The invention relates to a bioelectrode formed by a three-dimensional ordered
porous oxide modified conductive film and a preparation method of the bioelectrode. The bioelectrode comprises a conductive film
electrode which is formed on an insulation substrate, wherein the film
electrode is formed on the insulation substrate in a deposition manner through a
physical vapor deposition process; a three-dimensional ordered
porous oxide layer containing
redox proteins is prepared in situ on the surface of the film
electrode; the
redox proteins are fixed in pores of the three-dimensional ordered
porous oxide layer by adopting an adsorption way, a crosslink way or a covalent bonding way. The pores in the three-dimensional ordered porous
oxide layer of the bioelectrode are communicated with one another, so that the dispersion of
analyte in an ordered porous material modified layer on the surface of the conductive film can be favored, the dispersion capacity of the
analyte can be improved, a mesoporous structure which can be matched with different
enzyme molecules can be obtained by utilizing different mesoporous structure guiding agents, and the fixation of the
enzyme molecules can be favored. The bioelectrode has good biological compatibility, the fixing effect of the
redox proteins is good, the dispersion resistance of the
analyte is small, and the
electron transmission efficiency is high, so that a biological sensor with high sensitivity can be provided.