Microbial fuel cell and preparation method and application thereof
A technology for fuel cells and microorganisms, which is applied in the field of microbial fuel cells and their preparation, and can solve the problems that the output power cannot meet the expected demand, the operation is unstable, and the activity is insufficient.
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Embodiment 1
[0097] 1. Preparation of 3DPG nanomaterials:
[0098] (1) Prepare graphene oxide by the Hummers method (refer to the 12th paragraph in the patent CN108395578A), and then add deionized water to disperse (the quality (mg) of graphene oxide is 3 times the volume (ml) of deionized water) to obtain the concentration 3mg / mL graphene oxide suspension;
[0099] (2) Take 3mg / mL 20mL graphene oxide suspension and mix evenly with 0.132mol / L KOH, and mix it with a piece of 2×3cm 2 Put the carbon cloth together into the reactor for hydrothermal reaction at 180°C for 5 hours to obtain graphene gel;
[0100] (3) The obtained graphene gel was freeze-dried for 2 days to obtain 3DPG nanomaterials.
[0101] 2. PNCO x Preparation of nanomaterials:
[0102] (1) Preparation of NCO nanomaterials:
[0103] ① Preparation of flexible carbon cloth substrate: the size is 2 × 3cm 2 The flexible carbon is placed in absolute ethanol for ultrasonic treatment to obtain a flexible carbon cloth substrate;...
Embodiment 2
[0117] (1) The 3DPG nanomaterial prepared in embodiment 1 is carried out field emission scanning electron microscope test, the result is as follows figure 1 shown.
[0118] From figure 1 It can be seen that the 3DPG nanomaterials are in the shape of three-dimensional mesoporous pores.
[0119] (2) Raman spectrum and high-resolution XPS characterization are carried out respectively to the 3DPG nano material that embodiment 1 prepares, the result is as follows figure 2 shown.
[0120] From figure 2 a It can be seen that the ratio of the two peak intensities of 3DPG nanomaterials I D : I G reached 0.93, indicating that the 3DPG nanomaterials have very abundant defects at the edges and planes of graphitic flakes. It can be seen from 2b that the C 1s peak fitting is divided into four peaks, corresponding to the C-C bonds, C-OH bonds, C=O bonds and C=O-OH bonds that occupy the main components, respectively.
[0121] (3) to the PNCO that embodiment 1 prepares x The nanomate...
Embodiment 3
[0133] (1) Utilize the Arbin battery test system to test the electrochemical performance of the microbial fuel cell prepared in embodiment 1, at first record the polarization curve and output power of the battery by adjusting the method of load external resistance, the results are as follows Figure 8 shown.
[0134] From Figure 8 It can be seen that the PNCO prepared in Example 1 x The open circuit potential of nanomaterials as the cathode of microbial fuel cells is about 0.59V, which is very close to the open circuit of microbial fuel cells (0.60V) with Pt / C as the cathode; and as the external resistance of the load continues to increase, the PNCO x The decrease rate of the voltage of the microbial fuel cell (0.60V) with nanomaterials as the cathode is slower than that of the microbial fuel cell with Pt / C as the cathode, which proves the faster charge transfer rate inside the battery.
[0135] In addition, to PNCO x Microbial fuel cell with nanomaterials as cathode at 2....
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