The invention belongs to the technical field of nano material preparation, and relates to a photocatalyst, in particular to a preparation method of an MoS2 and hole extraction functionalized
carbon quantum dots (fCDs) co-modified Ag-In-Zn-S
quantum dot. The preparation method comprises the following steps: dissolving
silver nitrate,
indium nitrate,
zinc acetate and L-
cysteine in water, and regulating the pH value to 8.5 by using a NaOH solution; continuously adding an fCDs precursor and
thioacetamide, uniformly stirring under an ultrasonic condition, carrying out
hydrothermal reaction for 2-4 hours at 110-140 DEG C, cooling to
room temperature, centrifuging, and washing to obtain AIZS / fCDs; and dissolving the prepared AIZS / fCDs and an MoS2 precursor in water, mechanically stirring for 8-16 hours, centrifuging, and washing to obtain the MoS2 / AIZS / fCDs photocatalyst. According to the invention, the prepared MoS2 / AIZS / fCDs photocatalyst is also applied to photocatalytic
hydrogen production. The method is simple in process, convenient for
batch production, non-toxic and harmless, and meets the environment-friendly requirement. The raw materials are low in cost and easy to obtain. Under the excitation of visible light, photo-generated holes and electrons are respectively and rapidly transferred to MoS2 and fCDs, so that the recombination is reduced, more electrons can be used for
hydrogen production reaction, and the photocatalytic performance is improved.