Electrochemiluminescence sensor for detecting insulin by quenching CdS hybridized TiO2 nanoribbon through gold-curcumin nanoparticles
A nanoparticle, curcumin technology, applied in the direction of material electrochemical variables, scientific instruments, instruments, etc., to achieve the effect of short response time, high sensitivity detection, and low dosage
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Embodiment 1
[0036] Example 1 Preparation of CdS@TiO 2 chitosan solution
[0037] Disperse 0.1 g of cadmium acetate in 30 mL of ultrapure water, add 25 mg of titanium dioxide nanobelts, and sonicate for 1 h. Then, add 5 mL of 5 M Na 2 S solution, stirred for 12 h, transferred the above solution to a 100 mL reactor, reacted at 160 °C for 16 h, centrifuged, washed, and dried to obtain CdS@TiO 2 nanobelt.
[0038] The chitosan solution with a mass fraction of 0.5% was prepared by adding 0.5 g of chitosan to 100 mL of acetic acid with a volume fraction of 1%, and stirring for 2 h.
Embodiment 2
[0039] Example 2 Preparation of CdS@TiO 2 chitosan solution
[0040] Disperse 0.1 g of cadmium acetate in 30 mL of ultrapure water, add 50 mg of titanium dioxide nanobelts, and sonicate for 1 h. Then, add 5 mL of 5 M Na 2 S solution, stirred for 12 h, transferred the above solution to a 100 mL reactor, reacted at 160 °C for 16 h, centrifuged, washed, and dried to obtain CdS@TiO 2 nanobelt.
[0041] The chitosan solution with a mass fraction of 0.5% was prepared by adding 0.5 g of chitosan to 100 mL of acetic acid with a volume fraction of 1%, and stirring for 2 h.
Embodiment 3
[0042] Example 3 Preparation of Secondary Antibody-Gold-Curcumin / ZIF-8 Solution
[0043] (1) Preparation of gold-curcumin nanoparticles
[0044] First, 8 mg of curcumin was dispersed into 5 mL of dimethyl sulfoxide to form a transparent and uniform solution. Then, 2 mL of curcumin-dimethyl sulfoxide solution was added to 45 mL of ultrapure water, and stirred under reflux at 100 °C. Add 100 μL 0.1 M NaOH, when the solution is heated to 100 °C, add 1 mL 2% HAuCl 4 The solution was stirred for 1 h, cooled to room temperature, and dialyzed with a 12 kDa dialysis bag to remove unreacted impurities and small particles to obtain a gold-curcumin solution.
[0045] (2) Preparation of gold-curcumin / ZIF-8 nanoflowers
[0046] Mix 1 mL of 2-methylimidazole with 2 mL of gold-curcumin solution and stir for 10 min. Afterwards, 1 mL of 20 mM zinc acetate solution and 0.05 g of bovine serum albumin were added, and stirred for 4 h. Finally, the obtained gold-curcumin / ZIF-8 nanoflowers were...
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