Synthesis and application of water soluble ZnxCd(1-x)S nano composite material used for copper ion determination
A nano-composite material, water-soluble technology, applied in the nano field, can solve the problem of no quantum dot preparation method, and achieve the effects of easy control of production conditions, simple preparation method and low cost
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[0018] Implementation example 1:
[0019] a. There is 4.0×10 in the melt -4 mol / L cadmium chloride and 1.0×10 -4 Add 4.8 mg of cysteine to 50 mL of mol / L zinc sulfate aqueous solution and stir electromagnetically to prepare a mixed solution of Cd-Cys and Zn-Cys;
[0020] b. Adjust the pH of the mixed solution to 7.0 with a 0.1M NaOH solution, and flush with high-purity nitrogen for 30 minutes to remove the oxygen in the mixed solution;
[0021] c. Add 0.1mL of 0.2mol / L sodium sulfide solution to the above-mentioned mixed solution and heat to reflux for 30 minutes to obtain water-soluble Zn x Cd (1-x) S nanocomposite materials.
Example Embodiment
[0022] Implementation example 2:
[0023] a. There is 4.0×10 in the melt -4 mol / L cadmium nitrate and 2.0×10 -4 Add 6.0 mg of cysteine to 50 mL of mol / L zinc nitrate aqueous solution to prepare a mixed solution of Cd-Cys and Zn-Cys;
[0024] b. Adjust the pH of the mixed solution to 7.0 with a 0.1M KOH solution, and flush with high-purity nitrogen for 30 minutes to remove the oxygen in the mixed solution;
[0025] c. Add 0.1mL 0.2mol / L sodium sulfide to the above mixed solution and heat it to reflux for 15 minutes to obtain Zn x Cd (1-x) S nanocomposite materials.
Example Embodiment
[0026] Implementation example 3:
[0027] a. There is 4.0×10 in the melt -4 mol / L cadmium nitrate and 5.0×10 -5 14.4mg cysteine was added to 50mL of mol / L zinc sulfate aqueous solution to prepare a mixed solution of Cd-Cys and Zn-Cys;
[0028] b. Adjust the pH of the mixed solution to 7.0 with a 0.1M aqueous ammonia solution, flush into high-purity nitrogen to remove oxygen in the mixed solution;
[0029] c. Add 0.1mL 0.2mol / L sodium sulfide to the above mixed solution and heat it to reflux for 1 hour to obtain Zn x Cd (1-x) S nanocomposite materials.
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