Composite sensing membrane composed of polypyrrole, fluorescein isothiocyanate and porous alumina as well as preparation method and application thereof
A technology of fluorescein isothiocyanate and porous alumina, which is applied in the fields of fluorescence/phosphorescence, material excitation analysis, etc., can solve the problems that cannot be used for other purposes, cannot be prepared, cannot be used, etc., and achieve the effect of excellent optical properties
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[0027] Example 1
[0028] The specific steps of preparation are:
[0029] Step 1. First, drop the 0.4M pyrrole ethanol aqueous solution and the 0.8M ferric chloride aqueous solution onto the porous alumina film successively; then add the pyrrole ethanol aqueous solution and the iron chloride aqueous solution to the porous oxide film. After the aluminum film is placed under a negative pressure of 0.06 MPa for 12 minutes, it is ultrasonically cleaned with deionized water and ethanol to obtain an approximate figure 1 B and figure 1 The surface and the inner wall of the hole are covered with a porous alumina film of polypyrrole as shown in C.
[0030] Step 2: Put the porous alumina film covered with polypyrrole on the surface and the inner wall of the pores in an ethanol solution of fluorescein isothiocyanate with a concentration of 10-3M and soak for 1.2 hours; then use ethanol to clean the porous alumina film Fluorescein isothiocyanate on the surface, made approximately figure 1 D and...
Example Embodiment
[0031] Example 2
[0032] The specific steps of preparation are:
[0033] Step 1. First, drop the 0.45M pyrrole ethanol aqueous solution and the 0.9M ferric chloride aqueous solution onto the porous alumina film successively; then apply the porous oxidized pyrrole ethanol aqueous solution and the ferric chloride aqueous solution on it. After the aluminum film was placed under a negative pressure of 0.07MPa for 11.5 minutes, it was ultrasonically cleaned with deionized water and ethanol to obtain an approximate figure 1 B and figure 1 The surface and the inner wall of the pores shown in C are covered with a porous alumina film of polypyrrole.
[0034] Step 2. Put the porous alumina film covered with polypyrrole on the surface and the inner wall of the hole at a concentration of 0.5×10 -3 Soak the fluorescein isothiocyanate in ethanol solution of M for 1.2h; then use ethanol to clean the fluorescein isothiocyanate on the surface of the porous alumina film, and the result is similar to ...
Example Embodiment
[0035] Example 3
[0036] The specific steps of preparation are:
[0037] Step 1. First, drop 0.5M pyrrole ethanol aqueous solution and 1M ferric chloride aqueous solution onto the porous alumina film successively; then put on the porous alumina with pyrrole ethanol aqueous solution and ferric chloride aqueous solution. After the film is placed under a negative pressure of 0.08MPa for 11 minutes, it is ultrasonically cleaned with deionized water and ethanol to obtain figure 1 B and figure 1 The surface and the inner wall of the hole are covered with a porous alumina film of polypyrrole as shown in C.
[0038] Step 2. Put the porous alumina film coated with polypyrrole on the surface and the inner wall of the hole at a concentration of 10 -4 Soak the fluorescein isothiocyanate in ethanol solution of M for 1.1h; then use ethanol to clean the fluorescein isothiocyanate on the surface of the porous aluminum oxide film to obtain figure 1 D and figure 1 The curve in E shows a composite sen...
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