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Temperature responsive composite material, preparation method and application thereof

A composite material and responsive technology, applied in chemical instruments and methods, water treatment of special compounds, water/sludge/sewage treatment, etc., can solve the problems of low light utilization rate, application limitation, difficult recycling, etc., and achieve excellent electrical conductivity performance, good stability and activity controllability, and the effect of improving the photocatalytic effect

Inactive Publication Date: 2016-11-09
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since g-C 3 N 4 The low utilization rate of light and the easy recombination of electrons and holes make it difficult to recycle, which limits its application

Method used

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  • Temperature responsive composite material, preparation method and application thereof
  • Temperature responsive composite material, preparation method and application thereof
  • Temperature responsive composite material, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Step 1. Preparation of g-C 3 N 4 Photocatalyst: Take 3 g of melamine and place it in a crucible, place it in a muffle furnace, and calcine it in an air atmosphere, raise the temperature to 500 °C at a heating rate of 2.3 °C / min, and keep it at a constant temperature for 2 hours, then at 550 °C Keep it at a constant temperature for 2 hours, cool down to room temperature naturally and grind it finely to get g-C 3 N 4 Photocatalyst, save for future use.

[0037] Step 2, the g-C prepared in step 1 3 N 4 Dispersed in ethylene glycol and sonicated to make g-C 3 N 4 suspension; the Fe(NO 3 ) 3 9H 2 O, polyvinylpyrrolidone (PVP), polyethylene glycol (PEG), and CH 3 COONa·3H 2 O dissolved in g-C respectively 3 N 4 in suspension; g-C 3 N 4 , ethylene glycol, Fe(NO 3 ) 3 9H 2 O, polyvinylpyrrolidone (PVP), polyethylene glycol (PEG), and CH 3 COONa·3H 2 The dosage of O is as follows: 1.5g, 30mL, 0.1g, 0.005g, 0.1g, 0.2g. Put it into a polytetrafluoroethylene re...

Embodiment 2

[0041] Step 1. Preparation of g-C 3 N 4 Photocatalyst: Take 4 g of melamine and place it in a crucible, place it in a muffle furnace, and calcine it in an air atmosphere, raise the temperature to 450 °C at a heating rate of 2.5 °C / min, and keep it at a constant temperature for 2 hours, then at 500 °C Keep it at a constant temperature for 2 hours, cool down to room temperature naturally and grind it finely to get g-C 3 N 4 Photocatalyst, save for future use.

[0042] Step 2, the g-C prepared in step 1 3 N 4 Dispersed in ethylene glycol and sonicated to make g-C 3 N 4 suspension; the Fe(NO 3 ) 3 9H 2 O, polyvinylpyrrolidone (PVP), polyethylene glycol (PEG), and CH 3 COONa·3H 2 O dissolved in g-C respectively 3 N 4 in suspension; g-C 3 N 4 , ethylene glycol, Fe(NO 3 ) 3 9H 2 O, polyvinylpyrrolidone (PVP), polyethylene glycol (PEG), and CH 3 COONa·3H 2 The dosage of O is as follows: 3.0g, 50mL, 1.0g, 0.05g, 0.3g, 0.7g. Put it into a polytetrafluoroethylene rea...

Embodiment 3

[0046] Step 1. Preparation of g-C 3 N 4 Photocatalyst: Take 5 g of melamine and place it in a crucible, place it in a muffle furnace, and calcine it in an air atmosphere, raise the temperature to 480°C at a heating rate of 3°C / min, keep it at a constant temperature for 2 hours, and then heat it at 520°C Keep it at a constant temperature for 2 hours, cool down to room temperature naturally and grind it finely to get g-C 3 N 4 Photocatalyst, save for future use.

[0047] Step 2, the g-C prepared in step 1 3 N 4 Dispersed in ethylene glycol and sonicated to make g-C 3 N 4 suspension; the Fe(NO 3 ) 3 9H 2 O, polyvinylpyrrolidone (PVP), polyethylene glycol (PEG), and CH 3 COONa·3H 2 O dissolved in g-C respectively 3 N 4 in suspension; g-C 3 N 4 , ethylene glycol, Fe(NO 3 ) 3 9H 2 O, polyvinylpyrrolidone (PVP), polyethylene glycol (PEG), and CH 3 COONa·3H 2 The amount of O used is: 1.9g, 40mL, 0.45g, 0.02g, 0.2g, 0.35g. Put it into a polytetrafluoroethylene reac...

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Abstract

The invention provides a temperature responsive composite material, a preparation method and application thereof. The method comprises the steps of: 1, preparation of a g-C3N4 photocatalyst; 2, preparation of a Fe3O4 / g-C3N4 composite material by hydrothermal technology; 3, preparation of a temperature responsive composite material PNIPAM / Fe3O4 / g-C3N4. In the invention, g-C3N4 is a novel organic visible light catalyst, also Fe3O4 nanoparticles have excellent conductive properties, and the introduction of Fe3O4 and the synergistic effect with g-C3N4 improve the photocatalytic effect. In addition, because of the unique temperature response performance of PNIPAM, the prepared temperature responsive composite material PNIPAM / Fe3O4 / g-C3N4 has very good stability and activity controllability.

Description

technical field [0001] The invention relates to a composite photocatalyst, in particular to a preparation method and application of a temperature-responsive composite material. Background technique [0002] Antibiotics are widely used in our country, but in recent decades they have reached the point of abuse in some aspects. In 2011, the Chinese Ministry of Health stated that in China, the utilization rate of antibiotics by patients reached 70%, twice that of European and American countries. The annual antibiotic consumption in my country is 160,000 tons, but less than 20% of them really need to be used, so at least 50,000 tons are discharged to nature through the following forms. The abuse of antibiotics is mainly manifested in the following aspects: (1) Randomly using broad-spectrum antibiotics in clinical practice without paying attention to medical methods, and increasing the frequency and dosage of medication by oneself is a way of antibiotic abuse. (2) Abuse of antibi...

Claims

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Application Information

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IPC IPC(8): B01J27/24B01J33/00C02F1/30
CPCC02F1/30B01J27/24B01J33/00C02F2305/10C02F2101/30C02F2103/003B01J35/33B01J35/39
Inventor 唐旭倪良王赟韩娟刘仁杰
Owner JIANGSU UNIV
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