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Fe-coated SiO2 catalyst as well as preparation method and application thereof

A catalyst, sodium hydroxide technology, applied in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc., can solve unstable electrode catalytic performance, low output voltage, device The problem of high cost is to achieve the effect of high cathode electron transfer rate, low operating cost and high electrocatalytic performance.

Active Publication Date: 2021-01-15
GUANGZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the operation of microbial fuel cells, the output voltage of the air cathode single chamber is low, the output power is low, the unstable electrode catalytic performance, and the cost of the device are too high. reactivity

Method used

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  • Fe-coated SiO2 catalyst as well as preparation method and application thereof
  • Fe-coated SiO2 catalyst as well as preparation method and application thereof
  • Fe-coated SiO2 catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] An embodiment of the Fe@SiO2 catalyst of the present invention, the microbial fuel cell reactor described in this embodiment is as figure 1 As shown, the preparation process of the Fe@SiO2 catalyst described in this embodiment includes the following steps:

[0034] (1) Stir 2-aminoterephthalic acid, ferric chloride hexahydrate and N,N-dimethylformamide at 20-30°C to obtain the first mixed solution; The mass ratio of formic acid, ferric chloride hexahydrate and N, N-dimethylformamide is: 2-aminoterephthalic acid: ferric chloride hexahydrate: N, N-dimethylformamide = 1:1: 272;

[0035] (2) keeping the first mixed solution in step (1) at 140° C. for 12 hours to obtain a dark brown mixture;

[0036] (3) Adding N,N-dimethylformamide to the dark brown mixture in step (2), stirring and washing, centrifugal filtration, and vacuum drying at 70° C. for 12 hours to obtain the first solid object;

[0037] (4) uniformly mixing the first solid object obtained in step (3) with sodi...

Embodiment 2

[0041] An embodiment of the Fe@SiO2 catalyst of the present invention, the microbial fuel cell reactor described in this embodiment is as figure 1 As shown, the preparation process of the Fe@SiO2 catalyst described in this embodiment includes the following steps:

[0042] (1) Stir 2-aminoterephthalic acid, ferric chloride hexahydrate and N,N-dimethylformamide at 20-30°C to obtain the first mixed solution; The mass ratio of formic acid, ferric chloride hexahydrate and N, N-dimethylformamide is: 2-aminoterephthalic acid: ferric chloride hexahydrate: N, N-dimethylformamide = 1: 1.49: 272.13;

[0043] (2) keeping the first mixed solution in step (1) at 150° C. for 18 hours to obtain a dark brown mixture;

[0044] (3) Adding N,N-dimethylformamide to the dark brown mixture in step (2), stirring and washing, after centrifugal filtration, vacuum drying at 80° C. for 18 hours to obtain the first solid object;

[0045](4) uniformly mixing the first solid object obtained in step (3) w...

Embodiment 3

[0049] An embodiment of the Fe@SiO2 catalyst of the present invention, the microbial fuel cell reactor described in this embodiment is as figure 1 As shown, the preparation process of the Fe@SiO2 catalyst described in this embodiment includes the following steps:

[0050] (1) Stir 2-aminoterephthalic acid, ferric chloride hexahydrate and N,N-dimethylformamide at 20-30°C to obtain the first mixed solution; The mass ratio of formic acid, ferric chloride hexahydrate and N, N-dimethylformamide is: 2-aminoterephthalic acid: ferric chloride hexahydrate: N, N-dimethylformamide = 1:2: 273;

[0051] (2) keeping the first mixed solution in step (1) at 160° C. for 24 hours to obtain a dark brown mixture;

[0052] (3) adding N,N-dimethylformamide to the dark brown mixture in step (2), stirring and washing, centrifuging, and drying at 90° C. for 24 hours to obtain the first solid object;

[0053] (4) uniformly mixing the first solid object obtained in step (3) with sodium hydroxide solu...

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Abstract

The invention discloses a preparation method of a Fe-coated SiO2 catalyst, which comprises the following steps: uniformly mixing 2-aminoterephthalic acid, ferric chloride hexahydrate and N, N-dimethylformamide according to a certain mass ratio to obtain a first mixed solution; keeping the temperature of the first mixed solution at 140-160 DEG C to obtain a dark brown mixture; adding N, N-dimethylformamide into the dark brown mixture, stirring and washing, centrifugally filtering, and drying in vacuum to obtain a first solid object; uniformly mixing the first solid object, a sodium hydroxide solution, cetyltrimethylammonium bromide, tetraethoxysilane, methanol and water according to a mass ratio of (10-40): (6-10): (2-8): (0.4-1.6): (2-8): (150-250) to obtain a second mixed solution; addingethanol into the second mixed solution, stirring and washing, centrifugally filtering, and drying in vacuum to obtain a second solid object; and firing the second solid object at a high temperature of 700-900 DEG C for 1-5h, introducing inert gas, and standing in a sodium hydroxide solution for 12-24h to obtain the Fe-coated SiO2 catalyst.

Description

technical field [0001] The invention relates to a technical field of catalysts, especially a Fe@SiO 2 Catalyst and its preparation method and application. Background technique [0002] Since modern times, due to the massive consumption of fossil fuels, the problem of environmental pollution has become increasingly serious. With increasing awareness of current energy issues and environmental protection, high-performance energy conversion and storage devices have been rapidly developed. As an ideal device to solve energy crisis and environmental problems, microbial fuel cells (MFCs) can obtain electrical energy through microbial degradation of substrates, which is inexhaustible, environmentally friendly, and will not cause pollution. Therefore, it has attracted extensive attention in basic research and practical applications. [0003] During the operation of the microbial fuel cell, the microorganisms on the anode consume the organic matter in the electrolyte to generate el...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/745B01J35/10H01M4/90H01G11/30H01G11/24
CPCB01J23/745H01M4/9041H01M4/9075H01G11/24H01G11/30B01J35/33B01J35/61Y02E60/50
Inventor 张鸿郭万奎麟戴熠王燕施辉辉唐进峰阎佳肖唐付
Owner GUANGZHOU UNIVERSITY
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