The invention discloses a g-C3N4 (at) Zn / Eu-MOF composite dual-energy light conversion agent and a preparation method thereof, and a dual-energy light conversion film and a preparation method thereof. The preparation method comprises the following steps: firstly, preparing g-C3N4 by high-temperature
calcination of
melamine; secondly, preparing Zn / Eu-MOF through a
hydrothermal reaction of
europium nitrate,
zinc nitrate,
trimesic acid and DMF; and finally, dissolving g-C3N4 in
ethanol, carrying out ultrasonic treatment, adding Zn / Eu-MOF, and stirring for a certain time to obtain the g-C3N4-Zn / Eu-MOF composite dual-energy light conversion agent. And adding the g-C3N4atZn / Eu-MOF composite dual-energy light conversion agent into a homogeneous
aqueous solution of PVA, uniformly stirring, and
drying at 40 DEG C to obtain the PVA-based dual-energy light conversion film. The g-C3N4 and Zn / Eu-MOF are combined to obtain the
blue light and
red light dual-energy composite light conversion material, the light absorption range is widened, and the light absorption performance is improved, so that
ultraviolet light is effectively absorbed, efficient conversion of short-wave light is achieved, the
light energy utilization efficiency is remarkably improved, meanwhile, the light stability is enhanced, the durability of a PVA-based dual-energy light conversion film in the agricultural environment is enhanced, and the application prospect is wide. And the development of
sustainable agriculture can be promoted.