Polyaniline/zinc oxide nano composite resistor type material sensor and preparation method thereof
A zinc oxide nanometer and composite resistor technology, applied in the field of sensors, can solve the problems of hidden safety hazards, restricted use, and difficulties in the development and application of flexible optoelectronic devices, and achieve the effects of less energy consumption, accelerated response, and easy development and application.
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[0024] Example 1
[0025] The preparation method of the method of the present invention comprises the following steps:
[0026] ① Prepare a mixed solution of zinc acetate and polyvinyl alcohol, namely spinning solution, water is the solvent, the concentration of zinc acetate is 100mg / mL, and the concentration of polyvinyl alcohol is 100mg / mL; wherein zinc acetate can be any energy Metal salts that are soluble in spinning solution solvents and have good compatibility with spinning aids, including but not limited to zinc acetate, zinc nitrate, and zinc chloride; polyvinyl alcohol can be any one or more spinnable Water-soluble polymers, including but not limited to polyvinyl alcohol, polyvinyl acetate, polyethylene glycol, polyacrylic acid.
[0027] 2. The electrospinning solution in step ① is deposited on the ceramic substrate in the form of nanofibers under the electrospinning conditions with a flow rate of 0.2 mL / h; a receiving distance of 13 cm; a spinning voltage of 13 kV...
Example Embodiment
[0031] Example 2
[0032] ① Prepare a mixed solution of zinc acetate and polyvinyl alcohol, namely spinning solution, the concentration of zinc acetate is 10mg / mL, and the concentration of polyvinyl alcohol is 40mg / mL;
[0033] ② The electrospinning solution in step ① is deposited on the ITO glass in the form of nanofibers under the electrospinning conditions with a flow rate of 0.1 mL / h; a receiving distance of 5 cm; a spinning voltage of 5 kV; and a receiving time of 30 min;
[0034] ③ drying the nanofiber-deposited substrate obtained in step ②, and then performing a hydrothermal treatment at 90° C. for 48 hours to obtain a substrate on which semiconductor zinc oxide nanostructures are grown in situ, and the preparation method;
[0035] ④ Step ③ The prepared substrate with the semiconductor zinc oxide nanostructure is dip-coated with a layer of 30 mg / ml polyaniline to prepare a gas sensor.
Example Embodiment
[0036] Example 3
[0037] ① Prepare a mixed solution of zinc chloride and polyvinylpyrrolidone, namely spinning solution, the concentration of zinc chloride is 300mg / mL, and the concentration of polyvinylpyrrolidone is 100mg / mL;
[0038] ② The electrospinning solution in step ① is deposited on the glass substrate in the form of nanofibers under the electrospinning conditions with a flow rate of 10 mL / h; a receiving distance of 30 cm; a spinning voltage of 30 kV; and a receiving time of 0.5 min;
[0039] (3) drying the substrate with nanofibers deposited in step (2), and then performing hydrothermal treatment at 120° C. for 6 hours to obtain a substrate with in-situ growth of semiconductor zinc oxide nanostructures;
[0040] ④ Dip coating a layer of 0.5 mg / ml polyaniline on the substrate with the semiconductor zinc oxide nanostructure obtained in step ③ to prepare a gas sensor.
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