▎ 摘　　要

NOVELTY - Construction method for gallium nitride-zinc oxide solid solution based Z-type photocatalytic water splitting reaction system, comprises (i) preparing gallium nitride-zinc oxide solid solution (I), (ii) using (I)-surface loading metal oxide co-catalyst as oxidation water oxygen evolution photocatalyst in Z system, (iii) preparing hydrogen evolution photocatalyst, and support noble metal hydrogen production cocatalyst, and (iv) adding the (I)-oxygen evolution photocatalyst prepared in step (ii) and the hydrogen evolution photocatalyst prepared in step (iii) into water, and adding electron transport medium to completing the construction of the Z-type photocatalytic water splitting reaction system. USE - The method is useful in construction method for gallium nitride-zinc oxide solid solution based Z-type photocatalytic water splitting reaction system. ADVANTAGE - The reaction system: has high activity and strong stability; utilizes GaN:ZnO solid solution with excellent light absorption characteristics, which improves the utilization rate of solar energy for the existing Z-type photocatalytic water splitting reaction system, and the solid solution has excellent photocatalytic activity and stability, which is conducive to improving the activity and stability of the entire Z-type photocatalytic water splitting reaction system; and can adjust the ratio of Zn/Ga in GaN:ZnO, which is beneficial to the regulation of reactivity. DETAILED DESCRIPTION - Construction method for gallium nitride-zinc oxide solid solution based Z-type photocatalytic water splitting reaction system, comprises (i) preparing gallium nitride-zinc oxide solid solution of formula ((GaN)x(ZnO)1-x) (I), (ii) using (I)-surface loading metal oxide co-catalyst as oxidation water oxygen evolution photocatalyst in Z system, (iii) preparing hydrogen evolution photocatalyst, and support noble metal hydrogen production cocatalyst, and (iv) adding the (I)-oxygen evolution photocatalyst prepared in step (ii) and the hydrogen evolution photocatalyst prepared in step (iii) into water, and adding electron transport medium to completing the construction of the Z-type photocatalytic water splitting reaction system. x = 0-1. An INDEPENDENT CLAIM is also included for catalyst composition for a Z-type photocatalytic water splitting reaction system, comprising (GaN)x(ZnO)1-xsolid solution loaded with metal oxide cocatalyst on the surface is used as the oxygen evolution photocatalyst, semiconductor material is used as the hydrogen evolution photocatalyst, and the redox couple, metal conductor or non-metallic conductive medium are used as an electron transport medium.