One-step preparation of eggplant-derived hierarchical porous graphitic biochar as efficient oxygen reduction catalyst in microbial fuel cells

Zha, Zhengtai; Zhi, Zhang; Xiang, Ping; Zhu, Huayun; Zhou, Bangmei; Sun, Zhulong; Zhou, Shun

doi:10.1039/d0ra09976g

Cited by 42 publications

(15 citation statements)

References 48 publications

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“…Although the maximal CD and PD of the CMFC with the AC electrode (control treatment) were 0.132±0.000 A/m 2 (16.500±0.001 A/m 3 ) and 0.007±0.000 W/m 2 (0.833±0.001 W/m 3 ) respectively. Single chamber MFC Water hyacinth 900 0.027 [25] Single chamber MFC Egg plant 800 0.667 [26] Stack MFC Corn cob 100-500 0.038 [27] Dual chamber MFC Rice straw 450 NA [28] Table 1. Comparison of biochar-based electrodes used in MFC.…”

Section: Resultsmentioning

confidence: 99%

Modified Water Hyacinth Biochar as a Low-Cost Supercapacitor Electrode for Electricity Generation From Pharmaceutical Wastewater

Chaijak¹,

Michu²

2022

Pol. J. Environ. Stud.

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The biochar electrode is an alternative low-cost electrode for electricity generation and wastewater treatment by the microbial fuel cell (MFC). In this study, the water hyacinth biochar (WHB) was prepared by pyrolysis at 350ºC and activated by chemical immersion. The activated WHB was integrated with ceramic-separator MFC (CMFC) and used for the pharmaceutical wastewater (containing 100 µg/mL penicillin) treatment and electricity generation. The maximal power output and penicillin removal of 0.032±0.001 W/m 2 and 65.12±0.02% were achieved. This study gained new knowledge of using the WHB electrode coupled with the CMFC for pharmaceutical wastewater treatment and electricity generation.

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Section: Resultsmentioning

confidence: 99%

Modified Water Hyacinth Biochar as a Low-Cost Supercapacitor Electrode for Electricity Generation From Pharmaceutical Wastewater

Chaijak¹,

Michu²

2022

Pol. J. Environ. Stud.

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“…The formation of the pore structure of the material mainly utilizes the following mechanisms, as shown in eqn (3)- (8). First, K 2 FeO 4 starts to react and be decomposed at 300 °C to form Fe(OH) 3 , KOH, Fe 2 O 3 , and K 2 O.…”

Section: Materials Characterizationmentioning

confidence: 99%

“…Furthermore, MSAC-750 has the highest content of pyridine-N and Fe-N X , which allows for more active sites of the ORR. 8 As shown in Fig. 6(a), the Tafel curve can also be used to study the catalytic performance of different MSAC catalysts.…”

Section: Electrochemical Activitymentioning

confidence: 99%

Fe/N codoped porous graphitic carbon derived from macadamia shells as an efficient cathode oxygen reduction catalyst in microbial fuel cells

et al. 2022

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Section: Biochar: a Promising Electrode Materialsmentioning

confidence: 99%

“…Many studies have recently shown the applicability of biochars as anodes, cathodes, and semipermeable membrane materials in MFCs [7,[22][23][24][25][26][27]. Biochars are complex, heterogeneous materials consisting of mineral phases, amorphous carbon, graphitic carbon, and labile organic molecules, many of which can be either electron donors or acceptors [7,24]. Joseph et al reported in [28] that nanoparticles with redox-active Fe-and Mn-based minerals, usually present in high-temperature biochars, play an important role in mediating the direct electronic transfer (DET) among bacteria (such as Geobacter spp and Shewanella oneidensis) and the anode.…”

Section: Biochar: a Promising Electrode Materialsmentioning

confidence: 99%

Use of Biochar-Based Cathodes and Increase in the Electron Flow by Pseudomonas aeruginosa to Improve Waste Treatment in Microbial Fuel Cells

Nastro¹,

Flagiello

Gambino

et al. 2021

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In this paper, we tested the combined use of a biochar-based material at the cathode and of Pseudomonas aeruginosa strain in a single chamber, air cathode microbial fuel cells (MFCs) fed with a mix of shredded vegetable and phosphate buffer solution (PBS) in a 30% solid/liquid ratio. As a control system, we set up and tested MFCs provided with a composite cathode made up of a nickel mesh current collector, activated carbon and a single porous poly tetra fluoro ethylene (PTFE) diffusion layer. At the end of the experiments, we compared the performance of the two systems, in the presence and absence of P. aeruginosa, in terms of electric outputs. We also explored the potential reutilization of cathodes. Unlike composite material, biochar showed a life span of up to 3 cycles of 15 days each, with a pH of the feedstock kept in a range of neutrality. In order to relate the electric performance to the amount of solid substrates used as source of carbon and energy, besides of cathode surface, we referred power density (PD) and current density (CD) to kg of biomass used. The maximum outputs obtained when using the sole microflora were, on average, respectively 0.19 Wm−2kg−1 and 2.67 Wm−2kg−1, with peaks of 0.32 Wm−2kg−1 and 4.87 Wm−2kg−1 of cathode surface and mass of treated biomass in MFCs with biochar and PTFE cathodes respectively. As to current outputs, the maximum values were 7.5 Am−2 kg−1 and 35.6 Am−2kg−1 in MFCs with biochar-based material and a composite cathode. If compared to the utilization of the sole acidogenic/acetogenic microflora in vegetable residues, we observed an increment of the power outputs of about 16.5 folds in both systems when we added P. aeruginosa to the shredded vegetables. Even though the MFCs with PTFE-cathode achieved the highest performance in terms of PD and CD, they underwent a fouling episode after about 10 days of operation, with a dramatic decrease in pH and both PD and CD. Our results confirm the potentialities of the utilization of biochar-based materials in waste treatment and bioenergy production.

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One-step preparation of eggplant-derived hierarchical porous graphitic biochar as efficient oxygen reduction catalyst in microbial fuel cells

Abstract: Eggplant-derived hierarchical porous graphitic biochar possessed good electrochemical performance as oxygen reduction reaction catalyst for microbial fuel cells.

Cited by 42 publications

References 48 publications

Modified Water Hyacinth Biochar as a Low-Cost Supercapacitor Electrode for Electricity Generation From Pharmaceutical Wastewater

Modified Water Hyacinth Biochar as a Low-Cost Supercapacitor Electrode for Electricity Generation From Pharmaceutical Wastewater

Fe/N codoped porous graphitic carbon derived from macadamia shells as an efficient cathode oxygen reduction catalyst in microbial fuel cells

Use of Biochar-Based Cathodes and Increase in the Electron Flow by Pseudomonas aeruginosa to Improve Waste Treatment in Microbial Fuel Cells

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