Preparation method of auto-doped carbon catalysis material based on activated sludge domestication

An activated sludge and self-doping technology, applied in biochemical fuel cells, electrical components, battery electrodes, etc., can solve the problems of difficult disposal and utilization of activated sludge, secondary pollution, etc., and achieve aerobic reduction catalytic performance, cycle The effects of stability, poisoning resistance, and strong electrical conductivity

Active Publication Date: 2016-08-17
SOUTH CHINA UNIV OF TECH
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  • Abstract
  • Description
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Problems solved by technology

[0003] On the other hand, the activated sludge method is the most commonly used method in the treatment of domestic and production wastewater. Activated sludge is its by-product, which is enriched with a large amount of organic toxins, heavy metals and pathogens. If it is not treated properly, it will cause secondary pollution. Therefore, the disposal and utilization of activated sludge has become a major problem in the work of sewage plants

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  • Preparation method of auto-doped carbon catalysis material based on activated sludge domestication
  • Preparation method of auto-doped carbon catalysis material based on activated sludge domestication
  • Preparation method of auto-doped carbon catalysis material based on activated sludge domestication

Examples

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Embodiment 1

[0046] Get 10 grams of nitrification domesticated autotrophic activated sludge (the mass percentage of carbon element in this sludge is 23.04%, the mass percentage of nitrogen element is 6.39%, oxygen element The mass percentage is 28.56%) and dried at 60°C for 6 hours, taken out, ground, passed through a 100-mesh sieve, and then calcined at 800°C for 2 hours under a nitrogen atmosphere at a heating rate of 10°C per minute. The powder is treated with hydrochloric acid, washed with distilled water until neutral, dried at 60°C and passed through a 300-mesh sieve to obtain a self-doped porous sludge carbon material powder, that is, a self-doped carbon catalytic material.

[0047] The nitrification acclimation is specifically:

[0048] The activated sludge is in the nitrification acclimation solution, and the air flow rate is 1-3L / min for aerobic acclimatization and cultivation, and the MLSS is controlled at 3-6g / L to obtain autotrophic activated sludge floes with nitrifying bacte...

Embodiment 2

[0067] Get 10 grams of phenol domestication heterotrophic activated sludge (the mass percentage of carbon element in this sludge is 24.06%, the mass percentage of nitrogen element is 4.72%, oxygen element The mass percentage is 29.16%) and dried at 60°C for 6 hours, taken out, ground, passed through a 100-mesh sieve, and then calcined at 800°C for 2 hours under a nitrogen atmosphere at a heating rate of 5°C per minute, and treated with hydrochloric acid Afterwards, it was washed with distilled water until neutral, dried at 60° C. and passed through a 300-mesh sieve to obtain a self-doping porous sludge carbon material powder, that is, a self-doping carbon catalytic material.

[0068] The phenol domestication of the present embodiment is specifically:

[0069] The activated sludge is in the phenol acclimation solution, and the air flow rate is 1-3L / min for aerobic acclimatization culture; the MLSS is controlled at 3-6g / L; the heterotrophic activated sludge floes with phenol-deg...

Embodiment 3

[0076] Get 10 grams of the nitrification acclimation self-supporting type activated sludge (the mass percent of nitrogen element in this sludge is 6.39%, the mass percent of oxygen element is 28.56%) by the nitrification and acclimation autotrophic activated sludge of aerobic pool sludge domestication and cultivation of Shaogang coking waste water project in 60 Dry at ℃ for 6 hours, take it out, grind it, pass through a 100-mesh sieve, and then calcinate at 900℃ for 2 hours under nitrogen atmosphere at a heating rate of 10 degrees Celsius per minute, wash with distilled water until neutral after being treated with hydrochloric acid, and then After drying at 60°C, pass through a 300-mesh sieve to obtain a self-doping porous sludge carbon material powder, that is, a self-doping carbon catalytic material.

[0077] Subsequent experimental conditions are the same as in Example 1, and the CV scanning results are as follows: Figure 9 It is shown that it has excellent oxygen reductio...

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Abstract

The invention discloses a preparation method of an auto-doped carbon catalysis material based on activated sludge domestication. The preparation method includes the following steps that 1, nitrifying domestication or phenol domestication is conducted on activated sludge to obtain domesticated activated sludge; 2, the obtained sludge in the step 1 is dried, grinded and screened, is calcinated at the temperature of 700-1000 DEG C under an inert gas atmosphere for 1.5-4 hours, the sludge is subjected to acid treatment, then is washed with distilled water to be neutral and is dried and screened at the temperature of 55-105 DEG C to obtain auto-doped carbon catalysis material powder. The preparation method is simple, the costs are low, raw material sources are wide, the nitrogen element content in the catalysis material is increased, and the catalysis material has the good catalytic performance of oxygen reduction.

Description

technical field [0001] The invention relates to the technical field of electrode catalytic materials, in particular to a method for preparing a self-doped carbon catalytic material based on activated sludge acclimation. Background technique [0002] Fuel cells, including microbial fuel cells, are clean and environmentally friendly emerging power generation technologies. A large category of battery cathodes directly participate in the reaction with oxygen. The performance of cathode oxygen reduction is an important reason that affects the efficiency of battery power generation. Therefore, the performance of cathode oxygen reduction catalysts is The key factors that limit the practical application of fuel cells. At present, platinum-carbon catalyst is the most efficient oxygen reduction catalytic material, but due to its high cost and low yield, researchers are eager to find a low-cost and efficient platinum-carbon catalyst substitute. Among them, the researchers found that t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/88H01M4/90H01M8/16
CPCH01M4/88H01M4/90H01M8/16Y02E60/50
Inventor 冯春华雷振超刘厚峰郑嘉毅伍兆基马萧萧
Owner SOUTH CHINA UNIV OF TECH
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