▎ 摘　　要

NOVELTY - Hydroxyapatite/graphene aerogel anode comprises graphene oxide and hydroxyapatite. USE - Hydroxyapatite/graphene aerogel anode is used for preparing a microbial fuel cell (claimed). ADVANTAGE - The hydroxyapatite/graphene aerogel anode has larger specific surface area, better biocompatibility and conductivity. The high performance aerogel anode makes microbial fuel cell startup time. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: (1) a method for preparing a microbial fuel cell, which involves placing a hydroxyapatite/graphene aerogel anode and a cathode in an anode chamber and a cathode chamber with a volume of 100 mL, respectively, providing catholyte, and using a proton membrane to connect the anode chamber to the cathode chamber to obtain a dual-chamber microbial fuel cell, the cathode is a carbon plate, carbon felt, carbon paper, or carbon fiber brush, the anode electrolyte is composed of a saturated N2 M9 buffer solution containing 18 millimolar lactate and a suspension of Shewans putrefaction bacteria, and the catholyte is composed of 0.1 Molar phosphate buffer solution comprising 50 millimolar potassium ferricyanide (K3Fe(CN)6); and (2) a method for preparing a hydroxyapatite/graphene aerogel anode, which involves preparing graphene oxide aqueous solution, preparing hydroxyapatite suspension, preparing hydroxyapatite/graphene hydrogel, and preparation of hydroxyapatite/graphene aerogel anode involves dispersing 30-120 mg of graphene oxide in 30 mL of ultrapure water and sonicate for 15-30 minutes to obtain a uniformly dispersed 1-4 mg/mL graphene oxide aqueous solution, dispersing 20-50 mg of hydroxyapatite in 10 mL of ultrapure water and sonicating for 15-30 minutes to obtain a uniformly dispersed 2-5 mg/mL hydroxyapatite suspension, adding 1-4 mL of the hydroxyapatite suspension to 20 mL of the graphene oxide aqueous solution, at a frequency of 40 kilohertz, sonicating for 1-3 minutes, then adding 100-1000 mu L of reducing agent, sonicating for 15-30 minutes, and then heating at 120-180 degrees C for 8-12 hours to obtain a hydroxyapatite/graphene hydrogel, dialyzing the hydroxyapatite/graphene hydrogel in 500 mL of a 10-20% ethanol solution by volume for 48 hours and freeze-drying in a vacuum freezer to obtain a hydroxyapatite/graphene aerogel anode.