Method for preparing microbial fuel cell anode electrodes from agricultural wastes
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A technology of agricultural waste and fuel cells, which is applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems that the specific surface area is difficult to further increase and the steps are complicated, and achieve strong functionality, high raw material utilization, and high specific surface area. Effect
Inactive Publication Date: 2016-07-13
CHANGZHOU UNIV
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(Patent name: A method for constructing nanoporous membrane electrodes for direct methanol fuel cells based on the sacrificial template method, patent application number: 2...
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Embodiment 1
[0040] Dry the sample, and react for 30 minutes in a nitrogen atmosphere with a heating rate of 10°C / min and 400°C, and control the nitrogen flow rate at 600Ml / min to carbonize the sample, then take it out and grind it to 60 mesh, and soak it in 5wt% HCl for 6h , wash to neutral. Soak in 3wt% HF for 6h, wash until neutral, and dry; mix and grind the sample with KOH to 100 mesh, move it to a nickel crucible, and set the activation conditions as follows: temperature setting 700°C, temperature 1h, ratio 1:4, the obtained activated porous carbon material is marked as D-700-4-1.
Embodiment 2
[0042] Dry the sample, and react for 30 minutes in a nitrogen atmosphere with a heating rate of 10°C / min and 400°C, and control the nitrogen flow rate at 600Ml / min to carbonize the sample, then take it out and grind it to 60 mesh, and soak it in 5wt% HCl for 6h , wash to neutral. Soak in 3wt% HF for 6h, wash until neutral, and dry; mix and grind the sample with KOH to 100 mesh, move to a nickel crucible, and set the activation conditions as follows: temperature setting 800°C, temperature 1h, ratio 1:2, the activated porous carbon material was obtained, marked as D-800-2-1.
Embodiment 3
[0044] Dry the sample, and react for 30 minutes in a nitrogen atmosphere with a heating rate of 10°C / min and 400°C, and control the nitrogen flow rate at 600Ml / min to carbonize the sample, then take it out and grind it to 60 mesh, and soak it in 5wt% HCl for 6h , wash to neutral. Soak in 3wt% HF for 6h, wash until neutral, and dry. Mix and grind the sample with KOH to 100 mesh, move it to a nickel crucible, and set the activation conditions as follows: temperature setting 800°C, temperature 1h, ratio 1:3, and the activated porous carbon material is obtained, marked as D -800-3-1.
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Abstract
The invention relates to the technical field of microbial fuel cells, in particular to a method for preparing microbial fuel cell anode electrodes from agricultural wastes.The method includes drying a sample, increasing the temperature to 400 DEG C at a temperature increase rate of 10 DEG C/min in an atmosphere of nitrogen, reacting at 400 DEG C for 30 minutes, carbonizing the sample by controlling nitrogen flow speed at 600 Ml/min, taking the carbonized sample out, grinding the carbonized sample to be in 60-mesh size, soaking the ground carbonized sample for 6 hours by 5wt% HCl, and washing the soaked ground carbonized sample to be neutral; soaking the neutral sample for 6 hours by 3wt% HF, washing the soaked sample to be neutral and drying; mixing the dried sample with KOH, grinding a mixture to be in a 100-mesh size, and transferring the ground mixture to a nickel crucible to activate at 700-900 DEG C in an atmosphere of nitrogen for 1-2 hours, wherein the ratio of the sample to the KOH is 1:2-1:6.The method for preparing the microbial fuel cell anode electrodes from the agricultural wastes has the advantages that the high-quality biomass porous carbon electrodes, prepared from agricultural wastes-bean dregs, are high in specific surface area and capacitance and have good microbial biomass enrichment effect; the method, which is capable of achieving waste resource utilization, is high in raw material use efficiency, powerful in functionality, capable of achieving environment friendliness of the electrodes and the like.
Description
technical field [0001] The invention relates to the technical field of microbial fuel cells, in particular to a method for preparing anode electrodes of microbial fuel cells from agricultural waste. Background technique [0002] In recent years, with the depletion of fossil energy and the harm caused to the environment by the combustion of coal, oil and other fossil fuels, it has become an urgent task to find a resource-saving and environment-friendly new energy. [0003] According to reports, in 2014, China's soybean production was about 12.35 million tons, the import volume was 71.404 million tons, the export volume was 2.07 million tons, and the domestic soybean apparent consumption was 83.547 million tons. China is one of the main countries that process soybeans in the world. As the largest by-product in the soybean processing industry (accounting for about 15% to 20% of the dry weight of whole beans), okara produces about 16 million tons of wet okara per year. In the cu...
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