Method for preparing microbial fuel cell electrode material employing rape stalks
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A fuel cell electrode, rape straw technology, applied in biochemical fuel cells, battery electrodes, circuits, etc., achieves the effects of fast electron migration rate, good biocompatibility, and improved effect
Active Publication Date: 2016-08-10
CHANGZHOU UNIV
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[0009] At present, porous carbon electrodes are mainly used in supercapacitors, and the research on it is mainly to promote its rapid industrial application and increase practical value
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[0043] Example 1
[0044] Cut the rape straw into pieces and dry it with H 2 SO 4 The solution was mixed in a hydrothermal kettle, the concentrations were selected as 10%, 30%, and 50%, reacted at 150 ° C for 3 hours, cooled and filtered to neutrality, and mixed with distilled water of 1:1.5 with the product, and continued to put in water. In the hot kettle, the reaction was performed at 150 °C for 3 h, suction filtration, and drying to obtain hydrothermal carbon. The sample was carbonized in a tube furnace under nitrogen atmosphere. The carbonization temperature was 400 °C, the heating rate was 10 °C / min, and the nitrogen flow rate was controlled at 0.6 L / min. % HF soaked for 6h, washed to neutrality and dried; the sample was mixed with KOH and activated under nitrogen atmosphere in a tube furnace. / min, the reaction time is 1h, 1.5h, 2h, the activation ratio is 1:2, 1:3, 1:4, 1:5, 1:6, soaked in 5wt% HCl for 6h after activation, and washed until neutral And mark after dr...
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[0053] Example 2
[0054] The electrode obtained in Example 1 was mounted in the microbial fuel cell system, such as figure 1 As shown, the microbial fuel cell includes a plant 1 , a natural water body 2 and a sludge 3 , and two electrodes, an anode 5 and a cathode 4 , are mounted in the natural water body 2 and the sludge 3 . Use a multimeter to measure the power production of the battery, take the value three times a day, and record the data for one week continuously. The data taken are the current and voltage of the battery. Data is recorded at 9:00 am, 13:00 noon, and 17:00 pm every day. The statistical time is one week, with a total of 21 numbers. See Table 2 for details.
[0055] Table 2 Electricity production data of microbial fuel cell system
[0056] Numbering
[0057] It can be seen from Table 2 that the power generation capacity of the battery system is improved steadily, the highest current reaches 0.390mA, and the voltage reaches 176.1mV.
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Abstract
The invention relates to the technical field of microbial fuel cells, in particular to a method for preparing a microbial fuel cell electrode material employing rape stalks. The method comprises the steps as follows: rape stalks are sheared, dried and mixed with an H2SO4 solution in a hydrothermal reactor; the mass concentration of H2SO4 is 10%, 30% or 50%; reaction is carried out at 150 DEG C for 3 hours; the solution is cooled and then subjected to suction filtration to neutrality; the product is mixed with distilled water at the ratio of 1 to 1.5; the mixture is further put into the hydrothermal reactor, reacts at 120 DEG C for 3 hours, and is dried after suction filtration to obtain hydrothermal carbon; the sample is carbonized in a nitrogen condition in a tube furnace; the carbonization temperature is 400 DEG C; the heating rate is 10 DEG C/min; the nitrogen flow rate is controlled at 0.6L/min; the carbonized sample is soaked with 5wt% HCl for 6 hours and washed to neutrality; and the product is soaked with 3wt% HF for 6 hours, washed to neutrality and dried. The method is simple; and the prepared electrode is large in specific surface area, high in specific capacitance, good in biocompatibility, high in electron transfer rate and good in electricity production effect.
Description
technical field [0001] The invention relates to the technical field of microbial fuel cells, in particular to a method for preparing electrode materials of microbial fuel cells by using rapeseed stalks. Background technique [0002] The depletion of fossil energy and the resulting environmental pollution have been plagued by today's society. The long-term rapid development has caused huge damage to the ecological environment. Environmental Pollution. [0003] A microbial fuel cell (MFC) is a device that converts chemical energy into electrical energy through the oxidation of organic fuel by microorganisms. It can be applied to the treatment of polluted water and soil, realize the energy absorption of organic matter fuel and purify water and soil at the same time, and achieve the dual utilization of environment and energy. [0004] The anode of the microbial fuel cell is the area where the microbial biofilm attaches, which is responsible for the function of transferring ele...
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