Preparation and application of alpha fetoprotein and carcino-embryonic antigen electrochemiluminescence sensor
A technology of alpha-fetoprotein and carcinoembryonic antigen, which is applied in the direction of chemiluminescence/bioluminescence, and analysis by making materials react chemically, can solve the problems of difficult early detection and early diagnosis of liver cancer, and improve sensitivity and detection efficiency effect
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Embodiment 1
[0039] Example 1 Preparation of PtNPsM-SiGS
[0040](1) Mix 6 mL, 2.66 mg / mL graphene oxide, 0.4 g cetyltrimethylammonium bromide (CTAB), 20 mg sodium hydroxide and 42 mL ultrapure water, sonicate for 30 min; 35°C Under magnetic stirring, add tetraethyl orthosilicate (TEOS) ethanol solution drop by drop, and react for 10 h; add 80 mL of 85% hydrazine hydrate, heat at 65°C for 3 h, and centrifuge and wash with ethanol three times; dissolve the product Stir in acetone for 24 h, centrifuge three times; dissolve the product in 50 mL of ethanol, add 150 μL of 3-aminopropyltriethoxysilane (APTES), stir for 10 h, and centrifuge; dissolve the product in 42.5 mL of water, Aminated mesoporous silicon-graphene nanocomposites (M-SiGS) were obtained.
[0041] (2) Mix 3 mL M-SiGS aqueous solution and 40 mL platinum nanoparticle solution, stir for 2 h, centrifuge twice, and dry in vacuum to obtain PtNPsM-SiGS.
[0042] The TEOS ethanol solution was prepared by dissolving 350 μL TEOS in 1....
Embodiment 2
[0043] Example 2 Preparation of PtNPsM-SiGS
[0044] (1) Mix 8 mL, 2.66 mg / mL graphene oxide, 0.5 g cetyltrimethylammonium bromide (CTAB), 20 mg sodium hydroxide and 42 mL ultrapure water, sonicate for 40 min; 40°C Under magnetic stirring, add tetraethyl orthosilicate (TEOS) ethanol solution drop by drop, and react for 11 h; add 80 mL of hydrazine hydrate with a mass fraction of 85%, heat at 70°C for 3 h, and centrifuge and wash with ethanol three times; dissolve the product Stir in acetone for 24 h, centrifuge three times; dissolve the product in 50 mL of ethanol, add 200 μL of 3-aminopropyltriethoxysilane (APTES), stir for 11 h, and centrifuge; dissolve the product in 42.5 mL of water , to obtain aminated mesoporous silicon-graphene nanocomposites (M-SiGS).
[0045] (2) Mix 4 mL M-SiGS aqueous solution and 50 mL platinum nanoparticle solution, stir for 3 h, centrifuge twice, and dry in vacuum to obtain PtNPsM-SiGS.
[0046] The TEOS ethanol solution was prepared by disso...
Embodiment 3
[0047] Example 3 Preparation of PtNPsM-SiGS
[0048] (1) Mix 10 mL, 2.66 mg / mL graphene oxide, 0.6 g cetyltrimethylammonium bromide (CTAB), 20 mg sodium hydroxide and 42 mL ultrapure water, sonicate for 50 min; 45°C Stir under magnetic force, add tetraethyl orthosilicate (TEOS) ethanol solution dropwise, and react for 12 h; add 80 mL of hydrazine hydrate with a mass fraction of 85%, heat at 75°C for 3 h, and centrifuge and wash with ethanol three times; dissolve the product Stir in acetone for 24 h, centrifuge three times; dissolve the product in 50 mL of ethanol, add 250 μL of 3-aminopropyltriethoxysilane (APTES), stir for 12 h, and centrifuge; dissolve the product in 42.5 mL of water , to obtain aminated mesoporous silicon-graphene nanocomposites (M-SiGS).
[0049] (2) Mix 5 mL M-SiGS aqueous solution and 60 mL platinum nanoparticle solution, stir for 4 h, centrifuge twice, and dry in vacuum to obtain PtNPsM-SiGS.
[0050] The TEOS ethanol solution was prepared by dissol...
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