Composite sensing membrane composed of polypyrrole, fluorescein isothiocyanate and porous alumina as well as preparation method and application thereof

摘要: The invention discloses a composite sensing membrane composed of polypyrrole, fluorescein isothiocyanate and porous alumina as well preparation method an application the membrane. is formed by orderly coating inner walls hole with polypyrrole isothiocyanate, wherein 70-90 mu m, density 109-1011/cm , holes are through holes, diameter each 26-35nm. comprises following steps of: dropping pyrrole ethanol solution ferric chloride to membrane; putting under negative pressure equal or less than 0.1MPa for at least 10min; carrying out ultrasonic cleaning deionized water so obtain coated on surface wall holes; then immersing into concentration 10 M one hour; washing target product (composite membrane). According membrane, trace 2,3,3'-trichlorodiphenyl can be effectively detected.