Fabrication method of PbS/Co3O4 compound signal reduction-type photoelectric chemical immunosensor
An immune sensor, photoelectrochemical technology, applied in scientific instruments, instruments, material analysis through electromagnetic means, etc., can solve the problems of limited application, achieve the effect of improving detection sensitivity, increasing roughness, and accelerating electron transfer rate
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Embodiment 1
[0043] Embodiment 1 A kind of based on PbS / Co 3 o 4 The preparation method of the photoelectrochemical procalcitonin sensor of the composite, the preparation steps are as follows:
[0044] 1) Cut a large piece of ITO conductive glass into 2.0 cm × 0.8 cm, ultrasonically clean it with acetone, ethanol and ultrapure water for 30 min, and blow dry with nitrogen;
[0045] 2) Add 10 µL, 5 mg / mL B-TiO dropwise 2 NPs evenly disperse the suspension to the conductive surface of ITO conductive glass, and dry it at room temperature to obtain B-TiO 2 NPs electrode;
[0046] 3) B-TiO 2 NPs electrodes were in 5 mM Bi(NO) 3 and 5 mM KI solution for 10 s, rinsed with ultrapure water, and repeated the cycle 20 times to obtain B-TiO 2 NPs / BiOI NSs electrodes;
[0047] 4) Add 8 µL of Au NPs solution to B-TiO 2 NPs / BiOI NSs electrode surface, prepared B-TiO 2 NPs / BiOINSs / Au NPs electrodes;
[0048] 5) Drop 5 µL, 8 µg / mL procalcitonin capture antibody solution onto the surface of t...
Embodiment 2
[0052] Embodiment 2 A kind of based on PbS / Co 3 o 4 The preparation method of the photoelectrochemical procalcitonin sensor of the composite, the preparation steps are as follows:
[0053] 1) Cut a large piece of ITO conductive glass into 2.0 cm × 0.8 cm, ultrasonically clean it with acetone, ethanol and ultrapure water for 30 min, and blow dry with nitrogen;
[0054] 2) Add 10 µL, 7 mg / mL B-TiO dropwise 2 NPs evenly disperse the suspension to the conductive surface of ITO conductive glass, and dry it at room temperature to obtain B-TiO 2 NPs electrode;
[0055] 3) B-TiO 2 NPs electrodes were in 8 mM Bi(NO) 3 and 8 mM KI solution for 10 s, rinsed with ultrapure water, and repeated the cycle 25 times to obtain B-TiO 2 NPs / BiOI NSs electrodes;
[0056] 4) Add 8 µL of Au NPs solution to B-TiO 2 NPs / BiOI NSs electrode surface, prepared B-TiO 2 NPs / BiOINSs / Au NPs electrodes;
[0057] 5) Drop 5 µL, 10 µg / mL procalcitonin capture antibody solution onto the surface of ...
Embodiment 3
[0061] Example 3 B-TiO 2 The preparation of NPs, the steps are as follows:
[0062] 4.0 g P25 titania nanoparticles and 1.5 g NaBH 4 Mixed and ground for 30 min, calcined at 300 °C for 50 min in an argon atmosphere tube furnace, cooled to room temperature, centrifuged with ultrapure water and ethanol for 3 times, and placed in a vacuum oven at 35 °C for 12 h to obtain B-TiO 2 NPs.
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