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3 protocols using carbon black

1

Synthesis of Transition Metal-Based Electrodes

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All reagents were purchased from suppliers and were used directly without purification. Cobalt nitrate hexahydrate (Co(NO3)2·6H2O, 99%, AR), dimethylimidazole (C4H6N2, 98%), manganese chloride tetrahydrate (MnCl2·4H2O, 99%, AR), and N-methylpyrrolidone (NMP, C5H9NO, 99.5%) were purchased from Aladdin Biochemical Technology Co., Ltd., Shanghai, China. Hydrochloric acid (HCl, 37%), urea (CO(NH2)2, 99%, AR), anhydrous ethanol (C2H6O, ≥95%, AR), ammonium fluoride (NH4F, 96%, AR), nickel nitrate hexahydrate (Ni(NO3)2·6H2O, 98%, AR), nitric acid (HNO3, AR), and carbon black were purchased from Sinopharm Chemical Reagent Co., Ltd., Shanghai, China. Polyvinylidene fluoride (PVDF) was purchased from Yingze LZY Battery Sales Department (Taiyuan, China). Nickle foam was purchased from Tianyu Technology Development Co., Ltd., Heze, China. Active carbon (AC, AR) was purchased from Kuraray Co., Ltd., Tokyo, Japan.
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2

Sterilization and Synthesis of Electrochemical Sensors

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The CPM filters (which involve PP and activated carbon) have been sterilized by a vacuum ultraviolet lamp (ZW4D15Y-Z212, COMWIN, China) for 10 min after recycling. Pyrrole was acquired from Shanghai Macklin Biochemical Co., Ltd. Dopamine hydrochloride (DA, Sigma-H8502) was purchased from Sigma-Aldrich Trading Co., Ltd (Shanghai, China). Manganese dioxide (MnO2, 98.8 %), carbon black (99.5 %), iron trichloride hexahydrate (FeCl3·6H2O), ethanol absolute, N,N-dimethylformamide (DMF, ≥99.5 %), and tris(hydroxymethyl)aminomethane (≥99.5 %) were obtained from Sinopharm Chemical Reagent Co., Ltd (Shanghai, China). All chemicals were analytical reagents.
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3

Synthesis of Conductive Polymer Composites

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Materials. The styrene (Acros, 99%) and pyrrole (Aldrich, 99%) monomers were distilled under reduced pressure to remove the inhibitor and oligomer. Activated carbon (3000 m 2 /g) was purchased from Beijing Carbon Century Technology Co., Ltd. Ferric chloride (FeCl3, 98%), hydrochloric acid (A.R.), polyvinylpyrrolidone (PVP, Mw:1300000), ethanol (A.R.), polyvinylidene fluoride (PVDF), N-methyl 2-pyrrolidone (NMP), and carbon black were all purchased from Sinopharm Chemical Reagent Co and used as received.
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