CN104466201A - Preparation method of modified anode of marine sediment microbial fuel cell - Google Patents
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- 239000013049 sediment Substances 0.000 title claims abstract description 26
- 239000000446 fuel Substances 0.000 title claims abstract description 24
- 230000000813 microbial effect Effects 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 51
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 35
- 239000010439 graphite Substances 0.000 claims abstract description 35
- 239000005995 Aluminium silicate Substances 0.000 claims abstract description 12
- 235000012211 aluminium silicate Nutrition 0.000 claims abstract description 12
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims abstract description 12
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229940099596 manganese sulfate Drugs 0.000 claims abstract description 8
- 235000007079 manganese sulphate Nutrition 0.000 claims abstract description 8
- 239000011702 manganese sulphate Substances 0.000 claims abstract description 8
- SQQMAOCOWKFBNP-UHFFFAOYSA-L manganese(II) sulfate Chemical compound [Mn+2].[O-]S([O-])(=O)=O SQQMAOCOWKFBNP-UHFFFAOYSA-L 0.000 claims abstract description 8
- LAIZPRYFQUWUBN-UHFFFAOYSA-L nickel chloride hexahydrate Chemical compound O.O.O.O.O.O.[Cl-].[Cl-].[Ni+2] LAIZPRYFQUWUBN-UHFFFAOYSA-L 0.000 claims abstract description 8
- NDLPOXTZKUMGOV-UHFFFAOYSA-N oxo(oxoferriooxy)iron hydrate Chemical compound O.O=[Fe]O[Fe]=O NDLPOXTZKUMGOV-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000002245 particle Substances 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 7
- 239000011572 manganese Substances 0.000 claims abstract description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims abstract description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 12
- 239000003822 epoxy resin Substances 0.000 claims description 12
- 229920000647 polyepoxide Polymers 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 6
- 239000011259 mixed solution Substances 0.000 claims description 6
- 229910017604 nitric acid Inorganic materials 0.000 claims description 6
- 239000000243 solution Substances 0.000 claims description 4
- 230000008859 change Effects 0.000 claims description 3
- 239000008367 deionised water Substances 0.000 claims description 3
- 229910021641 deionized water Inorganic materials 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 239000011159 matrix material Substances 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 239000002994 raw material Substances 0.000 abstract description 2
- 239000002131 composite material Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 6
- 239000013535 sea water Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 244000005700 microbiome Species 0.000 description 4
- YNPNZTXNASCQKK-UHFFFAOYSA-N phenanthrene Chemical compound C1=CC=C2C3=CC=CC=C3C=CC2=C1 YNPNZTXNASCQKK-UHFFFAOYSA-N 0.000 description 4
- BBEAQIROQSPTKN-UHFFFAOYSA-N pyrene Chemical compound C1=CC=C2C=CC3=CC=CC4=CC=C1C2=C43 BBEAQIROQSPTKN-UHFFFAOYSA-N 0.000 description 4
- 239000013505 freshwater Substances 0.000 description 3
- 239000005416 organic matter Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- GVEPBJHOBDJJJI-UHFFFAOYSA-N fluoranthrene Natural products C1=CC(C2=CC=CC=C22)=C3C2=CC=CC3=C1 GVEPBJHOBDJJJI-UHFFFAOYSA-N 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000027756 respiratory electron transport chain Effects 0.000 description 2
- 229910002588 FeOOH Inorganic materials 0.000 description 1
- 239000010405 anode material Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005202 decontamination Methods 0.000 description 1
- 230000003588 decontaminative effect Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003631 expected effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000002957 persistent organic pollutant Substances 0.000 description 1
- 125000005575 polycyclic aromatic hydrocarbon group Chemical group 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005067 remediation Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Abstract
本发明提供了一种海洋沉积物微生物燃料电池改性阳极的制备方法，属于微生物燃料电池技术领域，其步骤为：取直径为1.6cm，长10cm，表面积为54cm2的石墨棒作为石墨阳极，分别用180、360、600、800的砂纸打磨石墨表面至光滑，以四氧化三铁、硫酸锰、石墨粉、高岭土和六水氯化镍为原料制作Mn2++Fe3O4+Ni2+石墨阳极，其中石墨粉的粒径为500目，高岭土的粒径为400目，将四氧化三铁、硫酸锰、石墨粉、高岭土和六水氯化镍分别按照6%、3%、58%、30%和2%的质量比例进行混合，总质量为4克；本发明的优点是本发明的制备方法制得的复合阴极的导电性得到明显提升。The invention provides a method for preparing a modified anode of a marine sediment microbial fuel cell, which belongs to the technical field of microbial fuel cells. The steps are: taking a graphite rod with a diameter of 1.6 cm, a length of 10 cm, and a surface area of 54 cm as the graphite anode, Use 180, 360, 600, 800 sandpaper to polish the graphite surface until smooth, and use ferric oxide, manganese sulfate, graphite powder, kaolin and nickel chloride hexahydrate as raw materials to make Mn 2+ +Fe 3 O 4 +Ni 2 + Graphite anode, wherein the particle size of graphite powder is 500 mesh, and the particle size of kaolin is 400 mesh. Ferric oxide, manganese sulfate, graphite powder, kaolin and nickel chloride hexahydrate are respectively mixed according to 6%, 3%, 58 %, 30% and 2% by mass, and the total mass is 4 grams; the advantage of the present invention is that the electrical conductivity of the composite cathode prepared by the preparation method of the present invention is significantly improved.
Description
技术领域 technical field
本发明涉及一种海洋沉积物微生物燃料电池改性阳极的制备方法，属于微生物燃料电池技术领域。 The invention relates to a method for preparing a modified anode of a marine sediment microbial fuel cell, belonging to the technical field of microbial fuel cells.
背景技术 Background technique
沉积物微生物燃料电池（SMFCs）是一种典型的无膜微生物燃料电池，其作用机理为：将阳极材料放置于厌氧的沉积物中，阴极材料位于上层好氧的水相中，阴极和阳极之间通过导线和电阻相连接，沉积物中有机物在阳极区附近被沉积物中土著微生物氧化分解，产生的电子传递到阳极，再经过外电路到达阴极，与阴极区中的氧气和从阳极区传递来的质子结合生成水，从而实现在去除沉积物中有机污染物的同时又产生电流的目的。 Sediment microbial fuel cells (SMFCs) are a typical non-membrane microbial fuel cell. The organic matter in the sediment is oxidized and decomposed by the indigenous microorganisms in the sediment near the anode area, and the electrons generated are transferred to the anode, and then reach the cathode through an external circuit, and the oxygen in the cathode area and from the anode area The transferred protons combine to form water, thereby achieving the purpose of generating electric current while removing organic pollutants in the sediment.
沉积物微生物燃料电池（SMFCs）不仅可以为海洋或内陆水体的长期监测仪器提供低功率电源，同时可用于沉积物原位生物修复。Hong等采用石墨作为电极所制作的SMFCs，经过5个月的运行，平均电流密度为20.4mA/m2，沉积物中总有机质含量下降了21.9%，易氧化有机物的含量下降了32.7% (Hong et al.,2008)；Yan等采用SMFCs添加无定型铁（FeOOH）的组合技术，研究其降解湖泊沉积物中菲和芘的效果，结果显示其对沉积物中菲、芘的去除率分别为99.47±0.15%、94.79±0.63%，对于湖泊沉积物中多环芳烃污染有着显著的控制和修复效应。 Sediment microbial fuel cells (SMFCs) can not only provide low-power power supply for long-term monitoring instruments of marine or inland water bodies, but also can be used for in-situ bioremediation of sediments. Hong et al. used graphite as the electrode to make SMFCs. After 5 months of operation, the average current density was 20.4mA/m 2 , the content of total organic matter in the sediment decreased by 21.9%, and the content of easily oxidized organic matter decreased by 32.7% (Hong et al. et al. ,2008); Yan et al. used the combined technology of adding amorphous iron (FeOOH) to SMFCs to study the effect of degrading phenanthrene and pyrene in lake sediments. The results showed that the removal rates of phenanthrene and pyrene in sediments were 99.47±0.15%, 94.79±0.63%, have significant control and remediation effects on polycyclic aromatic hydrocarbon pollution in lake sediments.
另外SMFCs在海洋中应用有一个非常有利的条件，就是海水的导电性强，更容易发挥SMFCs的作用。Holmes等的研究发现，海水SMFCs最大电流密度为20 mA/m2，而淡水SMFCs最大电流密度只有10 mA/m2，其原因主要是海水比淡水的导电性好（Holmes et al,2004）。在20℃下海水的导电性能为50000 uS/cm，而淡水的导电性能只有 500 uS/cm，同时海水对于沉积物燃料电池阴极有腐蚀作用，阴极的腐蚀作用一方面可提高其比表面积，其次可形成生物膜有利于阴极氧还原性能的提高(Bergel et al,2005)。Tender等人在俄勒冈州的Yaquina湾的河口和纽约的Tuckerton附近盐沼地区两个地点分别进行了SMFCs现场实验，两个地点沉积物中的有机碳含量分别为2-6%和4-6%，功率密度曲线表明在Yaquina和Tuckerton两地沉积物燃料电池可以持续输出的功率密度分别为28 mW/m2和27 mW/m2，阳极表面富集的微生物种类主要为地杆菌科（Tender et al,2002）。Ryckelynck等人在亚奎纳湾安装了相同类型的海底沉积物微生物燃料电池，电池系统输出了大约33 mW/m2的持续功率密度，这和Tende等人报道的数值相接近(Ryckelynck et al,2005)。因此利用沉积物微生物燃料电池进行产电有着得天独厚的优势。 In addition, there is a very favorable condition for the application of SMFCs in the ocean, that is, the high conductivity of seawater makes it easier to play the role of SMFCs. Holmes et al. found that the maximum current density of seawater SMFCs is 20 mA/m 2 , while that of freshwater SMFCs is only 10 mA/m 2 , mainly because seawater has better conductivity than freshwater (Holmes et al , 2004). At 20°C, the conductivity of seawater is 50,000 uS/cm, while that of fresh water is only 500 uS/cm. At the same time, seawater has a corrosive effect on the cathode of sediment fuel cells. The corrosion of the cathode can increase its specific surface area on the one hand, and secondly The formation of biofilm is beneficial to the improvement of cathode oxygen reduction performance (Bergel et al , 2005). Tender et al conducted SMFCs field experiments at the estuary of Yaquina Bay in Oregon and the salt marsh near Tuckerton in New York. The organic carbon content in the sediments of the two sites was 2-6% and 4-6%, respectively. , the power density curves show that the sediment fuel cells in Yaquina and Tuckerton can continuously output power densities of 28 mW/m 2 and 27 mW/m 2 respectively, and the microorganisms enriched on the anode surface are mainly Geobacteriaceae (Tender et al . al ,2002). Ryckelynck et al. installed the same type of submarine sediment microbial fuel cell in Yaquina Bay, and the battery system output a continuous power density of about 33 mW/m 2 , which is close to the value reported by Tende et al. (Ryckelynck et al , 2005). Therefore, the use of sediment microbial fuel cells for electricity generation has unique advantages.
虽然沉积物微生物燃料电池（SMFCs）在污染环境处理、产电等多个领域有着良好的应用前景，但现有的微生物燃料电池的导电性通常较低，往往需要较大的导电电流和电压才能获得预期的效果，其功率损耗较大，而不同阳极材料与结构的选择和设计对于SMFCs的产电能力和去污效果有重要的影响。为了解决上述困难，需要开发一种可以提升阳极导电性的海洋沉积物微生物燃料电池改性阳极的制备方法。 Although sediment microbial fuel cells (SMFCs) have good application prospects in many fields such as polluted environment treatment and power generation, the conductivity of existing microbial fuel cells is usually low, and they often require a large conductive current and voltage to be To obtain the expected effect, the power loss is relatively large, and the selection and design of different anode materials and structures have an important impact on the power generation capacity and decontamination effect of SMFCs. In order to solve the above difficulties, it is necessary to develop a method for preparing a modified anode for marine sediment microbial fuel cells that can improve the conductivity of the anode. the
发明内容 Contents of the invention
本发明的目的是提供一种海洋沉积物微生物燃料电池改性阳极的制备方法。 The purpose of the present invention is to provide a method for preparing a modified anode of a marine sediment microbial fuel cell.
本发明主要解决的技术问题是现有制备方法获得的阳极的导电性不能满足要求的问题。 The technical problem mainly solved by the invention is that the conductivity of the anode obtained by the existing preparation method cannot meet the requirement.
为了实现本发明的目的，本发明采用的技术方案是： In order to realize the purpose of the present invention, the technical scheme adopted in the present invention is:
一种海洋沉积物微生物燃料电池改性阳极的制备方法，包括以下步骤： A preparation method for a marine sediment microbial fuel cell modified anode, comprising the following steps:
（1）取直径为1.6 cm，长10 cm，表面积为54 cm2的石墨棒作为石墨阳极，分别用180、 360、600、800的砂纸打磨石墨表面至光滑； (1) Take a graphite rod with a diameter of 1.6 cm, a length of 10 cm, and a surface area of 54 cm2 as a graphite anode, and polish the graphite surface to smooth with 180, 360, 600, and 800 sandpaper, respectively;
（2）以四氧化三铁、硫酸锰、石墨粉、高岭土和六水氯化镍为原料制作Mn2++Fe3O4+Ni2+石墨阳极，其中石墨粉的粒径为500目，高岭土的粒径为400目；将四氧化三铁、硫酸锰、石墨粉、高岭土和六水氯化镍分别按照6%、3%、58%、30%和2%的质量比例进行混合，总质量为4 克； (2) Mn 2+ +Fe 3 O 4 +Ni 2+ graphite anode was made from ferric oxide, manganese sulfate, graphite powder, kaolin and nickel chloride hexahydrate, wherein the particle size of the graphite powder was 500 mesh, The particle size of kaolin is 400 orders; Ferric oxide, manganese sulfate, graphite powder, kaolin and nickel chloride hexahydrate are mixed according to the mass ratio of 6%, 3%, 58%, 30% and 2% respectively, the total Mass is 4 grams;
（3）混合均匀后加入一定量的去离子水，涂于石墨电极四个侧面，在80℃温度下干燥45 min，然后将石墨电极置于马弗炉中，在380℃～450℃温度下焙烧48 h； (3) After mixing evenly, add a certain amount of deionized water, apply it on the four sides of the graphite electrode, dry at 80°C for 45 minutes, then place the graphite electrode in a muffle furnace, and heat it at a temperature of 380°C to 450°C Roasting for 48 hours;
（4）在预处理好的石墨一端打一小孔，向孔中加入导电环氧树脂，将导线裸露部分插入孔中的环氧树脂中，但是要保证导线的裸露部分不能与石墨基体相接触； (4) Make a small hole at one end of the pretreated graphite, add conductive epoxy resin to the hole, insert the exposed part of the wire into the epoxy resin in the hole, but ensure that the exposed part of the wire cannot contact the graphite matrix ;
（5）等导电环氧树脂凝固了以后，用万用表测试电极和导线之间的链接是否良好，然后用绝缘的环氧树脂将小孔余下的部分填满，晾干干燥保存； (5) After the conductive epoxy resin is solidified, use a multimeter to test whether the connection between the electrode and the wire is good, and then fill the remaining part of the small hole with insulating epoxy resin, dry and store;
（6）配制体积比为5: 2～5: 3的45%的硫酸和36%的浓硝酸的混合溶液； (6) Prepare a mixed solution of 45% sulfuric acid and 36% concentrated nitric acid with a volume ratio of 5: 2 to 5: 3;
（7）将前处理好的石墨阳极在溶液中浸泡30分钟，反应温度为65℃； (7) Soak the pre-treated graphite anode in the solution for 30 minutes, and the reaction temperature is 65°C;
（8）将处理好的石墨阳极去除，纯净水反复浸泡，直到pH值不发生变化； (8) Remove the treated graphite anode and soak in pure water repeatedly until the pH value does not change;
（9）将清洗好的改性石墨阳极放入鼓风干燥箱，80℃干燥12小时。 (9) Put the cleaned modified graphite anode into a blast drying oven, and dry at 80°C for 12 hours.
所述马弗炉温度为400摄氏度。 The temperature of the muffle furnace is 400 degrees Celsius.
所述45%硫酸和36%浓硝酸的混合溶液体积比为5: 2。 The mixed solution volume ratio of described 45% sulfuric acid and 36% concentrated nitric acid is 5: 2.
本发明的优点是：相较于现有技术，本发明的制备方法制得的改性阳极的导电性得到明显提升，提高了阳极微生物动力学活性，加速了胞外电子传递速率，提高了微生物燃料电池的电化学性能和输出功率，该制备方法工艺简单，原料成本低，制得的改性阳极机械强度高，适于微生物燃料电池的工程化应用。 The advantages of the present invention are: compared with the prior art, the conductivity of the modified anode prepared by the preparation method of the present invention is significantly improved, the kinetic activity of the anode microorganisms is improved, the extracellular electron transfer rate is accelerated, and the microbial The electrochemical performance and output power of the fuel cell, the preparation method has simple process, low raw material cost, high mechanical strength of the prepared modified anode, and is suitable for the engineering application of the microbial fuel cell.
具体实施方式 Detailed ways
下面将对本发明实施例中的技术方案进行清楚、完整地说明。 The technical solutions in the embodiments of the present invention will be clearly and completely described below.
一种海洋沉积物微生物燃料电池改性阳极的制备方法，包括以下步骤： A preparation method for a marine sediment microbial fuel cell modified anode, comprising the following steps:
（1）取直径为1.6 cm，长10 cm，表面积为54 cm2的石墨棒作为石墨阳极，分别用180, 360, 600, 800的砂纸打磨石墨表面至光滑； (1) Take a graphite rod with a diameter of 1.6 cm, a length of 10 cm, and a surface area of 54 cm2 as a graphite anode, and polish the graphite surface to smooth with 180, 360, 600, and 800 sandpaper, respectively;
（2）以四氧化三铁、硫酸锰、石墨粉、高岭土和六水氯化镍为原料制作Mn2++Fe3O4+Ni2+石墨阳极，其中石墨粉的粒径为500目，高岭土的粒径为400目；将四氧化三铁、硫酸锰、石墨粉、高岭土和六水氯化镍分别按照6%、3%、58%、30%和2%的质量比例进行混合，总质量为4 克； (2) Mn 2+ +Fe 3 O 4 +Ni 2+ graphite anode was made from ferric oxide, manganese sulfate, graphite powder, kaolin and nickel chloride hexahydrate, wherein the particle size of the graphite powder was 500 mesh, The particle size of kaolin is 400 orders; Ferric oxide, manganese sulfate, graphite powder, kaolin and nickel chloride hexahydrate are mixed according to the mass ratio of 6%, 3%, 58%, 30% and 2% respectively, the total Mass is 4 grams;
（3）混合均匀后加入一定量的去离子水，涂于石墨电极四个侧面，在80℃温度下干燥45 min，然后将石墨电极置于马弗炉中，在380℃～450℃温度下焙烧48 h，优选马弗炉温度为400摄氏度； (3) After mixing evenly, add a certain amount of deionized water, apply it on the four sides of the graphite electrode, dry at 80°C for 45 minutes, then place the graphite electrode in a muffle furnace, and heat it at a temperature of 380°C to 450°C Roasting 48 h, the preferred muffle furnace temperature is 400 degrees Celsius;
（4）在预处理好的石墨一端打一小孔，向孔中加入导电环氧树脂，将导线裸露部分插入孔中的环氧树脂中，但是要保证导线的裸露部分不能与石墨基体相接触； (4) Make a small hole at one end of the pretreated graphite, add conductive epoxy resin into the hole, insert the exposed part of the wire into the epoxy resin in the hole, but ensure that the exposed part of the wire cannot contact the graphite matrix ;
（5）等导电环氧树脂凝固了以后，用万用表测试电极和导线之间的链接是否良好，然后用绝缘的环氧树脂将小孔余下的部分填满，晾干干燥保存； (5) After the conductive epoxy resin is solidified, use a multimeter to test whether the connection between the electrode and the wire is good, and then fill the remaining part of the small hole with insulating epoxy resin, dry and store;
（6）配制体积比为5: 2～5: 3的45%的硫酸和36%的浓硝酸的混合溶液，优选45%硫酸和36%浓硝酸的混合溶液体积比为5: 2； (6) preparation volume ratio is the mixed solution of 45% sulfuric acid of 5: 2～5: 3 and the concentrated nitric acid of 36%, preferably the mixed solution volume ratio of 45% sulfuric acid and 36% concentrated nitric acid is 5: 2;
（7）将前处理好的石墨阳极在溶液中浸泡30分钟，反应温度为65℃； (7) Soak the pre-treated graphite anode in the solution for 30 minutes, and the reaction temperature is 65°C;
（8）将处理好的石墨阳极去除，纯净水反复浸泡，直到pH值不发生变化； (8) Remove the treated graphite anode and soak in pure water repeatedly until the pH value does not change;
（9）将清洗好的改性石墨阳极放入鼓风干燥箱，80℃干燥12小时。 (9) Put the cleaned modified graphite anode into a blast drying oven, and dry at 80°C for 12 hours.
根据实验结果验证，相较于现有技术，本发明的制备方法制得的改性阳极的导电性得到明显提升，提高了阳极微生物动力学活性，加速了胞外电子传递速率，提高了微生物燃料电池的电化学性能和输出功率。 According to the experimental results, compared with the prior art, the conductivity of the modified anode prepared by the preparation method of the present invention has been significantly improved, the kinetic activity of the anode microorganisms has been improved, the extracellular electron transfer rate has been accelerated, and the microbial fuel efficiency has been improved. The electrochemical performance and output power of the battery.
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| CN113921800A (en) * | 2021-10-11 | 2022-01-11 | 吉林大学 | Preparation of porous silicon as lithium ion battery cathode material by using ocean clay magnesium thermal reduction |
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| CN110034321A (en) * | 2019-02-21 | 2019-07-19 | 浙江海洋大学 | A kind of microbial fuel cell unit for marine culture wastewater of degrading |
| CN113921800A (en) * | 2021-10-11 | 2022-01-11 | 吉林大学 | Preparation of porous silicon as lithium ion battery cathode material by using ocean clay magnesium thermal reduction |
| CN113921800B (en) * | 2021-10-11 | 2024-01-09 | 吉林大学 | Preparation of porous silicon as lithium ion battery anode material by magnesian clay magnesian reduction |
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