Electroreduced graphene oxide-gold nanorods/poly(2,6-pyridine) dicarboxylic acid composite and its preparation method and application
A technology of pyridinedicarboxylic acid and gold nanorods, which is applied in the field of analysis and detection, can solve problems such as difficult dispersion, poor compatibility, and easy agglomeration, and achieve the effects of high dispersion, easy operation, and high catalytic activity
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[0065] (1) Preparation of gold nanorods
[0066] (a) Gold seed preparation: 240 μL of freshly prepared NaBH in an ice bath with a concentration of 10 mmol / L 4 With 2.0mL cetyltrimethylammonium bromide (0.20mol / L) and 2.0mL HAuCl 4 (0.50mmol / L) was mixed thoroughly, and after stirring vigorously for 2min, the gold seed solution was placed at 27°C for 2h;
[0067] (b) Gold rod preparation: 5.0 mL of 0.2 mol / L cetyltrimethylammonium bromide and 0.2 mL of AgNO 3 (4mmol / L) mixed well, add 5.0mL HAuCl under the condition of slow stirring at room temperature 4 (1.0mmol / L), then 1.0mL ascorbic acid (0.1mol / L) was slowly dropped into the mixed solution, after that, 1mL gold seed solution was added, and the gold nanorods were grown at 30°C for 12h. Afterwards, excess cetyltrimethylammonium bromide was separated by centrifugation at a rotational speed of 14,000 rpm. Finally, the cetyltrimethylammonium bromide-stabilized AuNRs sediment was redispersed in water and kept in a refrigerat...
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