sulfur co-doped porous carbon loaded metal phosphide nano composite material as well as preparation method and application thereof
  • Nitrogen-phosphorus-sulfur co-doped porous carbon loaded metal phosphide nano composite material as well as preparation method and application thereof
  • Nitrogen-phosphorus-sulfur co-doped porous carbon loaded metal phosphide nano composite material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] Example 1, Preparation of cobalt phosphide nanocomposite material supported by nitrogen, phosphorus and sulfur co-doped porous carbon

[0073] Concrete preparation process is as follows:

[0074]0.0747g (0.3mmol) of cobalt acetate [Co(CH 3 COO) 2 4H 2 O], 3g of dicyandiamide, and 15g of ammonium chloride were heated and refluxed in 30mL of deionized water at 80°C for 4 hours to obtain a completely dissolved mixed solution, then heated to 100°C to evaporate the deionized water, and completely dried in an oven at 100°C Finally, a uniformly mixed powder of the three was obtained; the mixed powder was raised from room temperature to 550°C at a heating rate of 2°C / min in a tube furnace, pyrolyzed at 550°C for 2 hours, and N was introduced into the tube furnace 2 , the flow rate is controlled at 20-30mL / min, and Co-g-C can be obtained after natural cooling 3 N 4 Material;

[0075] 200mg Co-g-C 3 N 4 Sonicate the material in 50mL of methanol for 30min to obtain a well-...

Embodiment 2

[0079] Example 2, Preparation of nitrogen, phosphorus, and sulfur co-doped porous carbon-supported titanium phosphide nanocomposites

[0080] Concrete preparation process is as follows:

[0081] 24g (100mmol) of titanium sulfate [Ti(SO 4 ) 2 ], 800g urea, and 2kg ammonium carbonate were ground and mixed to obtain a uniformly mixed powder; the mixed powder was raised from room temperature to 580°C at a heating rate of 5°C / min in a tube furnace, and pyrolyzed at 580°C 4h, He was introduced into the tube furnace, the flow rate was controlled at about 50mL / min, and Ti-g-C was obtained after natural cooling. 3 N 4 Material;

[0082] 80g Ti-g-C 3 N 4 The material was sonicated in 4L of ethanol for 45min to obtain a well-dispersed suspension A; 1L of ethanol solution dissolved with 80g HCCP and 200g BPS was added dropwise to the suspension A; after mixing for 40min, continue to slowly add 400mL of dimethylformamide Amine, separation operation after continuous reaction for 30h....

Embodiment 3

[0086] Example 3, Preparation of manganese phosphide nanocomposite material supported by nitrogen, phosphorus and sulfur co-doped porous carbon

[0087] Concrete preparation process is as follows:

[0088] 12.25g (50mmol) manganese acetate [Mn(CH 3 COO) 2 4H 2 O], 100g melamine, and 100g ammonium sulfate were heated and refluxed at 60°C in 1L of deionized water for 12h to obtain a completely dissolved mixed solution, then heated to 90°C to evaporate the deionized water, dried completely in an oven at 100°C, and ground to obtain The three are uniformly mixed powder; the mixed powder is raised from room temperature to 650°C at a heating rate of 20°C / min in a tube furnace, and pyrolyzed at 650°C for 2h, N 2 is passed into the tube furnace, and the flow rate is Controlled at 30-40mL / min, the Mn-g-C 3 N 4 Material;

[0089] 5g Mn-g-C 3 N 4 The material was sonicated in 1L of acetonitrile for 60min to obtain a well-dispersed suspension A; 200mL of acetonitrile solution disso...

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Abstract

The invention discloses a nitrogen-phosphorus-sulfur co-doped porous carbon loaded metal phosphide nano composite material as well as a preparation method and application thereof. The preparation method of the material comprises the following steps: S1, uniformly mixing a metal salt, a carbon source compound and a swelling agent, and pyrolyzing in an inert gas atmosphere to obtain M-g-C3N4; S2, dispersing the M-g-C3N4 in a solvent to obtain a suspension A, then dropwise adding a mixed solution B in which phosphonitrilic chloride trimer and 4,4-dihydroxy diphenyl sulfone are dissolved into thesuspension A, and carrying out a mixing reaction; dropwise adding an alkaline auxiliary agent, uniformly mixing and reacting, and after the reaction is finished, separating to obtain M-g-C3N4@PZS; andS3, performing high-temperature pyrolysis on the M-g-C3N4@PZS in an inert gas atmosphere to obtain the nitrogen-phosphorus-sulfur co-doped porous carbon loaded metal phosphide nano composite materialMPx-NPS-C. The material is simple to prepare and high in general applicability; and the prepared material shows excellent performance in catalytically activating H2O2, PMS and PS to degrade complex organic compounds, and the application of the metal phosphide material in advanced oxidation water treatment is broadened.

Description

technical field [0001] The invention relates to the technical field of water pollution treatment, and more specifically relates to a metal phosphide nanocomposite material supported by nitrogen, phosphorus and sulfur co-doped porous carbon and its preparation method and application. Background technique [0002] With the continuous prosperity and development of the urban chemical industry, industrial wastewater pollution has gradually become a global environmental problem. The composition of industrial wastewater is complex, and the refractory organic matter has a complex molecular structure and strong chemical stability, which can cause persistent pollution. Traditional urban sewage biochemical treatment systems cannot achieve complete purification effects. Therefore, exploring more effective water treatment methods has profound significance for alleviating the current water pollution problems. Among many emerging water treatment processes, (like) Fenton technology shows b...

Claims

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Application Information

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IPC IPC(8): C01B25/08C01B32/15B01J27/24B82Y30/00B82Y40/00
CPCC01B25/08C01B32/15B01J27/24B82Y30/00B82Y40/00C01P2002/72C01P2004/03C01P2004/04B01J35/33B01J35/61
Inventor 李萍林于楠陈冉李文琴
Owner SUN YAT SEN UNIV
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