Preparation method of photoelectric active material of multi-quantum-dot sensitized TiO2

The invention discloses a preparation method of a photoelectric active material of multi-quantum-dot sensitized TiO2. The preparation method comprises the following steps: transferring thioglycolic acid TGA into ultrapure water containing Cd (AC)2. 2H2O under the condition of introducing N2 to obtain a mixed solution A; then adjusting the pH value of the mixed solution A to 10 by using NaOH, which is accompanied by the change of the solution from turbid to clear, wherein a mixed solution B is obtained at the moment; adding trisodium citrate and Na2TeO3 into the mixed solution B, then injecting NaBH4 and conducting bubbling for 10 minutes by using N2; and transferring the solution in the step 3 into a reaction kettle for reaction to obtain yellow CdTe QDs, and storing the yellow CdTe QDs at 4 DEG C. The method disclosed by the invention has the beneficial effects that the CdS QDs and the CdTe QDs are adopted to co-sensitize TiO2, a CdS QDs/CdTe QDs/TiO2 NPs composite material is successfully prepared, and due