Novel Pb2+ supersensitive detecting method based on photoelectrochemical sensing
A photoelectrochemical, ultra-sensitive technology, applied in the field of photoelectrochemical sensing of analytical chemistry, to achieve good selectivity, high sensitivity, and easy operation
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[0022] Add 50mL0.01M CdCl to a 100mL three-neck flask 2 solution and 250 μL thioglycolic acid, while stirring, nitrogen gas was passed into the solution for 30 min. During this time, the pH of the mixture was adjusted to 11 using 1 M NaOH solution. Then, add 5 mL of 0.1M Na 2 S solution was heated to reflux at 110° C. with nitrogen for 4 h. In this series of experiments, CdS quantum dots with S / Cd ratio of 1:1 can be obtained. Immerse the cleaned and dried ITO electrode in 2% diethylene glycol diacrylate solution for 10 minutes, take it out and wash it with water; then immerse it in the spare CdS quantum dot solution for 10 minutes, take it out and wash it with water; repeat this process for 3 Once, the desired multilayer film modified electrode was obtained; next, the CdS quantum dot modified electrode was immersed in 20 mg of 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride at room temperature Salt and 10 mg N-hydroxysuccinimide in 1.0 mL distilled water for on...
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