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Carbon-doped nano-catalyst as well as preparation method and application thereof

A catalyst and carbon nanotechnology, applied in chemical instruments and methods, physical/chemical process catalysts, chemical/physical processes, etc., can solve the problems of complex preparation methods and difficult to control, and achieve strong catalytic performance, simple methods, and large yields. Effect

Active Publication Date: 2016-03-23
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, choosing natural biomass as the precursor to prepare cathode catalysts has become a research hotspot, but most of the preparation methods are complex and difficult to control, and further research is needed to reduce their cost and complexity and improve their catalytic activity.

Method used

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  • Carbon-doped nano-catalyst as well as preparation method and application thereof
  • Carbon-doped nano-catalyst as well as preparation method and application thereof
  • Carbon-doped nano-catalyst as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Preparation of Biomass Doped Carbon Nanocatalysts

[0038] The preparation process of EGC1-10-2 is as follows: the whole urea and eggs are steamed and ground, then placed in an 80°C drying oven to dry for 24 hours, and the urea is put into a crucible with a cover and calcined at 550°C for 3 hours to prepare g-C 3 N 4 , and the dried eggs are ground evenly, take the dried eggs and g-C 3 N 4 1:1, after uniform grinding, calcined at 900°C for 2h at a heating rate of 10°C / min in a tube furnace.

[0039] (EGCx-y-z, where X is dry egg and g-C 3 N 4 The mass ratio, Y is the heating rate of the tube furnace, Z is the heating time, EC is the preparation of pure eggs)

[0040] Wherein EGC0.5-5-2, EGC1-5-2, EGC1-10-1, EGC1-10-3, EGC2-5-2, EGC1-10-2, EGC1-15-2 were prepared according to the above method.

[0041] Through the doped carbon nanocatalysts under different conditions in this example, seven different doped carbon nanocatalysts were obtained.

Embodiment 2

[0043] XPS Characterization of Biomass Doped Carbon Nanocatalysts

[0044] The XPS tests of EGC1-5-2, EGC1-10-2, and EGC1-15-2 three kinds of doped carbon nanocatalysts were realized on a multifunctional X-ray photoelectron spectrometer (model AxisUltraDLD), and the analysis room worked When the vacuum degree is about 5×10 -9 torr, the X light source used is a monochromatic AlKα source (MonoAlKα), the energy is 1486.6eV, 10mA×15KV, and the beam spot size is 700×300μm; the pass energy of full spectrum scanning is 160eV, and the pass energy of narrow spectrum scanning is 40eV, the number of scans is 1 time. Before the result analysis, the C1s and N1s of each sample were first divided into peaks, and then the binding energy of C1s at the lowest energy end was calibrated to 284.6eV, and the N1s element was corrected according to the shift of the C1s peak position.

[0045] Through the XPS analysis of the three materials EGC1-5-2, EGC1-10-2, and EGC1-15-2 in this example, nitroge...

Embodiment 3

[0051] XRD Characterization of Biomass Doped Carbon Nanocatalysts

[0052] XRD analysis: used to analyze the crystal structure of EGCx-y-z catalyst, the test process is realized on the D8ADVANCE instrument, the test conditions are copper target, incident ray λ=0.15418nm, Ni filter, tube pressure 40KV, tube flow 40mA; The scanning step length is 0.02 degrees, and the scanning speed is 0.1 seconds / step; the slit DS0.5°RS8mm (corresponding to the LynxExe array detector).

[0053] Through the XRD analysis of the three catalysts and EC in this example, the existence of a strong diffraction peak around 2θ=26° is a characteristic peak of the graphite structure. Among them, the C(002) peak of EGC1-10-2 shifts to the left by up to 23.6°, indicating that the interlayer spacing of this material is larger than that of other materials, and it is much larger than that of graphite microcrystals. It shows that the structure of this material is the most open, and the most condition has more a...

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Abstract

The invention discloses a carbon-doped nano-catalyst as well as a preparation method and an application thereof. The preparation method comprises steps as follows: a whole boiled egg is ground, dehydrated and mixed with g-C3N4, the mass ratio of the dehydrated egg to g-C3N4 is 0.5-2, the mixture is ground uniformly and put in a tube furnace, nitrogen is introduced for protection, the mixture is calcined at the temperature of 800-1,000 DEG C for 1-3 h at the heating speed of 5-15 DEG C / min, and the carbon-doped nano-catalyst is obtained. Raw materials required for the carbon-doped nano-catalyst are cheap, the method is simple, the yield is high, the carbon-doped nano-catalyst with the best catalysis effect is obtained by changing the proportion of raw materials and the heating speed, and the carbon-doped nano-catalyst can replace expensive Pt / C (20%) to a certain extent in the aspect of oxygen reduction effect under the neutrality condition.

Description

technical field [0001] The invention belongs to the field of biological energy materials, and in particular relates to a preparation method and application of a doped carbon nano catalyst. Background technique [0002] Microbial fuel cells (MFCs) are an advanced energy technology that uses electrogenic microorganisms as catalysts to convert the chemical energy of organic matter into electrical energy. At present, there are two major crises of environmental pollution and resource shortage in the human world. MFCs can generate electricity while processing organic waste (including organic wastewater and organic solid waste), achieving a win-win situation in waste treatment and energy recovery. It has become a research hotspot in the field of environmental protection. [0003] At present, microbial fuel cells are mostly in the laboratory stage, so the scale-up of microbial fuel cell systems is the main problem at present. The key to the scale-up of microbial fuel cells is direc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/10H01M4/90
CPCH01M4/90Y02E60/50
Inventor 朱能武杨婷婷黄健键吴平霄
Owner SOUTH CHINA UNIV OF TECH
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