Concentrated sulfuric acid

Palladium chloride (PaCl₂, 98%), pyrrole (C₄H₅N, 98%), formic acid (HCOOH, 98%), and Nafion solution were purchased from Aladdin Ltd. Graphite powder, potassium permanganate (KMnO₄, 98%), concentrated sulfuric acid (H₂SO₄, 98.3%), concentrated nitric acid (HNO₃, 98%), and sodium nitrate (NaNO₃, 99%) were purchased from Shanghai Chemical Reagent Factory. Pyrrole was purified by distillation under reduced pressure before polymerization. All other chemicals are analytical grade and could be used without further purification.

Concentrated sulfuric acid (H₂SO₄, 98%), thiourea (CH₄N₂S), hexaammonium molybdate ((NH₄)₆Mo₇O₂₄), N, N-Dimethylacetamide (DMAc), triethylamine (TEA), 4,4′-oxidianiline (ODA), and pyromellitic dianhydride (PMDA) were purchased from Shanghai Chemical Reagent Company. Deionized (DI) water was used throughout the experiments.

Dictyophora indusiata was purchased in Nanping Shengli Market. After the Dictyophora indusiata is air-dried, it is fully ground into powder by a high-speed pulverizer. DPPH (1,1-diphenyl-2-picroyl), ABTS (total antioxidant activity kit), PMS, NATB were purchased from Sigma Company in the United States (America). EDTA, trichloroacetic acid, ascorbic acid, Tris-hydrochloric acid buffer, H₂O₂ absolute ethanol, chloroform, sodium chloride, concentrated sulfuric acid, chloroform, n-butanol were purchased from Shanghai Chemical Reagent Factory (Shanghai, China). Methanol, trifluoroacetic acid, sodium hydroxide and sodium acetate trihydrate were purchased from sigma (Sigma–Aldrich, St. Louis, MO, USA). The chemicals and solvents used in this study were of analytical grade.